city of kirkland cedar creek culvert replacement …admin/finance... · 2020-04-03 · city of...
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CITY OF KIRKLAND
CEDAR CREEK CULVERT REPLACEMENT PROJECT JOB NO. 11-20-PW CP No. CSD0124
A DDENDUM No. 3 T o T HE P LANS, SPECIFICATIONS, P ROPOSAL AND C oNTRACT
Issued This Date: Thursday, April 2, 2020
Bid Opening: April 7, 2020 @ 10:00 AM
Place of Opening: Kirkland City Hall, Council Chambers
Notice to All P1an holders: This Addendum No. 3, containing the following revisions, additions, deletions, and/or clarifications is hereby made part of the Plan and Contract Documents for the abovenamed project Bidders shall take this Addendum into consideration when preparing and submitting their bids and it shall be attached to the Contract Documents.
Contractors shall acknowtedge receipt of this Addendum in the place provided on Proposal page P6. Failure to do so may disqualify the Bidder from consideration of its bid.
All other requirements of the contract documents remain in effect.
C ONTRACT D OCUMENTS:
Item 1: Location: Drawing SP-1 Description: Delete drawing SP-1 and replace with the attached drawing SP-1.
Sincerely,
J),w bj ~ ebbie Cook Project anager
#2125410310
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CSD0124
N
KEY NOTES
1 WORK TO BE PERFORMED DURING THE FIRST STAGE OF STREAM BYPASS SEQUENCE.
2 SEE SHEET C-2 FOR ROADWAY PLAN.
3 WORK TO BE PERFORMED DURING THE THIRD STAGE OF STREAM BYPASS SEQUENCE.
4 STORM DESIGN ON EAST SIDE OF 100TH AVE NE BY OTHERS.
5 WORK TO BE PERFORMED DURING THE FIFTH STAGE OF STREAM BYPASS SEQUENCE.
6 PROTECT EXISTING UTILITIES IN PLACE.
NOTE:
COORDINATE STAGES OF DEMOLITION
WITH TRAFFIC CONTROL
TEMPORARY BULKBAG DAM
EXISTING STORM STRUCTURE
TO REMAIN DURING CONSTRUCTION
100T
H A
VE
N
E
#2335300150
#2335300140
#5089680000
#2335300130
#2026059122
NE 142ND PL.
SILT FENCING
SAWCUT AND
EXCAVATE
BYPASS PIPING
REMOVE EXISTING STORM
DRAINAGE PIPE AND PLUG OUTLET.
INSTALL SUMP PUMP AND ROUTE 12"
ADS TO BYPASS PIPING. INSTALL
STORM DRAIN PROTECTION INSERT.
BYPASS PIPING
SITE PREPARATION NOTES
1. USE KING COUNTY PARCEL FOR CONSTRUCTION STAGING AND ACCESS.
2. CULVERT AND CHANNEL CONSTRUCTION SHOULD BE ACCOMPLISHED USING
THE FOLLOWING PHASES.
3. SEE SHEET P-3 FOR TREE REMOVAL PROCEDURE.
4. CONTRACTOR SHALL PROVIDE PUMP WITH CAPACITY OF 23.1 CFS OR GREATER.
PUMP SHALL BE AVAILABLE FOR USE AT ALL TIMES WHILE STREAM BYPASS IS
ACTIVE.
STREAM BYPASS SEQUENCE:
1. BLOCK DOWNSTREAM REACH FROM FLOW. CONSTRUCT UPSTREAM SANDBAG
AND BULKBAG DAMS AS SHOWN. INSTALL SUMP PUMP WITH FLEXIBLE PIPING
EXTENDING TO DOWNSTREAM PROJECT EXTENT THROUGH EXISTING CULVERT
AS SHOWN.
2. INSTALL BULKBAG ISOLATION AND ENERGY DISSIPATION POOL AT DOWNSTREAM
PROJECT BOUNDARY PER DETAILS ON SHEET GC-1.
