First Addendum

Page 1

FIRST ADDENDUM TO INVITATION TO BID

FOR BLANTON CLOSED CONVEYANCE SURFACE WATER IMPROVEMENTS

PROJECT NO. 7004

CLEAN WATER SERVICES

ISSUED: FEBRUARY 24, 2020

Clean Water Services’ Invitation to Bid for Blanton Closed Conveyance Surface Water

Improvements Project No. 7004 dated February 12, 2020 (ITB) is hereby amended as follows:

1. Delete Special Specification S-19, TRAFFIC CONTROL PLAN and replace with the

following:

“S–19 Traffic Control Plan

Contractor shall always comply with all conditions of Road Access and/or Utility

Permit issued by Washington County and have a copy on-site. Contractor shall

submit a traffic control plan to Washington County and to the District for

approval. The Contractor may also apply for a temporary road closure permit at

the following web site. https://www.co.washington.or.us/LUT/Divisions/TrafficEngineering/Permits/index.cfm

No work shall begin without approval of the traffic control plan or an approved

Road Closure Permit. A copy of the approved traffic control plan and any Road

Closure Permit shall always be available at the work area.

Public roadways shall not be closed to traffic at any time without prior approval

of Washington County Land Use and Transportation Department. If Contractor

elects to apply for a road closure permit from Washington County all fees or

deposits associated with the closure request application shall be the responsibility

of Contractor. Contractor shall meet all advance posting requirements and abide

by all conditions of the permit. Washington County reserves the right to add or

modify traffic control requirements as required to effectively control traffic and

maintain public safety.

Access to existing properties shall be continuously maintained to the general

motoring public, school vehicles, mail services, emergency vehicles, and police

and fire vehicles. Contractor shall strive to maintain access to private driveways

and residences to the extent practical. It is incumbent upon the Contractor to

provide timely notification to individual property owners regarding impending,

temporary interruptions to residence and/or driveway access by private vehicles.

First Addendum

Page 2

Contractor shall comply with Chapter 1.08.7 of the District’s Design and

Construction Standards which state, “During construction, no person shall be

without vehicular access to their residence or place of business for a period

exceeding eight hours, unless the Contractor has made special arrangements in

writing with the affected person.” Failure of Contractor to abide by access

requirements shall be cause for work stoppage until effective access is

reestablished.

Contractor shall notify emergency services, public transportation, all affected

utilities and local agencies about traffic control operations to properly coordinate

and expedite the work in such a manner as to cause the least amount of conflict

and interference between the work and operations of other agencies. Contractor

shall notify school authorities at least 2 weeks in advance of any construction that

will interfere with access to schools or affect school bus routes and schedules.

The Contractor shall conduct operations to minimize interference with authorized

work of utility companies or other agencies in such streets or parking areas. The

Contractor shall keep fire hydrants on or adjacent to work accessible to

firefighting equipment.

The Contractor shall be responsible for providing adequate safeguards, safety

devices, protective equipment, and any other needed actions to protect pedestrian

traffic in connection with the performance of the work covered by the Contract.

The Contractor shall perform any measures or actions that the Engineer may deem

necessary to protect pedestrian traffic and shall be responsible for the provision

and expense of this protection.

Payment for all work associated with this section shall be based on lump sum

basis as stated in the Schedule of Bid Prices of the contract documents under Item

2, S-19 Traffic Control Plan.

The lump sum payment shall constitute full compensation for all work necessary

to prepare, submit, and receive approval of traffic control plan from Washington

County, the implementation and maintenance of traffic control operations, and

signage per the requirements of this section.”

2. Delete Special Specification S-47, ASPHALT SAWCUT, REMOVEL AND

TEMPORARY REPLACEMENT and replace with the following:

“S-47 Asphalt Sawcut, Removal and Temporary Replacement

Contractor shall vertically sawcut and remove existing asphalt pavement to the

extent necessary for the construction of proposed improvements within SW

Blanton Street. Contractor shall dispose of all asphalt removed at an approved

location offsite.

Contractor shall replace asphalt pavement removed with 3-inches of Hot Mix

Asphalt (HMAC) consisting of a wearing course, level 3, ½-inch dense, 3-inch

nominal thickness, placed in 1 lift. All work shall comply with Washington

County requirements.

First Addendum

Page 3

Payment for all work associated with this section shall be on a square foot basis as

stated in the Schedule of Bid Prices of the Contract Documents under Item 28, S-

47 Asphalt Sawcut, Removal and Temporary Replacement.

Payment shall constitute full compensation for all coordination with District,

County, labor, materials, and equipment necessary to sawcut, remove and

temporarily replace asphalt pavement per the requirements of this section.”

Except as modified in this Addendum, the ITB will remain in effect as originally written.

The following supplemental information is being provided to bidders.

