HomeMy WebLinkAboutVol 2 - Contract Plans_CAG-25-110City Contact:
Troy Solly, PE
(425) 430-7313
tsolly@rentonwa.gov
Award Amount: _____________________
Award Date: _____________________
Award To: _____________________
_____________________
_____________________
Contract No.: CAG-25-110
Maplewood Creek and Madsen Creek
Sediment Basin Cleaning Project 2025-2026
Contract Documents
VOLUME 2 OF 2
Project No.: SWP-27-2057
Approved for Bid
____________________________ ___________
City of Renton Date:
Public Works Department
Utility Systems Division
Renton City Hall—5th Floor
1055 South Grady Way
Renton, Washington 98057
City of Renton
Approved for Construction
____________________________ ___________
City of Renton Date:
April 16, 2025
Maplewood BasinRENTON
I-405
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5
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1
6
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SR-
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6
9
LAKE
WASHINGTON
Madsen Basin
APRIL 2025
SWP-27-2057
DATE 8
DC/TS/TAS
DC/TS/TAS
TAS/JF
TAS
BID SET
4-11-2025
VERTICAL: NAVD 1988
HORIZONTAL: NAD 1983/1991DATEAPPRBYREVISION DESCRIPTIONNO.
Public Works Department
CITY OF RENTONAS NOTED MAPLEWOOD CREEK AND MADSEN CREEK
SEDIMENT BASIN CLEANING PROJECT 2025-2026
C
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RIVER
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1.ALL WORK SHALL BE PERFORMED IN ACCORDANCE WITH APPLICABLE LOCAL,
STATE AND FEDERAL LAWS. SEE THE "STANDARD DETAILS" SECTION OF THE
PROJECT SPECIFICATIONS FOR REFERENCED CITY OF RENTON (COR)
STANDARD DETAILS AND ANY REFERENCED WASHINGTON STATE
DEPARTMENT OF TRANSPORTATION (WSDOT) STANDARD DETAILS. ALL WORK
AND MATERIALS SHALL BE IN ACCORDANCE WITH THE CITY OF RENTON
STANDARDS AND THE CONTRACT SPECIAL PROVISIONS
2.ALL WORK SHALL BE SUBJECT TO INSPECTION BY THE CITY ENGINEER OR
DESIGNATED REPRESENTATIVE.
3.PRIOR TO BEGINNING CONSTRUCTION, THE CONTRACTOR SHALL MEET WITH
THE CITY ENGINEER FOR A PRECONSTRUCTION CONFERENCE.
4.A COPY OF THESE APPROVED PLANS AND PROJECT SPECIFICATIONS MUST BE
ON THE SITE WHENEVER CONSTRUCTION IS IN PROGRESS.
5.THE CITY OF RENTON ASSUMES NO LIABILITY FOR THE ACCURACY OF THE
RECORD INFORMATION. CONTRACTOR SHALL FIELD LOCATE ALL UTILITIES
WITHIN PROPOSED EXCAVATION LIMITS. CONTACT UNDERGROUND UTILITY
LOCATE SERVICE (1-800-454-5555) A MINIMUM OF 48 HOURS PRIOR TO ANY
EXCAVATION TO OBTAIN ON-SITE UTILITY LOCATIONS. CONTRACTOR SHALL
POTHOLE ALL UNDERGROUND GAS, WATER, SERVICE CONNECTIONS, AND ALL
OTHER UNDERGROUND UTILITIES PRIOR TO THE START OF CONSTRUCTION
AND NOTIFY THE ENGINEER OF ANY CONFLICTS. PRECAUTIONS AND
REMEDIAL MEASURES SHALL BE TAKEN AS REQUIRED TO PROTECT PERSONS
AND PROPERTY AND TO AVOID DISRUPTION OF SERVICE. UNLESS OTHERWISE
NOTED, PROTECT ALL UTILITIES FROM DAMAGE WHICH SHALL INCLUDE
PROVIDING TEMPORARY SUPPORT SYSTEMS AND SHORING AROUND
UTILITIES DURING EXCAVATION, IF AN EXISTING PRIVATE UTILITY CONFLICTS
WITH PROPOSED IMPROVEMENTS, COORDINATE THE RELOCATION OF THE
PRIVATE UTILITY WITH THE UTILITY OWNER UNLESS NOTED OTHERWISE OR
DIRECTED BY THE ENGINEER.