3. GRADUALLY DEWATER DOWNSTREAM REACH. COORDINATE WITH WASHINGTON
DEPARTMENT OF FISH AND WILDLIFE FOR FISH EXCLUSION PROCEDURES.
4. SALVAGE VEGETATION AND CLEAR INVASIVE VEGETATION PER THE VEGETATION
PLAN. SEPARATELY STOCKPILE SALVAGED VEGETATION AND NATIVE MATERIALS
FOR USE IN CONSTRUCTION OF MAIN CHANNEL RUNS.
5. GRADE CHANNEL ALIGNMENTS.
6. ONCE NEW CULVERT IS INSTALLED, INSTALL NEW LENGTH OF FLEXIBLE BYPASS
PIPING FROM UPSTREAM TEE OR WYE TO DOWNSTREAM PROJECT BOUNDARY
THROUGH NEW CULVERT AS SHOWN.
7. REMOVE ORIGINAL LENGTH OF BYPASS PIPING THREADED THROUGH EXISTING
CULVERT AND CAP END OF UPSTREAM TEE OR WYE.
BYPASS PIPING
BYPASS PIPING
TEMPORARY BULKBAG DAM
TESC LEGEND
SILT FENCE
SANDBAG/BULKBAG DAM
SILT FENCING1
2
CONNECT BYPASS PIPING
W / WYE OR INSERT TEE
1
1
1
1
1
2
1
CONTRACTOR TO THREAD 30" FLEXIBLE
PIPING THROUGH EXISTING CULVERT
4
LIMITS OF DISTURBANCE
LOD LOD LOD LOD LOD
CONTRACTOR STAGING/LAY-DOWN AREA
SEE COK STD PLAN CK-E.02
REMOVE EXISTING CMP3
SANDBAG DAM1
LOCATION OF PROPOSED
CULVERT AND WINGWALLS
#2026059104
(CITY OF KIRKLAND)
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CONTRACTOR STAGING/LAY-DOWN AREA
CONSTRUCTION
ENTRANCE
REMOVE EXISTING TRASH RACK1
STOCKPILE AREA
CONSTRUCTION ENTRANCE
1
GC-1
1
GC-1
EX TREES TO BE PROTECTED WITH
HIGH-VISIBILITY SILT FENCING
CONSTRUCTION ENTRANCE
TRENCH FOR
LIQUEFACTION MITIGATION
TRENCH FOR
LIQUEFACTION MITIGATION
UPSTREAM BLOCK NET PER
WSDOT FISH EXCLUSION
PROTOCOLS & STANDARDS
DOWNSTREAM BLOCK NET
PER WSDOT FISH EXCLUSION
PROTOCOLS & STANDARDS
1
CONTRACTOR TO THREAD BYPASS
PIPING THROUGH NEW CULVERT
5
INSTALL TEE OR WYE W/ END
PLUG UPSTREAM OF EX CMP
1
SILT FENCING1
6
SILT FENCING 1
BYPASS PIPE
OUTFALL W/ ENERGY
DISSIPATOR
1
S-4
CEDAR CREEK FLOW TABLE
RETURN PERIOD (YEARS) FLOW (CFS)
2 11.5
5 18.4
10 23.1
1
FLOWS AND RETURN PERIODS ARE APPROXIMATE
28287
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Stantec Staniec Consulting Services Inc. 11130 NE 33rd Place Suite 200 Bellevue WA 98004-1465 Tel: (425) 869-9448 www.stantec.com
Copyright Reserved The Contractor shall verify □rld be responsible for all dimensions. DO NOT scale the drawing- any errors or omissions shall be reported to Stantec wi1hout delay. The Copyrights to all de:iigns and drawings are the property of Sh::mtec. Reproduction or use for any purpose other than that authorized by Staniec is forbidden.
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CITY OF KIRKLAND
CEDAR CREEK CULVERT REPLACEMENT
KIRKLAND, WA
File Name: 10451 SP-001 WMt.t
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Title
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SITE PREPARATION AND DEWATERING PLAN
Project No. Scale
AS NOTED
Revision Sheet Drawing No.
8 of SP-1