DIVISION 50 WASTEWATER COLLECTION SYSTEMS€¦ · contained in these various documents and...

JOINT BASE ELMENDORF-RICHARDSON STANDARD CONSTRUCTION SPECIFICATIONS

AND DETAILS

DIVISION 50 WASTEWATER COLLECTION

SYSTEMS 2015

Rev.001

714 FOURTH AVENUE, SUITE 100 FAIRBANKS, ALASKA

PO BOX 74040 FAIRBANKS, AK 99707

(907) 455-1500

www.doyonutilities.com

http://www.doyonutilities.com/

JBER STANDARD CONSTRUCTION SPECIFICATIONS AND DETAILS DIVISION 50 – WASTEWATER COLLECTION SYSTEMS

2015 Rev.001 i Doyon Utilities, LLC

TABLE OF CONTENTS SECTION 50.01 - GENERAL ....................................................................................................... 1

Article 50.01.1 - Scope, Applicability, and Content of Specifications ........................................ 1 Article 50.01.2 - Safety .............................................................................................................. 1 Article 50.01.3 - Alaska Department of Environmental Conservation (ADEC) Approvals ......... 1 Article 50.01.4 - Applicable Standards ...................................................................................... 2 Article 50.01.5 - Contaminated Material .................................................................................... 3 Article 50.01.6 - JBER Access Privileges for Contractor Personnel ......................................... 3 Article 50.01.7 - Inspection, Notices, and Official Communications .......................................... 3 Article 50.01.8 - Utility Locations and Dig Clearance Permit Requirements ............................. 4 Article 50.01.9 - Hot Work Permit Requirements ...................................................................... 4 Article 50.01.10 - Fire Hydrant Use Permit Requirements ........................................................ 4 Article 50.01.11 - Submittals ..................................................................................................... 5 Article 50.01.12 - Permanent Materials Furnished by Doyon Utilities and by Contractor ......... 5 Article 50.01.13 - Other Division Requirements ........................................................................ 6 Article 50.01.14 - Wastewater Shutdown Scheduling and Duration ......................................... 7 Article 50.01.15 - Wastewater and/or Water System Valve Operation ..................................... 7 Article 50.01.16 - Site Housekeeping and Clean-Up ................................................................ 7

SECTION 50.02 - GRAVITY SEWER LINES AND FORCE MAINS ............................................ 8 Article 50.02.1 - General ........................................................................................................... 8 Article 50.02.2 - Material ........................................................................................................... 9 Article 50.02.3 - Construction .................................................................................................. 14 Article 50.02.4 - Inspection, Cleaning, Repair as Required, and Testing ............................... 30 Article 50.02.5 - Demolition ..................................................................................................... 35

SECTION 50.03 - SANITARY SEWER MANHOLES ................................................................. 37 Article 50.03.1 - General ......................................................................................................... 37 Article 50.03.2 - Material ......................................................................................................... 37 Article 50.03.3 - Construction .................................................................................................. 38

SECTION 50.04 - SANITARY SEWER LIFT STATIONS .......................................................... 41 Article 50.04.1 - General ......................................................................................................... 41 Article 50.04.2 - Material ......................................................................................................... 41 Article 50.04.3 - Construction .................................................................................................. 41

SECTION 50.05 - FORCE MAIN PERMANENT VENTS ........................................................... 42 Article 50.05.1 - General ......................................................................................................... 42 Article 50.05.2 - Material ......................................................................................................... 42 Article 50.05.3 - Construction .................................................................................................. 42

SECTION 50.06 - SANITARY SEWAGE BYPASS PUMPING .................................................. 43 Article 50.06.1 - General ......................................................................................................... 43 Article 50.06.2 - Construction .................................................................................................. 43

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2015 Rev.001 ii Doyon Utilities, LLC

SECTION 50.06 - SANITARY SEWAGE BYPASS PUMPING ................................... 43 Article 50.06.1 - General ........................................................................................................... 43 Article 50.06.2 - Construction ................................................................................................... 43

SECTION 50.07 - NEW CONNECTIONS TO EXISTING SANITARY SEWER MANHOLES............................................................................. 45

Article 50.07.1 - General ........................................................................................................... 45 Article 50.07.2 - Material ........................................................................................................... 45 Article 50.07.3 - Construction ................................................................................................... 45

SECTION 50.08 - EXISTING MANHOLE REHABILITATION OR REMOVAL............. 48 Article 50.08.1 - General ........................................................................................................... 48 Article 50.08.2 - Material ........................................................................................................... 48 Article 50.08.3 - Construction ................................................................................................... 49

SECTION 50.09 - ADJUST EXISTING SANITARY SEWER MANHOLE FRAMES AND COVERS TO FINISH GRADE AND ADJUST EXISTING MANHOLE CONES OR FLAT TOP SLABS............................... 51


SECTION 50.10 - ADJUST EXISTING CLEANOUTS TO FINISH GRADE ................. 53 Article 50.10.1 - General ........................................................................................................... 53 Article 50.10.2 - Material ........................................................................................................... 53 Article 50.10.3 - Construction ................................................................................................... 53

SECTION 50.11 - REMOVE AND DISPOSE OF EXISTING CESSPOOLS OR SEPTIC TANKS AND CONNECT TO NEW SEWER SERVICES ............. 55


LIST OF WASTEWATER COLLECTION SYSTEMS STANDARD DETAILS ............. 58 Detail # Description 50.02-1 JBER Sewer Line Typical Trench Section 50.02-2 JBER Requirements for New Sewer Line Crossing of Existing Water Line 50.02-3 JBER 8” to 12”ø Ductile Iron Gravity Sewer Drop Connection 50.02-4 JBER 8”ø Ductile Iron Gravity Sewer End-of-Main Cleanout 50.02-5 JBER Typical Gravity Sewer Service 50.02-6 JBER Gravity Sewer Service Stubbed Out for Future 50.02-7 JBER Gravity Sewer Service for On-Site Lift Station 50.02-8 JBER Standard 4”ø Gravity Sewer Service Cleanout Access 50.02-9 JBER Special 4” or 6”ø Gravity Sewer Service Cleanout Access

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2015 Rev.001 iii Doyon Utilities, LLC

50.02-10 JBER Deep Sewer Riser for Gravity Sewer Services 50.02-11 JBER Sewer Line Railroad Crossing in Casing 50.03-1 JBER 48”ø Gravity Sewer Manhole for 4” to 24”ø Pipe 50.03-2 JBER 72”ø Gravity Sewer Manhole with 48”ø Top for 30” to 36”ø Pipe 50.03-3 JBER 72”ø Gravity Sewer Manhole with Flat Top for 30” to 36”ø Pipe 50.03-4 JBER Gravity Sewer Manhole Step 50.03-5 JBER Typical Gravity Sewer Manhole Channel 50.03-6 JBER Gravity Sewer Manhole Beaver Slide 50.03-7 JBER Gravity Sewer Standard Manhole Cover 50.03-8 JBER Gravity Sewer Standard Manhole Frame 50.03-9 JBER Gravity Sewer Water-Tight Manhole Cover 50.03-10 JBER Gravity Sewer Water-Tight Manhole Frame 50.03-11 JBER Gravity Sewer Manhole Height Above or Depth Below Finished Grade 50.09-1 JBER Existing Gravity Sewer Manhole Frame Adjustment 50.09-2 JBER Existing Gravity Sewer Manhole Cone Adjustment

CHANGE LOG - Revisions between 2014 Standard and 2015 Rev.001 Standard

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2015 Rev.001 1 Doyon Utilities, LLC

SECTION 50.01 - GENERAL

Article 50.01.1 - Scope, Applicability, and Content of Specifications The Work covered by these Specifications consists of providing all labor, supervision, equipment, supplies, material, transportation, handling and storage, and performing all operations necessary to complete new construction, modification, and/or repair of wastewater collection facilities operated by Doyon Utilities LLC on Joint Base Elmendorf Richardson, hereafter referred to as JBER.

All Division 50 work shall be in accordance with the Plans, Special Provisions, Standard Details, and all applicable JBER Specifications. In the event of differences between the requirements contained in these various documents and specifications, the most stringent requirements, as determined by Doyon Utilities’ Authorized Representative, shall govern.

Much of the content of this JBER Division 50 is taken from the 2009 Municipality of Anchorage Standard Specifications (MASS), but this JBER Division 50 also includes requirements not found in the 2009 MASS.

Article 50.01.2 - Safety The Contractor is solely responsible for all construction-related safety and safety compliance, including, but not limited to: worker and jobsite safety; safety of Doyon Utilities employees and agents; safety of other JBER personnel and property; safety of the general public; safety of military operations; safety of wildlife and the environment; and, safety of the water distribution system, the wastewater collection system, and other utility safety.

Wastewater collection system safety includes, but is not limited to, avoidance of cross-connections between wastewater collection systems and potable water systems, and integrity of wastewater collection systems to avoid direct health hazards, groundwater pollution, and surface water pollution.

Article 50.01.3 - Alaska Department of Environmental Conservation (ADEC) Approvals Wastewater collection system construction plans, including design-build plans, and major changes to ADEC-approved plans, require ADEC approval or re-approval. Contractors submitting design–build plans, and Contractors proposing major field changes to ADEC-approved plans, shall submit plans for ADEC review and approval. A minimum of 30 calendar days shall be allowed for ADEC review. All ADEC plan review fees shall be at Contractor expense. A copy of the ADEC “Approval to Construct” and/or ADEC review comments shall be provided to Doyon Utilities’ Authorized Representative.

If the Contractor is required to obtain an ADEC “Approval to Construct”, the Contractor shall not begin construction until “Approval to Construct” has been received from ADEC, and provided to and accepted by Doyon Utilities’ Authorized Representative.

If the Contractor is required to obtain an ADEC “Approval to Construct”, the Contractor shall also be required to obtain an ADEC “Approval to Operate”. The system shall not be placed in operation and final payment shall not be authorized for the Contractor until “Approval to Operate” has been received from ADEC, and provided to and accepted by Doyon Utilities’ Authorized Representative.



Article 50.01.4 - Applicable Standards The latest revisions of the following standards of the American Association for State Highway and Transportation Officials (AASHTO), the American National Standards Institute (ANSI), the American Society of Testing and Materials (ASTM), the American Water Works Association (AWWA), and the International Association of Plumbing and Mechanical Officials ( IAPMO) are hereby made a part of these Specifications.

AASHTO M45 ....................... Sand for Cement Mortar AASHTO M306 ..................... Standard Specification for Drainage, Sewer, Utility, and Related

Castings ASTM A48 ............................. Specifications for Gray Iron Castings ASTM A185 ........................... Standard Specification for Steel Welded Wire Reinforcement,

Plain, for Concrete ASTM A615 ........................... Standard Specification for Deformed and Plain Carbon-Steel Bars

for Concrete Reinforcement ASTM A746 ........................... Standard Specification for Ductile Iron Gravity Sewer Pipe ASTM C150 .......................... Specification for Portland Cement AWWA C153 ......................... Ductile-Iron Compact Fittings for Water Service ASTM C478 .......................... Specification for Precast Reinforced Concrete Manhole Sections ASTM C923 .......................... Standard Specification for Resilient Connectors Between Reinforced

Concrete Manhole Structures, Pipes, and Laterals ASTM D638 .......................... Standard Test Method for Tensile Properties of Plastics ASTM D2321 ........................ Standard Practice for Underground Installation of Thermoplastic Pipe

for Sewers and Other Gravity-Flow Applications ASTM D3035 ........................ Specification for Polyethylene (PE) Plastic Pipe (SDR-PR) Based

on Controlled Outside Diameter ASTM D3261 ........................ Specification for Butt Heat Fusion Polyethylene (PE) Plastic

Fittings for Polyethylene (PE) Plastic Pipe and Tubing ASTM D3350 ........................ Specification for Polyethylene Plastics Pipe and Fittings Materials ASTM F1055 ......................... Specification for Electrofusion Type Polyethylene Fittings for Outside

Diameter Controlled Polyethylene and Crosslinked Polyethylene (PEX) Pipe and Tubing

ASTM F2620 ......................... Standard Practice for Heat Fusion Joining of Polyethylene Pipe and Fittings

AWWA C104/ANSI A21.4 ..... Cement-Mortar Lining for Ductile-Iron Pipe and Fittings for Water AWWA C105/ANSI A21.5 ..... Polyethylene Encasement for Ductile Iron Piping for Water and

Other Liquids AWWA C110/ANSI A21.10 ... Ductile-Iron and Gray-Iron Fittings, 3 in. Through 48 in., for Water

and Other Liquids AWWA C111/ANSI A21.11 ... Rubber-Gasket Joints for Ductile-Iron and Gray-Iron Pressure

Pipe and Fittings AWWA C151/ANSI A21.51 ... Ductile-Iron Pipe, Centrifugally Cast in Metal Molds, or Sand-Lined

Molds, for Water or Other Liquids UPC ...................................... Uniform Plumbing Code, latest edition adopted and as amended

by the State of Alaska



Article 50.01.5 - Contaminated Material Unless otherwise noted in the Contract Documents, neither JBER nor Doyon Utilities LLC is aware of any contaminated material within the project limits. If such material is encountered, the Contractor shall notify Doyon Utilities’ Authorized Representative immediately for direction. Unless the contamination was caused by Contractor’s operations, discovery of contaminated material will be treated as a changed condition.

Article 50.01.6 - JBER Access Privileges for Contractor Personnel The Contractor shall provide Doyon Utilities LLC with a list of personnel, including Subcontractor personnel, requiring regular access to JBER, as well as .required personnel identification documents as required by JBER military base security personnel, all at least 7 calendar days prior to the date that access is required. JBER access privileges for Contractor personnel are contingent on passing of background checks to the satisfaction of JBER military base security personnel.

JBER access privileges for Contractor and Subcontractor personnel are revocable at the discretion of JBER military base security personnel.

Denial or revocation of JBER access privileges by JBER military base security personnel for Contractor or Subcontractor personnel shall not be grounds for extra Contractor or Subcontractor compensation.

Article 50.01.7 - Inspection, Notices, and Official Communications All work activities covered under this section, including but not limited to traffic maintenance, storm water pollution prevention, construction, hot tapping, alignment and debris inspection, flushing and cleaning, pressure testing, continuity testing, wastewater service shutdowns, temporary bypass pumping, on-site wastewater system removal, and punch list work, are subject to inspection and acceptance by Doyon Utilities LLC. Work completed without inspection by Doyon Utilities’ Authorized Representative shall be subject to rejection.

Unless specifically noted otherwise in this Division 50, the Contractor shall schedule hot tapping, alignment and debris inspection, flushing and cleaning, air testing, hydrostatic testing, continuity testing, wastewater service shutdowns, temporary bypass pumping start-up, on-site system removal, punch list work, and similar activities to occur on non-holiday weekdays during normal working hours of 7:30 AM to 4:00 PM to facilitate inspection by Doyon Utilities’ Authorized Representative.

Written notice of traffic lane closures and wastewater shutdowns shall be provided to Doyon Utilities LLC by the Contractor at least 14 calendar days in advance.

Written notice of traffic lane closures shall be provided to the JBER Fire Department and JBER Police Department by the Contractor at least 14 calendar days in advance.

Written notice of traffic maintenance (excluding lane closure work), storm water pollution prevention activities, construction, pressure testing, continuity testing, wastewater service shutdowns, temporary bypass pumping, on-site system removal, punch list work, and similar activities requiring inspection shall be provided to Doyon Utilities LLC by the Contractor at least 5 calendar days prior to beginning any of these operations.

The Contractor shall notify Doyon Utilities’ Authorized Representative again in person or by e-mail one calendar day before starting any of the work listed in the previous paragraph.



For wastewater service shutdowns and similar activities affecting wastewater system customers, first written notice of these activities, acceptable to Doyon Utilities’ Authorized Representative, shall be provided by the Contractor to all affected customers and to Doyon Utilities’ Authorized Representative at least 14 calendar days prior to beginning any of these activities. A second written notice of these activities, acceptable to Doyon Utilities’ Authorized Representative, shall be provided by the Contractor to all affected customers and to Doyon Utilities’ Authorized Representative 24 to 36 hours prior to beginning any of these activities.

Failure by the Contractor to provide the required notice(s) shall be grounds for issuance of a stop-work order and/or complete rejection of the work.

If the Contractor for any reason fails to perform work, for which advance notice is required, on the originally scheduled date and time, then the full notice period(s) as specified herein shall start over again and all notices specified herein shall be provided for the new scheduled dates and times for the work.

To be considered official and binding, all communication from and to Doyon Utilities LLC shall be in writing.

Article 50.01.8 - Utility Locations and Dig Clearance Permit Requirements The Contractor shall place a telephone, fax, or on-line locate request with Alaska Digline Inc. (Anchorage telephone - 278-3121 or 811, statewide telephone - 1-800-478-3121, statewide fax – 1-907-278-0696, on-line – http://www.akonecall.com/). Documentation of the Alaska Digline request shall be provided to Doyon Utilities’ Authorized Representative. The Contractor shall coordinate with utility company locator personnel to locate all existing utilities before digging.

In addition to obtaining utility locations through Alaska Digline Inc., the Contractor obtain a Dig Clearance Permit from JBER CES (673 ABW Form 3 – BCE Work Clearance Request) and provide a copy of the fully executed Dig Clearance Permit to Doyon Utilities’ Authorized Representative. A minimum of 14 calendar days shall be allowed by the Contractor for complete processing of a Dig Clearance Permit. The Contractor shall comply with all requirements of the fully executed Dig Clearance Permit.

Article 50.01.9 - Hot Work Permit Requirements For any activity producing open flames, or heat or sparks sufficient to cause combustion, the Contractor obtain a hot work permit signed by the JBER Fire Department, and provide a copy of the fully executed hot work permit to Doyon Utilities’ Authorized Representative. A minimum of 14 calendar days shall be allowed by the Contractor for complete processing of a hot work permit. The Contractor shall comply with all requirements of the fully executed hot work permit.

Article 50.01.10 - Fire Hydrant Use Permit Requirements Prior to use of any JBER fire hydrant for any reason other than emergency usage, the Contractor shall obtain a fire hydrant use permit from Doyon Utilities. Issuance of fire hydrant use permits is at the discretion of Doyon Utilities. A minimum of 3 working days shall be allowed by the Contractor for complete processing of a fire hydrant use permit. The Contractor shall comply with all requirements of the fully executed fire hydrant use permit.



Article 50.01.11 - Submittals The Contractor shall provide paper submittals or electronic submittals, at the option of Doyon Utilities’ Authorized Representative, for review and acceptance by Doyon Utilities. Duplicate paper submittals shall be supplied in the quantities requested by Doyon Utilities’ Authorized Representative. Submittals shall clearly document compliance with Contract requirements, as well as any deviations from Contract requirements, all to the satisfaction of Doyon Utilities’ Authorized Representative. Any materials ordered and/or work done in advance of written acceptance of submittals by Doyon Utilities’ Authorized Representative is subject to rejection.

Submittals for Doyon Utilities review and acceptance are required for the following items.

1. ADEC “Approval to Construct” and/or ADEC review comments (as applicable).

2. Documentation of Alaska Digline utility locate requests.

3. Fully executed Dig Clearance Permit(s).

4. Fully executed hot work permit(s).

5. Submittals for all permanent materials.

6. HDPE butt fusion lead technician resume and certificate for HDPE piping butt fusion.

7. Hot tap procedures and hot tap supervisor resume.

8. Gravity sewer main closed circuit television inspection DVDs and written reports.

9. Sanitary sewer bypass pumping plans.

10. 14 day and 24 hour advance notifications to wastewater customers of shutdowns or other possible disruptions of normal wastewater collection service.

