HomeMy WebLinkAboutAttachment 6 - May Creek EnhancementATTACHMENT 6 - MAY CREEK
ENHANCEMENT PLAN
CONCEPT LEGEND
EXCAVATION FOR OVERBANK
;ABOVE OHWM
-.,..,-EX ANGULAR ROCK BELOW OHWM
-. . EX STREAM SCALEABLE EDGE
,-EX STREAM SCALEABLE EDGE
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\_
m->!-.__EX ANGULAR ROCK BELOW OHWM
EXCAVATION FOR OVERBANK
ABOVE OHWM CJ PROPOSED FILL REMOVAUSTREAM GRADING
(INCLUDES UPLAND STREAM BANK
EXCAVATION, EX ANGULAR RIPRAP REMOVAL)
-------ii# CONCEPT PLAN HYDRAULIC CROSS
SECTION
PLAN LEGEND -·· EXISTING STREAM
:§ii: .>l.1.iL .>l.l.iL I WETLAND
· · · · · · · · · · · WETLAND BUFFER
• • • • • • STREAM BUFFER
--OHW-ORDINARY HIGH
WATER LINE
- CUT --CUT LINE
-FILL --FILL LINE
EXISTING CONTOUR
PROPOSED CONTOUR
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LEGEND NOTES
EXISTING ANGULAR ROCK BELOW OHWM SHALL BE REMOVED AS
DIRECTED IN THE FIELD BASED ON DRY SEASON WATER LEVEL
AND OTHER EXISTING CONDITIONS AS EVALUATED AT THE TIME OF CONSTRUCTION.
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I ' ' ' '7.17'"/7'?.1'7'"/7'? PROPOSED RIGHT OF WAY
7.17'"/7'?.1'7'"/7'? EXISTING RIGHT OF WAY \ SB 1405 \
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OF PAVEMENT '\ ' ' ' ' '
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EX MAY CREEK ,.. / /
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STREAM EDGE, PER WSDOT
FIELD SURVEY,, OF EX STREAM
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X-SECS
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PAVEMENT
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PRESTRESSED CONC GIRDER
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BRIDG1E
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EXISTING WALL
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PROPOSED ROW I
CONCEPT PLAN HYDRAWLIC
\ CROSS SECTION
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( I "' MAY CRK INTERCEPTOR '
-�1--------------------------------------------------------------------------------------------------·-.-_ MAY CREEK CONCEPT PLOTTED BY: LivingT i! -DATE: 10/6/2017 TIME: 5:55:19 PM ., � Washington State � 'f /1 Department of Transportation LINE 1: NO IN WATER WORK GENERAL CONCEPT
LINE 2:
•
0 25 50
SCALE IN FEET
NOTES
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1) EXIST CONTOURS SHOWN ARE PER AERIAL TOPOGRAPHY (2015),
EXCEPT UNDER EXISTING MAY CREEK BRIDGE. CONTOURS UNDER
EXISTING BRIDGE ARE PER WSDOT FIELD SURVEY (2017). EXISTING
MAY CREEK STREAM CROSS SECTIONS WERE SURVEYED FOR
HYDRAULICS ANALYSIS PURPOSES, BUT DUE TO INCONSISTENCIES
IN AREAS BETWEEN GROUND SURVEY INFORMATION AND AERIAL
TOPOGRAPY DATA, THE EXISTING HYDRAULIC SECTIONS DATA IS
NOT SHOWN ON THE PLAN EXISTING CONTOURS, BUT THE
SURFACE LINE FROM THAT SURVEY IS DISPLAYED IN CROSS
SECTIONS AND USED AS THE ASSUMED SCALEABLE EDGE OF
STREAM. THIS DATA MORE ACCURATELY REFLECTS THE ACTUAL
STREAM BOTIOM ELEVATIONS AS COMPARED TO THE AERIAL
TOPOGRAPHIC SURVEY OF EXISTING GROUND SURFACE LINE.
CONCEPTUAL
NOT FOR CONSTRUCTION
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EX BRIDGE /
ABUTMENT/FOUNDATION�
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VARIES (5' MIN)
RELOCATED __/
12" 0.1.
WATER PIPE
(IF IMPACTED)
EX BRIDGE PIER AND FOUNDATION
REMOVED WHERE EXPOSED BY UPLAND
EXCAVATION TO A POINT 2-FT MIN.
DEPTH FROM PROPOSED GROUND LINE
SLOPE VARIES
(2H:1V MAX)
SEE NOTE 4
CONCEPTUAL
NOT FOR CONSTRUCTION
MAY CREEK REPRESENTATIVE SECTION
PROPOSED BRIDGE MINIMUM CLEAR SPAN
100 YR FLOOD PLAIN
REMOVE PORTIONS OF
ANGULAR ROCK RIP-RAP
WITHIN 100 YR
FLOOD PLAIN (TYP)
EX
ANGULAR
ROCK**
EX 36"RCP
KING CO. SS
MAY CK. INTERCEPTOR
(PROTECT IN PLACE)
EX
ANGULAR
ROCK**
.,,
N.T.S
''
S'MIN
---
NOTES:
1) SECTION IS REPRESENTATIVE OF PROPOSED CONCEPT FOR BRIDGE AND STREAM BANK
WORK . DIMENSIONS SHOWN REPRESENT THE MIN. OR MAX. BASED ON PERFORMANCE BASED
DESIGN GUIDELINES AND OTHER PROJECT RELATED COMMITMENTS, SUCH AS TO NOT
PRECLUDE AVAILABLE AREA WITHIN THE FUTURE BRIDGE SPAN LENGTH FOR FUTURE CITY
OF RENTON MAY CREEK REGIONAL TRAIL CONSTRUCTION.
