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City of Renton - Surface Water Utility
Maplewood Creek Sediment Basin and Fish Channel Projects
The projects were constructed by the City Of Renton, as recommended in the Lower Cedar
River Basin And Non-point Pollution Action Plan (CIP 3123). The projects were done in
conjunction with WSDOT's installation of a fish ladder from the Cedar River under SR 169.
Existing Conditions
The old sediment basin was constructed with concrete blocks and earth banks, had a surface
area of about 4,000 sf., and was 2 to 3 feet deep. It tended to fill rapidly with sediment. During
heavy storms, gravel would be washed through the basin and deposited in the creek on the golf
course and in downstream culverts. On occasion, the gravel clogged the creek and caused it to
overflow onto the golf course and SR-169.
About 300 feet upstream of the old sediment basin was an old irrigation dam. The dam was
about 8 feet high. The dam was no longer used and sediments had filled in the entire volume
behind it.
The existing creek channel on the golf course runs relatively straight from the old sediment
basin to a culvert under SR-169. The creek has sparse habitat vegetation along its sides and
does not provide much habitat value. The creek runs to a culvert under SR-169 and a 72-inch
diameter pipe. The 72-inch pipe runs to the west for 800 feet, where it discharges to the Cedar
River. Fish migration up the pipe is relatively difficult due to the poor entrance at the Cedar
River and the difficulty for fish to migrate up a long, dark pipe.
Sediment Basin
Purpose: Construct a new sediment basin that will be more effective than the existing basin in
trapping sediment and preventing it from reaching the golf course and Cedar River. Remove
the existing sediment basin and old dam and replace them with a new fish-passable structure.
Design: The new basin has a design surface area of 13,000 sf. (100-year flow), a storage
volume of 49,000 cf., and a design depth of 5.2 feet. The new basin is approximately 3 times
larger than the old sediment basin. An average of 13,000 to 16,000 cf. of sediment may
accumulate each year. Sediment removal may occur every 2 to 3 years.
The mean monthly flows for Maplewood Creek range from 1 cfs in the summer to 6 cfs in the
winter. The peak flow for the 100-year storm event is 197 cfs (current conditions, HSPF).
The fish ladder has a low flow capacity of 17 cfs and a maximum flow capacity of 64 cfs. The
overflow spillway has a design capacity of 360 cfs.
Schedule: Planning started in 1990 after the January 1990 storm and floods. A FEMA Grant
for preliminary design was approved in 1993. Construction started in September 1996 and was
completed in November 1997.
Cost: Construction $620,000 Engr. Design $110,000 Permit/Admin. $ 60,000
Total Cost: $790,000 FEMA Grant $396,000 City Funds $394,000
Page 1
Fish Channel
Purpose: Provide a fish-passable channel to allow salmon to migrate from the Cedar River to
Maplewood Creek. Provide better spawning and rearing habitat on the golf course. The Fish
Channel will connect to the WSDOT fish ladder under SR-169.
Schedule: Conceptual planning was done in conjunction with the Sediment Basin.
Engineering Design began in 1995. Construction started August 1998 and was completed in
January 1999.
Design: The new channel on the golf course is about 1,400 feet long, 25 feet wide (top of
bank), and 4 feet deep. The channel slope ranges from 0.2 percent to 2.5 percent. During low
flow periods, the water depth in the channel is 6 to 8 inches. The plantings along the channel
include Vine Maple, Tall Oregon Grape, Salal, Red-twig Dogwood, and Pyramid Spirea.
The splitter structure on the golf course was designed to divert low flow (the first 20 cfs) to the
new channel. The new channel has a design capacity of about 45 cfs, which matches the
capacity of the WSDOT culvert and fish ladder.
Cost: Construction $ 960,000 Engr. Design $ 160,000 Permit/Admin. $ 90,000
Total Cost $1,210,000 City Funds $1,210,000
H:DIV/UTIUDOCS/1999/99-380/DC:If
Page 2
/ '
New Sediment Basin
END CONSTRUCTION AT Old Sediment Basin
FISH LADDER (// ''I•
SEE SHEETS 15 k 16
SCALE 0 40 8I0 160 FEET North /
I
1' Bo' /. .�' \ 0 1
EXCEPT AS NOTED j Old Club House EXISTINC SPIV"JAY
,.L �; I — `�
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UPPER FISH CHANNEL
1 :1 '1� \
SEE SHEETS 6
•P1J No" RE- _
/
PK 4AI
c 9
BORE
HOLE 10
.l
New Fish Channel ,` =' ,�
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HOLE 9 _ V
A 5T c.RWA` r �nAPLE`nCC.p
/-LOWER.nSH CHANNEL 3_
SEE SHEETS 3. 4 k 5 ;RO FAA 'p ` �?CCS cR P
T 1 BORE
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BORE
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HOLE
MOLE s / : _�;� CITY OF RENTON
DEPARTMENT OF PUBLIC 1►ORKS
L Ex!SnNC- FIS\-ADDER �a Imo/. MAPLEWOM CREEK FISH CHANNEL PROJECT
Old Creek Channel /;
PROJECT SITE PLAN
CONt:``W,ALL-� VAULT ^� OCSwKEP. wa aTE: Th/se ME RNKE:gill
DPIAIM elm
CEDAR RIVER F+1�,, �O /ii:" oaCKco SCALE
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: CE
SQ •i APPROVED SHEET: 2 OF:22
CONTAINER STOCK
AS REO'D TO 3.0' 2.0' 2.0' PLANTING GROUP 1
EXISTING GROUND
CUTTINGS
( I PLANTING GROUP 2
O `
I 2
I �
u, I 20 1
2 1 TYP
�lI —
r
Typical Section - Lower Channel
AS REO'D
4.0' 20' � 2.0 4.0' FOR ROCK WALL
PLACEMENT TYP.