11. Work Site Traffic Supervisor certification and resume.

12. Traffic Control Plans.

13. Red-lined drawings.

14. ADEC “Approval to Operate” (as applicable).

“ADEC Approval to Construct” and “Approval to Operate”, if required, shall be provided to Doyon Utilities’ Authorized Representative as soon as they are available from ADEC. Permanent material submittals shall be provided to Doyon Utilities’ Authorized Representative at least 30 calendar days prior to ordering of materials. Other submittals listed above shall be provided to Doyon Utilities’ Authorized Representative at least 14 calendar days prior to the activity covered by the submittal. Completed red-lined drawings shall be submitted to Doyon Utilities’ Authorized Representative within 14 calendar days of substantial completion.

Doyon Utilities’ Authorized Representative reserves the right to request additional submittals for other Contractor procedures and personnel qualifications.

Article 50.01.12 - Permanent Materials Furnished by Doyon Utilities and by Contractor Doyon Utilities may furnish some permanent materials on some projects. When Doyon Utilities does furnish permanent material, a list of these Doyon Utilities’-provided permanent materials, and locations where these Doyon Utilities’-provided materials shall be received by the Contractor, will be provided in the Contract Documents. The Contractor shall perform a complete take-off of all permanent materials required for the Project. The Contractor shall



furnish any and all permanent materials not supplied by Doyon Utilities, in order to complete the Project in accordance with the Plans, Standard Details, Special Provisions, and/or these Specifications.

The Contractor shall be responsible for receiving inspecting, and inventorying Doyon Utilities’-provided materials at locations specified in the Contract Documents, notifying Doyon Utilities Authorized Representative of damage, shortages, etc, loading as required, delivery to the jobsite, and unloading at the jobsite. Materials damaged during Contractor-provided loading, delivery to the jobsite, and/or unloading at the jobsite shall be replaced at Contractor expense.

Any surplus Doyon Utilities’-provided materials not used on a project shall remain the property of Doyon Utilities, and shall be delivered by the Contractor to the Doyon Utilities storage yard and carefully off-loaded and stored on Contractor-provided wooden pallets or other suitable dunnage.

Article 50.01.13 - Other Division Requirements Except as specifically stated otherwise in the various Sections of this Division 50, the following other Divisions and Sections of these Standard Specifications are incorporated by reference into all Sections of Division 50:

A. Storm Water Pollution Prevention, Clearing and Grubbing, Concrete and Asphalt Demolition, and Earthwork

The Contractor shall perform storm water pollution prevention, clearing and grubbing, concrete and asphalt demolition, earthwork, and related work in accordance with applicable sections of Division 20 - Earthwork.

B. Water Distribution Facility Construction

The Contractor shall construct water distribution facilities in accordance with applicable sections of Division 60 - Water Distribution Systems.

C. Surface Restoration

Unless shown otherwise on the Plans and/or Standard Details, specified otherwise in the Special Provisions, or directed otherwise by Doyon Utilities’ Authorized Representative, the Contractor shall provide the following materials as required for surface restoration:

1. For restoration of concrete pavement, sidewalks, curb and gutter, etc – Class AA-3 Portland cement concrete in accordance with Division 30 – Portland Cement Concrete, with concrete dimensions to match existing.

2. For restoration of asphalt pavement - Class E asphalt pavement, 2 inches minimum compacted thickness, in accordance with Division 40 - Asphalt Surfacing, over a 2 inches minimum compacted base of leveling course in accordance with Division 20 - Earthwork.

3. For restoration of gravel-surfaced roads, road shoulders, parking lots, etc. - Leveling course gravel surfacing, 2 inches minimum compacted thickness, in accordance with Division 20 - Earthwork.

4. For restoration of vegetated surfaces or bare dirt surfaces not scheduled for other surface restoration - 4 inches minimum rolled thickness of topsoil and hydro-seeding with Schedule A seeding mix (for mowed areas) or Schedule D



seeding mix (for unmowed areas) in accordance with Division 75 - Seeding, Landscaping, and Revegetation.

D. Construction Surveying and Red-Lined Drawings

The Contractor shall provide construction surveying and maintain red-lined drawings in accordance with Division 65 - JBER Construction Surveys. The red-lined drawings shall be up-dated weekly by the Contractor to the satisfaction of Doyon Utilities’ Authorized Representative. Completed red-lined drawings shall be submitted within 14 calendar days of substantial completion, for review and acceptance by Doyon Utilities’ Authorized Representative.

E. Traffic Maintenance

The Contractor is solely responsible to provide all traffic maintenance for vehicular, non-motorized, and pedestrian traffic. All traffic maintenance shall be in accordance with the Division 70 - Miscellaneous Construction, and the Manual of Uniform Traffic Control Devices, latest edition adopted by State of Alaska, and current State amendments. For any operations involving disruption of normal traffic flow, the Contractor shall provide Traffic Control Plans for review and acceptance by Doyon Utilities’ Authorized Representative. Traffic Control Plans shall be provided at least 14 calendar days prior to beginning any operations involving disruption of normal traffic flow. Acceptance of Traffic Control Plans by Doyon Utilities’ Authorized Representative is required prior to any operations involving disruption of normal traffic flow.

Article 50.01.14 - Wastewater Shutdown Scheduling and Duration Scheduling and durations of wastewater service shutdowns shall be subject to acceptance by Doyon Utilities’ Authorized Representative. No wastewater service shutdown shall exceed 6 hours in duration in any 24 hour period. Residential wastewater service shutdowns shall be started and completed on non-holiday weekdays between the hours of 9 AM to 3 PM. Non-residential wastewater service shutdowns shall be started and completed on days and during hours determined by Doyon Utilities’ Authorized Representative to minimize adverse consequences on JBER operations.

See Article 50.01.7 - Inspection, Notices, and Official Communications above for notification requirements for wastewater service shutdowns.

Article 50.01.15 - Wastewater and/or Water System Valve Operation Wastewater and/or water system valves shall be operated only by Doyon Utilities personnel unless others are authorized in writing in advance by Doyon Utilities’ Authorized Representative.

Article 50.01.16 - Site Housekeeping and Clean-Up Littering is strictly prohibited.

The Contractor shall clean up all construction debris as soon as possible after it is generated and store it properly in suitable containers, all to the satisfaction of Doyon Utilities’ Authorized Representative. Trash shall be disposed of weekly or more often if directed by Doyon Utilities’ Authorized Representative.

The entire project site shall be cleaned up of all debris and litter at the end of the project and all debris and litter shall be properly disposed of, all to the satisfaction of Doyon Utilities’ Authorized Representative.



SECTION 50.02 - GRAVITY SEWER LINES AND FORCE MAINS

Article 50.02.1 - General The Work under this Section includes construction of gravity sewer mains, gravity sewer services, and force mains for wastewater collection systems.

Force mains shall only be installed if gravity sewers are determined by Doyon Utilities’ Authorized Representative to be unfeasible. Installation of force mains must be approved in writing in advance by Doyon Utilities’ Authorized Representative.

The table below provides guidance as to types of sewer lines covered in this Section, diameters, allowable materials, and applicable Articles within this Section:

Types and Sizes of Sewer Lines, Types of Pipe, and Applicable Paragraphs in Section 50.02

Type of Sewer Line

Size of Sewer Line

Type of Pipe

Article 50.02.2 - Material

Article 50.02.3 -

Construction

Article 50.02.4 - Inspection, Cleaning

and Repair as Required, and

Testing

Gravity Sewer Mains

8” and Larger

Ductile Iron A, D, & E A, B, C, E,

F, G, & H A, B, C, D, E, F, J, & K

8” and Larger HDPE B & D A, B, C, F,

G, H, & H A, B, C, D, E, F, J, & K

Gravity Sewer

Services

4” and Larger

Ductile Iron A, D, & E A, B, C, E,

F, G, & H A, B, E, F,

J, & K

Force Mains

3” and Larger

Ductile Iron A, D, & E A, B, D. E,

F, G, & H A, B, G, H,

I, J, & K

2” Copper C & D A, B, D, F, G, & H

A, B, G, H, J, & K

Sewer Lines

in Casings

3” and Larger

Ductile Iron A, D, & E A, B, C, D,

E, F, G, & H A, B, C, D, E, F, G, I, J, & K

Refer to Standard Detail 50.02-1 for additional information on sewer line trench sections.

Refer to Standard Detail 50.02-2 for additional information on new sewer crossings of water lines.

Refer to Standard Detail 50.02-3 for additional information on gravity sewer main drop connections at manholes.

Refer to Standard Detail 50.02-4 for additional information on gravity sewer main line cleanouts.

Refer to Standard Details 50.02-5 through 50.02-8 for additional information on gravity sewer services, including services for on-site lift stations.

Refer to Standard Detail 50.02-9 for additional information on deep gravity sewer main service risers.



Refer to Standard Detail 50.02-10 for additional information on cased sewer line crossings of the Alaska Railroad.

Refer to Section 50.01 - General for additional general requirements.

Article 50.02.2 - Material A. Ductile Iron Piping

1. Ductile Iron Pipe for Gravity Sewer Mains and Services

Unless shown, noted, or directed otherwise, ductile iron sewer pipe shall conform to the requirements of AWWA C151, Class 52 for 4 inch diameter and Class 50 for 6 inch and larger diameters, with cement mortar lining conforming to the requirements of AWWA C104/ANSI A24.1.

Ductile iron pipe, for installation in existing Portland cement concrete gravity sewer lines at demolished sewer service locations, shall conform to the requirements of AWWA C151, Class 52, with cement mortar lining conforming to the requirements of AWWA C104/ANSI A24.1.

2. Ductile Iron Pipe for Sanitary Sewer Force Mains

Ductile iron pipe shall conform to the requirements of AWWA C151, Class 52, with cement mortar lining conforming to the requirements of AWWA C104/ANSI A24.1.

3. Ductile Iron Push-On Joint Gaskets and Restraints

Rubber push-on joint gasket joints for ductile iron pipe shall conform to the requirements of AWWA C111/ANSI A21.11.

Push-on joint restraint shall be provided by “U.S. Pipe Field LOK®” gaskets or Doyon Utilities’ Authorized Representative accepted equal.

4. Ductile Iron Mechanical Joint Fittings, Gaskets, Joint Restraints, and Bolting Materials

Fittings shall be 250 PSI minimum pressure rating, mechanical joint, cement lined, either cast iron or ductile iron. All fittings shall conform to the requirements of AWWA C153.

Rubber mechanical joint gasket joints shall conform to the requirements of AWWA C111.

Mechanical joint restraint shall be provided by “EBAA Iron MEGALUG®” or “Romac Industries RomaGrip” mechanical joint restraining glands, or Doyon Utilities’ Authorized Representative accepted equal.

All mechanical joint T-bolts and nuts supplied with fittings and appurtenances shall conform to ASTM A242 weathering steel. All T-bolts and nuts shall be factory-coated with a blue fluoropolymer coating for corrosion resistance. T-bolt lengths shall be of sufficient length that, when a bolt-up is complete, each bolt extends completely through and at least 1/8 inch beyond the nut, all around.

5. Ductile Iron Flange Materials

Field installed flanges shall be restrained flange coupling adapters shall be ductile iron ASTM A536, Grade 65-45-12, fusion bonded epoxy coated and lined, ANSI 16.5B Class 150 flange drilling, with break-away head restrainer bolts and heat-



treated restraining lugs, “Romac RFCA” or Doyon Utilities’ Authorized Representative accepted equal.

Field installed flanges that are not equipped with break-away head restrainer bolts and heat-treated restraining lugs, or similar restraining systems acceptable to Doyon Utilities’ Authorized Representative, shall not be allowed.

Rubber flange gaskets shall conform to the requirements of AWWA C111/ANSI A21.11.

Flange bolts and nuts shall be Type 304 stainless steel heavy hexagonal. All flange bolt diameters shall be 1/8 inch smaller than flange bolt hole diameters. All flange bolts shall be of sufficient length that, when a bolt-up is complete, each bolt extends completely through and at least 1/8 inch beyond the nut, all around. If stud bolts are used for flange bolt-up, the same length criteria shall apply to each end of each stud bolt.

6. Materials for Ductile Iron Deep Service Riser Gravity Sewer Service Connections to Mains

Ductile iron deep service riser connections to new ductile iron gravity sewer mains shall be made with standard reducing tees, main size by 4 inch or 6 inch branch, 250 PSI minimum pressure rating, mechanical joint, cement lined, either cast iron or ductile iron. Reducing tees shall conform to the requirements of AWWA C110/ANSI A21.10.

Ductile iron deep service riser connections to existing ductile iron gravity sewer mains shall be made with hot tapping sleeve kits for ductile iron main sizes from 8 inch to 24 inch nominal diameter and branch sizes of 4 inch or 6 inch nominal diameter. Tapping sleeve kits shall include a two-part full encirclement shell, an ANSI B16.5 Class 150 flanged outlet, test plug, and all necessary bolting and gasket materials for complete installation. The shell, lifter bars, armors, branch outlet, test plug, and all bolting materials shall be Type 304 stainless steel. The flange shall be ductile iron, ASTM 536-80, Grade 65-45-12. The wrap-around shell gasket and flange gasket shall be virgin SBR. Tapping sleeve kits shall be “Romac Industries Ductile+Plus SST” or Doyon Utilities’ Authorized Representative accepted equal.

Ductile iron riser components for deep service riser connections, including pipe, mechanical joint fittings, restraints, and flanges (if needed) shall be in accordance Article 50.02.2, paragraph A., subparagraphs 1., 4. and 5. above, as applicable.

7. Continuity Straps, Test Leads, Exothermic Weld Materials, and Valve Box Top Sections for Ductile Iron Force Mains

Continuity straps and test leads shall be stranded Number 2 AWG copper wire with HMWPE insulation suitable for direct burial.

Exothermic weld materials shall be “Erico Cadweld” or Doyon Utilities’ Authorized Representative accepted equal. Weld shot size shall be per manufacturer’s recommendations for the Class 52 ductile iron pipe and stranded #2 AWG copper wire.

Thermite weld caps, “Royston Handy Cap IP” or Doyon Utilities’ Authorized Representative accepted equal, shall be provided for protection of all exothermic welds. A coal tar pitch product acceptable to Doyon Utilities’ Authorized



Representative shall be provided to protect exposed bare metal not covered by thermite weld caps.

Standard cast iron valve box top sections with “Sewer” covers shall be provided for storage of day-lighted test leads.

8. Polyethylene Encasement for Ductile and Cast Iron Pipe

Polyethylene encasement shall conform to the most current edition of AWWA C105/ANSI A21.5.

B. High Density Polyethylene (HDPE) Piping

1. Butt Fusion HDPE Pipe and Fittings

High density polyethylene pipe (HDPE) and fittings shall be manufactured to meet or exceed the requirements of ASTM D3350 and shall be manufactured from PE4710 polyethylene compounds, cell classification 445574. HDPE pipe and fitting material compound shall contain color and ultraviolet (UV) stabilizer meeting or exceeding the requirements of Code C per ASTM D3350. Butt fusion fittings shall comply with ASTM D3261. All fittings shall have pressure class ratings not less than the pressure class rating of the pipe to which they are joined. HDPE pipe and fittings shall be manufactured to iron pipe size equivalent outside diameter.

HDPE pipe and fittings shall be SDR11 or heavier wall.

2. Electro Fusion HDPE Couplings and Fittings

Electro-fusion couplings and fittings shall comply with ASTM F1055. Unless specifically called out on the Plans or specified in the Special Provisions, use of HDPE electro-fusion couplings and/or electro-fusion fitting shall be subject to acceptance by Doyon Utilities’ Authorized Representative on a case by case basis. All electro-fusion couplings and fittings shall have pressure class ratings not less than the pressure class rating of the pipe to which they are joined.

3. HDPE Flange Materials

HDPE flange adapters shall have pressure class ratings not less than the SDR and pressure rating of the pipe to which they are joined. HDPE flange adapters shall be manufactured to iron pipe size equivalent outside diameter.

Flange back-up rings shall be Type 304 stainless steel, Class 150 flange drilling.

Rubber flange gaskets shall conform to the requirements of AWWA C111/ANSI A21.11.

Flange bolts and nuts shall be Type 304 stainless steel heavy hexagonal. All flange bolt diameters shall be 1/8 inch smaller than flange bolt hole diameters. All flange bolts shall be of sufficient length that, when a bolt-up is complete, each bolt extends completely through and at least 1/8 inch beyond the nut, all around. If stud bolts are used for flange bolt-up, the same length criteria shall apply to each end of each stud bolt.

C. Copper Tubing

1. Copper Tubing for Force Mains

Copper tubing shall be Type K soft drawn ASTM B75 seamless tubing.



2. Corporation Stops

Corporation stops, for connection of copper tubing to ductile pipe, shall be 85-5-5-5 ASTM B62 brass, full port ball type, 300 PSI cold water working pressure, MNPT threaded by flare copper.

3. Thaw Wire for Copper Tubing Force Mains

Thaw wire shall be stranded Number 2 AWG copper wire with HMWPE insulation suitable for direct burial.

D. Other Wastewater Collection System Materials

1. Gravity Sewer Service Connections to New Ductile Iron and HDPE Gravity Mains and Existing Asbestos Cement (AC) Gravity Mains

Standard gravity sewer service connections to new ductile iron and HDPE gravity mains and existing AC gravity mains, except deep service riser connections, shall be made in accordance with the Standard Details using “Romac Style CB” sewer saddles or Doyon Utilities’ Authorized Representative accepted equals.

2. Transition Couplings for Connection of Sewer Lines of Different Materials

Use of transition couplings is subject to acceptance by Doyon Utilities’ Authorized Representative on a case by case basis.

Where allowed, transition couplings for connecting ductile iron, HDPE, and/or AC piping materials to on another shall be “Romac Alpha”, “Romac Macro HP” (not approved for HDPE pipe), “Romac 501” (interior stiffening inserts required for connections of HDPE pipe), or Doyon Utilities’ Authorized Representative accepted equals, with gaskets as necessary to match piping diameters that are being joined.

Transition couplings for tie-in of new ductile pipe to existing Portland cement concrete gravity sewer main piping at demolished sewer service connections shall be “Romac RC501” reducing couplings or Doyon Utilities’ Authorized Representative accepted equals.

Transition couplings shall be fusion bonded epoxy coated and shall have Type 304 stainless steel fasteners.

3. Repair Clamps for Sealing of Existing Ductile Iron, HDPE, or Asbestos Cement (AC) Gravity Mains at Demolished Sewer Service Connections

Use of repair clamps is subject to acceptance by Doyon Utilities’ Authorized Representative on a case by case basis.

Where allowed, repair clamps, for closure of holes in ductile iron or AC pipe, shall be “Romac SS1, SS2, or SS3” or Doyon Utilities’ Authorized Representative accepted equals.

Where allowed, repair clamps, for closure of holes in HDPE pipe, shall be “Romac SS1-H, SS2-H, or SS3-H” or Doyon Utilities’ Authorized Representative accepted equals.

The minimum length of a repair clamp shall be as recommended by the clamp manufacturer for the type of sewer line (gravity line or force main), the maximum operating pressure or hydrotest pressure (for force mains only), and/or the size of the pipe wall penetration being sealed..



4. Detectable Underground Warning Tape

Detectable underground warning tape shall be 5 mil by 6 inch wide aluminum backed yellow tape with the words “Caution Buried Pipeline Below”. Detectable underground warning tape shall be “Seton” or Doyon Utilities’ Authorized Representative accepted equal.