6.CONTRACTOR SHALL BE RESPONSIBLE FOR PREPARATION OF TRAFFIC
CONTROL PLANS. CONTRACTOR SHALL SUBMIT PLANS TO ENGINEER FOR
REVIEW AND APPROVAL AT LEAST 10 WORKING DAYS PRIOR TO
IMPLEMENTATION.
7.FOR CLARITY OF DRAWINGS, OVERHEAD POWER AND TELECOM ARE NOT
SHOWN ON THE DRAWINGS. CONTRACTOR IS ADVISED THAT THERE ARE
OVERHEAD POWER AND TELECOM THROUGHOUT PROJECT AREA, INCLUDING
DIRECTLY OVER PROPOSED PIPE IMPROVEMENTS. IT IS THE CONTRACTOR'S
RESPONSIBILITY TO PERFORM THE WORK IN A SAFE MANNER AND IN
ACCORDANCE WITH ANY REQUIREMENTS SET FORTH BY THE UTILITY OWNER
AND APPLICABLE LAWS AND REGULATIONS.
8.NO STAGING AREA IS PROVIDED TO THE CONTRACTOR. ALL STAGING AREAS
SHALL BE ON A CONTRACTOR SECURED AREA. ALL TESC REQUIREMENTS
APPLY TO THE CONTRACTOR'S OBTAINED STAGING AREA.
COVER SHEET C100
1
MAPLEWOOD CREEK AND MADSEN CREEK
SEDIMENT BASIN CLEANING PROJECT 2025-2026
APRIL 2025
CAG-25-110
LOCAITON MAP
NOT TO SCALE
SHEET INDEX
1.C100 - COVER SHEET
MAPLEWOOD CREEK SEDIMENT BASIN
2.C101 - SEDIMENT BASIN MAINTENANCE
3.C102 - MAIN CHANNEL MAINTENANCE
4.C103 - SEDIMENT BASIN BASE GRADES
5.C104 - SEDIMENT BASIN DETAILS
6.C105 - CHANNEL AND FLOW SPLITTER DETAILS
MADSEN CREEK SEDIMENT BASIN
7.C106 - SEDIMENT BASIN MAINTENANCE
8.C107 - SEDIMENT BASIN DETAILS
SHEET INDEX
LIMITS FOR PARKING LOT
USE BY CONTRACTOR
CAUTION - PVC LINER
APPROX. LOCATION
NO
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BYPASS CREEK INTO Ex. 18" PIPE
(TEMPORARY)
SINGLE DUMP TRUCKS ONLY
ACROSS BRIDGE, NO TRAILERS
MATC
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A
SCALE: 1 INCH = 40 FEET
400
GENERAL NOTES
1.TEMPORARY BYPASS DAM SHALL BE WATER TIGHT SO BASIN CAN BE DRAINED AND SEDIMENT CAN BE DRIED OUT.
2.SECOND DAM SHALL BE INSTALLED.
3.FISH RESCUE IN SEDIMENT BASIN SHALL BE OCCUR IMMEDIATELY AFTER THE BYPASS DAM IS INSTALLED.
4.REMOVE SEDIMENT BETWEEN ALL ROCK WEIRS SHALL BE PERFORMED BY USING SMOOTH BUCKET. APPROXIMATE 1 2 TO 2 3 OF ROCK WEIR. HEIGHT
SHALL BE EXPOSED. SEE PHOTOS OF PREVIOUS CLEANING IN CONTRACT PROVISIONS.
5.REMOVE SEDIMENT TO BASE GRADES AT TOP OF IMPORT BACKFILL AND UPSIDE SLOPES SHALL BE PERFORMED USING SMOOTH BUCKET.
6.HAND DICK TO IDENTIFY TOP OF EXISTING IMPORT BACKFILL AND PVC LINER LOCATIONS.
7.EXISTING PVC LINERS ARE APPROXIMATELY LOCATED 1.0 FOOT UNDER THE GRAVEL LAYER AND ARE EXTENDED UP THE SIDE TO EL. 113.2.
8.CAUTION - SOME SEDIMENT REMOVAL AREAS HAVE ONLY 2" TO 3" OF IMPORT BACKFILL ABOVE EXISTING PVC LINER.
9.CAUTION - PVC PIPE AND FABRIC IN EXPOSED NW OF OVERFLOW SPILLWAY. NO GRAVEL COVERING.
10.IMMEDIATELY REMOVE ANY DIRT OR DEBRIS SPILLED IN GOLF COURSE PARKING LOTS AND DRIVING LAND.