EXISTING GROUND I MINIMIZE DISTURBED
AREA, RESTORE PER PLAN
UNDISTURBED GROUND
r SEE PLAN FOR TOP
OF BANK TREATMENT,
HYDROSEED. S00 OR
---- --------- ------'�- GRAVEL TYP
--------------
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EXISTING GROUND \
VARIES: SEE PLAN/PROFILE
SHEETS 4 OR 5�\ BOX CULVERT/
\ CHANNEL
MAX
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Box Culvert Crossing
B - B
TYPICAL 6' X 4' BOX CULVERT
CHANNEL, SYMMETRICAL
LOW FLOW NOTCH DETAIL 8-0
E 7-0 5-0" ATTACH GEOTEXTILE (NICOLON 570
18"0 MIN. UPPER LOG 2'_0 OR EQUAL) TO UPPER LOG WITH ,
SEE SHEET 5 FOR CREST ELEV. TOE OF SLOPE I 2 X 4 PRESSURE TREATED WOOD
ON S CLEAT, FULL LOG LENGTH TYP
SIDE CD/
______ I i FL
DRILL 1 3/8"0 HOLE O 30%
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LEVELING SHIM E-E _
18'0 MIN. SEAL LOG
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2' THICK RIPRAP ON E
DOWNSTREAM SIDE OF LOGS. ��� Log Drop, Profile and Section
SEE PLAN FOR EXTENTS B-B
w. F
r.
TAP-
• • Basin, • Sediment • I • I Capacity
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New Basin, Left
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Installing New Box Culvert For Crossing
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J
City of Renton - Surface Water Utility
Maplewood Creek Sediment Basin and Fish Channel Projects
The projects were constructed by the City Of Renton, as recommended in the Lower Cedar
River Basin And Non-point Pollution Action Plan (CIP 3123). The projects were done in
conjunction with WSDOT's installation of a fish ladder from the Cedar River under SR 169.
Existing Conditions
The old sediment basin was constructed with concrete blocks and earth banks, had a surface
area of about 4,000 sf., and was 2 to 3 feet deep. It tended to fill rapidly with sediment. During
heavy storms, gravel would be washed through the basin and deposited in the creek on the golf
course and in downstream culverts. On occasion, the gravel clogged the creek and caused it to
overflow onto the golf course and SR-169.
About 300 feet upstream of the old sediment basin was an old irrigation dam. The dam was
about 8 feet high. The dam was no longer used and sediments had filled in the entire volume
behind it.
The existing creek channel on the golf course runs relatively straight from the old sediment
basin to a culvert under SR-169. The creek has sparse habitat vegetation along its sides and
does not provide much habitat value. The creek runs to a culvert under SR-169 and a 72-inch
diameter pipe. The 72-inch pipe runs to the west for 800 feet, where it discharges to the Cedar
River. Fish migration up the pipe is relatively difficult due to the poor entrance at the Cedar
River and the difficulty for fish to migrate up a long, dark pipe.
Sediment Basin
Purpose: Construct a new sediment basin that will be more effective than the existing basin in
trapping sediment and preventing it from reaching the golf course and Cedar River. Remove
the existing sediment basin and old dam and replace them with a new fish-passable structure.
Design: The new basin has a design surface area of 13,000 sf. (100-year flow), a storage
volume of 49,000 cf., and a design depth of 5.2 feet. The new basin is approximately 3 times
larger than the old sediment basin. An average of 13,000 to 16,000 cf. of sediment may
accumulate each year. Sediment removal may occur every 2 to 3 years.
The mean monthly flows for Maplewood Creek range from 1 cfs in the summer to 6 cfs in the
winter. The peak flow for the 100-year storm event is 197 cfs (current conditions, HSPF).
The fish ladder has a low flow capacity of 17 cfs and a maximum flow capacity of 64 cfs. The
overflow spillway has a design capacity of 360 cfs.
Schedule: Planning started in 1990 after the January 1990 storm and floods. A FEMA Grant
for preliminary design was approved in 1993. Construction started in September 1996 and was
completed in November 1997.