1. Permit 200120 General and Special Permit Conditions as Exhibit A.

The approved permit is pending Traffic Control Plan submittal and approval. These

conditions are being provided to bidders as a courtesy.

2. Blanton St. Pothole Information as Exhibit B.

Sheets PH 1 – PH 4 showing available pothole information and asphalt thickness

along Blanton Street is being provided to bidders as a courtesy.

EXHIBIT A

Department of Land Use and TransportationOperations and Maintenance Division1400 SW Walnut Street, MS 51 Hillsboro, OR 97123phone: 503-846-7623 | fax: 503-846-7620email: Roadpermits@co.washington.or.uswww.co.washington.or.us

Conditions

Record InformationPRINT DATE: 2/12/2020 3:45 PM

Record Number Current Status Record Type / Record Name Site Address Tax Acct ID200120 Awaiting

Customer Response

Right-of-Way UtilitySW Blanton St B/T 196th & 188th - Utility

Below is a list of outstanding Conditions for the above referenced record:1. Please call the inspection request line for start work, sidewalk and curb form inspection, and any other questions

you might have regarding this permit. If work is interrupted and restarted call the inspection request line forstart.

2. The authorized lane restrictions under this permit are from 8:30AM to 4:00PM.3. Any damage to the asphalt road surface is to be repaired with an approved asphaltic material. If steel plates are

needed, please apply for a steel plate permit at washcooraca.com.4. All sidewalk repairs are to be full panel replacement. (i.e. joint to joint). The work area is to be barricaded and

an ADA compliant alternate pedestrian route provided.5. All curb/curb and gutter repairs are to be full segment replacement. (i.e. joint to joint).6. Please ensure that an alternate ADA path is provided for pedestrians during sidewalk removal and construction.7. For trenches in roadway deeper than 4 feet, compaction testing is required. And then additional compaction

tests for every 4 feet in additional depth.8. Must maintain two way traffic AT ALL TIMES, if not night work will be required.9. Temporary traffic signal shutdown will be required.10. Traffic control must be adjusted to meet conditions in field.11. Construct a P.C. CONCRETE SIDEWALK in accordance with Washington County Standard Drawing # 2110.12. Permit amendment will be required after bid is awarded.13. ALL VEHICLES, MATERIALS, AND EQUIPMENT MUST BE REMOVED FROM RIGHT OF WAY AT END OF EACH DAY14. Approved traffic control plan is required before permit will be issued.15. Restore roadway in accordance with Washington County Trench Restoration Detail. If steel plates are needed,

please apply for a steel plate permit at washcooraca.com.16. Construct a VERTICAL CURB NON-MOUNTABLE and gutter in accordance with Washington County Standard

Drawing # 2030.

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24" -81'

S =

1.49%

Sta. 10+10.00, 0.00'

Rim 200.75

IE In 18" (S) 197.51

IE In 20" (W) 197.41

IE Out 24" (E) 197.00

Sta. 10+91.00, 0.00'

Rim 200.70

IE In 24" (NW) 195.79

IE In 24" (W) 195.79

IE Out 36" (E) 195.79

Class "B" Backfill

36" - 367'

S = 0.12%

WW

W

WW

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200

199

200199

201

200

201

201

200199

200 202

201200

200201

203

203

202201

201 200 20110

+00

11+

00

12+

00

13+

00

24" - 81'

24" - 62'

24" - 6'

21" - 23'

21" - 22'

24" - 45'

18" - 12'

6

7

8

2

9

4

5

10

10+00 10+50 11+00 11+50 12+00 12+50 13+00 13+50

13+

5013

+50

180

185

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215

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PLAN0 20 40

PROFILE0 20 40

0

5

20" STORM DRAIN

(BY OTHERS)

CONSTRUCTION NOTES

1

EXISTING GROUND @ PIPE ℄

PROPOSED 8" SANITARY SEWER(SEE SHT. 04B)

20" STORM DRAIN (BY OTHERS)

SEE PLAN AND

PROFILE DETAIL

SHEET 9

PROPOSED SANITARY

SEWER

SEE SHEET 04B

EXISTING SANITARY SEWER

NOTE: CONTRACTOR TO VERIFY UTILITY CROSSING DEPTHS PRIOR

TO EXCAVATION.

ESTIMATED SAWCUT

BOUNDARY (TYP.)

SEE ADDITIONAL PROFILE

SHEET 8

January 27, 2020

3

9

(Match Exist.)