11.TRUCK TRAFFIC SHALL STOP AND NOT CROSS BRIDGE WHEN GOLFERS ARE TEEING OGG OF THE 18TH TEE.
12.CITY WILL IDENTIFY WORK AND AREAS FOR VEGETATION AND SEDIMENT REMOVAL CITY MAY ADD, REMOVE, OR ADJUST GRAVEL PLACEMENT,
SEDIMENT REMOVAL, AND VEGETATION CLEANING AREAS AS NEEDED.
CONSTRUCTION KEY NOTES
ADJUST ROCK BERMS AS DIRECTED BY THE ENGINEER.
LEGEND
PROPOSED SEDIMENT BASIN REMOVAL AREA
PROPOSED HYDROSEED AND STRAW MULCH AREA
INSTALL SECOND DAM, SUMP, AND PUMP TO COLLECT SECONDARY FLOW. SEE CONTRACT PROVISIONS.
APPLY HYDROSEED AND STRAW MUCH IN DISTURBED AREAS AFTER CLEANING.
REMOVE SEDIMENT BELOW AND AROUND McCARTHY'S VALVE. CLEAN 4 TO 6 FOOT AROUND IF POSSIBLE.
FILL AND COMPACT BANK AT ANY EROSION LOCATIONS. SEE CONTRACT PROVISIONS.
APRIL 2025
SWP-27-2057
DATE 8
DC/TS/TAS
DC/TS/TAS
TAS/JF
TAS
BID SET
4-11-2025
VERTICAL: NAVD 1988
HORIZONTAL: NAD 1983/1991DATEAPPRBYREVISION DESCRIPTIONNO.
Public Works Department
CITY OF RENTONAS NOTED MAPLEWOOD CREEK AND MADSEN CREEK
SEDIMENT BASIN CLEANING PROJECT 2025-2026
MAPLEWOOD CREEK
REMOVE EXISTING PLYWOOD COVER OVER 42"Ø PIPE. REPLACE WITH NEW 1" THICK MARINE GRADE PLYWOOD WITH NEOPRENE RUBBER SEALS BOLTED
OVER 42"Ø PIPE USING GALVANIZED BOLTS AND EXISTING ANCHORS TO OBTAIN A WATERTIGHT SEAL.
REMOVE APPROX. 4 TO 5 FEET OF ACCUMULATED SEDIMENT. SEE SHEET C103 FOR FINISHED SEDIMENT BASIN BASE GRADES AND SEE SHEET C104 FOR DETAILS.
REMOVE APPROX. 1 TO 2 FEET OF ACCUMULATED SEDIMENT BETWEEN ROCK WEIRS. SEE SHEET C103 FOR FINISHED SEDIMENT BASIN BASE GRADES.
INSTALL TEMPORARY BYPASS DAM FOR CREEK DIVERSION. SEE CONTRACT PROVISIONS AND SHEET C104 FOR DETAILS.
TYPICAL GRAVEL PLACEMENT AREA PER DETAIL 1 ON SHEET C105. COORDINATE WITH CITY TO IDENTIFY
AND REVIEW ALL GRAVEL PLACEMENT AREAS FOR APPROVAL PRIOR TO CONDUCTING WORK.
TYPICAL CHANNEL CLEANING AREA PER DETAIL 3 ON SHEET C105. COORDINATE WITH CITY TO
IDENTIFY AND REVIEW ALL CHANNEL CLEANING AREAS FOR APPROVAL PRIOR TO CONDUCTING WORK.
SEDIMENT BASIN MAINTENANCE C101
2
ACCESS FOR CREEK MAINTENANCE
FROM WEST SIDE ONLY
MATC
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A
APRIL 2025
SWP-27-2057
DATE 8
DC/TS/TAS
DC/TS/TAS
TAS/JF
TAS
BID SET
4-11-2025
VERTICAL: NAVD 1988
HORIZONTAL: NAD 1983/1991DATEAPPRBYREVISION DESCRIPTIONNO.
Public Works Department
CITY OF RENTONAS NOTED MAPLEWOOD CREEK AND MADSEN CREEK
SEDIMENT BASIN CLEANING PROJECT 2025-2026
MAPLEWOOD CREEK
MAIN CHANNEL MAINTENANCE
SCALE: 1 INCH = 40 FEET
400
C102
3
TYPICAL CHANNEL CLEANING AREA PER DETAIL 3 ON SHEET C105. COORDINATE WITH CITY TO
IDENTIFY AND REVIEW ALL CHANNEL CLEANING AREAS FOR APPROVAL PRIOR TO CONDUCTING WORK.