Cost: Construction $620,000 Engr. Design $110,000 Permit/Admin. $ 60,000
Total Cost: $790,000 FEMA Grant $396,000 City Funds $394,000
Page 1
Fish Channel
Purpose: Provide a fish-passable channel to allow salmon to migrate from the Cedar River to
Maplewood Creek. Provide better spawning and rearing habitat on the golf course. The Fish
Channel will connect to the WSDOT fish ladder under SR-169.
Schedule: Conceptual planning was done in conjunction with the Sediment Basin.
Engineering Design began in 1995. Construction started August 1998 and was completed in
January 1999.
Design: The new channel on the golf course is about 1,400 feet long, 25 feet wide (top of
bank), and 4 feet deep. The channel slope ranges from 0.2 percent to 2.5 percent. During low
flow periods, the water depth in the channel is 6 to 8 inches. The plantings along the channel
include Vine Maple, Tall Oregon Grape, Salal, Red-twig Dogwood, and Pyramid Spirea.
The splitter structure on the golf course was designed to divert low flow (the first 20 cfs) to the
new channel. The new channel has a design capacity of about 45 cfs, which matches the
capacity of the WSDOT culvert and fish ladder.
Cost: Construction $ 960,000 Engr. Design $ 160,000 Permit/Admin. $ 90,000
Total Cost $1,210,000 City Funds $1,210,000
H:D IV/UTI UDOCS/1999/99-380/DC:If
Page 2
r �
New Sediment Basin
END CONSTRUCTION AT ,� ,y Old Sediment Basin
FISH LADDER
SEE SHEETS 15 k 16 !j
SCALE 0 40 80 160 FEET North /
I I I
1" 60' y.%� �•. 0 I
EXCEPT AS NOTED
Old Club House EXISTING SPILLWAY
r I
t E`ISTiNG EMBANKMI
grit �"- EN
\ /
3rri'• ERR f wsnNC
UILDIN
Ar
i i t / ,• ,/ UPPER FISH CHANNEL
SEE SHEETS 6
-Iew ING''•CRE. •4
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BORE
HOLE 10
.l
New Fish Channel �`�'
BORE
HOLE 9
A 5T4 FA:RWA` r 'IR11 ( MA�LE,vC
*} LOWER FISH CHANNEL 9
f rSEE SHEETS 3. 4 h 5 3
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n HOLE �J l \ HQL•E 6 Splitter Structure
6 \ E.(1j Nv
19 CAnT PATH 4TH yIRWAY — __ ____�• ``_ �� ( NAY,'
BORE 4r
I•i/ („��, •HOLE Q ,'
BORE
CITY OF RENTON
FiR
DEPARTMENT OF PUBLIC WORKS
L— EA!ST1NG F!iH -ADDER
a CONCRETE NAI_ �-y annel �;,' MAPLEWOOD CREEK FISH CHANNEL PROJECT
Old Creek Ch PROJECT SITE PLAN
WELL I .
R `�-VAULT /
CONI:`�WALI.J v DES'EP. wo DATE 7/1/M RE wwE.9rEE1Ct
n
p1A"11: OWI
CEDAR RIVER Fx 1? b oacuE& 017 As 9a""
SQ / APPROVIM SNEE7: : Di:n
�' --- ---
CONTAINER STOCK
PLANTING GROUP 1
AS REO'D TO 3.0' 2.0' 2.0'
~—EXISTING_GROUND -I- -
iCUTTINGS
1 0l PLANTING CROUP 2-�l
1 2
� �1 �
tii} i 1 20 -- 1
2 TYP
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Am
Typical Section - Lower Channel
AS REO'D
4.0' 20' 20' 4.0' FOR ROCK WALL I
PLACEMENT TYP.
EXISTING GROUND MINIMIZE DISTURBED
AREA, RESTORE PER PLAN
/ I UNDISTURBED GROUND
r SEE PLAN FOR TOP
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HYDROSEED, SOD OR
---�--- -------1 - GRAVEL TYP
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SLOPE UP OR DOWN AS
REO'D (4S MAX),TO MATCH T.O. .
CULVERT TYP; SEE NOTE 2--�
EXISTING GROUND \
VARIES: SEE PLAN/PROFILE
SHEETS 4 OR 5�\ BOX CULVERT/
CHANNEL S>4X Mlky-
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TYPICAL 6' X 4' BOX CULVERT
CHANNEL SYMMETRICAL
13*-0"
LOW FLOW NOTCH DETAIL 8'-0' ,
E 7'-0" 5'-0' ATTACH GEOTEXTILE (NICOLON 570
18�� MIN. UPPER LOG 2'-0 OR EQUAL) TO UPPER LOG WITH
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SEE SHEET 5 FOR CREST ELEV. E ON D SLOPE I 2 X 4 PRESSURE TREATED W000
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SIDE OF'LOG I FL
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DRILL 1 3/8'o HOLE O 30'. �-
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LOGS AND EMBED INTO CREEK
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18'0 MIN. SEAL LOG `0,
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City of Renton - Surface Water Utility
Maplewood Creek Sediment Basin and Fish Channel Projects
The projects were constructed by the City Of Renton, as recommended in the Lower Cedar
River Basin And Non-point Pollution Action Plan (CIP 3123). The projects were done in
conjunction with WSDOT's installation of a fish ladder from the Cedar River under SR 169.
