ADDENDUM NUMBER FOUR BID S-6-21 · From: City of Cheyenne, Purchasing Manager, TJ Barttelbort Date:...

ADDENDUM NUMBER FOUR

BID S-6-21

To: All Prospective Bidders and all others concerned

From: City of Cheyenne, Purchasing Manager, TJ Barttelbort

Date: October 5, 2020

Subject: Addendum Number Four to Bid S-6-21 for the Happy Jack Landfill Phase 2,

Cells 1 and 2 Construction and Cell 3 Excavation Earthworks project

The changes, clarifications, omissions, additions, and/or alterations in, on, and to the bid

information and specifications shall apply to the Invitation For Bid submitted for and to the project

indicated above. Except as modified by this Addendum Number Four, all of the terms and

provisions of the Invitation for Bid for the above listed project remain in full force and effect. This

Addendum Number Four supersedes all previous instructions pertaining to the items listed:

Revised Bid Submission Deadline:

1. The revised bid submission deadline is updated to Friday, October 09, 2020, 02:00 PM

in in Room 309 of the Municipal Building at 2101 O’Neil Avenue, Cheyenne, WY 82001.

Clarifications:

C1: Three (3) revised drawings are provided via this Addendum Four, to clarify liner

requirements in the sumps and the components of the Leachate Collection System.

Drawings titled “LEACHATE COLLECTION SYSTEM DETAILS (SHEET 1 OF 2)”

“LEACHATE COLLECTION SYSTEM P&ID,” & “LEACHATE COLLECTION

SYSTEM CELL DISCHARGE PIPE SYSTEM SECTIONS AND DETAILS” are

included.

Questions & Responses:

Q1: Please confirm that the Survey used for final payment quantities of the installed

geosynthetic materials will be based on actual surface area (3D) and include materials

buried in the anchor trenches. We assume the double layer (rubsheets) of HDPE liner and

GCL placed in the sump and slope risers will be considered incidental and not part of the

final payment area.

City of Cheyenne - Purchasing

2101 O’Neil Avenue, Room 309

Cheyenne, WY 82001

307-773-1045

[email protected]

Addendum Four / Bid S-6-21 / of 6

A1: Final payment of installed geosynthetics will be based on neat line 3D surface area of

materials installed. Material installed in the anchor trenches will be added to neat line

surveyed quantity per Detail 3 on Sheet 7. The HDPE liner and GCL in the sump area and

side slope risers will be surveyed and included as part of final payment area.

Q2: Scope of work clarification:

The measurement and payment for Earthworks, Item 5 – Prepare Cell Subgrade (Finish

Grading), states “including but not limited to: protection and maintenance of the subgrade;

drying and/or moisture-conditioning for roller compaction, as required; excavating,

hauling, and satisfactorily disposing of and replacing all unsuitable subgrade material; and

proof-rolling as directed by the CQA MANAGER.”

The measure and payment for Installation, Item 2 – Installation of GCL states “including

but not limited to: subgrade maintenance, acceptance, and protection; protection of

installed GCL; repair of damaged installed GCL as necessary; and field quality control.”

Please confirm that ALL subgrade maintenance (including surface/stormwater removal)

during geosynthetic installation is the responsibility of the Earthwork contractor.

A2: The Earthworks Contractor will be responsible for all subgrade maintenance during

geosynthetics installation including but not limited to: protection and maintenance of the

subgrade; drying and/or moisture-conditioning for roller compaction, as required;

excavating, hauling, and satisfactorily disposing of and replacing all unsuitable subgrade

material; and proof-rolling as directed by the CQA MANAGER. The Earthworks

Contractor will also need to maintain subgrade moisture content to the specified moisture

content; and, provide equipment and operators during liner deployment to repair areas of

the subgrade which require repair due to deployment operations. The Geosynthetics

Installer can disregard the subgrade maintenance reference under Item 2 in Section 01 22

13.

Q3: Should the Geosynthetic Procurement bid include sales tax and cost for payment bonds?