STA. 9+78.16, 26.51' LT.REMOVE AND REPLACE AREA DRAIN, TYPE IISEE SHT. 8 FOR PROFILE(FOR DETAILS, SEE SHTS. 9 AND 13)

STA. 9+82.00, 4.25' LT.FLAT TOP STORM MH (BY OTHERS)INSTALL 21" RCP CLASS V STORM PIPECONNECT TO EXISTING 20" (W) STORM PIPESEE SHT. 8 FOR PROFILE(FOR DETAILS, SEE SHTS. 11 AND 12)

STA. 10+00.00, 0.00'FLAT TOP STORM MANHOLE (BY OTHERS)CONNECT TO EXISTING 20" (W) STORM PIPECONNECT TO EXISTING 18" (S) STORM PIPEREMOVE EXISTING 20" (NE) TEMP. STORM PIPE(FOR DETAILS, SEE SHTS. 11 AND 12)

3

STA. 9+78.16 - STA. 10+34.37ABANDON IN-PLACE 12" STORM SEWER - 55'

STA. 10+06.89 - STA. 10+36.18REMOVE EXISTING 18" STORM SEWER - 46'

STA. 10+27.00, 4.50' LT.CONSTRUCT FLAT TOP STORM MANHOLE (60")INSTALL 24" RCP CLASS V STORM PIPESEE SHT. 8 FOR PROFILE(FOR DETAILS, SEE SHTS. 9, 11, AND 12)

STA. 10+36.18, 25.68' LT.INSTALL OUTFALL ENERGY DISSIPATION SOD MATINSTALL 21" RCP CLASS V STORM PIPE(FOR DETAILS, SEE SHTS. 9, 11, AND 12)

7

STA. 10+88.50, 5.50 LT.CONSTRUCT 48" STANDARD STORM MANHOLEINSTALL 24" RCP CLASS V STORM PIPESEE SHT. 8 FOR PROFILE(FOR DETAILS, SEE SHTS. 9, 11, AND 12)

STA. 10+91.00, 0.00 LT.CONSTRUCT FLAT TOP STORM MANHOLE (60")INSTALL 24" RCP CLASS V STORM PIPEINSTALL 24" RCP CLASS V STORM PIPE(FOR DETAILS, SEE SHTS. 11, AND 12)

(Match Exist.)

IE Out 20" (NE) 197.41 (TEMP)

2

4

5

6

13+

50

8

9

SEE OUTFALL PLANAND PROFILE

DETAILS ON SHT. 9

February 6, 2020

POTHOLE #1

POTHOLE #2

POTHOLE #3POTHOLE #4

POTHOLE #5

EXHIBIT B

36" - 367'

S = 0.12%

36" -

67'

S =

3.0

1%

Sta. 14+58.00, 0.00'

Rim 204.87

IE In 36" (W) 195.35

IE Out 36" (E) 195.35

Sta. 15+24.70, 2.00' Rt.

Rim 205.38

IE In 36" (W) 193.33

IE Out 24" (E) 193.33

IE Out 24" (N) 193.33

Sta. 16+55.00, 2.00' Rt.

Rim 207.41

IE In 24" (W) 192.95

IE Out 36" (E) 192.95

IE In 24" (N) 192.95

24" - 130'

S = 0.29%

Class "B" Backfill

36" - 378'

S = 0.10%

W

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15+

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24" - 130'

24" - 7'

24" - 128'

24" - 7'

36" - 367'

36" - 67'

SW

195T

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SW BLANTON ST.

SW

194T

H P

L.

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13+50 14+00 14+50 15+00 15+50 16+00 16+50 17+00 17+50

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CONSTRUCTION NOTES

Sta. 16+55.00, 2.00' Rt.

Construct 60" standard storm sewer manhole

Install 24" HDPE storm sewer pipe - 7'

Install 24" HDPE storm sewer pipe - 130'

(For details, see shts. 11 and 12)

1

2

EXISTING GROUND @ PIPE ℄

PROPOSED 8" SANITARY SEWER(SEE SHT. 05B)

EXISTING SANITARY SEWER

5

NOTE: CONTRACTOR TO VERIFY UTILITY CROSSING DEPTHS PRIOR TO

EXCAVATION.

SEE ADDITIONAL PROFILE

SHEET 8

ESTIMATED SAWCUT

BOUNDARY (TYP.)

PROPOSED SANITARY SEWER

SEE SHEET 05B

January 27, 2020

(Match Exist.)(Match Exist.)

(Match Exist.)

12

5

STA. 14+58.00, 0.00'CONSTRUCT 48" STANDARD STORM MANHOLEINSTALL 36" RCP CLASS V STORM PIPE(FOR DETAILS, SEE SHTS. 11 AND 12)

STA. 15+24.70, 2.00' RT.CONSTRUCT 60" STANDARD STORM MANHOLEINSTALL 36" RCP CLASS V STORM PIPE(FOR DETAILS, SEE SHTS. 11 AND 12)

STA. 15+25.70, 4.50' LT.CONSTRUCT 48" STANDARD STORM MANHOLEINSTALL 24" HDPE STORM PIPESEE SHT. 8 FOR PROFILE(FOR DETAILS, SEE SHTS. 11 AND 12)