Existing Conditions
The old sediment basin was constructed with concrete blocks and earth banks, had a surface
area of about 4,000 sf., and was 2 to 3 feet deep. It tended to fill rapidly with sediment. During
heavy storms, gravel would be washed through the basin and deposited in the creek on the golf
course and in downstream culverts. On occasion, the gravel clogged the creek and caused it to
overflow onto the golf course and SR-169.
About 300 feet upstream of the old sediment basin was an old irrigation dam. The dam was
about 8 feet high. The dam was no longer used and sediments had filled in the entire volume
behind it.
The existing creek channel on the golf course runs relatively straight from the old sediment
basin to a culvert under SR-169. The creek has sparse habitat vegetation along its sides and
does not provide much habitat value. The creek runs to a culvert under SR-169 and a 72-inch
diameter pipe. The 72-inch pipe runs to the west for 800 feet, where it discharges to the Cedar
River. Fish migration up the pipe is relatively difficult due to the poor entrance at the Cedar
River and the difficulty for fish to migrate up a long, dark pipe.
Sediment Basin
Purpose: Construct a new sediment basin that will be more effective than the existing basin in
trapping sediment and preventing it from reaching the golf course and Cedar River. Remove
the existing sediment basin and old dam and replace them with a new fish-passable structure.
Design: The new basin has a design surface area of 13,000 sf. (100-year flow), a storage
volume of 49,000 cf., and a design depth of 5.2 feet. The new basin is approximately 3 times
larger than the old sediment basin. An average of 13,000 to 16,000 cf. of sediment may
accumulate each year. Sediment removal may occur every 2 to 3 years.
The mean monthly flows for Maplewood Creek range from 1 cfs in the summer to 6 cfs in the
winter. The peak flow for the 100-year storm event is 197 cfs (current conditions, HSPF).
The fish ladder has a low flow capacity of 17 cfs and a maximum flow capacity of 64 cfs. The
overflow spillway has a design capacity of 360 cfs.
Schedule: Planning started in 1990 after the January 1990 storm and floods. A FEMA Grant
for preliminary design was approved in 1993. Construction started in September 1996 and was
completed in November 1997.
Cost: Construction $620,000 Engr. Design $110,000 Permit/Admin. $ 60,000
Total Cost: $790,000 FEMA Grant $396,000 City Funds $394,000
Page 1
Fish Channel
Purpose: Provide a fish-passable channel to allow salmon to migrate from the Cedar River to
Maplewood Creek. Provide better spawning and rearing habitat on the golf course. The Fish
Channel will connect to the WSDOT fish ladder under SR-169.
Schedule: Conceptual planning was done in conjunction with the Sediment Basin.
Engineering Design began in 1995. Construction started August 1998 and was completed in
January 1999.
Design: The new channel on the golf course is about 1,400 feet long, 25 feet wide (top of
bank), and 4 feet deep. The channel slope ranges from 0.2 percent to 2.5 percent. During low
flow periods, the water depth in the channel is 6 to 8 inches. The plantings along the channel
include Vine Maple, Tall Oregon Grape, Salal, Red-twig Dogwood, and Pyramid Spirea.
The splitter structure on the golf course was designed to divert low flow (the first 20 cfs) to the
new channel. The new channel has a design capacity of about 45 cfs, which matches the
capacity of the WSDOT culvert and fish ladder.
Cost: Construction $ 960,000 Engr. Design $ 160,000 Permit/Admin. $ 90,000
Total Cost $1,210,000 City Funds $1,210,000
H:DI V/UTI UDOCS/1999/99-380/DC:If
Page 2
New Sediment Basin
END CONSTRUCTION AT �"—� ; Old Sediment Basin
FISH LADDER .t -
SEE SHEETS 15 k 16 II ,
SCALE 0 40 80 160 FEET Northo
EXCEPT AS NOTED
Old Club House ,L / �� — �Exsnn;r, SPILLWAY
I
� t E`nSTAG EM9ANKtt
I
36�SE sR I XISnNC a"
UILDIN
� v
71.