A3: The cost of all Performance & Payment Bonds shall be included in the cost of the submitted

bid. If a supplier is providing the geosynthetics materials directly to the City of Cheyenne,

then sales tax is not applicable. However, if the geosynthetics are provided by an installer

or party other than the manufacturer, sales tax needs to be included.

Q4: Can the 5% retainage be waived from the Geosynthetic Procurement payment since the

scope is supply only and the contract is complete upon material delivery?

A4: No, the 5% retainage will not be waived.

Q5: Please confirm the Geosynthetic Procurement bid form quantities for the HDPE and GCL

include the extra materials for the double layer (rubsheets) in the sumps and slope risers.

Our calculations show these two bid items may be 30,000 SF short each.

A5: See revised Drawing 8 “LEACHATE COLLECTION SYSTEM DETAILS (SHEET 1 OF

2) for geosynthetic placement requirements in leachate collection sumps. Geosynthetic


suppliers shall bid the quantities provided on the bid form and provide a quantity takeoff

within 10 days of the notice of award to aid the City in ordering the required quantity of

materials form the geosynthetics supplier. The geosynthetics installer will be responsible

for providing additional materials, pre-construction testing, and conformance testing of

additional materials in the event they did not accurately estimate geosynthetics quantities

when preparing quantity takeoff.

ADDENDUM FOUR ACKNOWLEDGED:

BY_____________________________ TITLE_____________________________

(Addendum must be signed and returned with bid or receipt of the addendum must be

acknowledged on the Invitation to Bid).

REMAINDER OF PAGE INTENTIONALLY LEFT BLANK


3

1

2

1

5 ft

1 ft

2 ft

2 ft

15 ft

1 ft

GEOSYNTHETIC CLAY LINER (GSE BENTOLINER NWL OR ENGINEER APPROVED EQUIVALENT)

PRIMARY GEOMEMBRANE LINER (60-

MIL DOUBLE-SIDED TEXTURED HDPE)

GEOTEXTILE (12 OZ/SY NON-WOVEN)

GEOTEXTILE

(12 OZ/SY NON-WOVEN)

LCRS

GRAVEL

LCRS RISER PIPE

(18 in DIA SOLID HDPE SDR-17)

LCRS COLLECTION PIPE

(6 in DIA PERFORATED

HDPE SDR-17)

LDS RISER PIPE


SECONDARY GEOMEMBRANE LINER

(60-MIL DOUBLE-SIDED TEXTURED HDPE)

EXTRUSION WELD

SECONDARY GEOMEMBRANE

TO PRIMARY GEOMEMBRANE

LCRS RISER PIPE

(18 in DIA PERFORATED HDPE SDR-17, 5 ft MIN)

LDS RISER PIPE

(12 in DIA PERFORATED HDPE SDR-17)

SAND

DRAINAGE

LAYER

GEOTEXTILE


B

8

A

8

GEOSYNTHETIC CLAY LINER (GSE BENTOLINER NWL OR ENGINEER

APPROVED EQUIVALENT)

1 ft

15 ft

6 in (MIN)

2 ft

2

1

1 ft

15 ft

20 ft (MIN)

2 ft

2.25 ft

1 ft

1 ft

1 ft

2 ft

LCRS COLLECTION PIPE (6 IN DIA

PERFORATED HDPE SDR-17)

LDS RISER PIPE


HDPE SDR-17)

GEOTEXTILE


LCRS RISER PIPE


HDPE SDR-17)

GEOSYNTHETIC CLAY LINER (GSE BENTOLINER NWL

OR ENGINEER APPROVED EQUIVALENT)

PRIMARY GEOMEMBRANE LINER (60-MIL

DOUBLE-SIDED TEXTURED HDPE)

SECONDARY GEOMEMBRANE LINER (60-MIL


EXTRUSION WELD



SAND

DRAINAGE

LAYER

LCRS

GRAVEL


EXTRUSION WELD



2

1

1 ft

5 ft

1 ft1 ft

1 ft

2 ft (MIN)