3

STA. 16+54.00, 4.50' LT.CONSTRUCT 48" STANDARD STORM MANHOLEINSTALL 24" HDPE STORM PIPESEE SHT. 8 FOR PROFILE(FOR DETAILS, SEE SHTS. 11 AND 12)

4

STA. 16+55.00, 2.00' RT.CONSTRUCT 60" STANDARD STORM MANHOLEINSTALL 24" HDPE STORM PIPEINSTALL 24" HDPE STORM PIPE(FOR DETAILS, SEE SHTS. 11 AND 12)

1

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1B

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February 6, 2020

POTHOLE #6

POTHOLE #7 POTHOLE #8

36" - 378'

S = 0.10%

Sta. 20+33.23, 0.00'

Rim 205.74

IE In 12" (SW) 203.14 (Extg.)

IE In 36" (W) 192.59

IE Out 36" (E) 192.59

Class "B" Backfill

36" - 337'

S = 0.10%

WWWW

SSSS

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19+

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SW

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CONSTRUCTION NOTES

Sta. 20+33.23, 0.00'

Construct 60" standard storm sewer manhole w/ inside drop

Connect existing storm sewer

Install 36" HDPE storm sewer pipe

(For details, see shts. 11 and 12)

Sta. 20+33.23 to Sta. 20+73.47

Abandon 12" storm sewer - 43'

Sta. 20+73.47, 21.03' Lt.

Protect existing inlet

1

EXISTING GROUND @ PIPE ℄

EXISTING SANITARYSEWER CROSSING (TYP.)

2

NOTE: CONTRACTOR TO VERIFY UTILITY CROSSING DEPTHS PRIOR TO

EXCAVATION.

ESTIMATED SAWCUT

BOUNDARY (TYP.)

3

January 27, 2020

(Match Exist.)

1

February 6, 2020

POTHOLE #9

POTHOLE #10

36" - 337'

S = 0.10%

Sta. 24+84.00, 0.00'

Rim 196.30

IE In 36" (W) 192.14

IE Out 27" (N) 192.80

IE Out 12" (E) 192.14

Class "B" Backfill

12" - 11'

S = 0.44%

Sta. 24+95.00, 0.00'

Rim 196.31

IE In 12" (W) 192.09

IE Out 12" (N) 192.09

12" - 21'

S = 0.44%

36" - 114'

S = 0.10%

Sta. 23+70.00, 0.00'

Rim 197.55

IE In 36" (W) 192.25

IE Out 36" (E) 192.25

SS

W

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195196196

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00

23+

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12" - 11'

12" - 21'

27" - 21'

36" - 337'

36" - 114'

SW BLANTON ST.

1

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21+50 22+00 22+50 23+00 23+50 24+00 24+50 25+00180

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NE

STA

:

S

EE

SH

EE

T 07

CONSTRUCTION NOTES

1

2

EXISTING GROUND @ PIPE ℄

EXISTING SANITARY SEWER (TYP.)

3

SEE PLAN ANDPROFILE DETAIL

SHEET 10

NOTE: CONTRACTOR TO VERIFY UTILITY CROSSING DEPTHS PRIOR TO EXCAVATION.

4

5

6

ESTIMATED SAWCUT BOUNDARY (TYP.)

January 27, 2020

(Match Exist.)(Match Exist.)

(Match Exist.)

1

26

Sump: 191.31

STA. 23+70.00, 0.00'CONSTRUCT 48" STANDARD STORM MANHOLEINSTALL 36" RCP CLASS V STORM PIPE(FOR DETAILS, SEE SHTS. 11 AND 12)

STA. 24+84.00, 0.00'CONSTRUCT FLAT TOP STORM MANHOLE (60")INSTALL 36" RCP CLASS V STORM PIPE(FOR DETAILS, SEE SHTS. 11 AND 12)

STA. 25+16.16, 4.29' LT.INSTALL 27" RCP CLASS V STORM PIPE(FOR DETAILS, SEE SHT. 12)

STA. 24+90.51, 23.58' LT.CONSTRUCT RIPRAP PAD(FOR DETAILS, SEE SHT. 10)

STA. 25+15.60, 0.00'INSTALL 12" RCP CLASS III STORM PIPE(FOR DETAILS, SEE SHT. 12)

STA. 24+95.00, 0.00'CONSTRUCT WATER QUALITY MANHOLE (72")INSTALL 12" RCP CLASS III STORM PIPE(FOR DETAILS, SEE SHTS. 11 AND 12)

SEE OUTFALL PLANAND PROFILE

DETAILS ON SHT. 10

60"

1

1m

odifi

ed 4

8" s

tand

ard

MH

to60

" st

anda

rd M

HB

KR

2/1

0/20

February 6, 2020

POTHOLE #11

POTHOLE #12

POTHOLES #13-14