2) CONCEPT ASSUMES REMOVAL OF EXISTING ANGULAR ROCK AND PROPOSED STREAM BANK
GRADING WILL RESULT IN NO NET RISE GREATER THAN 0.01-FT IN DESIGN WATER
SURFACE ELEVATION BETWEEN EXISTING AND PROPOSED CONDITIONS.
3) EXISTING BRIDGE SUB SURFACE FOOTING CONDITIONS VARY. SPREAD FOOTINGS, PILE
SUPPORTED FOOTINGS, AND DEEP SHAFT SUPPORTED FOOTINGS ARE ALL PRESENT AT THIS
BRIDGE LOCATION. FOOTING ELEVATIONS VARY. THE SECTION SHOWN REPRESENTS THE
SPREAD FOOTING LOCATION. THE PILE SUPPORTED FOOTING ON THE RIGHT (NORTH SIDE OF
CHANNEL) IS ALSO PROJECTED INTO THE SECTION TO SHOW WHERE SUB SURFACE
ELEMENTS ARE CLOSEST TO THE EXISTING GROUND SURFACE.
4) EXCAVATED SLOPES ABOVE OHWM SHOWN ON MAY CREEK REPRESENTATIVE SECTION
ABOVE ARE CONCEPTUAL. FINAL PROPOSED GRADE SLOPES WILL BE DETERMINED BY
DESIGN BUILD CONTRACTOR.
VARIES, MIN 16' ZONE FOR FUTURE TRAIL
FUTURE TRAIL
-------------------_;.-...---.... ....
PROPOSED ROADWAY
�EX GROUND
_ .... _____ ....
....
�EX BRIDGE
SLOPE VARIES
(2H:1V MAX)
SEE NOTE 4 ,-.... I ABUTMENTIFDUNDA noN
---------+
EX BRIDGE PIER AND FOUNDATION
REMOVED WHERE EXPOSED BY UPLAND
EXCAVATION TO A POINT 2-FT MIN.
DEPTH FROM PROPOSED GROUND LINE
EX PILE SUPPORTED FOOTING
(DOWNSTREAM FROM REPRESENTATIVE
SECTION)
OHWM SHOWN FOR INFORMATIONAL PURPOSES ONLY. OHW ELEVATION SHALL BE VERIFIED
BY A QUALIFIED BIOLOGIST PRIOR TO THE BEGINNING OF CONSTRUCTION.
EXISTING ANGULAR ROCK BELOW OHWM SHALL BE REMOVED AS DIRECTED IN THE FIELD
BASED ON DRY SEASON WATER LEVEL AND OTHER EXISTING CONDITIONS AS EVALUATED
AT THE TIME OF CONSTRUCTION.
�. MAY CREEK STREAM TYPICAL SECTION CONCEPT PLOTTED BY: LivingT
DATE: 10/6/2017 TIME: 6:08:34 PM :,: Washington State 'lfff/1 Department of Transportation LINE 1: REPRESENTATIVE TYPICAL STREAM SECTION -NO IN WATER WORK CONCEPT
LINE 2: .__ ________________________________________ ......_ _________________ .__ _____________________________________________________ __,
STREAM BUFFER ENHANCEMENT PLANTING
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v v v v v v v SALIX SITC HENSIS2 SITKA WI LLOW
• To be installed in drier conditions. 2 To be installed in wetter conditions.
• Planting Design shall use species from this list and shall be selected based on specific site conditions.
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LEGEND
I .iii, .iii, .iii, .iii, .iii, WETL AND . .ui. >I.LI., .ui. .w. .w.
-----.. -------· WETL AND BO UND A RY • • • • • • • • • • • • • • • • • WETL AND BU FFER
STR EAM CENTER LINE
-OHW------
STR EAM BU FFER
ORDIN ARY HIGH WA TER MARK BO UND ARY
DITCH BO TTO M
PIP ED STREAM
-OR -FLOW DI RECTIO N
PROPERTY LINES
[v:v:v:v:v:v:v:v:v) BU FFER MITIGA TIO N
IMP ERVIO US SU RFA CEREMOVAL ED GE OF PAVEM ENT NEW
RETAINING WALL
STR E AMBED GRAVEL / AGGR EGATES; LWD
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QUANTITY THIS SHEET
0.117 AC
STREAM BUFFER IMPACT -TEMP
FILE NAME c:\users\taylorsu\pw _ wsdotld0139111 \XL4653 _EB _M itigation_ 02_MayCreek.dgn TIME 11:28:51 AM DATE 10/10/2017 PLOTTED BY taylorsu DESIGNED BY J. LONG ENTERED BY S. TAYLOR CHECKED BY R. THOMAS PROJ.ENGR. REGIONAL ADM. L. ENG REVISION DATE
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BY
REGION STATE
NO. 10 WAS
JOB NUMBER
CONTRACT NO.
IMPACT -TEMP
FED.AID PROJ.NO.
LOCATION NO.
XL4653
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RENTON TO BELLEVUE
CORRIDOR WIDENING & EXPRESS TOLL SHEET
STREAM & CRITICAL AREA BUFFER
MITIGATION -MAY CREEK
2
OF 7
SHEETS