5. Gravity Main Cleanout Frames and Covers

Gravity main cleanout frames and covers shall be in accordance with the Standard Details or Doyon Utilities Authorized Representative accepted equals. The word “Sewer” shall be cast into main cleanout covers.

6. Gravity Service Cleanout Access Structures

Gravity service cleanout access structures shall be in accordance with the Standard Details or Doyon Utilities Authorized Representative accepted equals. The word “Sewer” or the word “Cleanout” shall be cast into service line cleanout access covers.

7. Board Insulation Board insulation shall be provided in accordance with Division 20 – Earthwork.

E. Materials for Sewer Lines in Casings

1. Casing Spacers

Casing spacers, for installation of ductile iron gravity sewer or ductile iron sanitary sewer force main carrier pipe in casing pipe, shall be fabricated with Type 304 stainless steel bands, risers, and fasteners, minimum 2 inch wide HDPE runners, and 1/8 inch minimum thickness PVC liners. Casing spacer dimensions shall be such that carrier pipe centerline is within 2 inches vertical of the casing pipe centerline. Each casing spacer shall be designed and fabricated to support the weight of 10 feet of Class 52 ductile iron pipe of the required diameter, completely filled with water, with a minimum factor of safety of 2. Casing spacers shall also be designed for dynamic loads experienced during carrier pipe installation in casing. Casing spacers shall be “Calpico” or Doyon Utilities’ Authorized Representative accepted equal.

2. Casing End Seals

Casing end seals shall be as detailed on the Plans, as shown on the Standard Details, or as directed by Doyon Utilities’ Authorized Representative.

Casing end seals, as shown on the Standard Details, shall be fabricated of 3 inch by 4 inch by 8 inch concrete bricks, mortar, and 1/2 inch thick by 10 inch wide neoprene padding.

Mortar shall be composed of 1 part cement and 3 parts sand. Cement for mortar shall conform to the requirements of ASTM C150, Type II. Sand shall conform to the requirements of AASHTO M45. The addition of lime is not permitted. The use of 5 minute or fast-cure mortar is prohibited.



Article 50.02.3 - Construction A. Materials Delivery, Handling, and Temporary Storage

Pipe and appurtenances shall be delivered, unloaded, and handled and stored on the jobsite in such a manner to ensure placement in the trench in a sound, undamaged condition. Particular care shall be taken not to damage the pipe, fittings, or pipe or fitting coating or lining. Damaged pipe, fittings, coating, and/or lining shall be repaired to the satisfaction of Doyon Utilities’ Authorized Representative or pipe shall be replaced, all at Contractor expense.

On-site storage of pipe and other materials shall be to the satisfaction of Doyon Utilities’ Authorized Representative to avoid inconvenience to the military and the general public on JBER and/or to avoid potential safety hazards such as inadvertent shifting and rolling of pipe.

Rubber gaskets shall be protected from freezing temperatures and direct sunlight.

B. General Installation Requirements for All Wastewater Lines

Also see specific requirements below for installation of gravity mains, gravity services, force mains, and wastewater lines in casings.

1. Earthwork

All trenching, pipe bedding, backfilling, and related work shall be in accordance with Division 20 - Earthwork.

The Contractor shall remove and dispose of all sewage-saturated and otherwise contaminated soils encountered within the trench area to limits directed by Doyon Utilities’ Authorized Representative. Sewage-saturated and otherwise contaminated soils shall not be re-used as fill or backfill material anywhere on JBER, but shall be disposed of in accordance with Division 20 - Earthwork.

Wherever possible, as determined by Doyon Utilities’ Authorized Representative, gravity sewer mains and services shall be installed with 8 foot minimum earth cover from finished grade. If 8 foot minimum earth cover from finished grade is not feasible, gravity sewer mains and services shall be installed with 5 foot minimum earth cover from finished grade. All gravity sewer mains with less than 6 feet of earth cover shall be insulated. All gravity sewer services shall be insulated.

All force mains shall be constructed with a minimum of 10 feet of earth cover from finished grade.

2. Pipe Installation

All wastewater piping shall be installed in accordance with the Plans and the Standard Details, and to the satisfaction of Doyon Utilities’ Authorized Representative.

The interior of all pipe and accessories shall be thoroughly cleaned of foreign matter prior to installation to the satisfaction of Doyon Utilities’ Authorized Representative.

Cutting of pipe shall be done in a neat and workmanlike manner without damage to the pipe, coating, and/or lining to the satisfaction of Doyon Utilities’ Authorized Representative.



Pipe and appurtenances shall be carefully lowered into the trench by means of fabric slings, wire rope chokers, rope tag lines, and other suitable lifting and rigging gear. Pipe placement, including all handling, installing in the trench, bedding, and backfilling, shall be done to the satisfaction of Doyon Utilities’ Authorized Representative.

Where new wastewater piping ties into an existing in-service wastewater collection system, actual tie-in to the existing system shall be completed after all new upstream underground construction, alignment checking, inspection, cleaning and repair as necessary, and testing is complete and accepted by Doyon Utilities’ Authorized Representative. Care shall be exercised during construction, inspection, cleaning and repair as necessary, and testing operations to assure that no foreign debris is diverted into an existing in-service sanitary sewer system. When exposing an existing wastewater piping stub-out for connection of new wastewater piping to that stub-out, the Contractor shall ensure that the existing stub-out has the proper slope and alignment and is free and clear of obstructions prior to connection of the new piping to the existing stub-out. If the existing stub-out is found to be either misaligned or obstructed, the Contractor shall notify Doyon Utilities’ Authorized Representative immediately or shall be liable for correcting the misalignment and/or removing the obstruction at Contractor expense. Where new wastewater piping ties into an existing in-service wastewater collection system, all tie-in methods and materials shall be subject to acceptance by Doyon Utilities’ Authorized Representative. Tie-in work shall include thrust restraint of existing and new piping if and as appropriate and required to assure the integrity of the tie-in to the satisfaction of Doyon Utilities’ Authorized Representative. If tie-in components will not be air tested or hydrostatically tested after completion of a tie-in, and if the tie-in piping can be safely returned to service prior to backfilling, then tie-in components shall be visually inspected by the Contractor and Doyon Utilities’ Authorized Representative under normal operating conditions after tie-in work is complete but before polyethylene wrapping and/or backfill is/are placed. Any and all leaks shall be repaired at Contractor expense and to the satisfaction of Doyon Utilities’ Authorized Representative. When work is not in progress, open piping ends shall be securely plugged so that no trench water, earth or other substances will enter the piping. Pipe ends left for future connections shall be plugged, capped, or blind flanged, securely wrapped in polyethylene encasement, and restrained to the satisfaction of Doyon Utilities’ Authorized Representative. Ends of wastewater piping stubbed out for future use shall be permanently marked with new vertical 4 inch by 4 inch pressure treated wood posts set directly at the end of pipes. In non-traffic areas, the 4 inch by 4 -inch pressure treated wood posts shall extend at least one foot above finished grade, shall be painted green, and shall be permanently fitted with 3-inch diameter red plastic reflectors on all four sides. In vehicular and/or pedestrian traffic areas, the 4 inch by 4 inch pressure treated wood posts shall be cut off at a depth below grade as directed by Doyon Utilities’ Authorized Representative. All new wastewater piping shall be marked with detectable underground warning tape. The Contractor shall install detectable underground warning tape directly above and parallel to the axis of the wastewater piping with no breaks in continuity. The Contractor shall install the locator tape 3 feet below finished grade.



3. Repair or Replacement of Damaged Pipe or Accessories

Where pipe or other component structural integrity, mechanical integrity, coating, lining, and/or polyethylene encasement is/are damaged by the Contractor as determined by Doyon Utilities’ Authorized Representative, the damaged pipe or component shall be replaced if directed by Doyon Utilities’ Authorized Representative, or repaired if acceptable to Doyon Utilities’ Authorized Representative. All repair methods and materials shall be to the satisfaction of Doyon Utilities’ Authorized Representative. Use of repair clamps and similar devices shall not be permitted. Replacement or repair shall be at the Contractor’s expense.

C. Installation Requirements for Gravity Sewer Mains and Services

1. Installation Requirements for Ductile Iron and HDPE Gravity Sewer Lines

See Article 50.02.3, paragraphs A. and B. above for additional applicable requirements.

a. Depth of Bury

Whenever possible, as determined by Doyon Utilities’ Authorized Representative, gravity sewer mains and services shall be installed with 8 foot earth cover from finished grade.

If 8 foot earth cover from finished grade is not feasible, uninsulated gravity sewer mains may be installed with 6 foot minimum earth cover from finished grade, and insulated gravity sewer mains may be installed with 5 foot minimum earth cover from finished grade. See Article 50.02.3, subparagraph C.1.d below for specific insulation requirements.

If 8 foot earth cover from finished grade is not feasible, insulated gravity sewer services may be installed with 5 foot minimum earth cover from finished grade. All gravity sewer services shall be insulated.

b. Pipe Laying

Gravity sewer main and service pipe shall be laid true to line and grade and in such a manner as to form a close concentric joint with the adjoining pipe. Each section of pipe shall be handled carefully, placed accurately, and joined in accordance with the pipe manufacturer’s recommended standards. Each section of pipe shall be properly supported to ensure true alignment and an invert which is smooth and straight. When completed, the alignment of the installed pipe shall appear straight to visual observation and shall be such that a full circle of light can be seen between manholes, etc., when sighting along all points of the pipe interior circumference.

c. Service Connections

New gravity service connections to gravity sewer mains shall be spaced at least 3 feet apart.

Holes in gravity sewer main side walls, for connection of gravity sewer service saddles, shall be drilled with mechanical hole cutters acceptable to Doyon Utilities’ Authorized Representative. Gravity sewer main side wall drilled hole diameters shall be 1/8 inch larger that the service saddle hole



diameters. All gravity sewer main side wall drilled holes shall be completely located in the upper half of the main piping.

Service saddles shall be installed in strict accordance with saddle manufacturers’ recommendations and so that service saddle piping connection holes are positioned concentric to gravity sewer main side wall drilled holes.

d. Insulation of Gravity Mains and Services

Gravity sewer mains and services shall be insulated with board insulation as described below:

(i) All gravity sewer mains with less than 6 feet of earth cover from finished grade shall be insulated. Limits of gravity sewer main insulation shall include: to manhole walls, to 2 feet beyond end-of-line main cleanout 45o bends, and/or to points where earth cover depth exceeds 8 feet. Board insulation shall be 4 inches minimum thickness (at least two each 2 inch thick layers) by 4 foot minimum width, centered over the sewer main. The bottom of the insulation shall be 6 inches above the top of the sewer main. Board insulation shall be coped as necessary to fit snugly against manhole walls, around cleanout risers, etc., to the satisfaction of Doyon Utilities’ Authorized Representative.

(ii) All gravity sewer services shall be insulated. Limits of gravity sewer service insulation shall be from 2 feet beyond the main connection to 2 feet inside of the building footings. Board insulation shall be 4 inches minimum thickness (at least two each 2 inch thick layers) by 4 foot minimum width, centered over the sewer service. The bottom of the insulation shall be 6 inches above the top of the sewer service. Board insulation shall be coped as necessary to fit snugly around cleanout risers, etc., to the satisfaction of Doyon Utilities’ Authorized Representative.

(iii) At all gravity sewer/water line crossings (including sewer mains and services) where the out-to-out vertical separation at the crossing is less than 3 feet, a minimum of 4 inches thickness of board insulation (at least two each 2 inch thick layers) by 4 foot width by 8 foot length shall be installed between gravity sewer lines and water lines, as shown on the Plans, in accordance with the Standard Details, or as directed by Doyon Utilities’ Authorized Representative.

e. Air Testing of New Gravity Mains and Services

If a project includes new gravity sewer mains and new gravity sewer services connected to the new mains, new gravity services shall be completely installed before new gravity sewer main air testing, and new services shall be tested in the same air test as the new mains.

2. Additional Installation Requirements for Ductile Iron Gravity Mains and Services

See Article 50.02.3, paragraphs A. and B., and subparagraph C.1 above for additional applicable requirements.



a. Polyethylene Encasement

All ductile iron pipe and fittings shall be encased in polyethylene encasement. The polyethylene encasement shall be installed in strict conformance to the methods described in the most current editions of AWWA C105/ANSI A21.5 and the Ductile Iron Pipe Research Association's "A Guide for the Installation of Ductile Iron Pipe" and to the satisfaction of Doyon Utilities’ Authorized Representative. The Contractor shall use Method A of ANSI/AWWA C105/A21.5 to install polyethylene encasement.

Damage to polyethylene encasement, whether occurring before, during, or after pipe installation, shall be either repaired or the piping shall be removed and the polyethylene encasement replaced, all as directed by Doyon Utilities’ Authorized Representative. Repair and/or replacement of damaged polyethylene encasement shall be at Contractor expense.

Existing ductile iron piping exposed for tie-ins and similar activities shall be encased in polyethylene encasement to the satisfaction of Doyon Utilities’ Authorized Representative.

Main line and service cleanout risers shall be triple wrapped with polyethylene encasement to reduce the possibility of frost jacking damage.

b. Pipe Installation

Installation and joining of ductile iron pipe shall be in accordance with the requirements of AWWA C600. Ductile iron gravity sewer main and service pipe laying shall in all cases proceed by inserting the spigot end of the pipe being installed into the bell of the previously installed pipe. Each pipe shall be joined in accordance with the pipe manufacturer’s recommended standards. Each pipe shall be laid true to line and grade and in such a manner as to form a close concentric joint with the adjoining pipe. When completed, the alignment of the installed pipe shall appear straight to visual observation and shall be such that a full circle of light can be seen when sighting along all points of the pipe interior circumference.

c. Ductile Iron Pipe Bedding and Backfill

Unless called out otherwise on the Plans or directed otherwise by Doyon Utilities’ Authorized Representative, pipe bedding for ductile iron piping shall meet the requirements of Class “B” bedding per Division 20 - Earthwork.

Bedding and backfill of ductile iron piping with polyethylene encasement shall be placed and compacted with sufficient care to protect the polyethylene encasement from becoming torn, punctured, or otherwise damaged.



d. New Gravity Sewer Drop Connections at Manholes

Gravity drop connections at manholes shall be constructed in accordance with the Plans, the Standard Details, and to the satisfaction of Doyon Utilities’ Authorized Representative.

e. New Gravity Sewer Main Cleanouts

Gravity sewer main cleanouts shall be constructed in accordance with the Plans, the Standard Details, and to the satisfaction of Doyon Utilities’ Authorized Representative. Gravity sewer main cleanouts shall be installed only at the upstream ends of gravity sewer systems. The maximum distance from the cleanout cover centerline to the centerline of the first downstream manhole shall not exceed 150 feet.

f. New Gravity Sewer Service Connections to New or Existing Ductile Iron or HDPE Gravity Mains or Existing AC Mains

New gravity sewer service connections to new or existing ductile iron or HDPE gravity mains or existing AC gravity mains shall be constructed in accordance with the Plans, the Standard Details, and to the satisfaction of Doyon Utilities’ Authorized Representative.

The Contractor shall install sewer services perpendicular to the street centerline whenever possible.

g. New Gravity Sewer Service Connections at Deep Sewer Risers

Deep service risers shall be constructed in accordance with the Plans, the Standard Details, and to the satisfaction of Doyon Utilities’ Authorized Representative. Deep service risers shall be installed where gravity mains are in excess of 12 feet deep. Deep service riser piping shall be fully restrained from the riser-main connection to at least three full horizontal service line piping joints upstream of the riser. No more than two sanitary sewer service connections shall be installed on a single deep service riser.

Deep service risers on existing gravity mains shall be constructed by hot tapping of mains. Supervisory personnel, for hot tapping shall have a minimum of 5 years of experience in hot tapping of sewer mains.

The Contractor shall submit procedures and supervisory personnel resume(s) for hot tapping, for review and acceptance by Doyon Utilities’ Authorized Representative. No hot tapping shall commence until Doyon Utilities’ Authorized Representative written acceptance of Contractor procedures and supervisory personnel resume(s) is provided. Hot tapping procedures that have been accepted by Doyon Utilities’ Authorized Representative shall be strictly followed in the field. All hot tapping operations shall at all times be prudently conducted to ensure sanitation and uninterrupted service of “live” sewer lines.

h. New Ductile Iron Gravity Service Connections to Existing Portland Cement Concrete Gravity Mains

Prior to beginning of connection of a new gravity sewer service to an existing Portland cement concrete gravity sewer main, the Contractor



shall positively verify the outside diameter of the existing sewer main to the satisfaction of Doyon Utilities’ Authorized Representative. Transition couplings, as needed to install a new section of ductile iron pipe in the existing main, shall be provided based on actual outside diameter of the existing main, and shall be on site before proceeding with new sewer service connection.

If required in the Contract Documents or directed by Doyon Utilities’ Authorized Representative, sewage shall be bypassed as necessary and portable toilets shall be provided and maintained during new sewer service connection to an existing Portland cement concrete sewer main in accordance with Section 50.06 – Sanitary Sewage Bypass Pumping.

A section of the existing Portland cement concrete main directed Doyon Utilities’ Authorized Representative shall be very carefully excavated and removed, while protecting the ends of existing concrete pipe to remain. A section of Class 52 ductile iron plain end pipe section, with inside diameter closely matching the inside diameter of existing Portland cement concrete gravity sewer main pipe to the satisfaction of Doyon Utilities’ Authorized Representative, shall be installed in place of removed Portland cement concrete piping, using two “Romac RC501” or Doyon Utilities’ Authorized Representative equal transition couplings. Transition couplings shall be installed in strict accordance with coupling manufacturer’s recommendations. Transition couplings shall be visually inspected for leakage by Doyon Utilities’ Authorized Representative under normal line flow, and any leakage shall be repaired to the satisfaction of Doyon Utilities’ Authorized Representative, all prior to backfilling.

Connections of new sewer services to new sections of ductile iron pipe installed in the existing Portland cement concrete gravity sewer mains shall be made with “Romac Style CB” sewer saddles or Doyon Utilities’ Authorized Representative accepted equals.

i. Gravity Sewer Service Cleanouts

Gravity sewer service cleanouts shall be constructed in accordance with the Plans, the Standard Details, and to the satisfaction of Doyon Utilities’ Authorized Representative. Cleanouts shall be installed within five feet of buildings served, at grade breaks, immediately upstream of all horizontal and/or vertical bends except the vertical bend at the main connection, and at 150 feet maximum intervals in straight sections of gravity service piping.

3. Additional Installation Requirements for HDPE Gravity Mains

See Article 50.02, subparagraphs 3.A, 3.B, and 3.C.1 above for additional applicable requirements.

a. Inspection of Pipe

The Contractor shall inspect HDPE piping for damage just prior to joining. Damage includes cuts or gouges exceeding 10% of the pipe wall thickness, kinked pipe, pipe flattened by more than 5% of round pipe diameter, or any abrasion, cuts, gouges, or other damage on the pipe



interior. Damaged pipe shall be cut out and discarded at Contractor expense.

b. Pipe Cleaning Prior to Fusion

HDPE pipe ends and walls shall cleaned just prior to fusion to the satisfaction of Doyon Utilities’ Authorized Representative. Only 99% isopropyl alcohol shall be used for HDPE cleaning just prior to fusion. Water, denatured alcohol, acetone, or other solvents are prohibited for HDPE pipe cleaning. No liquid of any kind shall be applied to butt fusion pipe ends after mechanical facing. Fusion surfaces shall be protected from precipitation and moisture of any kind, and shall be completely dry just prior to fusion.

c. Butt Fusion Joining and Interior Bead Removal

All HDPE pipe and fitting joint butt fusion shall conform to ASTM F2620 and the pipe manufacturer's recommendations for proper equipment and procedures. The Contractor’s lead technician for butt fusion shall provide documentation of successful completion of an 8 hour minimum certification course in HDPE piping butt fusion and a resume describing the lead person’s HDPE piping butt fusion project experience, all for review and acceptance by Doyon Utilities’ Authorized Representative. The HDPE pipe supplier shall supply a qualified representative acceptable to Doyon Utilities’ Authorized Representative to instruct the Contractor's personnel on butt fusion, and to witness the first 20 butt fusion joints.