TYPICAL GRAVEL PLACEMENT AREA PER DETAIL 2 ON SHEET C105. COORDINATE WITH CITY TO IDENTIFY
AND REVIEW ALL GRAVEL PLACEMENT AREAS FOR APPROVAL PRIOR TO CONDUCTING WORK.
TYPICAL SEDIMENT AND VEGETATION REMOVAL AREA PER DETAIL 4 ON SHEET C105. COORDINATE WITH CITY TO
IDENTIFY AND REVIEW ALL SEDIMENT AND VEGETATION REMOVAL AREAS FOR APPROVAL PRIOR TO CONDUCTING WORK.
INSTALL TEMPORARY DIVERSION BERM AND REMOVE APPROX 1 TO 2 FEET OF ACCUMULATED SEDIMENT IN
FRONT OF FLOW SPLITTER. SEE CONTRACT PROVISIONS AND SHEET C104 FOR DETAILS.
CONSTRUCTION KEY NOTES
GENERAL NOTES
1.CITY WILL HELP IDENTIFY WORK AND AREAS FOR VEGETATION AND SEDIMENT REMOVAL. CITY MAY ADD, REMOVE,
OR ADJUST GRAVEL PLACEMENT, SEDIMENT REMOVAL, AND VEGETATION CLEANING AREAS AS NEEDED.
2.CONSTRUCTION SHALL NOT INTERFERE WITH GOLF COURSE PLAY AND PARKING LOT USE, EXCEPT FOR CLEANING
THE FLOW SPLITTER, AND AS NOTED OTHERWISE.
3.TRUCK TRAFFIC SHALL STOP AND NOT CROSS BRIDGE WHEN GOLFERS ARE TEEING OFF OF THE 18TH TEE.
4.ONLY SMALL SOFT TIRED VEHICLES MAY BE USED ON THE GOLF COURSE WEST OF THE FLOW SPLITTER.
5.CONTRACTOR SHALL NOT BLOCK CART PATHS AND SHALL YIELD THE RIGHT OF WAY TO GOLF CARTS AND GOLFERS.
6.WORK ON THE CHANNEL AND 10TH AND 11TH FAIRWAYS SHALL NOT INTERFERE WITH GOLF COURSE PLAY.
7.CONTRACTOR SHALL IMMEDIATELY CLEAN ANY DIRT OR DEBRIS SPILLED IN THE GOLF COURSE PARKING LOT AND
DRIVING LANES.
8.CONTRACTOR SHALL AVOID DAMAGING THE GOLF COURSE GROUNDS. ANY DAMAGES SHALL BE REPAIRED BY THE
CONTRACTOR AT HIS EXPENSE, TO THE SATISFACTION OF THE CITY.
0 20
SCALE: 1 INCH = 20 FEET
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1997-98 ORIGINAL CONSTRUCTION
AS-BUILT SURVEY
*
SEDIMENT BASIN CLEANING AS-BUILT 8/5/2014
GENERAL NOTES
1.EXISTING ROCK BERM LOCATIONS ARE APPROXIMATE.
APRIL 2025
SWP-27-2057
DATE 8
DC/TS/TAS
DC/TS/TAS
TAS/JF
TAS
BID SET
4-11-2025
VERTICAL: NAVD 1988
HORIZONTAL: NAD 1983/1991DATEAPPRBYREVISION DESCRIPTIONNO.
Public Works Department
CITY OF RENTONAS NOTED MAPLEWOOD CREEK AND MADSEN CREEK
SEDIMENT BASIN CLEANING PROJECT 2025-2026
MAPLEWOOD CREEK
4SEDIMENT BASIN GRADES C103
4
WEST ACCESS ROAD
APPROX. EL. 115.17
BASIN BOTTOM
APPX EL 108.67/SEE FINISHED SEDIMENT BASIN
BASE GRADES SHEET 3
30 MIL PVC
BASIN LINER
1.0± FT IMPORTED BACKFILL
ABOVE LINER (GRAVEL) *
PVC LINER
APPROX. EL. 113.17
8" PERF.