UPPER FISH CHANNEL
1 '� \� SEE SHEETS 6
IeU ING'CRE ;
PK,.Al
BORE
HOLE 10
New Fish Channel
BORE
\ HOLE 9
A y FGIR WA`
LOWERri'ISH CHANNEL MA-LE-NC::•
SEE $MEETS 3. 4 h 5 ;r'D FAiP,w^� �-SCCS EER
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MaE s CITY OF RENTON
n
DEPARTMENT OF PVBLSC AORKS
i'E :ADDER ��
CNCIS 7 AD L r-YMAPLEWOOD CREEK FISH CHANNEL PROJECT
-NCaE
\ % \ Old Creek Channel . PROJECT SITE PLAN
- WE
'�/,, i
R \ `�W11L1. / `\-VAULT
COW. DATE,
/ !iL HWE 9EFfit
J v cEsicHm ago E 7/t/"
CEDAR RIVER Fx 1? b o xm oc*
AS 9HOVW H60�OOik 1Yah
S`O \ j,j' � Aprgp�p. SHEET: 2 Oi:n
` CONTAINER STOCK
PLANTING GROUP 1
AS REO'D TO 3.0' 2.0' 2.0'
EXISTING GROUND
i CUTTINGS
ZI PLANTING GROUP 2
, O3
2
�L Io
/il I 20 _ 1
1
2 TYP
Typical Section - Lower Channel
AS REO'D
4:0' 2.0' 2.0 4.0' FOR ROCK WALL
PLACEMENT TYP.
EXISTING MINIMIZE DISTURBED
GROUND
AREA. RESTORE PER PLAN
UNDISTURBED GROUND
r SEE PLAN FOR TOP
`\ I OF BANK TREATMENT,
HYDROSEED, SOD OR
----�"--------- --- - - GRAVEL TYP
ROCK WALL
3-MAN ROCKS. TYP, l I.E. r 8O
VARY DIAMETER OF 0'0 6 VARIES,' 6 00� 6 COMPACTED GRANULAR
ROCK TO MATCH 0 ROFRE ocb 1 BACKFILL
EXISTING GROUND O 2 , 2 EXCAVAT-AS STEEPLY
AS POSSIBLE, TYP.
oQ ROCKERY BACKFILL, TYP.
00
CONJRUC77AN GrOrF- T"4e
O:
Ir 4
Fairway Crossing
SLOPE UP OR DOWN AS
REO'D(4X MAX).TO MATCH T.O. .
CULVERT TYP. SEE NOTE 2-1
EXISTING GROUND \
VARIES: SEE PLAN/PROFILE
SHEETS 4 OR 5-7\ BOX CULVERT/
CHANNEL S�4X MA)L
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6'-0"
Box Culvert Crossing
B - B
TYPICAL 6' X 4' BOX CULVERT
CHANNEL, SYMMETRICAL
LOW FLOW NOTCH DETAIL ,
ATTACH GEOTEXTILE (NICOLON 570
18"•MIN. UPPER LOG 2'-0' OR EQUAL) TO UPPER LOG WITH ,
SEE SHEET 5 FOR CREST ELEV. i QtOF LOPE ` 2 X 4 PRESSURE TREATED WOOD
/ -- CLEAT, FULL LOG LENGTH TYP
SIDE Of lOG __ FL
I
DRILL 1 3/8"o HOLE O 30',
DRIVE (2) N70 REBAR THROUGH
1 i LOGS AND EMBED INTO CREEK
BED AT LEAST 4' TYP
LEVELING SHIMS, SEE SECTION E-E
IWO MIN. SEAL LOG J
FIO REBAR (2 REQ'0) C
2' THICK RIPRAP ON C /
DOWNSTREAM SIDE OF LOGS, �% Log Drop, Profile and Section
SEE PLAN FOR EXTENTS B-B
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City of Renton - Surface Water Utility
Maplewood Creek Sediment Basin and Fish Channel Projects
The projects were constructed by the City Of Renton, as recommended in the Lower Cedar
River Basin And Non-point Pollution Action Plan (CIP 3123). The projects were done in
conjunction with WSDOT's installation of a fish ladder from the Cedar River under SR 169.
Existing Conditions
The old sediment basin was constructed with concrete blocks and earth banks, had a surface
area of about 4,000 sf., and was 2 to 3 feet deep. It tended to fill rapidly with sediment. During
heavy storms, gravel would be washed through the basin and deposited in the creek on the golf
course and in downstream culverts. On occasion, the gravel clogged the creek and caused it to
overflow onto the golf course and SR-169.
About 300 feet upstream of the old sediment basin was an old irrigation dam. The dam was
about 8 feet high. The dam was no longer used and sediments had filled in the entire volume
behind it.
The existing creek channel on the golf course runs relatively straight from the old sediment
basin to a culvert under SR-169. The creek has sparse habitat vegetation along its sides and
does not provide much habitat value. The creek runs to a culvert under SR-169 and a 72-inch
diameter pipe. The 72-inch pipe runs to the west for 800 feet, where it discharges to the Cedar
River. Fish migration up the pipe is relatively difficult due to the poor entrance at the Cedar
River and the difficulty for fish to migrate up a long, dark pipe.
Sediment Basin
Purpose: Construct a new sediment basin that will be more effective than the existing basin in
trapping sediment and preventing it from reaching the golf course and Cedar River. Remove
the existing sediment basin and old dam and replace them with a new fish-passable structure.
Design: The new basin has a design surface area of 13,000 sf. (100-year flow), a storage
volume of 49,000 cf., and a design depth of 5.2 feet. The new basin is approximately 3 times
larger than the old sediment basin. An average of 13,000 to 16,000 cf. of sediment may
accumulate each year. Sediment removal may occur every 2 to 3 years.