Butt fused HDPE piping shall be reamed after butt fusion in the presence of and to the satisfaction of Doyon Utilities’ Authorized Representative to remove butt fusion interior weld beads so as to produce a uniform interior surface that is flush with the pipe interior to the satisfaction of Doyon Utilities’ Authorized Representative.

The Contractor shall assure that butt fusion joints are fused at the temperature and pressure and for the duration recommended by the pipe manufacturer in order to achieve maximum pressure ratings of all joints. Joints that are not fused in accordance with pipe manufacturer’s recommendations and to the satisfaction of Doyon Utilities’ Authorized Representative shall be cut out and replaced at Contractor expense.

Up to 3 completed butt fusion joints per 1,000 feet of piping may be selected at random by Doyon Utilities’ Authorized Representative for quality assurance testing for compliance with ASTM D638. Test specimens shall be cut out at Contractor expense and shall include the selected butt fusion joint and piping on 12 inches minimum on either side of the joint. After test specimen removal, remaining piping shall be rejoined at Contractor expense. For each joint that fails compliance testing in accordance with ASTM D638, 2 additional joints shall be cut out for testing, and piping shall be rejoined, all at Contractor expense.

d. Electro-Fusion Joining

All HDPE coupling and fitting electro-fusion shall conform to the electro-fusion coupling and fitting manufacturer's recommendations for proper



equipment and procedures. The electro-fusion coupling and fitting supplier shall supply a qualified representative acceptable to Doyon Utilities’ Authorized Representative to instruct the Contractor's personnel on electro-fusion, and to witness the first 20 electro-fusion joints. Exact locations of all buried electro-fusion joints shall be noted on red-lined drawings, including stations, offsets, and GPS coordinates.

e. Pipe Installation

Joined HDPE pipe shall be handled using fabric straps or rubber covered wire rope chokers. Pick points shall be separated to the satisfaction of Doyon Utilities’ Authorized Representative, and shall be at least 5 feet from any piping joints.

The temporary bending radius during handling shall not be less than the minimum radius recommended by the pipe manufacturer.

Due to the flexibility of the HDPE, the Contractor shall exert due care while placing bedding and trench backfill and compacting adjacent to and over HDPE pipe. All placement and compaction of bedding and trench backfill shall be per the manufacturer's recommendations and to the satisfaction of Doyon Utilities’ Authorized Representative.

All new HDPE gravity main sections shall be extend from manhole to manhole.

f. HDPE Pipe Bedding

Unless called out otherwise on the Plans or directed otherwise by Doyon Utilities’ Authorized Representative, pipe bedding for HDPE pipe shall be Class “B” or Class “D” bedding per Division 20 - Earthwork. Class “B” bedding shall be required at all sewer/water crossings in accordance with the Standard Details and Article 50.02.3, paragraph G. below.

D. Installation Requirements for Force Mains

1. Installation Requirements for Ductile Iron and Copper Force Mains


a. Depth of Bury

All force mains shall be buried 10 feet minimum below finished grade.

b. High Point Vents

If possible, force mains shall be installed without high points in the profile that could permanently trap air.

When a high point is located in a force main profile such that, in the judgment of Doyon Utilities’ Authorized Representative, air cannot be purged by normal wastewater flow in the force main, then the force main shall be constructed with a permanent vent in accordance with Section 50.05 - Force Main Permanent Vents.



c. Insulation of Force Mains

All force mains shall be insulated with board insulation 4 inches thick (two each 2 inch thick layers) by 4 foot minimum width, centered over the force main and extending the full length of the force main as follows:

(i) Ductile iron force mains shall be insulated from the lift station outside wall to the outside wall of the manhole where the force main discharges.

(ii) Copper force mains shall be insulated from the lift station outside wall to at least 2 feet beyond the point of discharge from the force main.

The bottom of the insulation shall be 6 inches above the top of the force main. Board insulation shall be coped as necessary to fit snugly against lift station and manhole exterior walls, around high point vent piping, etc., to the satisfaction of Doyon Utilities’ Authorized Representative.

2. Additional Installation Requirements for Ductile Iron Force Mains

See Article 50.02.3, paragraphs A. and B., and subparagraph D.1 above for additional applicable requirements.

a. Polyethylene Encasement

All ductile iron pipe and fittings shall be encased in one layer of polyethylene encasement. The polyethylene encasement shall be installed in strict conformance to the methods described in the most current editions of AWWA C105/ANSI A21.5 and the Ductile Iron Pipe Research Association's "A Guide for the Installation of Ductile Iron Pipe" and to the satisfaction of Doyon Utilities’ Authorized Representative. The Contractor shall use Method A of ANSI/AWWA C105/A21.5 to install polyethylene encasement.

Existing ductile iron piping exposed for tie-ins and similar activities shall be encased in polyethylene encasement to the satisfaction of Doyon Utilities’ Authorized Representative.

Damage to polyethylene encasement, whether occurring before, during, or after pipe installation, shall be either repaired or the piping shall be removed and the polyethylene encasement replaced, all as directed by Doyon Utilities’ Authorized Representative. Repair and/or replacement of damaged polyethylene encasement shall be at Contractor expense.

b. Force Main Pipe Installation

Installation and joining of ductile iron pipe shall be in accordance with the requirements of AWWA C600. Ductile iron force main pipe laying shall in all cases proceed by inserting the spigot end of the pipe being installed into the bell of the previously installed pipe. Each pipe shall be joined in accordance with the pipe manufacturer’s recommended standards. Each pipe shall be laid true to line and grade.

When any ductile iron pipe push-on joints must be deflected horizontally and/or vertically to maintain the required alignment and/or grade, the



actual total deflection at each joint shall not exceed two-thirds of the maximum joint deflection recommended by the pipe manufacturer. When ductile iron pipe push-on joints with field lock gaskets must be deflected to maintain the required alignment and/or grade, the pipe manufacturer’s recommended procedures for joint assembly and deflection shall be strictly followed to the satisfaction of Doyon Utilities’ Authorized Representative.

c. Ductile Iron Force Main Bedding and Backfill

Unless called out otherwise on the Plans or Standard Details, specified otherwise herein, or directed otherwise by Doyon Utilities’ Authorized Representative, pipe bedding for ductile iron force main piping shall meet the requirements of Class “B” bedding per Division 20 - Earthwork.

Bedding and backfill of ductile iron piping with polyethylene encasement shall be placed and compacted with sufficient care to protect the polyethylene encasement from becoming torn, punctured, or otherwise damaged.

d. Thrust Restraint

Thrust restraint for ductile iron pipe shall be provided by restrained pipe joints, thrust blocks, or a combination of both. Wherever possible, restrained pipe joints shall be used for thrust restraint in lieu of thrust blocks. Use of thrust blocks shall only be allowed when transitioning from existing unrestrained piping to new piping or at other locations where specifically shown on the Plans or directed by Doyon Utilities’ Authorized Representative.

Ductile iron pipe joint thrust restraint components for force mains, including mechanical joint restraining glands and field lock gaskets, shall be installed in strict accordance with manufacturers’ recommended procedures and to the satisfaction of Doyon Utilities’ Authorized Representative. Joint thrust restraints shall be installed as required where a new force main terminates, or changes alignment at bend or similar fitting. Lengths of restrained joint piping sections shall be as shown on the Plans or as directed by Doyon Utilities’ Authorized Representative.

As applicable, tie-in work shall include thrust restraint of existing pipe as required to assure the integrity of the tie-in to the satisfaction of Doyon Utilities’ Authorized Representative.

e. Continuity Straps and Test Leads

Two parallel electrical continuity straps shall be exothermically welded to ductile iron force main piping on both sides of every joint to provide redundant electrical continuity paths across the joint.

At intervals on ductile iron force mains not to exceed 500 feet in length, sets of two parallel electrical continuity test leads shall be installed. Test lead sets shall be located so that the entire force main can be continuity tested. All test leads shall be brought to from the pipe to finished grade and permanently stored in “Sewer” valve boxes or standard cast iron



valve box top sections with “Sewer” covers at all locations directed by Doyon Utilities’ Authorized Representative. Test leads shall extend 1 foot minimum above finished grade to provide accessibility for future use.

Continuity straps and test leads shall be exothermically welded to a clean, dry, freshly ground bright ductile iron pipe surface. Weld quality shall be subject to acceptance by Doyon Utilities’ Authorized Representative. All welds shall be protected with thermite weld caps, “Royston Handy Cap IP” or Doyon Utilities’ Authorized Representative accepted equal, and remaining exposed bare metal surfaces shall be coated with coal tar pitch or other suitable coating, all to the satisfaction of Doyon Utilities’ Authorized Representative.

f. Connection to Wastewater Collection Systems

Unless shown otherwise on the Plans or directed otherwise by Doyon Utilities’ Authorized Representative, ductile iron force mains shall connect to wastewater collection systems at gravity sewer manholes. Connections at manholes shall be constructed to the satisfaction of Doyon Utilities’ Authorized Representative to avoid splashing and solids accumulation.

3. Additional Installation Requirements for Copper Tubing Force Mains See Article 50.02.3, paragraphs A. and B., and subparagraph D.1 above for additional applicable requirements.

a. Copper Tubing Installation

Copper tubing shall be installed without kinking or other damage, and to the satisfaction of Doyon Utilities’ Authorized Representative. Kinked or otherwise damaged copper tubing, as determined by Doyon Utilities’ Authorized Representative, shall be discarded and replaced at Contractor expense.

Wherever possible, copper force mains shall be installed in continuous sections with no buried joints except at tie-in connections to lift stations and to gravity sewer systems as shown on the Standard Details. If required, underground joints in copper tubing shall be flare connections. Underground soldered joints and/or unions shall not be permitted.

b. Copper Tubing Bedding

Unless called out otherwise on the Plans or Standard Details, specified otherwise herein, or directed otherwise by Doyon Utilities’ Authorized Representative, pipe bedding for copper tubing shall meet the requirements of Class “B” bedding per Division 20 - Earthwork.

c. Copper Tubing Force Main Tie-Ins

Copper tubing force mains shall be tied into gravity sewer systems in accordance with the Plans, the Standard Details, and to the satisfaction of Doyon Utilities’ Authorized Representative.



d. Copper Tubing Thaw Wires

#2 stranded copper thaw wires shall be installed at both ends of copper force mains to the satisfaction of Doyon Utilities’ Authorized Representative. Thaw wires shall be stored in cleanout access structures or cast iron valve box top sections with “Sewer” covers. Thaw wires shall be of lengths to extend one foot minimum above finished grade to provide accessibility for future use.

E. Installation Requirements for Ductile Iron Gravity Sewer Mains, Gravity Services, and Force Mains in Casings


1. Casing Pipe, Vent, and Placard Installation

Casing pipe, vents, and placards shall be installed in accordance with Division 20 – Earthwork and the Standard Details.

2. Carrier Pipe Installation

All wastewater carrier pipe installed in casing shall be ductile iron and shall be installed on casing spacers in strict accordance with casing spacer and pipe manufacturers’ recommendations, and with the Standard Details as applicable. Casing spacers shall be installed as follows as a minimum:

a. At least three casing spacers per full ductile iron pipe section.

b. At least two casing spacers per partial ductile iron pipe section.

c. 8 foot maximum center-to-center separation between casing spacers.

d. One casing spacer at 1 foot 6 inches clear from each end of the casing.

e. One casing spacer at 1 foot 0 inches clear on either side of each pipe joint in the casing.

3. Continuity Straps on Carrier Pipe in Casing Two parallel electrical continuity straps shall be installed at each ductile iron force main pipe joint inside of a casing in accordance with Article 50.03, subparagraph D.2.e above.

4. Installation of Casing End Seals End seals shall be installed to close the annular spaces between gravity sewer line or force main carrier pipe and the casing pipe, and shall be as shown on the Plans, in accordance with the Standard Details, or as directed by Doyon Utilities’ Authorized Representative. As a minimum, casing end seals shall be constructed as follows: a. The carrier pipe shall be tightly and securely wrapped with a double wrap

of 1/2 inch thick by 10 inch wide neoprene padding or Doyon Utilities’ Authorized Representative accepted equal, so that the wrap extends one inch beyond the end of the casing.

b. A concrete-brick-and-mortar bulkhead shall be constructed in the annular space between the carrier pipe and casing pipe. The long dimensions of concrete bricks shall be laid parallel with the axis of the carrier pipe and casing pipe, with outer ends of bricks flush with the outer end of the casing.



c. Completed casing end seals shall be allowed to cure for a minimum of 48 hours prior to backfilling, during which time the seals shall be protected from all damage to the satisfaction of Doyon Utilities’ Authorized Representative.

d. After a minimum of 48 hours of curing, casing end seals shall be carefully backfilled to the satisfaction of Doyon Utilities’ Authorized Representative.

F. Wastewater Facility Separation Requirements from Public Water Systems and Water Lines

All gravity sewer mains and services, manholes, clean-outs, wastewater force mains, vents, lift stations, and other appurtenances shall be constructed to meet all separation requirements of 18 AAC 80.020, or the following requirements, whichever are more stringent:

1. Gravity sewer mains and services, manholes, clean-outs, force mains, vents, lift stations, and other appurtenances shall be installed at least 10 feet horizontal out-to-out from parallel water lines (including but not limited to water mains, fire hydrant assemblies, fire lines, and water services).

2. Wastewater piping at water line crossings shall be installed such that no wastewater piping joints are located less than 9 feet horizontal from the centerline of the water line at the point of intersection of wastewater/water horizontal alignments.

3. Where wastewater piping lines cross water lines, the vertical separation between the wastewater piping and water lines shall be 18 inches minimum out-to-out between exterior pipe surfaces.

4. At crossings, wastewater piping within 10 feet of water line crossings, and existing water lines exposed at sanitary sewer crossings, shall all be bedded from 6 inches below to 6 inches above and 2 feet minimum on either side of each line with Class “B” pipe bedding material in accordance with Division 20 – Earthwork and the Standard Details.

If applicable, also see 18 AAC 80.020 for requirements prohibiting construction of wastewater facilities within protective radiuses around water wells.

G. Sewer Piping Alignment and Grade

1. General

The Contractor shall employ qualified persons for controlling pipe alignment and grade, and shall use standard survey instruments such as transits, engineer’s levels, electronic total stations, GPS surveying equipment, and laser devices, all in good repair and calibration, for controlling line and grade. The Contractor shall record line and grade measurements in standard survey field books for each installed pipe and appurtenance, and shall promptly provide copies of notes to Doyon Utilities’ Authorized Representative upon request. Line and grade personnel, survey instruments, procedures, and survey notes shall be in accordance with Division 65 - JBER Construction Surveys, and to the satisfaction of Doyon Utilities’ Authorized Representative.

The practice of placing backfill over a section of pipe to provide a pad for transit and level alignment and grade observations shall be subject to the approval of Doyon



Utilities’ Authorized Representative. If such intermittent backfilling is allowed, backfill shall meet the typical trench section requirements of the Standard Details, shall be compacted in lifts to 95% minimum to the satisfaction of Doyon Utilities’ Authorized Representative, and shall otherwise be provided in strict accordance with Division 20 - Earthwork.

At a sufficient distance, prior to encountering a known obstacle or tie-in to an existing pipe, the Contractor shall expose and verify the exact location of the obstacle or tie-in point so that proper alignment and/or grade may be determined before the pipe sections are laid in the trench and backfilled.

2. Minimum Depth of Earth Cover Over Sewer Lines

a. Gravity Mains and Services

Whenever possible, as determined by Doyon Utilities’ Authorized Representative, gravity sewer mains and services shall be installed with 8 foot earth cover from finished grade.

If 8 foot earth cover from finished grade is not feasible, uninsulated gravity sewer mains may be installed with 6 foot minimum earth cover from finished grade, and insulated gravity sewer mains may be installed with 5 foot minimum earth cover from finished grade.

If 8 foot earth cover from finished grade is not feasible, insulated gravity sewer services may be installed with 5 foot minimum earth cover from finished grade. All gravity sewer services shall be insulated.

See insulation requirements in Article 50.02.3, subparagraph C.1.d above for gravity sewer mains and services.

b. Force Mains

All force mains shall be constructed with a minimum of 10 feet of earth cover from proposed finished grade.

See insulation requirements in Article 50.02.3, subparagraph D.1.c above for all force mains.

3. Gravity Sewer Main and Gravity Service Line Alignment and Grade Tolerances

Minimum slopes for gravity sewer mains and service lines shall be as follows: Gravity Sewer Main and Service Line Minimum Slopes Pipe Diameter Slope

4" ............................ 2.08% (0.0208 feet per foot) 6" ............................ 1.00% (0.0100 feet per foot) 8" ............................ 0.40% (0.0040 feet per foot) 10" ........................... 0.28% (0.0028 feet per foot) 12" ........................... 0.22% (0.0022 feet per foot) 14" ........................... 0.17% (0.0017 feet per foot) 16" ........................... 0.14% (0.0014 feet per foot) 20" ........................... 0.10% (0.0010 feet per foot) 24" ........................... 0.08% (0.0008 feet per foot)



The Contractor shall install gravity main and gravity service piping so that after a line is completed, the pipe conforms accurately to the grades and alignments shown on the Plans. Variance of individual pipe sections from established line and grade shall not be greater than those listed in the table below, providing that such variance does not result in slopes flatter than the minimum slopes listed above, reverse sloping inverts, or sags.

Gravity Sewer Main and Service Line Bottom-of-Pipe Elevation Tolerances

Diameter Tolerance (Inches) (Feet) 4 ............................. 0.02 6 ............................. 0.02 8 ............................. 0.03 10 ............................ 0.03 12 ............................ 0.03 14 ............................ 0.04 16 ............................ 0.04 20 ............................ 0.05 24 ............................ 0.05

4. Force Main Alignment and Grade Tolerances

The Contractor shall lay the pipe in the trench so that it conforms accurately to the grades and alignments shown on the Plans. A maximum 0.2 foot deviation from design elevation and alignment will be allowed. In tangent sections, the pipe shall be generally straight to visual observation as determined by Doyon Utilities’ Authorized Representative.

Pipe joint deflection from a straight line or grade at any ductile iron push-on joint, as necessary to meet horizontal and/or vertical curve radius requirements or grade break requirements, shall not exceed two-thirds of the manufacturer's maximum recommended deflection. If the required radius of curvature cannot be accomplished using standard pipe lengths and joint deflections of not more than two-thirds of the manufacturer's maximum recommended deflection, then the Contractor shall furnish bend fittings or shorter lengths of pipe to meet the specified horizontal radius or profile grade break while maintaining joint angular deflections within the limits allowable.