DRAIN PIPE
ACCUMULATED SEDIMENT
APPROX. EL. 112.0 (VARIES)
* CAUTION - SOME AREAS MAY HAVE 3" OR
LESS OF GRAVEL COVER ABOVE THE LINER
EXISTING INLET
AND BYPASS PIPE
(ON WEST BANK)
SANDBAGS
TO SEAL EDGES
AND ANCHOR PLASTIC
PLASTIC SHEETING
TO SEAL DAMCHANNEL
BOTTOM
FLOW
CONCRETE BLOCKS, MEDIA BAGS,
OR OTHER MATERIAL TO FORM
BYPASS DAM
±2' TO 3'
±2'
OHW
DEPTH APPROX
2 TO 4 INCHES
APRIL 2025
SWP-27-2057
DATE 8
DC/TS/TAS
DC/TS/TAS
TAS/JF
TAS
BID SET
4-11-2025
VERTICAL: NAVD 1988
HORIZONTAL: NAD 1983/1991DATEAPPRBYREVISION DESCRIPTIONNO.
Public Works Department
CITY OF RENTONAS NOTED MAPLEWOOD CREEK AND MADSEN CREEK
SEDIMENT BASIN CLEANING PROJECT 2025-2026
MAPLEWOOD CREEK
EX. CONCRETE
FLOW SPLITTER
BERM FROM SANDBAGS
AND PLASTIC SHEETING
CHANNEL
BOTTOM
FLOW COMING
TOWARD PAGE
2.5'
REMOVE ACCUMULATED
SEDIMENT AND VEGETATION
±1.5'
±1.5'
OHWL
DEPTH 4 INCHES
EX. OVERFLOW
CHANNEL (DRY)
EL 88.0 (MIDDLE)
EL 86 ±
SEDIMENT BASIN AND FLOW SPLITTER DETAILS C104
5
EX. OVERFLOW
CHANNEL (DRY)
TO LOW FLOW
CHANNEL
NO MACHINE ACCESS
THIS SIDE
MACHINERY ALLOWED ON TOP OF
BANK, NOT IN WATER. RESTORE ANY
DAMAGE TO BANK, GRASS, RIP-RAP
AFTER WORK IS COMPLETED
EX. CONCRETE FLOW
SPLITTER STRUCTURE
18TH TEE
FLOW SPLITTER CLEANING DETAIL
NTS
FLOW SPLITTER CLEANING DETAIL - TYPICAL SECTION C-C
LOOKING UPSTREAM - NTS
NOTES
1.CONSTRUCTION SHALL NOT INTERFERE WITH GOLF COURSE PLAY
AND PARKING LOT USE, EXCEPT FOR CLEANING THE FLOW
SPLITTER, AND AS NOTED OTHERWISE.
2.TRUCK TRAFFIC SHALL STOP AND NOT CROSS BRIDGE WHEN
GOLFERS ARE TEEING OFF OF THE 18TH TEE.
3.ONLY SMALL SOFT TIRED VEHICLES MAY BE USED ON THE GOLF
COURSE WEST OF THE FLOW SPLITTER.
4.CONTRACTOR SHALL NOT BLOCK CART PATHS AND SHALL YIELD
THE RIGHT OF WAY TO GOLF CARTS AND GOLFERS.
5.CONTRACTOR SHALL IMMEDIATELY CLEAN ANY DIRT OR DEBRIS
SPILLED IN THE GOLF COURSE PARKING LOT AND DRIVING LANES.
6.CONTRACTOR SHALL AVOID DAMAGING THE GOLF COURSE
GROUNDS. ANY DAMAGES SHALL BE REPAIRED BY THE
CONTRACTOR AT HIS EXPENSE, TO THE SATISFACTION OF THE CITY.
7.ALL TEMPORARY DIVERSION MATERIAL SHALL BE REMOVED AFTER
CLEANING IS COMPLETE.
TYPICAL SECTION THRU MIDDLE OF SEDIMENT BASIN, WEST-EAST
NTS
TEMPORARY BYPASS DAM - MAPLEWOOD
NTS
TEMPORARY BYPASS DAM - TYPICAL SECTION B-B
NTS
NOTES
1.ALL TEMPORARY DIVERSIONS MATERIALS SHALL BE REMOVED AFTER CLEANING IS COMPLETE
EX. BYPASS PIPE
EX. CONCRETE INLET
LIMITED MACHINE ACCESS TO DRY
CHANNEL. RESTORE ANY DAMAGE
TO BANK, GRASS, RIP-RAP AFTER
WORK IS COMPLETED.