The mean monthly flows for Maplewood Creek range from 1 cfs in the summer to 6 cfs in the
winter. The peak flow for the 100-year storm event is 197 cfs (current conditions, HSPF).
The fish ladder has a low flow capacity of 17 cfs and a maximum flow capacity of 64 cfs. The
overflow spillway has a design capacity of 360 cfs.
Schedule: Planning started in 1990 after the January 1990 storm and floods. A FEMA Grant
for preliminary design was approved in 1993. Construction started in September 1996 and was
completed in November 1997.
Cost: Construction $620,000 Engr. Design $110,000 Permit/Admin. $ 60,000
Total Cost: $790,000 FEMA Grant $396,000 City Funds $394,000
Page 1
Fish Channel
Purpose: Provide a fish-passable channel to allow salmon to migrate from the Cedar River to
Maplewood Creek. Provide better spawning and rearing habitat on the golf course. The Fish
Channel will connect to the WSDOT fish ladder under SR-169.
Schedule: Conceptual planning was done in conjunction with the Sediment Basin.
Engineering Design began in 1995. Construction started August 1998 and was completed in
January 1999.
Design: The new channel on the golf course is about 1,400 feet long, 25 feet wide (top of
bank), and 4 feet deep. The channel slope ranges from 0.2 percent to 2.5 percent. During low
flow periods, the water depth in the channel is 6 to 8 inches. The plantings along the channel
include Vine Maple, Tall Oregon Grape, Salal, Red-twig Dogwood, and Pyramid Spirea.
The splitter structure on the golf course was designed to divert low flow (the first 20 cfs) to the
new channel. The new channel has a design capacity of about 45 cfs, which matches the
capacity of the WSDOT culvert and fish ladder.
Cost: Construction $ 960,000 Engr. Design $ 160,000 Permit/Admin. $ 90,000
Total Cost $1,210,000 City Funds $1,210,000
H:D I V/UTI UDOC S/1999/99-380/DC:If
Page 2
i
New Sediment Basin
/
END LADS RucnoN AT /�� Old Sediment Basin
FISH LADDER SEE SHEETS 15 & 16 ,
SCALE 0 40 80 160 FEET North �� !
I I I 9 1•''/ I I
I' . 80' t
EXCEPT AS NOTED
Old Club House L i f — EZISnhr SPILLwAr
I
4 E:a STING EMBANKM
FFYYXISnNG
"- ERR t UILDIN
i✓ O .. � err/
UPPER FISH CHANNEL
\ SEE SHEETS 6
J ,
9—
BORE
HOLE 10
New Fish Channel w�1
BORE
\ HOLE 9
q 5TH FAIRWA` - ==_ MA-LE,NOC
LOWERMSH CHANNEL I
*}_ SEE SHEETS 3, 4 & 5 ;r0 FAIRN 'C BCOSfER ?u
BORE y `vlj STA T:'N
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6
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�6,9 CAnT ?ATH �� 4TH W.AY _ • 1
BORE j
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BORE -
'f I 1 /
xaE s ' CITY OF ON
/ �•��6" FIR I I I
�� \ �,r%% DEPARTMENT OF PUBLIC WORKS
EZIsnNG FIS .ADDER \ MAPLEWOOD CREEK FISH CHANNEL PROJECT
` T CONCREE 17AL, r`fir
@\! Old Creek Channel j�; PROJECT SITE PLAN
A'-- WELL 11
.-VAULT aTL T/1/aa
\ CON::�'w,au.-� ^' ocslcnco cua nt n,uc_vcrrm
CEDAR RIVER
pIECxE9: W ov sovE As show« rna wot ..a:
AAPRO'+Io: SHEET; 2 or:22
CONTAINER STOCK
PLANTING GROUP 1
AS REO'D 70 � 3.0 2.0' 2.0' I
EX~-- ISTING GROUND
i CUTTINGS
PLAN TINC CROUP 2-�
ViY I 1 40 1
2 TYP
Typical Section - Lower Channel
AS REO'D
4.0' 2.0' 2.0' 4.0' FOR ROCK WALL
� PLACEMENT TYP.
EXISTING GROUND I MINIMIZE DISTURBED
AREA, RESTORE PER PLAN
UNDISTURBED GROUND
r SEE PLAN FOR TOP
OF BANK TREATMENT.
HYDROSEED. SOD OR
---- — GRAVEL TYP
ROCK WALL -------
�o oa 1 1
3-MAN ROCKS. TYP. 1 I.E. �o
VARY DIAMETER OF O 6 VARIES,' o COMPACTED GRANULAR
°° SEE oo. 6
ROCK TO MATCH PROFlLE ocb 1 BACKFlLL
EXISTING GROUND O Z 2 EXCAVATE AS STEEPLY
o
AS POSSIBLE. TYP.
. 0Q ROCKERY BACKnu- TYP.
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Fairway Crossing
SLOPE UP OR DOWN AS
REO'D (4%MAX)TO MATCH T.O.