H. Red-Lining

The Contractor shall obtain accurate as-built elevations, stationing and offsets as applicable, and GPS coordinates at all pipe inverts at manholes, pipe inverts at gravity main clean-out 45° bends, gravity main clean-out covers, pipe inverts at buried gravity main stub-out ends, pipe inverts at gravity service line connections to gravity main piping, pipe inverts at buried gravity service line stub-out ends, pipe inverts at gravity service line alignment changes, pipe inverts at gravity service line clean-out 45° wyes, gravity service line clean-out covers, pipe inverts at points where gravity service lines enter buildings, pipe inverts at force main bends, pipe inverts at force main points of curvature and tangency, pipe inverts at even 50 foot and 100 foot stations in horizontal curves in force main piping, HDPE electro-fusion coupling locations, and other locations requested by Doyon Utilities’ Authorized Representative, and record these elevations,



applicable stations and offsets, and coordinates on red-line drawings in accordance with Division 65 - JBER Construction Surveys.

Article 50.02.4 - Inspection, Cleaning, Repair as Required, and Testing A. Requirements for All Inspection, Cleaning and Repair as Required, and Testing

The Contractor shall furnish all equipment, supplies, and personnel for all closed circuit television (CCTV) or visual inspection of gravity sewer mains, gravity sewer main cleaning and repair as required, and testing. All inspection, cleaning, repair as necessary, and testing equipment, supplies, and personnel shall be satisfactory to Doyon Utilities’ Authorized Representative.

All inspections and tests for acceptance by Doyon Utilities’ Authorized Representative shall be made after the piping to be inspected and tested has been completely constructed, including backfill and compaction to finished grade. Temporary exception shall be made regarding backfill to finish grade at temporary test copper connection points on force mains.

All inspection and testing for acceptance must be witnessed by Doyon Utilities’ Authorized Representative.

B. General Sequence of Inspection, Cleaning and Repair, and Testing Activities

Inspection, cleaning and repair, testing, and related activities shall be completed in the following order:

1. Closed circuit television (CCTV) or visual inspection of new gravity sewer mains.

2. Cleaning and repair of new gravity sewer mains as necessary.

3. Air testing of all new gravity sewer mains and services.

4. Hydrostatic testing of all new ductile iron and copper force mains.

5. Test copper removal, and backfilling to finished grade.

6. Continuity testing of new ductile iron force mains.

Detailed inspection, cleaning and repair, testing, and related requirements are as follows.

C. Closed Circuit Television (CCTV) Inspection of Gravity Sewer Mains

New gravity sewer mains shall be inspected by closed circuit television (CCTV) after completion of trench backfill and finished grading but prior to the placement of pavement or permanent resurfacing, to determine the existence and extent of any infiltration, obstructions, structural deficiencies, unacceptable deviations from design line and grade, debris, and other objectionable conditions.

If directed by Doyon Utilities’ Authorized Representative a sufficient volume of water shall be discharged by the Contractor into gravity sewer mains prior to CCTV inspection to allow identification of sags in lines.

Televising equipment shall include the television camera with audio recording capability, television monitor, cables, power source, lights and other equipment necessary for CCTV inspection. The camera, television monitor and other components of the video system shall be capable of producing a minimum 350 line resolution color video picture.



Video shall be recorded to DVDs with high quality color in a format reviewable by Doyon Utilities’ Authorized Representative.

The CCTV inspection camera shall be specifically designed and constructed for wet underground piping inspection at 100% humidity conditions. Focal distance shall be adjustable through a range of from one inch to infinity. Lighting for the camera shall minimize reflective glare. Camera and lighting quality shall be suitable to provide a clear, continuously in-focus picture of the entire inside periphery of gravity sewer mains for all conditions encountered during the CCTV inspection. The camera shall be capable of 360° scanning of pipe joints.

The camera shall be self-propelled or mounted on skids suitably sized for each pipe diameter to be investigated. The remote reading distance measuring device acceptable to Doyon Utilities’ Authorized Representative shall be provided. The distance measuring device shall be accurate to within 0.5% over measured distance of the particular section being inspected, and distance readings shall be displayed on the television monitor and continuously recorded on video data. The distance measuring device shall be calibrated just prior to start of CCTV inspection, and daily thereafter, in the presence of Doyon Utilities’ Authorized Representative. Manual distance measuring methods shall not be acceptable.

The equipment shall be capable of CCTV inspection of the entire lengths of individual piping runs in one direction from each manhole to the next manhole or clean-out. If, during CCTV inspection, the television camera will not pass through a manhole structure, the Contractor shall reset the equipment as necessary to complete the CCTV inspection to the satisfaction of Doyon Utilities’ Authorized Representative.

The Contractor shall provide Doyon Utilities’ Authorized Representative notice 7 calendar days in advance of the date of CCTV inspection or re-inspection as necessary.

The Contractor’s video operator and crew shall be competent to the satisfaction of Doyon Utilities’ Authorized Representative. The video operator shall supplement the video recording with recorded real time audio commentary on the inspection.

The camera shall be moved through gravity sewer mains at a uniform rate, stopping and providing a complete inspection at each branch connection, at every observed defect, and a 360° inspection of each pipe joint, to ensure thorough inspection and proper documentation. The television camera shall be pulled at a maximum speed of less than 30 feet per minute. Manual winches, power winches, TV cable and powered rewinds, and/or other devices that are used to move the camera through gravity sewer mains shall not obstruct the camera view or adversely affect proper inspection or documentation of conditions.

Whenever non-remote powered and controlled winches are used to pull a television camera through the line, telephones, radios, or other suitable means of communication shall be set up between the manholes to ensure that adequate communications exist between members of the crew.

The Contractor shall turn over the original video/audio recordings in DVD format and supplementary written reports to Doyon Utilities’ Authorized Representative daily immediately after completion of CCTV inspection or re-inspection for that day. DVDs shall be labeled with the date of inspection or re-inspection, location(s) covered by the inspection or re-inspection, and other descriptive information. See the table below for video, audio, and written reporting requirements.



CCTV Inspection or Re-Inspection Reporting Item Description Video Audio Written Report No. (including DVD number(s)). X X X Date of CCTV inspection. X X X Location, size, type, and length of pipe. X X X Upstream and downstream manhole numbers. X X X Direction of CCTV inspection ("From" manhole "To" manhole).

X X X

Tape counter footage (current distance along reach). X X Beginning & End

Description and location of each defect. X X Description and location of each connection. X X Current weather conditions. X GPS coordinate locations for upstream and downstream manholes. GPS receivers shall provide sub-meter accuracy.

X

Sketch showing the street and cross streets where the CCTV inspection was made. X

Doyon Utilities’ Authorized Representative shall be allowed 7 calendar days to review each individual DVD and written report of each and every gravity sewer main that is CCTV inspected or re-inspected on any given day. Video recordings that are out of focus shall be cause for rejection and the lines covered by these out-of-focus videos shall be re-inspected at Contractor expense.

D. Visual Inspection of Gravity Sewer Mains

At the option of Doyon Utilities’ Authorized Representative, new gravity sewer mains extending from manhole to manhole may be inspected by direct visual inspection in lieu of CCTV inspection. For direct visual inspection, a full circle of light must be seen at the top, bottom, and right and left springline of the pipe by Doyon Utilities’ Authorized Representative when a bright light is shined from the next new manhole to the new manhole occupied by Doyon Utilities’ Authorized Representative. Direct visual inspection shall be conducted from each end of each new section of gravity sewer main that is visually inspected.

E. Stopping of Infiltration, Removal of Obstructions and Debris, and Correction of Other Defects

Prior to proceeding with testing activities specified below, the Contractor shall complete any or all of the following tasks to the satisfaction of Doyon Utilities’ Authorized Representative;

1. Any infiltration of groundwater detected by CCTV inspection or by visual inspection, either directly into sewer mains or from sewer services, shall be stopped by the Contractor.



2. Any obstruction and/or debris detected by CCTV inspection or by visual inspection shall be removed by the Contractor.

3. Any other unacceptable defects detected by CCTV inspection or by visual inspection, including but not limited to unacceptable deviations from line and/or grade and structural damage, shall be corrected by the Contractor.

Debris from cleaning of new gravity sewer mains shall be strictly prevented from entering existing in-service sanitary sewer systems, and shall be disposed of by the Contractor at a location directed by Doyon Utilities’ Authorized Representative. All cleaning shall be to the satisfaction of Doyon Utilities’ Authorized Representative and at Contractor expense.

All defects in new gravity sewer mains and services, including but not limited to infiltration, unacceptable deviations from line and/or grade, and structural damage, shall be corrected to the satisfaction of Doyon Utilities’ Authorized Representative and at Contractor expense.

When all infiltration has been stopped, any obstruction and/or debris has been removed, and all other defects have been corrected to the satisfaction of Doyon Utilities’ Authorized Representative, the affected line section(s) shall be re-inspected by CCTV inspection or by visual inspection until the line is free of infiltration, obstructions, debris, and defects, all to the satisfaction of Doyon Utilities’ Authorized Representative, and all at Contractor expense.

F. Gravity Main and Service Air Testing

All gravity main and connected gravity services in each main section to be tested shall be suitably capped or plugged for testing. Safety braces shall be required to hold caps and/or plugs in place to prevent the sudden release of plugs and/or caps. For safety reasons, workers shall not be allowed in areas where caps or plugs have been placed while lines are under air pressure. The Contractor's testing equipment shall be arranged in such a manner that a pressure relief device will prohibit the pressure in the pipeline from exceeding 10 PSI.

Air shall be slowly supplied to the plugged gravity sewer system section until the internal air pressure reaches the test pressure of 4 PSI plus the head pressure of any ground water in contact with the pipe, as determined by Doyon Utilities’ Authorized Representative. At least 2 minutes shall be allowed for temperature stabilization before proceeding with the actual test. The test shall be maintained for 10 minutes, during which time the pressure drop shall not exceed the values shown in the table below for various pipe diameters.

Allowable Gravity Main and Service Air Testing Pressure Drops Main Diameter Allowable Pressure Drop (Inches) in 10 Minutes

8 ................................................... 2.7 PSI 10 .................................................. 2.1 PSI 12 .................................................. 1.8 PSI 14 .................................................. 1.5 PSI 16 .................................................. 1.3 PSI 20 .................................................. 1.1 PSI 24 .................................................. 0.9 PSI



Pressure gauges shall be incremented 0.1 PSI increments for accurate testing.

G. Ductile Iron and Copper Tubing Force Main Hydrostatic Testing

Ductile iron and copper tubing force mains shall be hydrostatically tested with potable water at a constant pressure of 150 PSI minimum with no detectable pressure drop for a duration of 30 minutes. If necessary because of topography, force main profile, and test pump location, the hydrostatic test pressure shall be increased as directed by Doyon Utilities’ Authorized Representative to assure that the entire force main is exposed to a test pressure of at least 150 PSI. After the required test pressure has been reached, pumping will be terminated. If the pressure remains constant for 30 minutes without additional pumping, the test shall be considered satisfactory by Doyon Utilities' Authorized Representative.

Any water line leakage detected during hydrostatic testing shall be located and repaired at Contractor expense to the satisfaction of Doyon Utilities’ Authorized Representative.

At the end of a successful hydrostatic test, pressure shall be released at a force main location remote from the test pump connection to prove the integrity of the hydrostatic test.

H. Test Copper and Other Temporary Piping Removal

Upon written approval of Doyon Utilities’ Authorized Representative, the Contractor shall remove all test coppers and other temporary piping, permanently close and seal all associated corporation stops with copper discs and flare nuts installed in the presence of Doyon Utilities’ Authorized Representative, and backfill test copper excavations to finished grade in accordance with Division 20 - Earthwork.

I. Ductile Iron Force Main Continuity Testing

Continuity testing shall not be performed until the force main that is being tested is completely backfilled to finished grade.

A sufficient number of continuity tests shall be conducted so that all new ductile iron force main is continuity tested. All continuity tests shall be through continuity test leads. Continuity test sections shall not exceed 500 feet in length.

During each continuity test, the Contractor shall maintain a circuit of 600 amperes DC current for a period of 15 minutes. Return current shall be at least 90% of the input current.

J. Retesting

If the Contactor’s facilities fail to meet any of the requirements specified above, the Contractor shall locate and correct the cause of the failure, and retest until successful results are obtained, all to the satisfaction of Doyon Utilities’ Authorized Representative and all at Contractor expense.

K. Acceptance of New Facilities

The Contractor may request inspection, testing, and acceptance of incremental segments of the work, such as a completed gravity sewer main section with a completed manhole at each end.

The Contractor shall not allow new facilities to receive wastewater or to be placed into service until all new facilities been inspected, cleaned and repaired as required,



successfully tested, and accepted for operation in writing by Doyon Utilities’ Authorized Representative subsequent to receipt of Alaska Department of Environmental Conservation (ADEC) “Approval to Operate” if required.

Article 50.02.5 - Demolition A. Limits of Demolition

Sewer lines shall be demolished to limits shown on the Plans or as directed by Doyon Utilities’ Authorized Representative.

B. Written Notice of Sewer Service Outages

Written notice of all planned sewer service outages must be provided by the Contractor in strict accordance with Section 50.01 _- General.

C. Sewage Bypass Pumping and Providing of Portable Toilets During Sewer Service Outages

If required in the Contract Documents or directed by Doyon Utilities’ Authorized Representative, sewage shall be bypass pumped and portable toilets shall be provided and maintained during sewer service outages in accordance with Section 50.06 - Sanitary Sewage Bypass Pumping.

D. Earthwork

All trenching, pipe bedding, backfilling, and related work shall be in accordance with Division 20 - Earthwork.


E. Verification of Existing Sewer Line Materials and Outside Diameters

Prior to any existing sewer line demolition, the Contractor shall physically verify the material types, configurations, and outside diameters of any existing sewer lines that must be capped, plugged, blind-flanged, clamped, or tied in to as part of the demolition, to the satisfaction of Doyon Utilities’ Authorized Representative. All caps, plugs, blind flanges, repair clamps, transition couplings, gaskets, bolting materials, and incidentals as needed to complete the demolition and associated work, shall be provided based on physically verified existing sewer line material types, configurations, sizes, and outside diameters, and shall be available on site before proceeding with sewer line demolition.

F. Existing Sewer Line Demolition

Existing sewer lines to be demolished shall be as shown or noted on the Plans or as directed by Doyon Utilities’ Authorized Representative.

G. Closure of Existing Ductile Iron, HDPE, and/or Asbestos Cement (AC) Gravity Sewer Mains to Remain After Demolition

For existing ductile iron, HDPE, and/or AC gravity sewer mains that are to remain in operation after a sewer service demolition, the existing sewer service saddle or other connection shall be removed at the existing main. The existing hole in the main shall be sealed with a stainless steel repair clamp. The minimum length of a repair clamp shall



be as recommended by the clamp manufacturer for the size of the pipe wall penetration being sealed. Repair clamp installation shall be in strict accordance with clamp manufacturer’s recommendations. The repair clamp shall be visually inspected for leakage by the Contractor and Doyon Utilities’ Authorized Representative under normal line flow, and any leakage shall be repaired to the satisfaction of Doyon Utilities’ Authorized Representative at Contractor expense, all prior to backfilling.

H. Closure of Existing Portland Cement Concrete Gravity Sewer Mains to Remain After Demolition

For existing Portland cement concrete gravity sewer mains that are to remain in operation after a sewer service demolition, the existing sewer service saddle or other connection shall be removed at the main. A section of the existing concrete main directed by Doyon Utilities’ Authorized Representative shall be very carefully excavated, cut off, and removed, while protecting the ends of existing concrete main pipe to remain. A section of new Class 52 ductile iron plain end pipe section, with inside diameter closely matching the inside diameter of existing Portland cement concrete gravity sewer main pipe to the satisfaction of Doyon Utilities’ Authorized Representative, shall be installed in place of removed Portland cement concrete piping using two transition couplings. Transition couplings shall be installed in strict accordance with clamp manufacturer’s recommendations. Transition couplings shall be visually inspected for leakage by the Contractor and Doyon Utilities’ Authorized Representative under normal line flow, and any leakage shall be repaired to the satisfaction of Doyon Utilities’ Authorized Representative at Contractor expense, all prior to backfilling.

After the closure of the existing gravity sewer main, the modified main shall be carefully backfilled.

I. Site Cleanup and Disposal of Demolition Debris

The site shall be cleaned up after demolition to the satisfaction of Doyon Utilities’ Authorized Representative, and all demolition debris shall be disposed of offsite at a location directed by Doyon Utilities’ Authorized Representative.

J. Red-Lining

Demolished sewer lines shall be crossed out and noted as demolished on red-line drawings in accordance with Division 65 - JBER Construction Surveys.



SECTION 50.03 - SANITARY SEWER MANHOLES

Article 50.03.1 - General The Work under this Section includes construction of new sanitary sewer manholes.

Refer to Standard Details 50.03-1 through 50.03-3 for additional information on fully assembled sanitary sewer manholes.

Refer to Standard Details 50.03-4 through 50.03-9 for additional information on sanitary sewer manhole component parts.

Refer to Standard Detail 50.03-10 for additional information on sanitary sewer manhole heights above finished grade or depths below finished grade for various typical manhole locations.

Refer to Standard Detail 50.02-3 for additional information on drop connections at manholes.

Refer to Section 50.01 – General for additional general requirements.

Article 50.03.2 - Material A. Bases, Barrel Sections, Reducing Slabs, Eccentric Cones, Top Slabs, and Grade Rings

Portland cement concrete manhole bases, barrel sections, reducing slabs, eccentric cones, top slabs, and grade rings shall conform to the requirements of ASTM C478 and the Standard Details. Reinforcement steel shall conform to the requirements of ASTM A185 and ASTM A615, Grade 60 steel, and the Standard Details.

Manhole steps shall conform to the Standard Details.

B. Pipe-to-Manhole Waterstop Connectors

Pipe-to-manhole waterstop connectors shall be elastomer sleeves that are cast into concrete manhole walls at penetrations, and shall fit snugly around the pipe perimeters to form water-tight connections. Pipe-to-manhole waterstop connectors shall conform to applicable provisions of ASTM C923. Pipe-to-manhole waterstop connectors shall be “A-LOK Z-LOK” or Doyon Utilities’ Authorized Representative accepted equal for pipe outside diameters up to 18.25-inches and “A-LOK Premium” for pipe outside diameters larger than 18.25-inches.

C. Piping Materials for Gravity Drop Connections

Piping materials for gravity drop connections shall be in accordance with Section 50.02 – Gravity Sewer Lines and Force Mains, and the Standard Details.

D. Standard Manhole Frames and Covers

Standard manhole frames and covers shall be gray iron with a minimum 30,000-pound tensile strength in accordance with ASTM A48, shall have appropriate certifications and be individually marked in accordance with the requirements of AASHTO M306. Standard manhole frames and covers shall be as shown on the Standard Details and shall be “East Jordan Iron Works Catalog #2615Z” (frame) and “Catalog #2615C” (cover) or Doyon Utilities’ Authorized Representative accepted equal. The word “Sewer” shall be cast into standard manhole covers.



E. Watertight Manhole Frames and Covers

Watertight manhole frames and covers shall be gray iron with a minimum 30,000-pound tensile strength in accordance with ASTM A48, shall have appropriate certifications and be individually marked in accordance with the requirements of AASHTO M-306. Water tight manhole frames and covers shall be as shown on the Standard Details and shall be “East Jordan Iron Works #2615ZPT” (frame) and “#2615APTGS” (cover) or Doyon Utilities Authorized Representative accepted equal. The word “Sewer” shall be cast into water tight manhole covers.

F. Plastic Gasket Joint Sealer

Gasket material for concrete-to-concrete bell-and-spigot joints in manhole sections shall be “Henry Ram-Nek” or Doyon Utilities’ Authorized Representative accepted equal.