REMOVE ACCUMULATED
SEDIMENT
GRAVEL REPLACEMENT SPEC.*
IN HIGH FLOW AREA
SIZE Percent Finer by Weight
12" - 9" 100 - 70%
9" - 6" 70 - 40%
6" - 3" 40 - 20%
<1" 20%
DETAIL 1 - TYPICAL SECTION D-D
LOOKING UPSTREAM - NTS
DETAIL 1 - GRAVEL PLACEMENT
NTS
*NOTE - GRAVEL SIZE AND SPEC. PERCENTAGES MAY BE REVISED BY WDFW
GRAVEL REPLACEMENT SPEC.
IN LOW FLOW AREA
BELOW FLOW SPLITTER *
SIZE Percent Finer by Weight
4"75 - 100%
2" 30 - 75%
1" 0 - 30%
1/4" 0%
*NOTE - GRAVEL SIZE AND SPEC. PERCENTAGES MAY BE REVISED BY WDFW
DETAIL 2 - GRAVEL PLACEMENT
NTS
DETAIL 2 - TYPICAL SECTION B-B
NTS
NOTES
1.CITY WILL HELP IDENTIFY WORK AND AREAS FOR GRAVEL PLACEMENT. THE CITY
MAY REVIEW AND ADJUST GRAVEL PLACEMENT AS NEEDED FOR EACH LOCATION.
2.CONTRACTOR MAY NEED TO REMOVE APPROX. 3' TO 4' WIDTH OF VEGETATION
TO ACCESS CREEK AT EACH LOCATION. REVIEW ANY CLEARING WITH THE CITY
BEFORE PROCEEDING. DO NOT CUT DOWN TREES.
3.ONLY SMALL SOFT TIRED VEHICLES SHALL DELIVER GRAVEL ON GOLF COURSE
(SUCH AS BOBCATS, GOLF CARTS, WHEEL BARROWS).
4.GRAVEL SHALL BE PLACED AT TOP OF WEST BANK ONLY.
5.GRAVEL SHALL BE CARRIED DOWN BANK IN BUCKETS AND SPREAD BY HAND
SHOVEL OVER THE WIDTH OF THE CREEK.
APRIL 2025
SWP-27-2057
DATE 8
DC/TS/TAS
DC/TS/TAS
TAS/JF
TAS
BID SET
4-11-2025
VERTICAL: NAVD 1988
HORIZONTAL: NAD 1983/1991DATEAPPRBYREVISION DESCRIPTIONNO.
Public Works Department
CITY OF RENTONAS NOTED MAPLEWOOD CREEK AND MADSEN CREEK
SEDIMENT BASIN CLEANING PROJECT 2025-2026
MAPLEWOOD CREEK
DETAIL 3 - TYPICAL CHANNEL CLEANING DETAIL
NTS
NOTES
1.CITY WILL HELP IDENTIFY WORK AND AREAS FOR CHANNEL CLEANING. CITY MAY
ADJUST, ADD OR REMOVE, SEDIMENT AND VEGETATION CLEANING AREAS AS
NEEDED.
2.CONTRACTOR MAY NEED TO REMOVE APPROX. 3' TO 4' WIDTH OF VEGETATION
TO ACCESS CREEK AT EACH LOCATION. REVIEW ANY CLEARING WITH THE CITY
BEFORE PROCEEDING. DO NOT CUT DOWN TREES.
3.ONLY SMALL SOFT TIRED VEHICLES SHALL REMOVE SEDIMENT ON GOLF COURSE
(SUCH AS BOBCATS, GOLF CARTS, WHEEL BARROWS).
4.WORK ON THE CHANNEL AND 10TH AND 11TH FAIRWAYS SHALL NOT INTERFERE
WITH GOLF COURSE PLAY.
5.ALL TEMPORARY DIVERSION MATERIAL SHALL BE REMOVED AFTER CLEANING IS
COMPLETE.
PLACE TEMPORARY STAKES
AND FILTER FABRIC FENCE
AROUND LARGE WORK AREAS
REMOVE GRASS, INVASIVE WEEDS & ROOTS
(YELLOW IRIS, BITTERSWEET NIGHTSHADE),
AND SEDIMENT TO GRAVEL BOTTOM BY
HAND LABOR IN AREAS IDENTIFIED BY CITY
GRAVEL CHANNEL BOTTOM
GOLF COURSE
FAIRWAY±4'
PROVIDE TEMP NET OR
SHIELD TO PROTECT
WORKERS FROM GOLF
BALLS. MIN 5' HIGH
DETAIL 4 - TYPICAL SEDIMENT
AND VEGETATION REMOVAL
NTS
, SEE NOTE 2.