CULVERT TYP: SEE NOTE 2
EXISTING GROUND \
VARIES: SEE PLAN/PROFILE
SHEETS 4 OR 5-7\ BOX CULVERT/
CHANNEL
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6'-0'
Box Culvert Crossing
B - B
TYPICAL 6' X 4' BOX CULVERT
CHANNEL, SYMMETRICAL
8'-O"
LOW FLOW NOTCH DETAIL
E� 7'-0" 5'-0 ATTACH GEOIEXTILE (NICOLON 570
18'e MIN. UPPER LOG 2'-0' OR EQUAL) TO UPPER LOG WITH
SEE SHEET 5 FOR CREST ELEV. T OND SSE 2 X 4 PRESSURE TREATED WOOD
CLEAT. FULL LOG LENGTH TYR
I
SIDE D�LOG i
-- ------- --------- ------ ----- -------- I FL
2 TYP. DRILL 1 3/8.0 HOLE O 30'.
DRIVE (2) f10 REBAR THROUGH
1 ' Ik LOGS AND EMBED INTO CREEK
BED AT LEAST 4' TYP
LEVELING SHIMS, SEE SECTION E-E -
18*0 MIN. SEAL LOG
/10 REBAR (2 REO'D) C
2' THICK RIPRAP ON E �/
DOWNSTREAM SIDE OF LOGS, Log Drop, Profile and Section
SEE PLAN FOR EXTENTS B-B
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City of Renton - Surface Water Utility
Maplewood Creek Sediment Basin and Fish Channel Projects
The projects were constructed by the City Of Renton, as recommended in the Lower Cedar
River Basin And Non-point Pollution Action Plan (CIP 3123). The projects were done in
conjunction with WSDOT's installation of a fish ladder from the Cedar River under SR 169.
Existing Conditions
The old sediment basin was constructed with concrete blocks and earth banks, had a surface
area of about 4,000 sf., and was 2 to 3 feet deep. It tended to fill rapidly with sediment. During
heavy storms, gravel would be washed through the basin and deposited in the creek on the golf
course and in downstream culverts. On occasion, the gravel clogged the creek and caused it to
overflow onto the golf course and SR-169.
About 300 feet upstream of the old sediment basin was an old irrigation dam. The dam was
about 8 feet high. The dam was no longer used and sediments had filled in the entire volume
behind it.
The existing creek channel on the golf course runs relatively straight from the old sediment
basin to a culvert under SR-169. The creek has sparse habitat vegetation along its sides and
does not provide much habitat value. The creek runs to a culvert under SR-169 and a 72-inch
diameter pipe. The 72-inch pipe runs to the west for 800 feet, where it discharges to the Cedar
River. Fish migration up the pipe is relatively difficult due to the poor entrance at the Cedar
River and the difficulty for fish to migrate up a long, dark pipe.
Sediment Basin
Purpose: Construct a new sediment basin that will be more effective than the existing basin in
trapping sediment and preventing it from reaching the golf course and Cedar River. Remove
the existing sediment basin and old dam and replace them with a new fish-passable structure.
Design: The new basin has a design surface area of 13,000 sf. (100-year flow), a storage
volume of 49,000 cf., and a design depth of 5.2 feet. The new basin is approximately 3 times
larger than the old sediment basin. An average of 13,000 to 16,000 cf. of sediment may
accumulate each year. Sediment removal may occur every 2 to 3 years.
The mean monthly flows for Maplewood Creek range from 1 cfs in the summer to 6 cfs in the
winter. The peak flow for the 100-year storm event is 197 cfs (current conditions, HSPF).
The fish ladder has a low flow capacity of 17 cfs and a maximum flow capacity of 64 cfs. The
overflow spillway has a design capacity of 360 cfs.
Schedule: Planning started in 1990 after the January 1990 storm and floods. A FEMA Grant
for preliminary design was approved in 1993. Construction started in September 1996 and was
completed in November 1997.
Cost: Construction $620,000 Engr. Design $110,000 Permit/Admin. $ 60,000
Total Cost: $790,000 FEMA Grant $396,000 City Funds $394,000
Page 1
Fish Channel
Purpose: Provide a fish-passable channel to allow salmon to migrate from the Cedar River to
Maplewood Creek. Provide better spawning and rearing habitat on the golf course. The Fish
Channel will connect to the WSDOT fish ladder under SR-169.
Schedule: Conceptual planning was done in conjunction with the Sediment Basin.
Engineering Design began in 1995. Construction started August 1998 and was completed in
January 1999.
Design: The new channel on the golf course is about 1,400 feet long, 26 feet wide (top of
bank), and 4 feet deep. The channel slope ranges from 0.2 percent to 2.5 percent. During low
flow periods, the water depth in the channel is 6 to 8 inches. The plantings along the channel
include Vine Maple, Tall Oregon Grape, Salal, Red-twig Dogwood, and Pyramid Spirea.
The splitter structure on the golf course was designed to divert low flow (the first 20 cfs) to the
new channel. The new channel has a design capacity of about 45 cfs, which matches the
capacity of the WSDOT culvert and fish ladder.