6 in MIN

PIPE COVER

15 ft

15 ft

1

1

GEOTEXTILE


SECONDARY GEOMEMBRANE LINER

(60-MIL DOUBLE-SIDED TEXTURED HDPE)

GEOSYNTHETIC CLAY LINER (GSE

BENTOLINER NWL OR ENGINEER


PRIMARY GEOMEMBRANE LINER (60-MIL


LDS RISER PIPE

(12 in DIA SOLID

HDPE SDR-17)

LCRS RISER PIPE

(18 in DIA SOLID

HDPE SDR-17)

LCRS COLLECTION PIPE CLEANOUT


SAND

DRAINAGE

LAYER

EXTRUSION WELD



EXTRUSION WELD




2.25 ft2 ft

CLASS B

PIPE BEDDING


GEOSYNTHETIC CLAY LINER (GSE

BENTOLINER NWL OR ENGINEER


60°

4 in (TYP)

2 in (TYP)

60°

1/4 in (MAX) DIA

HOLES DRILLED ON

4 in CENTERS.

INSTALL WITH

HOLES ON BOTTOM

END CAP

2:1

2:1

2:1

3:1 (TYP.)

3:1 (TYP)

LCRS COLLECTION PIPE

CLEANOUT (6 in DIA SOLID

HDPE SDR-17)

LCRS RISER PIPE


15 ft

15 ft

5 ft

EXTENT OF SECONDARY

LINER

5 ft SECTION OF LDS RISER PIPE

(18 in DIA PERFORATED HDPE

SDR-17, 5 FT MIN.)

5 ft SECTION OF LDS RISER PIPE

(12 in DIA PERFORATED HDPE

SDR-17)

LCRS RISER PIPE


1 ft

1 ft

2.25 ft

2 ft

5 ft

LCRS COLLECTION

PIPE (6 in DIA HDPE

PERFORATED

PIPE)

B

8

A

8

3

8

3

8

3

8

www.golder.com

01 in

123-81971

CONTROL

H008

SHEET

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1

GOLDER ASSOCIATES INC.

7245 W ALASKA DRIVE, SUITE 200

LAKEWOOD, COLORADO

UNITED STATES

[+1] (303) 980 05400 2020-05-20 ISSUED FOR BID AAAA JR TE

1 2020-10-02 ISSUED FOR ADDENDUM 4 VSAA JR TE

8 12

HAPPY JACK LANDFILL

PHASE 2, CELLS 1 AND 2 CONSTRUCTION PLANS

CHEYENNE, WYOMING

CITY OF CHEYENNE

PUBLIC WORKS DEPARTMENT

HAPPY JACK LANDFILL

LEACHATE COLLECTION SYSTEM DETAILS

TITLE

PROJECT NO. REV.

PROJECTCLIENT

CONSULTANT

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SCALE N.T.S TYPICAL SUMP CROSS-SECTION

A

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SCALE N.T.S TYPICAL SUMP DETAIL

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SCALE N.T.S LCRS RISER PIPES TRENCH ON SLOPE

2

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SCALE N.T.S TYPICAL SUMP PLAN VIEW

3

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SCALE N.T.S

LCRS AND LDS COLLECTION AND RISER PIPE

PERFORATIONS DETAIL


AutoCAD SHX Text

(SHEET 1 OF 2)

M

PI

200

LPD

FE

200

FI

200

FQI

200

M

PI

100

LPD

FE

100

FI

100

FQI

100

CELL 4

(FUTURE)

P-100P-200

CELL 3

(FUTURE)

CELL 1

CELL 2

FORCEMAIN

HEADER

HEADER

V

V

LEACHATE

COLLECTION POND

1 1/2" x 2"

2"-ICET

2"-ICET

P80 HDPE

P80 HDPE

2"-ICET

1 1/2" HDPE SDR 17

1 1/2" x 2"

2"-ICET

P80 HDPE

P80 HDPE

A/G U/G

A/G U/G

A/G U/G

A/G U/G

INSIDE RISER PIPE OUTSIDE

INSIDE RISER PIPE OUTSIDE

S40 P80

S40 P80

D.C.