G. Manhole Exterior Surface Waterproofing

Manhole exterior surface waterproofing shall be shop-applied “Koch Materials TUFF-N-DRI” or Doyon Utilities’ Authorized Representative accepted equal, applied in strict accordance with waterproofing manufacturers’ recommendations.

H. Manhole External Joint Sealant

External joint sealant for joints in manhole sections shall be heat-shrinkable “CCI Pipeline Systems Wrapidseal” or Doyon Utilities’ Authorized Representative accepted equal.

I. Miscellaneous Concrete

Miscellaneous concrete for on-site construction of manhole channels, etc., shall be 3000-PSI minimum design strength, Class A-3, per Division 30 – Portland Cement Concrete.

J. Mortar

Mortar shall be composed of 1 part cement and 3 parts sand. Cement for mortar shall conform to the requirements of ASTM C150, Type II. Sand shall conform to the requirements of AASHTO M45. The addition of lime is not permitted. The use of 5 minute or fast-cure mortar is prohibited.

Article 50.03.3 - Construction A. Earthwork

All trenching, backfilling, and related work shall be in accordance with Division 20 - Earthwork.

Backfill for 3 feet minimum all around manholes shall be non-frost-susceptible, to reduce the possibility of frost jacking damage.

Care shall be taken during backfilling to protect manhole exterior surface waterproofing, exterior joint sealant (if installed), and polyethylene sheeting wrap to the satisfaction of Doyon Utilities’ Authorized Representative.

B. Maximum Horizontal Spacing of Manholes

Horizontal spacing between adjacent manholes in a gravity sewer main shall not exceed 400 lineal feet unless shown otherwise on the Plans or directed otherwise by Doyon Utilities’ Authorized Representative.



C. Manhole Bases

Manhole bases shall be installed such that primary sewer lines enter or leave radially at the invert elevations shown on the Plans. The base section shall be set plumb on a prepared surface.

D. Manhole Pipe Stub-Outs for Future

Where indicated on the Plans, piping stub-outs shall be provided for future connections to manholes. Stub-outs shall be sized, oriented, and sloped as shown on the Plans or as directed by Doyon Utilities’ Authorized Representative. The ends of stub-outs shall be stopped with standard tight-fitting pipe caps to prevent water, earth, or other substances from entering the pipe. Manholes up to 12 feet in depth shall have 10 foot long stub-outs, and manholes greater than 12 feet in depth shall have 18 foot long stub-outs.

E. Manhole Joint Gasket

Plastic gasket joint sealer shall be installed in strict accordance with the manufacturer's recommendations and to the satisfaction of Doyon Utilities’ Authorized Representative. Gaskets shall be trimmed on the inside of the manhole to prevent the excess gasket material from entering the sanitary sewer lines.

F. Manhole Grade Rings

Manholes shall have 6 inches minimum to 18 inches maximum of precast concrete grade rings. Manhole grade rings shall be placed on full beds of mortar to prevent settlement.

G. Manhole Frames and Covers

Manhole frames and covers shall be set at the rim elevations shown on the Plans, or shall be installed and set relative to finished grade in accordance with the Standard Details. Manhole frames shall be placed on full beds of mortar to prevent settlement.

Watertight manhole frames and covers shall be installed where called out on the Plans or where directed by Doyon Utilities’ Authorized Representative.

H. Manhole Exterior Joint Sealant and Polyethylene Wrap

Where shown on the Plans or directed by Doyon Utilities’ Authorized Representative, the Contractor shall apply heat-shrinkable exterior joint sealant at all manhole joints prior to backfilling. Exterior joint sealant shall be installed in strict accordance with manufacturers’ recommendations and to the satisfaction of Doyon Utilities’ Authorized Representative.

After application of exterior joint sealant (if required) and prior to backfilling, manhole exteriors shall be wrapped with three full layers of 8 mil polyethylene sheeting and secured with duct tape to the satisfaction of Doyon Utilities’ Authorized Representative.

I. Sanitary Sewer Manhole Invert Construction

The invert channels shall be smooth and semicircular in shape conforming to the inside of the connecting sanitary sewer section. Changes in directions of flow shall be made by forming a smooth radius sized to allow adequate access for a television camera and/or maintenance equipment into sanitary sewer pipe. Changes in size and grades of the channels shall be made gradually and evenly. The invert channels shall be formed and



poured in place. The floors of manholes outside of the channels shall be smooth and shall slope toward the channels at a grade of one inch per foot. No surfaces shall be permitted in finished manhole bases that would allow wastewater solids to accumulate in the event of wastewater backup. Manhole inverts shall be in accordance with the Standard Details.

J. Beaver Slide Connections at Manholes

Beaver slide inverts shall be required where inverts of the connecting sanitary sewers are above the crowns of the receiving sewers and invert drops in manholes do not exceed 24 inches. Beaver slides shall be constructed to provide smooth and continuous channels directed into and with the flow of the receiving sanitary sewers and in accordance with the Standard Details.

K. Gravity Drop Connections at Manholes

Gravity drop connections at manholes shall be required where invert drops in manholes exceed 24 inches. Drop connections shall be constructed in accordance with the Standard Details and to the satisfaction of Doyon Utilities’ Authorized Representative.

L. Leak Repair

Any visually detectable leakage paths into completed manholes shall be sealed to the satisfaction of Doyon Utilities’ Authorized Representative at Contractor expense.

M. Red-Lining

The Contractor shall obtain accurate as-built elevations and GPS coordinates on all sanitary sewer manhole structure centerlines, covers, and buried inverts of pipes stubbed out for future, and as-built elevations of pipe inverts at manholes, and record these elevations and coordinates on red-line drawings in accordance with Division 65 - JBER Construction Surveys.



SECTION 50.04 - SANITARY SEWER LIFT STATIONS

Article 50.04.1 - General The Work under this Section addresses construction of sanitary sewer lift stations.


Article 50.04.2 - Material Materials for sanitary sewer lift stations shall be as shown on the Plans and/or as specified in the Special Provisions.

Article 50.04.3 - Construction Sanitary sewer lift stations shall be constructed in accordance with the Plans and the Special Provisions.



SECTION 50.05 - FORCE MAIN PERMANENT VENTS

Article 50.05.1 - General The Work under this Section addresses construction of force main permanent vents.


Article 50.05.2 - Material Materials for force main permanent vents shall be as shown on the Plans and/or as specified in the Special Provisions.

Article 50.05.3 - Construction Force main permanent vents shall be constructed in accordance with the Plans and the Special Provisions.



SECTION 50.06 - SANITARY SEWAGE BYPASS PUMPING

Article 50.06.1 - General The Work under this Section includes all planning, coordination, and operations pertaining to the bypass pumping of sewage flows around those portions of the sanitary sewer facilities to be rehabilitated. This work shall also include the installation, stocking, cleaning, and maintenance of portable toilets for exclusive use by building occupants affected by shutdown of sanitary sewer facilities to be rehabilitated.


Article 50.06.2 - Construction Sewage flows shall be bypassed as necessary around existing sections of sanitary sewer system that are being modified to the extent they cannot pass maximum expected sanitary sewage flows.

Under no circumstances shall the Contractor allow the discharge of sanitary sewage anywhere other than an existing operational sanitary wastewater collection system or a holding tank or tank truck acceptable to Doyon Utilities’ Authorized Representative. No excavation will be permitted to facilitate this Work, except as indicated on the Plans or authorized in writing by Doyon Utilities’ Authorized Representative.

Sanitary sewer service to any building shall not be interrupted more than 6 consecutive hours, or more than once in a 24 hour period.

The number and location of portable toilets shall be as called out on the Plans or in the Special Provisions, or directed by Doyon Utilities’ Authorized Representative. These portable toilets shall be for the exclusive use of affected building occupants. Portable toilets shall have toilet paper and hand sanitizer dispensers, shall be well vented, and shall be cleaned, maintained, and stocked just prior to installation and daily thereafter, all to the satisfaction of Doyon Utilities’ Authorized Representative.

At least 14 calendar days prior to any bypass pumping, the Contractor shall submit a written plan, for acceptance by Doyon Utilities’ Authorized Representative, addressing the following issues:

A. An estimate of the minimum and maximum sewage flow rates expected to be bypassed, including an allowance for larger-than-normal sewage flows due to heavy rainfall or other causes.

B. A plan layout and written description of the bypass pumping system showing and/or describing primary bypass pumps, locations, capacities, spare pumps, suction and discharge line types, diameters, lengths, and routings, and other relevant information.

C. Head-discharge curves for proposed primary bypass pumps and spare pumps. Primary bypass pumps shall have capacities at least 25% larger than the expected maximum sewage flow rates. Spare bypass pumps shall have capacities equal to primary bypass pumps.

D. A description of pumping system control such that the sewage level both upstream and downstream of the bypass will not reach elevations that will cause backup and damage to the properties being served, including a discussion of the elevation of the upstream sewage level needed to actuate the pumping cycle.



E. A discussion of noise and odors generated by bypass pumping and other possible nuisance conditions, and how these conditions will be mitigated.

F. An operations and maintenance manpower plan for bypass pumping.

G. A schedule of the planned dates and hours of operation of bypass pumping.

H. A plan layout of portable toilets for exclusive use by personnel affected by shutdown of sanitary sewer facilities

I. Any other relevant information needed to assess the Contractor’s plan for providing bypass pumping and portable toilets.

The Contractor shall install, operate, and maintain the bypass pumping system in substantial conformance with the bypass pumping plan accepted by Doyon Utilities’ Authorized Representative. The Contractor shall only deviate from the accepted plan as necessary to accommodate emergencies and potentially detrimental conditions not anticipated or addressed in the accepted plan.

Spare bypass pumps shall be on site and ready for operation for the entire duration of sewage bypass pumping.

The portable toilets shall be promptly removed when the work is completed to the satisfaction of Doyon Utilities’ Authorized Representative.

The Contractor shall be liable for all damages which result from sewage flows not properly bypassed.



SECTION 50.07 - NEW CONNECTIONS TO EXISTING SANITARY SEWER MANHOLES

Article 50.07.1 - General The Work under this Section includes new sewer line connections to existing manholes.


Article 50.07.2 - Material A. Pipe-to-Manhole Waterstop Connectors

Pipe-to-manhole waterstop connectors shall be elastomer sleeves that are installed in core drilled manhole penetrations, have expansion devices to seal tightly in cored holes, and fit snugly around the pipe perimeters, all as required to form water-tight connections. Pipe-to-manhole connectors shall conform to applicable provisions of ASTM C923. Pipe-to-manhole connectors shall be “A-LOK G3 Boot System” or Doyon Utilities’ Authorized Representative accepted equal for pipe outside diameters from 3.5-inches to 13.5-inches. Pipe-to-manhole connectors for pipe outside diameters larger than 13.5-inches shall be as shown on the Plans or as specified in the Special Provisions.

B. Other Materials

Other materials for new connections to existing manholes shall be in accordance with Section 50.02 - Gravity Sewer Lines and Force Mains and Section 50.03 – Sanitary Sewer Manholes.

Article 50.07.3 - Construction A. Written Notice of Sewer Service Outages


B. Sewage Bypass Pumping and Providing of Portable Toilets During Sewer Service Outages

If required in the Contract Documents or directed by Doyon Utilities’ Authorized Representative, sewage shall be bypass pumped and potable toilets shall be provided and maintained during sewer service outages in accordance with Section 50.06 - Sanitary Sewage Bypass Pumping.

C. Earthwork

All trenching, backfilling, bedding, and related work shall be in accordance with Division 20 - Earthwork.


Backfill for 3 feet minimum all around modified manholes shall be non-frost-susceptible, to reduce the possibility of frost jacking damage.




D. Completion of Upstream Work

Connections to existing sanitary sewer manholes will be allowed only after all portions of the Contractor's sewer work upstream of connection points has been satisfactorily completed, inspected, cleaned and repaired as necessary, and tested, all to the satisfaction of Doyon Utilities’ Authorized Representative.

E. Existing Manhole Structural Modifications as Required for New Connections

If new connections to existing manholes are in conflict with existing manhole ladder rungs, the Contractor shall remove the existing ladder rungs and install new ladder rungs as necessary to clear of piping penetrations. Existing ladder rungs shall be cut off and ground smooth against the interior wall of manhole. New ladder rungs shall be in accordance with Standard Details. The Contractor shall rotate existing cone sections, cone sections with reducing slabs, or flat top slabs, and unaltered existing barrel sections as necessary to align with new ladder rungs.

As part of rotating existing cone sections, cone sections with reducing slabs, or flat top slabs, and barrel sections, all existing manhole joint gasketing shall be removed, existing manhole exteriors shall be pressure washed, and new plastic gasket joint sealer, new external joint sealant (if required), and new exterior polyethylene wrap shall be provided in accordance with Section 50.03 – Sanitary Sewer Manholes, all to the satisfaction of Doyon Utilities’ Authorized Representative.

F. Installation of New Piping Connections

New sewer piping shall be connected to existing manholes so that inverts enter at elevations shown on the Plans.

Connections of new sewer piping to existing manholes shall be made by core drilling new penetrations into manholes and installing pipe-to-manhole waterstop connectors to produce water tight seals. Core drilled hole diameters and details, and pipe-to-manhole waterstop connector installation, shall be in strict accordance with waterstop connector manufacturer’s instructions.

Drop connections, if required, shall be in accordance with Section 50.02 - Gravity Sewer Lines and Force Mains and the Standard Details.

G. Manhole Channel Modifications

Existing manhole channels shall be broken out as necessary and re-worked to form smooth new channels in accordance with requirements of Section 50.03 – Sanitary Sewer Manholes and the Standard Details.

Beaver slide inverts shall be installed where inverts of new connecting sanitary sewers are above the crown of receiving sewers and the new invert drops in manholes do not exceed 24 inches. Beaver slides shall be constructed to provide smooth and continuous channels in accordance with Section 50.03 – Sanitary Sewer Manholes and the Standard Details.



Drop connections shall be installed where new invert drops in manholes would exceed 24 inches.

H. Repairs and Cleanup

Completed connections to existing manholes and the manhole structures themselves shall be water tight. Any visually detectable leakage paths into existing manholes with new piping connections shall be sealed and any Contractor-caused damage shall be repaired, all to the satisfaction of Doyon Utilities’ Authorized Representative, and all at Contractor expense.

Manholes shall be left clean and free from any construction-related debris. The Contractor shall dispose of all debris resulting from construction of new piping connections to existing manholes at a location specified by Doyon Utilities’ Authorized Representative.

I. Red-Lining

The Contractor shall obtain accurate as-built invert elevations and GPS coordinates on all new connections to existing sanitary sewer manholes, and record these elevations and coordinates, as well as all structural and piping changes, on red-line drawings in accordance with Division 65 - JBER Construction Surveys.



SECTION 50.08 - EXISTING MANHOLE REHABILITATION OR REMOVAL

Article 50.08.1 - General The Work under this Section includes the following activities:

A. Removal of existing manhole covers and frames, and replacement with new standard manhole covers and frames.

B. Removal of existing manhole covers and frames, and replacement with new water-tight manhole covers and frames.

C. Removal and replacement of manhole grade rings.

D. Removal and replacement of manhole ladder rungs.

E. Removal and replacement of manhole cone sections.

F. Removal and replacement of manhole flat top slabs or reducing slabs.

G. Removal and replacement of manhole barrel sections.

H. Removal and replacement of manhole base sections.

I. Removal of existing piping connections at manholes and sealing of abandoned piping penetrations.

J. New channeling or rechanneling in manhole bases.

K. Removal and replacement of entire manholes.

L. Removal of entire manholes without replacement.

Refer to Standard Details 50.03-1 through 50.03-3 for additional information on fully assembled sanitary sewer manholes.

Refer to Standard Details 50.03-4 through 50.03-9 for additional information on sanitary sewer manhole component parts.

Refer to Standard Detail 50.03-10 for additional information on sanitary sewer manhole heights above finished grade or depths below finished grade for various typical manhole locations.


Article 50.08.2 - Material Replacement piping materials for existing manhole rehabilitation shall be in accordance with Section 50.02 – Gravity Sewer Lines and Force Mains.

Replacement manhole materials for existing manhole rehabilitation shall be in accordance with Section 50.03 – Sanitary Sewer Manholes.

Bricks for sealing of abandoned manhole wall piping penetrations shall be 3 inch by 4 inch by 8 inch Portland cement concrete bricks.

Mortar for sealing of abandoned manhole wall piping penetrations shall be rapid-setting Portland cement based mortar, 6600 PSI compressive strength in 7 days, “SikaSet Mortar” or Doyon Utilities’ Authorized Representative accepted equal.





B. Sewage Bypass Pumping and Providing of Portable Toilets During Sewer Service Outages

If required in the Contract Documents or directed by Doyon Utilities’ Authorized Representative, sewage shall be bypass pumped and potable toilets shall be provided and maintained during sewer service outages in accordance with Section 50.06 - Sanitary Sewage Bypass Pumping.

C. Earthwork



If manhole rehabilitation involves removal of cone sections, flat top or reducing slabs, barrel sections, or bases, backfill for 3 feet minimum all around modified manholes shall be non-frost-susceptible, to reduce the possibility of frost jacking damage.


D. Existing Manhole Modifications

The manhole components to be removed and replaced for specific manholes shall be as identified in the Plans or as directed by Doyon Utilities’ Authorized Representative. The Contractor shall carefully salvage, protect, and reuse those manhole components that are not scheduled for replacement in rehabilitated manholes.

Where the work requires disassembly and reuse of components that are assembled with grout and/or plastic gasket joint sealer, the Contractor shall completely remove these materials from the components, and replace all existing grout and/or plastic gasket joint sealer with new grout and/or plastic gasket joint sealer during reassembly of the rehabilitated manhole.

Where the work requires the removal and replacement of existing ladder rungs in a manhole, these rungs shall be cut off and ground smooth against the interior wall of manhole. New ladder rungs shall be in accordance with Standard Details. The Contractor shall rotate existing cone sections, cone sections with reducing slabs, or flat top slabs, and unaltered existing barrel sections if necessary to align with new ladder rungs.

As part of removal and replacement or rotation of existing cone sections, cone sections with reducing slabs, or flat top slabs, and barrel sections, all existing manhole joint gasketing shall be removed, exteriors of existing manhole components to be reused



shall be pressure washed, and new plastic gasket joint sealer, new external joint sealant (if required), and new exterior polyethylene wrap shall be provided in accordance with Section 50.03 – Sanitary Sewer Manholes, all to the satisfaction of Doyon Utilities’ Authorized Representative.

E. Abandonment of Existing Piping Connections

Piping removal without replacement shall be as shown on the Plans or as directed by Doyon Utilities’ Authorized Representative. Abandoned piping penetrations shall be sealed by brick-and-mortar closures to the satisfaction of Doyon Utilities’ Authorized Representative.

Completed brick-and-mortar manhole wall closures shall be allowed to cure for a minimum of 48 hours prior to backfilling, during which time the closures shall be protected from all damage to the satisfaction of Doyon Utilities’ Authorized Representative.

After a minimum of 48 hours of curing, brick-and-mortar manhole wall closures shall be carefully backfilled to the satisfaction of Doyon Utilities’ Authorized Representative.

F. Installation of New Piping Connections

New piping connections to existing manholes shall be in accordance with Section 50.07 - New Connections To Existing Sanitary Sewer Manholes.

G. New Manhole Channeling or Existing Channel Modifications

New channeling and/or rechanneling shall be installed as required in new manhole bases in accordance with Section 50.03 – Sanitary Sewer Manholes and the Standard Details. Re-worked channels shall have smooth flow surfaces and curves satisfactory to Doyon Utilities’ Authorized Representative.