Cost: Construction $ 960,000 Engr. Design $ 160,000 Permit/Admin. $ 90,000
Total Cost $1,210,000 City Funds $1,210,000
H:DIV/UTI UDOCS/1999/99-380/DC:If
Page 2
,
� I ,
New Sediment Basin
,
END CONSTRUCTION AT ,� �"_ I; Old Sediment Basin
FISH LADDER
SEE SHEETS 15 &16
SCALE 0 40 80 160 FEET North
I I
1 80' t ./. /�.�' \ / o I
EXCEPT AS NOTED
Old Club House ,,L � /, — �EX:$nn;r, SPILLWAY
t EXISTING EMBAUKM
• ``!9T!� C�R�EN �1 / ~�'\ I � II
uILDIN
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g x l �� `,• � i
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��/ UPPER FISH CHANNEL
J \� \ I SEE SHEETS 6
I \eQ ING�t�RE�
PK,\4AI
BORE I �•_-i, I % D
HOLE 10
New Fish Channel F
BORE
HOLE 9
A F,!RWA` --
/ LOWER.FISH CHANNEL F AP!E NCC•C
SEE SHEETS 3. 4 h 5 SRD FAA,V 't? �—BCCs ZR
�7 BORE. y"^. �,!' 57ArnTj
BQRE
5?H GREENOtE
;vr+ `,z.,,�`\ *\` AND TRAP BORE.''
\ ! HALE 7
^-c. ^• \ BbRE / BORE,,'
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EXISTINv\ HOLE 3\ 1 •• • �� \r� l �' •
9 --- \ — f Ay.
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/s CA PATH ��: 4TH tiIRKAV i rr
BORE FI
HOLE 4 //
BORE
►La.E 5 • ` „ I �/ CITY OF RENTON
„'\ 1. I / \�\C.. FIR .II I I, .! ', %
DEPARTMENT OF PUBLIC WORKS
L— E�c�S LNG F15ti .ADDER ` \�
CCNCRE;E 71AI� �- / MAPLEWOOD CREEK FISH CHANNEL PROJECT
Creek Channel
WELL PROJECT SITE PLAN
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VAULT I,E riwE:9EIlOI
\ CONI:��WALI.J ^' OCSIOQ . CO DATE' 7/1/9! n
CEDAR RIVER FX 1? b CmeCKm. DCP $"`E "s•'°""
06 ;/' APPROVED; SHEET: 2 OF:22
CONTAINER STOCK
PLANTING GROUP 1 AS REO'D TO 3.0'_ 2�
' EXISTING GROUND
i CUTTINGS
PLANTING GROUP 2
x
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t
2 TYP
�1
Typical Section - Lower Channel
AS REO'D
�_p• 20' 2.0' 4.0' FOR ROCK WALL
PLACEMENT TYP.
EXISTING GROUND I MINIMIZE DISTURBED
/T` AREA, RESTORE PER PLAN
/ �� I UNDISTURBED GROUND
' II-SEE PLAN FOR TOP
OF BANK TREATMENT.
HYDROSEED. SOO OR
1_________ GRAVEL TYP
ROCK WALL
3-MAN ROCKS. TYP. eA 1 I.E. I v o
VARY DIAMETER OF _0 6 VARIES. I oo 6 COMPACTED GRANULAR
ROCK TO MATCH ° SEE o
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EXISTING GROUND- O 2 EXCAVAT-AS STEEPLY
o 21 t�
AS POSSIBLE, IYP.
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Fairway Crossing
SLOPE UP OR DOWN AS
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CULVERT TYP: SEE NOTE 2
EXISTING GROUND
VARIES: SEE PLAN/PROFlLE
SHEETS 4 OR 5�\ BOX CULVERT/
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Box Culvert Crossing
B - B
TYPICAL 6' X 4' BOX CULVERT
CHANNEL, SYMMETRICAL
8'-0"
LOW FLOW NOTCH DETAIL
E r-o- 5'-0' ATTACH cEOTEXTILE (NICOLON 570
18'0 MIN. UPPER LOG 2'-0' OR EQUAL) TO UPPER LOG PATH
SEE SHEET 5 FOR CREST ELEV. TOE OF SLOPE I 2 X 4 PRESSURE TREATED WOOD
ON O/S
SIDE OF' - CLEAT, FULL LOG LENGTH TYP
---- _ LOG i
;YP
FL
DRILL 1 3/8-4 HOLE O 30',
2 TYP. DRIVE (2) /10 REBAR THROUGH
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LOGS AND EMBED INTO CREEK
BED AT LEAST 4' TYP
LEVELING SHIMS. SEE SECTION E-E -
�.
18'0 MIN. SEAL LOG
`--- J
f10 REBAR (2 REO'D) C /I----
2' THICK RIPRAP ON c
DOWNSTREAM SIDE OF LOGS, Log Drop, Profile and Section
SEE PLAN FOR EXTENTS B-B
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