1 1/4" x 1 1/2"

1 1/4" x 1 1/2"

1 1/2" HDPE SDR 17

www.golder.com

01 in

123-81971

CONTROL

H010

SHEET

10

1

GOLDER ASSOCIATES INC.

7245 W ALASKA DRIVE, SUITE 200

LAKEWOOD, COLORADO

UNITED STATES

[+1] (303) 980 05400 2020-05-20 ISSUED FOR BID JS CB JR TE

1 2020-10-02 ISSUED FOR ADDENDUM 4 JS CB JR TE

10 12

HAPPY JACK LANDFILL

PHASE 2, CELLS 1 AND 2 CONSTRUCTION PLANS

CHEYENNE, WYOMING

CITY OF CHEYENNE

PUBLIC WORKS DEPARTMENT

HAPPY JACK LANDFILL

LEACHATE COLLECTION SYSTEM P&ID

TITLE

PROJECT NO. REV.

PROJECTCLIENT

CONSULTANT

Path: \\Denver\acad\12\123-81971\DESIGN\Happy Jack Piping\PID DWG\ | File Name: 12381971-002-PID-10.dwg


SEAL

of

IF THIS MEASUREMENT DOES NOT MATCH WHAT IS SHOWN, THE SHEET SIZE HAS BEEN MODIFIED FROM: ANSI D

LEGEND

XXX

100

LPD

BALL VALVE FLANGED ENDS

SWING CHECK VALVE FLANGED ENDS

DIAPHRAGM SEAL

M

V

LOW POINT DRAIN W/ PLUGGED END

BALL VALVE SOC WELD ENDS NORMALLY CLOSED

GAUGE VALVE W/ BLEED VALVE

MAG FLOW METER

1" x 2"

CONCENTRIC REDUCER

AIR / VACUUM VALVE

SUBMERSIBLE PUMP

FLANGE

P = PRESSURE

F = FLOW

I = INDICATE

Q = TOTALIZER

E = ELEMENT

BALL VALVE THREADED ENDS NORMALLY CLOSED

FIELD LOCATED INSTRUMENT

2"-ICET

INSULATION AND HEAT TRACE

2" THICKNESS AND IC = INSULATE AGAINST COLD

ET = ELECTRIC TRACE

A/G U/G

A/G = ABOVEGROUND

U/G = UNDERGROUND

P80 HDPE

SPEC BREAK

P80 = SCHEDULE 80 PVC

HDPE = PE4710 SDR17

S40 = 316 STAINLESS STEEL

D.C.DOUBLE CONTAINED PIPE


www.golder.com

01

in

123-81971CONTROLH011

SHEET

111

GOLDER ASSOCIATES INC.7245 W ALASKA DRIVE, SUITE 200LAKEWOOD, COLORADOUNITED STATES[+1] (303) 980 05400 2020-05-20 ISSUED FOR BID JS CB JR TE

1 2020-10-02 ISSUED FOR ADDENDUM 4 JS CB JR TE

11 12

HAPPY JACK LANDFILLPHASE 2, CELLS 1 AND 2 CONSTRUCTION PLANSCHEYENNE, WYOMING

CITY OF CHEYENNEPUBLIC WORKS DEPARTMENTHAPPY JACK LANDFILL

LEACHATE COLLECTION SYSTEMCELL DISCHARGE PIPE SYSTEM SECTIONS AND DETAILS

TITLE

PROJECT NO. REV.