H. Repairs and Cleanup

Rehabilitated manholes shall be water tight. Any visually detectable leakage paths into rehabilitated manholes shall be sealed and any Contractor-caused damage shall be repaired, all to the satisfaction of Doyon Utilities’ Authorized Representative, and all at Contractor expense.

I. Rehabilitated manholes shall be left clean and free from any construction-related debris. The Contractor shall dispose of all debris resulting from rehabilitation of existing manholes at a location specified by Doyon Utilities’ Authorized Representative.Red-Lining

The Contractor shall obtain accurate as-built rim and invert elevations and GPS coordinates on all rehabilitated manholes, and record these elevations and coordinates, as well as all structural and piping changes, on red-line drawings in accordance with Division 65 - JBER Construction Surveys.



SECTION 50.09 - ADJUST EXISTING SANITARY SEWER MANHOLE FRAMES AND COVERS TO FINISH GRADE AND ADJUST EXISTING MANHOLE CONES OR FLAT TOP SLABS

Article 50.09.1 - General The Work under this Section includes adjustment of existing manhole frames and covers to finish grade and adjustment of existing manhole cones or flat top slabs.

Refer to Standard Details 50.09-1 and 50.09-2 for additional information on existing manhole frame and cone adjustments. Refer to Section 50.01 – General for additional general requirements.

Article 50.09.2 - Material Manhole materials for adjustment of existing manhole frames and covers to finish grade and adjustment of manhole cones or flat top slabs, including replacement of damaged and/or missing manhole components, shall be in accordance with Section 50.03 – Sanitary Sewer Manholes.

Article 50.09.3 - Construction A. General

All existing manhole frame and cover and/or existing manhole cone or flat top slab adjustment shall be completed in accordance with Section 50.03 – Sanitary Sewer Manholes.

The final frame elevations of adjusted manholes shall be as shown on the Plans, in accordance with the Standard Details, or as directed by Doyon Utilities’ Authorized Representative.

After adjustment, manholes shall have 6 inches minimum to 18 inches maximum of precast concrete grade rings. Grade rings and frames shall be placed on full beds of mortar.

B. Earthwork


Backfill for 3 feet minimum all around adjusted manholes shall be non-frost-susceptible, to reduce the possibility of frost jacking damage.


C. Manhole Frame and Cover Adjustments

For manhole frame and cover adjustments, the Contractor shall remove and salvage existing frames and covers, remove existing grade rings and/or add new grade rings as required, and reinstall frames and covers to the correct elevations.



D. Manhole Cone or Flat Top Slab Adjustments

For manhole cone or flat top slab adjustments, the Contractor shall remove and salvage existing frames and covers, grade rings, and cones or flat top slabs, remove existing barrel sections if required, add new barrel sections if required, reinstall cones or flat top slabs, reinstall some or all existing grade rings as required, add new grade rings as required, and reinstall existing frames and covers to the correct elevations.

Where disassembling a manhole for cone or flat top slab adjustment, the Contractor shall completely remove all existing plastic gasket joint sealer from the manhole components to be reused, and replace all existing plastic gasket joint sealer with plastic gasket joint sealer during reassembly of the adjusted manhole.

As part of cone or flat top slab adjustment, exteriors of existing manhole components to be reused shall be pressure washed, and new external joint sealant (if required) and 3 wraps of new exterior polyethylene wrap shall be provided in accordance with Section 50.03 – Sanitary Sewer Manholes, all to the satisfaction of Doyon Utilities’ Authorized Representative.

E. Repair and Clean-Up

Any Contractor-caused damage to adjusted manholes shall be repaired or the damaged portion shall be replaced, all at the Contractor expense. Manholes shall be left clean and free from any construction-related debris.

The Contractor shall dispose of all debris resulting from frame and cover, cone, or flat top slab adjustment at a location specified by Doyon Utilities’ Authorized Representative.

F. Red-Lining

The Contractor shall obtain as-built cover elevations and GPS coordinates on adjusted manholes, and record these elevations and coordinates on red-line drawings in accordance with Division 65 - JBER Construction Surveys.



SECTION 50.10 - ADJUST EXISTING CLEANOUTS TO FINISH GRADE

Article 50.10.1 - General The Work under this Section includes adjustment of existing gravity main and gravity service line cleanouts to finish grade.

Refer to Standard Details 50.02-4, 50.02-5, and 50.02-7 through 50.02-9 for additional information on gravity main and service cleanouts.


Article 50.10.2 - Material Materials for adjustment of existing gravity main and gravity service cleanouts to finished grade, including replacement of damaged and/or missing cleanouts components, shall be in accordance with Section 50.02 - Gravity Sewer Lines and Force Mains and the Standard Details.

Article 50.10.3 - Construction A. Earthwork


Backfill for 3 feet minimum all around adjusted cleanouts shall be non-frost-susceptible, to reduce the possibility of frost jacking damage.

The Contractor shall remove and dispose of all sewage-saturated and otherwise contaminated soils encountered within the trench areas to limits directed by Doyon Utilities’ Authorized Representative. Sewage-saturated and otherwise contaminated soils shall not be re-used as fill or backfill material anywhere on JBER, but shall be disposed of in accordance with Division 20 - Earthwork.

B. Cleanout Adjustments

All existing main and service line cleanout adjustment shall be completed in accordance with the Plans, the Standard Details, Section 50.02 - Gravity Sewer Lines and Force Mains, and to the satisfaction of Doyon Utilities’ Authorized Representative.

For main cleanout adjustments the Contractor shall remove and salvage existing frames and covers, cut off and remove existing riser piping if required, add new restrained riser piping if required, and reinstall frames and covers to the correct elevations. If new riser piping is added during cleanout adjustment the new riser piping shall be encased in 3 wraps of new polyethylene encasement in accordance with Section 50.02 - Gravity Sewer Lines and Force Mains.

For service line cleanout adjustments, the Contractor shall remove and salvage existing valve box top sections and covers or other access structures, remove and salvage existing watertight caps, cut off and remove existing riser piping if required, add new restrained riser piping if required, and reinstall existing valve box top sections or other access structure and watertight caps at the correct elevations.



If new riser piping is added during cleanout adjustment, the new riser piping shall be encased in 3 wraps of new polyethylene encasement in accordance with Section 50.02 - Gravity Sewer Lines and Force Mains.

Any existing cleanout components that are scheduled for reuse, but are found to be damaged or cannot be salvaged for any reason, shall be replaced with new components to the satisfaction of Doyon Utilities’ Authorized Representative and at Contractor expense.

C. Red-Lining

The Contractor shall obtain accurate as-built elevations and GPS coordinates on all adjusted cleanout frames and covers, or other access structures, and record these elevations and coordinates on red-line drawings in accordance with Division 65 - JBER Construction Surveys.



SECTION 50.11 - REMOVE AND DISPOSE OF EXISTING CESSPOOLS OR SEPTIC TANKS AND CONNECT TO NEW SEWER SERVICES

Article 50.11.1 - General The Work under this Section includes removal and disposing of existing cesspools or septic tanks and connection of existing building sewer piping to operating sanitary sewer systems by gravity service lines. This work also includes the installation, stocking, cleaning, and maintenance of portable toilets for exclusive use by building occupants affected by removal of existing cesspools or septic tanks.

Refer to Standard Detail 50.02-5 for additional information on gravity service services.


Article 50.11.2 - Material A. Fill Material

Fill material shall be in accordance with Division 20 - Earthwork.

B. New Sewer Service Piping Materials

Piping material shall be in accordance with Section 50.02 - Gravity Sewer Lines and Force Mains.


Written notice of all planned sewer service outages must be provided by the Contractor in strict accordance with Section 50.01 - General.

B. Earthwork


Backfill for 3 feet minimum all around any service line cleanouts and similar piping shall be non-frost-susceptible, to reduce the possibility of frost jacking damage.

The Contractor shall remove and dispose of all sewage-saturated and otherwise contaminated soils encountered within trench and excavation areas to limits directed by Doyon Utilities’ Authorized Representative. Sewage-saturated and otherwise contaminated soils shall not be re-used as fill or backfill material anywhere on JBER, but shall be disposed of in accordance with Division 20 - Earthwork.

C. Portable Toilets

Portable toilets shall be provided for exclusive use of affected building occupants during sanitary sewer service interruption. At least one portable toilet shall be provided for each affected building, but additional portable toilets shall be provided if directed by Doyon Utilities’ Authorized Representative. Portable toilets shall have toilet paper and hand sanitizer dispensers, shall be well venting, and shall be cleaned, maintained, and stocked just prior to installation and daily thereafter, all to the satisfaction of Doyon Utilities’ Authorized Representative.



D. Construction Work

Construction work shall be scheduled and coordinated so that sanitary sewer service shall not be interrupted for more than 6 hours. If possible, work shall be scheduled when the building where service is to be interrupted will be unoccupied.

The following general procedures shall apply:

1. The existing building sewer shall be located at least 7 calendar days in advance and existing piping material and diameter shall be physically verified by the Contractor, all to the satisfaction of Doyon Utilities’ Authorized Representative. A transition coupling shall be provided in advance of the proper size and configuration to transition from the existing building sewer piping to new sewer service piping.

2. During the entire sewer service interruption, portable toilet(s) shall be supplied at a convenient location (or locations) for building occupants to the satisfaction of Doyon Utilities’ Authorized Representative.

3. If possible, new sewer service piping shall be constructed and connected to existing building sewer piping in advance of cesspool or septic tank removal. If new sewer service piping cannot be connected to existing building sewer piping in advance of cesspool or septic tank removal, then new sewer service piping shall be constructed as close as possible to existing building sewer piping to the satisfaction of Doyon Utilities’ Authorized Representative.

4. The liquid and sludge from the existing cesspool or septic tank shall be pumped into septic pumper trucks, transported, and disposed of at an approved sewage dump station designated by Doyon Utilities’ Authorized Representative. Care shall be exercised to avoid spillage occurs during transport and disposal.

5. The existing building sewer shall be excavated and neatly cut off. Provisions shall be made to catch and dispose of accidental sewage discharges prior to connection of the new sewer service, all to the satisfaction of Doyon Utilities’ Authorized Representative.

6. The septic tank, cesspool including logs or cribbing, any remaining sludge, and any saturated soil remaining in the area, shall be removed to the satisfaction of Doyon Utilities’ Authorized Representative, and disposed of at a disposal area designated by Doyon Utilities’ Authorized Representative.

7. If necessary, the excavation created by removal of the cesspool or septic tank shall be backfilled and compacted lifts to the level needed to complete installation of any remaining new sewer service piping and tie-in to the existing building sewer in accordance with Division 20 - Earthwork.

8. Installation of any remaining new sewer service piping and tie-in to the existing building sewer shall be completed and checked for leaks and the new connection shall be properly bedded, all to the satisfaction of Doyon Utilities’ Authorized Representative.

9. The excavation shall then be fully backfilled and compacted in accordance with Division 20 - Earthwork.

10. The portable toilet(s) shall be promptly removed when the work is completed to the satisfaction of Doyon Utilities’ Authorized Representative.



E. Red-Lining

The Contractor shall obtain accurate elevations and GPS coordinates at new sewer service alignment changes, clean-outs, and the points where the new service connects to the existing building sewer and to the sewer main, and record these elevations and coordinates on red-line drawings in accordance with Division 65 - JBER Construction Surveys.



LIST OF WASTEWATER COLLECTION SYSTEMS STANDARD DETAILS

Detail # Description 50.02-1 JBER Sewer Line Typical Trench Section 50.02-2 JBER Requirements for New Sewer Line Crossing of Existing Water Line 50.02-3 JBER 8” to 12”ø Ductile Iron Gravity Sewer Drop Connection 50.02-4 JBER 8”ø Ductile Iron Gravity Sewer End-of-Main Cleanout 50.02-5 JBER Typical Gravity Sewer Service 50.02-6 JBER Gravity Sewer Service Stubbed Out for Future 50.02-7 JBER Gravity Sewer Service for On-Site Lift Station 50.02-8 JBER Standard 4”ø Gravity Sewer Service Cleanout Access 50.02-9 JBER Special 4” or 6”ø Gravity Sewer Service Cleanout Access 50.02-10 JBER Deep Sewer Riser for Gravity Sewer Services 50.02-11 JBER Sewer Line Railroad Crossing in Casing 50.03-1 JBER 48”ø Gravity Sewer Manhole for 4” to 24”ø Pipe 50.03-2 JBER 72”ø Gravity Sewer Manhole with 48”ø Top for 30” to 36”ø Pipe 50.03-3 JBER 72”ø Gravity Sewer Manhole with Flat Top for 30” to 36”ø Pipe 50.03-4 JBER Gravity Sewer Manhole Step 50.03-5 JBER Typical Gravity Sewer Manhole Channel 50.03-6 JBER Gravity Sewer Manhole Beaver Slide 50.03-7 JBER Gravity Sewer Standard Manhole Cover 50.03-8 JBER Gravity Sewer Standard Manhole Frame 50.03-9 JBER Gravity Sewer Water-Tight Manhole Cover 50.03-10 JBER Gravity Sewer Water-Tight Manhole Frame 50.03-11 JBER Gravity Sewer Manhole Height Above or Depth Below Finished

Grade 50.09-1 JBER Existing Gravity Sewer Manhole Frame Adjustment 50.09-2 JBER Existing Gravity Sewer Manhole Cone Adjustment

A

JOINT BASE ELMENDORF-RICHARDSON STANDARD CONSTRUCTION SPECIFICATIONS AND DETAILS

DIVISION 50 - WASTEWATER COLLECTION SYSTEMS

Revisions between 2014 and 2015 Rev.001

Item or Location Description of Revision

Title Sheet Added "AND DETAILS" to title Changed “2014” to “2015”

Entire Document Added "AND DETAILS" to title in page header

Entire Document Changed “2014” to “2015 Rev.001” in page footer

Entire Document Changed Article numbering format to include Division and Section number (50.0#)

Entire Document Changed "excavation permit" to "Dig Clearance Permit" in several locations.

TABLE OF CONTENTS

Entire Table Changed format by using Microsoft WORD Table of Contents feature to automatically provide page numbers for and hyperlinks to various Sections and Articles. Updated page numbering as necessary.

Section 50.01 Added new “Article 50.01.10 - Fire Hydrant Use Permit Requirements” and renumbered remaining Articles as appropriate.

End of Table of Contents

Added new Section title “LIST OF WASTEWATER COLLECTION SYSTEM STANDARD DETAILS”.

SECTION 50.01 - GENERAL

Article 50.01.4 (was 1.4)

First paragraph, changed “International Code Council (ICC)” to “International Association of Plumbing and Mechanical Officials (IAPMO)”. Last item in the list of standards “ICC IPC” changed to “UPC”; “and as amended by the Municipality of Anchorage, and current local amendments” changed to “State of Alaska”


First sentence, changed “Plans or Special Provisions” to “Contract Documents.


Second paragraph, added “Unless specifically noted otherwise in this Division 50,”. Second paragraph, changed “pressure” to “air testing, hydrostatic”. Seventh paragraph “7” changed to “14”

JBER Standard Construction Specifications and Details Revisions Between 2014 Standard Division 50 – Wastewater Collection Systems and 2015 Rev.001 Standard

B



Changed "excavation permit" to “Dig Clearance Permit” in 3 locations. Changed “an excavation permit signed by all appropriate JBER departments” to “a Dig Clearance Permit from JBER CES (673 ABW Form 3 – BCE Work Clearance Request”.

Article 50.01.10 (was 1.10)

Added new Article “Fire Hydrant Use Permit Requirements” and renumbered subsequent article numbers in this Section as appropriate.

Article 50.01.11 (was 1.10)

First paragraph, added “, as well as any deviations from Contract requirements, all”. Second paragraph, numbered list: item #3, changed "excavation permit" to “Dig Clearance Permit”; deleted existing item #7 and renumbered remaining items; inserted new item #10 “14 day and 24 hour advance notifications to wastewater customers of shutdowns or other possible disruptions of normal wastewater collection service.”. Third paragraph, added new first and last sentences.

new Article 50.01.12 (was 1.11)

First paragraph, changed, “the Request for Proposal, Bidding Documents, and/or the Contract” to “in the Contract Documents”. Second paragraph, deleted, “with the Request for Proposal, Bidding Documents, and/or”; inserted “Documents”.

old Article 50.01.12 (was 1.12)

Deleted article in its entirety.

Article 50.01.13 (was 1.13)

Paragraph B., subparagraph #1, added “, with concrete dimensions to match existing”. Paragraph D., added last sentence.

Article 50.01.14 (was 1.14)

Second paragraph, added last sentence.

Article 50.01.15 (was 1.15)

Changed "others are authorized" to "directed otherwise".

SECTION 50.02 GRAVITY SEWER LINES AND FORCE MAINS


Modified table to delete HDPE gravity and force mains, and added notes referring to standard details. Inserted seven new paragraphs referencing Standard Details. Last line inserted “ – General”


C



Paragraph A., subheading #1, first subparagraph, added “Class 52 for 4 inch diameter and Class 50 for 6 inch and larger diameters”. Paragraph A., subheading #1, second subparagraph, added “Portland cement” and “at demolished sewer service locations,”. Paragraph A., subheading #4, first subparagraph, changed “a minimum of 250 PSI” to “250 PSI minimum”. Paragraph A., subheading #5, first subparagraph, changed “Restrained” to “Field installed flanges shall be restrained”; changed “A563” to “A536”; added “with break-away head restrainer bolts and heat-treated restraining lugs,”; added new second subparagraph; fourth subparagraph changed “316” to “304”. Paragraph A., subheading #5, first subparagraph, added “minimum”;. Paragraph A., subheading #7, added third subparagraph. Paragraph B., subheading #2, added “on a case by case basis”. Paragraph B., subheading #3, changed “316” to “304” in 2 locations. Paragraph B., deleted subheadings #4, #5 & #6 and all associated text. Paragraph C., inserted new subheading #2 and text. Paragraph C., deleted existing subheadings #2 #3 and all associated text; renumbered remaining subheading. Paragraph D., deleted subheadings #1, #2 & #3 and all associated text; renumbered remaining subheadings. Paragraph D., subheading #1 (was #4), deleted “asbestos cement”; added “in accordance with the Standard Details using”. Paragraph D., inserted new subheading #2 and text; renumbered remaining subheadings. Paragraph D., subheading #3 (was #5), added 3 new subparagraphs about transition couplings; deleted 1 existing subparagraph; last subparagraph changed wording about minimum required length of repair clamp. Paragraph D., deleted existing subheadings #6 #7 and all associated text; renumbered remaining subheading. Paragraph D., subheading #5 (was #9), added “Frames and” to heading and the first sentence; changed “East Jordan Iron Works #3668” to “in accordance with the Standard Details”; changed “standard manhole” to “main cleanout”. Paragraph D., inserted new subheading #6 and text. Paragraph D., inserted new subparagraph #7. Paragraph E., subheading #1, modified 1 existing sentence & added 1 new sentence about casing spacer design.


D


Article 50.02.2 (was 2.2) (continued)

Paragraph E., subheading #2, first subparagraph, added “, as shown on the Standard Details, or as directed by Doyon Utilities’ Authorized Representative”; second subparagraph, changed “If casing” to “Casing”; changed “, are not otherwise detailed on the Plans, they” to “as shown on the Standard Details,”; changed “Henry Ram-Nek” to “1/2 inch thick by 10 inch wide neoprene padding”.