THIN VEGETATION IF
NEEDED, SEE NOTE 2.
THIN VEGETATION IF
NEEDED, SEE NOTE 2.
GRAVEL REPLACEMENT SPEC.*
IN LOW FLOW AREA
SIZE Percent Finer by Weight
4"75 - 100%
2" 30 - 75%
1" 0 - 30%
1/4" 0%
EX. BOULDER CLUSTERS
(TYPICAL)
EX. ROOT LOG
TO
P
O
F
B
A
N
K
WATER LINE
EX. ACCUMULATED SEDIMENT
STARTING TO BLOCK CHANNEL
ORDINARY HIGH
EX. TOP OF BANK
EX. TOP OF BANKEX. ROOT LOG
4 FEET
8 FEET
NOTES
1.CITY WILL HELP IDENTIFY WORK AND AREAS FOR VEGETATION
AND SEDIMENT REMOVAL. CITY MAY ADJUST, ADD OR REMOVE,
SEDIMENT AND VEGETATION CLEANING AREAS AS NEEDED.
2.ONLY SMALL SOFT TIRED VEHICLES SHALL REMOVE SEDIMENT
AND VEGETATION ON GOLF COURSE (SUCH AS BOBCATS, GOLF
CARTS, WHEEL BARROWS).
3.WORK ON THE CHANNEL AND 10TH AND 11TH FAIRWAYS SHALL
NOT INTERFERE WITH GOLF COURSE PLAY.
DETAIL 3 - TYPICAL SECTION E-E
LOOKING UPSTREAM - NTS
EX. WIDTH 6 FEET
WATER DEPTH 3"
EX. TOP OF
BANK4 FEET
EX. TOP OF
BANK
WATER DEPTH 3"EX. EAST BANK
EX. ORIGINAL GRAVEL
LAYER 12" THICK
ERODED GRAVEL LEVELWIDTH 8 FEET
EX. TREES AND
SHRUBSEX. TREES AND SHRUBS
PLANTED BY CITY
EX. TREES AND SHRUBS
PLANTED BY CITY
EX. TREES AND SHRUBS
PLANTED BY CITY
MAIN CHANNEL DETAILS C105
6
NOTES
1.CITY WILL HELP IDENTIFY WORK AND AREAS FOR GRAVEL PLACEMENT. THE CITY
MAY REVIEW AND ADJUST GRAVEL PLACEMENT AS NEEDED FOR EACH LOCATION.
2.CONTRACTOR MAY NEED TO REMOVE APPROX. 3' TO 4' WIDTH OF VEGETATION
TO ACCESS CREEK AT EACH LOCATION. REVIEW ANY CLEARING WITH THE CITY
BEFORE PROCEEDING. DO NOT CUT DOWN TREES.
3.GRAVEL SHALL BE PLACED ABOVE THE WATERLINE ON THE WEST BANK OF THE
CREEK BY MACHINE.
4.GRAVEL SHALL BE SPREAD BY HAND SHOVEL OVER THE WIDTH OF THE CREEK.
, SEE NOTE 2.
SEE NOTE 2.
SEE NOTE 2.
SEE NOTE 2.
N
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NO ACCES
S
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S
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NO ACCE
S
S
F
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S
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Mads
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e
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M
a
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s
e
n
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e
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ACCESS BASIN DOWN
THIS SIDE ONLY
UTILITY EASEMENT
SEE NOTE
24"CMP BYPASS PIPE
LOCATION NOT VERIFIED
UTILITY EASEMENT
SEE NOTE
UTILITY EASEMENT
SEE NOTE
SCALE: 1 INCH = 20 FEET
0'20'
GENERAL NOTES
1. PIPE INVERT ELEVATIONS TAKEN FROM PRELIMINARY SITE PLAN, NEW LIFE CHURCH, WEST SIDE
IMPROVEMENTS.
2. BOTTOM OF SEDIMENT BASIN HAS APPROXIMATELY ELEV. 113 AND IS MUCKY. EQUIPMENT NEEDS TO
WORK FROM A GRANULAR PAD TO AVOID SINKING INTO BOTTOM.