PROJECTCLIENT

CONSULTANT

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18"Ø LCRS RISER PIPE SEE DETAIL SHEETS 8 & 9



SEE DETAIL

SEE DETAIL 1

NOTESKEYED NOTE

1 EPG MODEL NW1.5SS-C 316SS DISCONNECT ADAPTER

2 EPG WSDPT 2-5 SUREPUMP, 1/2 HP 230 VAC 3-PHASE MOTOR WITH CP JACKETEDMOTOR LEAD, 0-5 PSI SUBMERSIBLE SENSOR W/LEAD AND 3/8" STAINLESS STEELSUSPENSION CABLE W/ CLAMPS. SIZED FOR 5.5GPM @ 100ft HEAD

3 EPG 316 STAINLESS STEEL CAM COUPLER-PART A

4 EPG 316 STAINLESS STEEL CAM COUPLER-PART C

5 1.5" SDR 17 HDPE PIPE, CUT TO LENGTH

6 EPG 316 STAINLESS STEEL CAM COUPLER-PART F

7 EPG 2" MODEL 4415 AIR/VAC VALVE

8 1 1/2" ROSEMOUNT 8705 FLANGED MAGNETIC FLOW METER

9 3/8" 316 STAINLESS STEEL SUSPENSION CABLE

10 PI-100 ASHCROFT PRESSURE INDICATOR W/ GAUGE VALVE

11 1 1/2" x 1 1/2" SS TO PVC TRANSITION CONNECTOR

12 2" PVC TRU-UNION BALL VALVE

13 2" PVC FLANGED SWING CHECK VALVE

14 2" PVC TRU-UNION BALL VALVE LOW POINT DRAIN

15 2" DISCHARGE PVC PIPE SCH 80

16 1 1/2" x 2" CONCENTRIC REDUCER

17 CONCRETE CONTAINMENT W/ RAISED CURB FOR SECONDARY CONTAINMENT

18 EPG "L" SERIES L925PT PUMPMASTER W/ WINDOWED DOOR FOR PUMP MOTOR CONTROL

19 1.5" PVC TRU-UNION BALL VALVE

20 1.5" HDPE TO MALE NPT 316SS TRANSITION FITTING

21 1.25" NIPPLE, MNPT, 316SS

22 1.25" x 1.5" REDUCER, FNPT, 316SS

NOTES1. ALL MATERIALS SHALL BE AS SPECIFIED OR ENGINEER APPROVED EQUIVALENT.2. CONTRACTOR SHALL PROVIDE 316 STAINLESS STEEL CAM COUPLERS FOR

DISCHARGE HOSE SEGMENT CONNECTIONS.3. FREEZE PROTECTION IS REQUIRED FOR ABOVE GROUND PIPING. ELECTRIC HEAT

TRACE, INSULATION AND CLADDING AS REQUIRED.4. ALL PIPING OUTSIDE OR BELOW THE CONCRETE CONTAINMENT SHALL BE DUAL

WALL SECONDARY CONTAINMENT PIPE 4" x 2".5. PROVIDE MINIMUM 5 PIPE DIAMETERS UPSTREAM AND 2 DIAMETERS DOWNSTREAM

OF FLOW METER.

5

9

2

7

15

1

6

4

2021 222

12

52

9

7

10

19

13

8

11

2

59

87 10

12

14

19 13

15

15

6' MIN

GRADEBURIALDEPTH

GRADE

NOTE 3

SEE NOTE 3

16

SEENOTE 3

16

17

17

NOTE 4

17

SEENOTE 4

NOTE 4

NOTE 4

LINK SEAL

18

SEE DETAIL 3

2" HDPE FLANGEADAPTER

2" VAN STONE PVC2 PIECE FLANGE

A11

A11NTS

SECTION

B11NTS

SECTION

111NTS

DETAIL 211NTS

DETAIL311NTS

DETAIL

-11NTS

PLAN VIEW

B 11

111 2

11

311

SEENOTE 5

203 4

5


ADDENDUM NUMBER FOUR BID S-6-21 · From: City of Cheyenne, Purchasing Manager, TJ Barttelbort Date:...

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Transcript of ADDENDUM NUMBER FOUR BID S-6-21 · From: City of Cheyenne, Purchasing Manager, TJ Barttelbort Date:...