Paragraph A., first subparagraph, minor wording changes to second and third sentence; second subparagraph, added clarification. Paragraph B., heading, minor wording change; first paragraph minor wording change and deleted reference to ductile iron, HDPE and copper. Paragraph B., subheading #1, added second paragraph about sewage saturated soils; third paragraph, added several sentences clarifying depth of bury requirements. Paragraph B., subheading #2, deleted existing third paragraph; added first and eighth of new and remaining paragraphs; modified seventh and tenth of new and remaining paragraphs. Paragraph B., subheading #3, added “by the Contractor” to first sentence. Paragraph C., minor wording change; deleted first paragraph. Paragraph C., subheading #1, changed “Pipe Laying” to “Installation Requirements for Ductile Iron and HDPE Gravity Sewer Lines See Articles 50.02.3., paragraphs A. and B. above for additional applicable requirements.” Paragraph C., subheading #1.a., added heading “Depth of Bury” and three subparagraphs. Paragraph C., subheading #1.b., moved heading “Pipe Laying” and paragraph from C.1. Paragraph C., subheading #1.c., added heading “Service Connections” and moved three paragraphs from C.2. Paragraph C., subheading #1.d., added heading “Insulation of Gravity Mains and Services, added one paragraph and three subparagraphs. Paragraph C., subheading #1.e., added heading “Air Testing of New Gravity Mains and Services” and moved one paragraph from C.2. Paragraph C., subheading #2, “Gravity Sewer Service Connections to Gravity Mains” changed to “Additional Installation Requirement for Ductile Iron Gravity Mains and Services”, added a paragraph. Paragraph C., subheading #2.a., moved heading “Polyethylene Encasement” and paragraph from E.1; added three more paragraphs. Paragraph C., subheading #2.b., added heading “Pipe Installation” and moved paragraph from E.3.


E



Paragraph C., subheading #2.c., added heading “Ductile Iron Pipe Bedding and Backfill”; moved paragraph from 2.3.E.2; moved part of paragraph from E.1. Paragraph C., subheading #2.d., added heading “New Gravity Sewer Drop Connections at Manholes”; moved paragraph from C.4. Paragraph C., subheading #2.e., added heading “New Gravity Sewer Main Cleanouts” and paragraph. Paragraph C., subheading #2.e., added heading “New Gravity Sewer Connections to New or Existing Ductile Iron or HDPE Gravity Mains or Existing AC Mains” and two paragraphs. Paragraph C., subheading #2.g., added heading “New Gravity Sewer Service Connections at Deep Sewer Risers”; moved two paragraphs from 2.3.C.3 with some modifications. Paragraph C., subheading #2.h., added heading “New Ductile Iron Gravity Service Connections to Existing Portland Cement Concrete Gravity Mains”; minor modifications to four paragraphs which were seventh thru tenth paragraphs of 2.3.C.2; deleted eleventh paragraph. Paragraph C., subheading #2.i., added heading “Gravity Sewer Service Cleanouts”; added sentence referencing standards; modified remainder of paragraph regarding location and distance. Paragraph C., subheading #3., added heading “Additional Installation Requirements for HDPE Gravity Mains; added paragraph “See Articles 2.3.A, 2.3.B, and 2.3.C.1 above for additional applicable requirements.” Paragraph C., subheading #3.a., moved heading “Inspection of Pipe” and paragraph from F.1. Paragraph C., subheading #3.b., moved heading “Pipe Cleaning Prior to Fusion” and paragraph from F.2. Paragraph C., subheading #3.c., moved heading “Butt Fusion Joining and Interior Bead Removal” and four paragraphs from F.3. Paragraph C., subheading #3.d., moved heading “Electro-Fusion Joining” and paragraph from F.4. Paragraph C., subheading #3.e., moved heading “Pipe Installation” and three paragraphs from 2.3.C.F.5; replaced fourth paragraph with “All new HDPE gravity main sections shall extend from manhole to manhole.” Paragraph C., subheading #3.f., added heading “HDPE Pipe Bedding” and paragraph.


F



Paragraph D., changed “General Force Main Installation Requirements” to “Installation Requirements for Force Mains”. Paragraph d., subheading #1., added heading “Installation Requirements for Ductile Iron and Copper Force Main” added paragraph “See Articles 2.3.A and 2.3.B above for additional applicable requirements.” Paragraph D., subheading #1.a., changed “Discharge Points” to “Depth of Bury”; added paragraph and deleted two paragraphs about discharge points. Paragraph D., subheading #1.b., added ”If possible, force mains shall be installed without high points in the profile that could permanently trap air.” Paragraph D., subheading #1.c., modified paragraph by breaking out sub paragraphs i and ii, added “Copper force mains shall be insulated from the lift stations outside wall to at least 2 feet beyond the point of discharge from the force main.” Paragraph D., subheading #2., added “Additional Installation Requirements for Ductile Iron Force Mains”. Paragraph D., subheading #2.a., copied heading “Polyethylene Encasement” and paragraph from E.1; added two more paragraphs. Paragraph D., subheading #2.b., added heading “Force Main Pipe Installation”; moved paragraph from 2.3.E.5 with modifications; added second paragraph on ductile iron force main installation. Paragraph D., subheading #2.c., added heading “Ductile Iron Force Main Bedding and Backfill”; copied paragraph with modification from 2.3.E.2; added second paragraph about protecting polyethylene encasement. Paragraph D., subheading #2.d., added heading “Trust Restraint”; moved two paragraphs from 2.3.E.5 with modifications; added paragraph about tie-in. Paragraph D., subheading #2.e., added heading “Continuity Straps and Test Leads”; moved three paragraphs from E.5. Paragraph D., subheading #2.f., added heading “Connection to Wastewater Collection Systems”; added paragraph about force main connection. Paragraph D., subheading #3., added heading “Additional Installation Requirements for Copper Tubing Force Mains”; added “See Articles 2.3.A, 2.3.B, and 2.3.D.1 above for additional applicable requirements.” Paragraph D., subheadings #3.a. – d., added heading “Copper Tubing Installation”; moved five paragraphs from H. with modifications. Paragraph E., added heading “Installation Requirements for Ductile Iron Gravity Sewer Mains, Gravity Services, and Force Mains in Casings; added “See Article 50.02.3., paragraphs A. and B. above for additional applicable requirements.” Paragraph E., subheading #1., added heading “Casing Pipe, Vent, and Placard Installation”; added paragraph referencing Division 20.


G



Paragraph E., subheading #2., added heading “Carrier Pipe Installation”; moved six paragraphs from E.6 with modifications. Paragraph E., subheading #3., added heading “Continuity Straps on Carrier Pipe in Casing”; added paragraph with reference to D.2.e. Paragraph E., subheading #4., added heading “Installation of Casing End Seals; moved five paragraphs from E.7.

Deleted approximately 23 headings and 57 paragraphs from this area. Most were relocated elsewhere with some being modified and others staying the same. An attempt has been made throughout this revision log to indicate where a paragraph was moved from (in the 2014 version) and whether it was modified. Those paragraphs that were completely deleted either dealt with HDPE or the information was transferred to the detail drawings.

Paragraph F. (was L.), subheading #1., added “including but not limited to water”; added “and”; deleted “permanent vent lines, etc.” Paragraph F. (was L.), subheading #4., deleted “lines”; added “and the Standard Details”. Paragraph G. (was J.), added “Sewer Piping” to the heading. Paragraph G. (was J.), subheading #1., first subparagraph added “electronic total stations, GPS surveying equipment,”; second subparagraph added “typical trench section requirements of the Standard Details, shall be compacted in lifts to 95% minimum to the satisfaction of Doyon Utilities’ Authorized Representative,” deleted “requirements of Type II classified fill”, added “otherwise”. Paragraph G. (was J.), subheading #2.a., added heading “Gravity Mains and Services”; deleted “All gravity sewer mains and services shall be installed with 5 foot minimum earth cover from finished grade.”; added three subparagraphs about depth of bury and insulation requirements, added reference to Article 50.02.3., paragraph C.1.d. Paragraph G. (was J.), subheading #2.b., added heading “Force Mains”; “above for gravity sewer mains and services with less than 6 feet of earth cover and” changed to “in Article 2.3.D.1.c above”. Paragraph G. (was J.), subheading #3., changed heading “Minimum Slopes of Gravity Sewer Mains and Service Lines” to “Gravity Sewer Main and Gravity Service Line Alignment and Grade Tolerances”; second sub paragraph added “, or sags”. Paragraph G. (was J.), subheading #4., changed heading “Force Mains” changed to “Force Main Alignment Grade Tolerances”; changed first paragraph to refer to plans and allow 0.2 foot deviation rather than 0.10 foot; paragraph two minor changes; deleted last line.


H



Paragraph H. (was K.), added “, stationing and offsets as applicable,”; deleted “manhole centerlines, manhole covers,”; deleted “HDPE butt fusion joint stations,”; added “applicable stations and offsets,”; “in red on a clean set of issued-for-construction drawings” changed to “on red-line drawings”.


Paragraph A., changed “testing line” to “test copper”; changed “flushing, testing, and disinfection” to “inspection and testing”. Paragraph B., changed “List” to “General Sequence”. Paragraph B., existing subheading #5., deleted item “Pressure testing of all new HDPE force mains.”; renumbered subsequent items. Paragraph B., new subheading #5. (was #6.), deleted “and/or other temporary piping”. Paragraph B., new subheading #6. (was #7.), deleted “all”. Paragraph B., existing subheading #8., deleted item “Trace wire field verification for all new HDPE gravity sewer services and force mains.” Paragraph C., Second subparagraph, changed “If necessary” to “If directed by Doyon Utilities’ Authorized Representative”; fourth paragraph, changed “the storm drain” to “gravity sewer mains”; seventh paragraph, added “of notice”. Paragraph E., subparagraph #1, added “, either directly into sewer mains of from sewer services,”; fourth paragraph, added “and services”. Paragraph F., first subparagraph, changed “All main and service pipe openings in a main” to “All gravity main and connected gravity services in each main”; changed second paragraph “plugged pipe” to “plugged gravity sewer system”. Paragraph G., first subparagraph, added “with potable water”; added second subparagraph about detected leakage. Existing paragraph H., deleted entire paragraph about HDPE Force Main Pressure Testing; renumbered subsequent paragraphs. Paragraph H. (was I.), deleted “and other temporary piping”. Paragraph I. (was J.), added two lines about continuity testing. Existing paragraph K., deleted entire paragraph about HDPE Gravity Sewer Field Verification. Paragraph K. (was M.), added “if required” to last line.

Article 50.02.5 Added new Article 50.02.5 – DEMOLITION in its entirety.

SECTION 50.03 - SANITARY SEWER MANHOLES


Added four paragraphs referencing Standard Details. Last line inserted “ – General”


I



Paragraph C., added “, and the Standard Details”. Paragraph D., deleted “dust pans” from heading and first sentence; second sentence “in conformance with” changed to “as shown on”; “IFCO #740” changed to “Catalog #2615Z (frame) and Catalog #2615C (cover)”; deleted third sentence. Paragraph E., second sentence “in conformance with” changed to “as shown on”; added “#2615ZPT (frame) and #2615APTGS (cover). Paragraph F., deleted “, for concrete-to-concrete flat joints at grade rings in non-traffic areas, and for manhole frame metal-to-concrete joints in non-traffic areas”. Paragraph H., “Marathon Materials MacWrap” changed to “heat-shrinkable CCI Pipeline Systems Wrapidseal”. Paragraph I., added “ – Portland Cement Concrete”


Paragraph A., heading “General” changed to “Earthwork”; added two sentences about backfill. Paragraph B., added heading “Maximum Horizontal Spacing of Manholes” and following paragraph. Paragraphs C., D., and E., added headings. Paragraph F., added heading “Manhole Grade Rings” and deleted sentence about plastic gasket sealer. Paragraph G., added heading “Manhole Frames and Covers”; moved first sentence to the end; deleted second sentence; third sentence “and shall be located” changed to “or shall be installed and set”; added fourth sentence placing frames in motor; deleted fifth sentence setting frames 6 inches above grade. Paragraph H., added heading “Manhole Exterior Joint Sealant and Polyethylene Wrap”; minor modifications to first two paragraphs; deleted third and fourth paragraph. Paragraph I., added last sentence. Paragraph K., added last sentence. Paragraph L., added heading “Leak Repair” and paragraph. Paragraph M., deleted “and”; added “and buried inverts of pipes stubbed out for future; “in red on a clean set of issued for construction drawings” changed to “on red-line drawings”.

SECTION 50.04 - SANITARY SEWER LIFT STATIONS


Last line inserted “ – General”


J


SECTION 50.05 - FORCE MAIN PERMANENT VENTS



SECTION 50.06 - SANITARY SEWAGE BYPASS PUMPING




Last line deleted “during the progress of bypass pumping”

SECTION 50.07 - NEW CONNECTIONS TO EXISTING SANITARY SEWER MANHOLES




Paragraph B., added “Section 50.02 – Gravity Sewer Lines and Force Mains and”.


Paragraphs A. & B., added headings and associated paragraphs “Written Notice of Sewer Service Outages” and “ Sewage Bypass Pumping and Providing of Portable Toilets During Sewer Service Outages”. Paragraph C. added heading “Earthwork”; added “bedding” to first paragraph; added three paragraphs. Paragraph D. added heading “Completion of Upstream Work”; first paragraph deleted “inspected, and”; deleted second paragraph. Paragraph E. added heading “Existing Manhole Structural Modifications as Required for New Connections”; first paragraph, third sentence added “, cone sections with reducing slabs, or flat top slabs”; second paragraph added “sections, cone sections with reducing slabs, or flat top slabs,”; added “(if required); “8 mil plastic sheeting (3 full wraps)” changed to “polyethylene wrap”. Paragraph F. added heading “Installation of New Piping Connections”; added second paragraph about drop connections. Paragraph G. added heading “Manhole Channel Modifications”; first paragraph added “and re-worked” and “and the Standard Details”; second paragraph added “Section 50.03 – Sanitary Sewer Manholes and”; third paragraph deleted last sentence. Paragraph H. added heading “Repairs and Cleanup”; modified both paragraphs. Paragraph I. added heading “Red-Lining”; added “invert”; “in red on a clean set of issued-for-construction drawings” changed to “on red-line drawings”.


K


SECTION 50.08 - EXISTING MANHOLE REHABILITATION OR REMOVAL


Paragraph F. added “slabs or”. Added several references to Standard Details. Last line inserted “ – General”.


Added “wall” to third and fourth sentence


Paragraphs A. & B., added headings and associated paragraphs “Written Notice of Sewer Service Outages” and “Sewage Bypass Pumping and Providing of Portable Toiltes During Service Outages”. Paragraph C. added heading “Earthwork”; added “bedding” to first paragraph; added three paragraphs. Paragraph D. added heading “Existing Manhole Modifications”; first paragraph added “or as directed by Doyon Utilities’ Authorized Representative” and “carefully salvage,”; fourth paragraph “or flat top reducing slabs” changed to “cone sections with reducing slabs, or flat top slabs”; fifth paragraph “rotating” changed to “removal and replacement or rotation of”; added “sections, cone sections with reducing slabs, or flat top slabs,”; “existing manhole exteriors” changed to “exteriors of existing manhole components to be reused”; added (if required)”; deleted sixth paragraph. Paragraph E. added heading “Abandonment of Existing Piping Connections”; first paragraph deleted “modifications for manhole rehabilitation or”; added two paragraphs brick-and-mortar closures. Paragraph F. added heading “Installation of New Piping Connections” and paragraph. Paragraph G. added heading “New Manhole Channeling or Existing Channel Modifications”; added “and the Standard Details. Re-worked channels shall have flow surfaces and curves satisfactory to Doyon Utilities’ Authorized Representative.” Paragraph H. added heading “Repairs and Cleanup”; first paragraph added “Rehabilitated manholes hall be water tight.”, “and any Contractor-caused damage shall be repaired, all”, and “, and all at Contractor expense”; deleted three paragraphs; added one paragraph on cleaning. Paragraph I., added heading “Red-Lining”; added “rim and invert”; “in red on a clean set of issued-for-construction” changed to “on red-line”.

SECTION 50.09 - ADJUST EXISTING SANITARY SEWER MANHOLE FRAMES AND COVERS TO FINISH GRADE AND ADJUST EXISTING MANHOLE CONES OR FLAT TOP SLABS


Added second paragraph referencing Standard Details. Last line inserted “ – General “


L



Paragraph A., deleted first paragraph; fourth paragraph deleted “In non-traffic areas, grade rings shall be set in and made secure by use of plastic gasket joint sealer. In traffic areas”, deleted “to prevent settlement”. Paragraph B., added heading “Earthwork” and three paragraphs. Paragraph C., added two paragraphs about adjustment. Paragraph D., added heading “Repair and Clean-up” and two paragraphs Paragraph E., “in red on a clean set of issued-for-construction drawings” changed to “on red-line drawings”.

50.10 - ADJUST EXISTING CLEANOUTS TO FINISH GRADE

Article 50.10.1 (was 10.1)

Added second paragraph referencing Standard Details. Last line inserted “ – General“.

Article 50.10.2 (was 10.2)

Deleted “standard” and “line”; added “and the Standard Details”

Article 50.10.3 (was 10.3)

Added heading “Earthwork” and two paragraphs. Paragraph B., added heading “Cleanout Adjustments”; deleted first paragraph; second paragraph added “main and service line”; third paragraph added “restrained” and “required”, deleted “joint shall be restrained in accordance with Section 50.02 – Gravity Sewer Lines and Force Mains, and new ductile iron riser piping”, added “3 wraps of”; deleted fourth paragraph; fifth paragraph “standard service” changed to “service line”, added “valve box top sections and covers or other access structures, deleted and salvage existing”, added “valve box top sections or other access structure and”; sixth paragraph deleted “ductile iron”, added “3 wraps of”; added final paragraph about reusing existing cleanouts. Paragraph C., added heading “Red-Lining”; added “or other access structures,”, “in red on clean set of issued-for-construction drawings” changed to “on red-line drawings”.

SECTION 50.11 - REMOVE AND DISPOSE OF EXISTING CESSPOOLS OR SEPTIC TANKS AND CONNECT TO NEW SEWER SERVICES

Article 50.11.1 (was 11.1)

Added “by gravity service lines”. Added reference to Standard Detail. Last line inserted “ – General”.


M


Article 11.3.A Paragraph A., added heading “Written Notice of Sewer Service Outages” and paragraph. Paragraph B., added heading “Earthwork”; first paragraph added “bedding”; added two paragraphs about backfill and sewage-saturated soils. Paragraph C., added heading “Portable Toilets”. Paragraph D., added heading “Construction Work”; “,and so that all construction work occurs on a normal week day between the hours of 9 AM and 3 PM.” changed to “If possible, work shall be scheduled when the building where service is to be interrupted will be unoccupied.” Paragraph D., Deleted the paragraph that was formerly 11.3.A and changed all the following paragraph bullets from letters to numbers. Paragraph D., subparagraph #1., “48 hours” changed to “7 calendar days”, “determined” changed to “physically verified”, and “in coordination with” changed to “to the satisfaction of”. Paragraph D., subparagraph #2., added “During the entire sewer service interruption”. Paragraph D., subparagraph #8., added “and checked for leaks and the new connection shall be properly bedded, all”; deleted paragraph that was formerly3.J. Paragraph E., added heading “Red-Lining” and paragraph.

LIST OF WASTEWATER COLLECTION SYSTEMS STANDARD DETAILS

Title, changed “SANITARY SEWER” to “WASTEWATER COLLECTION SYSTEMS. Deleted all references to 2009 Municipality of Anchorage (MOA) standard details Changed detail number format from “50-#” to “50.0#-#”, where the first “#” references a Section number in this document. Added “JBER” to description (title) of each detail.

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