3. TEMPORARY BYPASS DAM SHALL BE WATER TIGHT SO BASIN CAN BE DRAINED AND SEDIMENT CAN BE
DRIED OUT. SECOND DAM SHALL BE INSTALLED.
4. FISH RESCUE IN THE SEDIMENT BASIN SHALL OCCUR IMMEDIATELY AFTER THE BYPASS DAM IS INSTALLED.
5. FILL AND COMPACT BANK AT EROSION LOCATIONS OF SEDIMENT BASIN AFTER CLEANING.
6. UTILITY EASEMENT FROM NEW LIFE CHURCH 8/10/09, KING CO. RECORDING # 20091007000046
LEGEND
PROPOSED SEDIMENT REMOVAL AREA.
1-800-424-5555 or 811
APRIL 2025
SWP-27-2057
DATE
UNDERGROUND SERVICE
Call 48 Hours
Before You Dig
8
DC/TS/TAS
DC/TS/TAS
TAS/JF
TAS
BID SET
4-11-2025
VERTICAL: NAVD 1988
HORIZONTAL: NAD 1983/1991DATEAPPRBYREVISION DESCRIPTIONNO.
Public Works Department
CITY OF RENTONAS NOTED MAPLEWOOD CREEK AND MADSEN CREEK
SEDIMENT BASIN CLEANING PROJECT 2025-2026
MADSEN CREEK
CONSTRUCTION NOTES
INSTALL TEMPORARY BYPASS DAM FOR CREEK DIVERSION, SEE SHEET 6 FOR
DETAILS AND CONTRACT PROVISIONS.
INSTALL SECOND DAM, SUMP, AND PUMP TO COLLECT SECONDARY FLOW.
SEE SHEET 6 FOR DETAILS AND CONTRACT PROVISIONS.
REMOVE SEDIMENT APPROX. 6 INCHES BELOW TOP OF LOG DROP. DO NOT
DAMAGE LOGS.
REMOVE SEDIMENT USING SMOOTH BUCKET. SEDIMENT REMOVAL DEPTH IS
APPROXIMATE 3 TO 5 FEET. SEE SHEET 6 FOR FINISHED GRADE.
APPLY HYDROSEED AND STRAW MULCH IN DISTURBED AREAS AFTER BASIN
CLEANING. REVIEW EXTENT WITH CITY BEFORE APPLYING.
FILL AND COMPACT BANK AT EROSION LOCATIONS. SEE CONTRACT
PROVISIONS.
SEDIMENT BASIN MAINTENANCE C106
7
PROPOSED HYDROSEED AND STRAW MULCH AREA
EAST ACCESS ROAD
APPROX. EL. 122
RIP-RAP LAYER
±1-FOOT THICK
ACCUMULATED SEDIMENT
DEPTH VARIES
BASIN BOTTOM
APPROX. EL.
113/FINISHED GRADE
±3'
24" CMP BYPASS
PIPE LOC UNK
2H TYP.
WEST SIDE
1V
1-800-424-5555 or 811
APRIL 2025
SWP-27-2057
DATE
UNDERGROUND SERVICE
Call 48 Hours
Before You Dig
8
DC/TS/TAS
DC/TS/TAS
TAS/JF
TAS
BID SET
4-11-2025
VERTICAL: NAVD 1988
HORIZONTAL: NAD 1983/1991DATEAPPRBYREVISION DESCRIPTIONNO.
Public Works Department
CITY OF RENTONAS NOTED MAPLEWOOD CREEK AND MADSEN CREEK
SEDIMENT BASIN CLEANING PROJECT 2025-2026
MADSEN CREEK
EXISTING INLET
AND BYPASS PIPE
(ON EAST BANK)
SANDBAGS
TO SEAL EDGES
AND ANCHOR PLASTIC
PLASTIC SHEETING
TO SEAL DAMCHANNEL
BOTTOM
FLOW
CONCRETE BLOCKS, MEDIA BAGS,
OR OTHER MATERIAL TO FORM
BYPASS DAM
±3'
±2'
OHW
DEPTH APPROX.
4 INCHES
TEMPORARY BYPASS DAM - TYPICAL SECTION B-B
NTS
NOTES
1.ALL TEMPORARY DIVERSIONS MATERIALS SHALL BE REMOVED AFTER CLEANING IS COMPLETE
TYPICAL SEDIMENT BASIN CROSS SECTION A-A
NTS
TEMPORARY BYPASS DAM - MADSEN
NTS
SEDIMENT BASIN DETAILS C107
8
