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ROADWAY
ROADWAY
SHOULDER
SHOULDER
INSLOPE
INSLOPE
FL
OW
FL
OW
PLAN VIEW
ROADWAY
SHOULDER
INSLOPE
FL
OW
FL
OW
POST
2 GROUND
LINE
**
10’-0"
MIN.
INSLOPE
TYPICAL SECTION
PLAN VIEW
FABRIC
EXCESS
FABRIC
GEOTEXTILE
2FLOW DIRECTION
1
3
MIN. 18" LONG
ANCHOR STAKE
POST AND ANCHOR
TIEBACK BETWEEN FENCE
FENCE
SILT
FLOW DIRECTION
(WHEN REQUIRED BY THE ENGINEER)
1
APPLICABLE SPECIAL PROVISIONS.
THE PERTINENT REQUIREMENTS OF THE STANDARD SPECIFICATIONS AND
DETAILS OF CONSTRUCTION NOT SHOWN ON THIS DRAWING SHALL CONFORM TO
2
ROADWAY
ROADWAY
SHOULDER
SHOULDER
INSLOPE
INSLOPE
FL
OW
FL
OW
1
DITCH DIKE
SITUATION 1 SITUATION 2
* *GEOTEXTILE FABRIC
FABRIC ONLY
GEOTEXTILE
EXCAVATED SOIL
TRENCH WITH
BACKFILL & COMPACT
FLOW DI
RECTION
MAY BE REQUIRED IN UNSTABLE SOILS
AND NAILS
STAPLES OR WOODEN LATH
THE POSTS WITH WIRE
ATTACH THE FABRIC TO
2’-
0"\
3’-0" MAX.
3’-0" MAX.
3’-0" MAX.
3’-0" MAX.
2
FLOW
3" MAX.
FOLD
FABRIC
GEOTEXTILE
3
IN GROUND
2’-0" MIN. DEPTH
LENGTH 4’-0" MIN.
WOOD POSTS
CHIEF ROADWAY DEVELOPMENT ENGINEER
MINIMUM SIZE OF 1�" X 1�" OF OAK OR HICKORY.
NOTE: 8’-0" POST SPACING ALLOWED IF A
WOVEN GEOTEXTILE FABRIC IS USED.
*
*
*
*
*
NOTE: ADDITIONAL POST DEPTH OR TIE BACKS
WOOD POSTS SHALL BE A
HORIZONTAL BRACE REQUIRED WITH 2" X 4" WOODEN FRAME OR EQUIVALENT
AT TOP OF POSTS.
4 SILT FENCE TO EXTEND ACROSS THE TOP OF THE PIPE.
4
SILT FENCE AT MEDIAN SURFACE DRAINS
GENERAL NOTES
TYPICAL APPLICATION OF SILT FENCE
SILT FENCE
TRENCH DETAIL
SILT FENCE TIE BACK
TWIST METHOD
HOOK METHOD
FLOW DIRECTION
FLOW DIRECTION
LENGTH.
ROTATE, AT LEAST 180 DEGREES, B) HOOK THE END OF EACH SILT FENCE
FOLLOWING TWO METHODS; A) OVERLAP THE END POSTS AND TWIST, OR
LENGTHS TO AVOID JOINTS. IF A JOINT IS NECESSARY USE ONE OF THE
5 CONSTRUCT SILT FENCE FROM A CONTINUOUS ROLL IF POSSIBLE BY CUTTING
5
2’-0" MIN.
1’-0" MIN.
WOOD POST
WOOD POST
FABRIC
GEOTEXTILE
FABRIC
GEOTEXTILE
JOINING TWO LENGTHS OF SILT FENCE
FABRIC
GEOTEXTILE
FABRIC
GEOTEXTILE
WOOD POST
WOOD POST
TO FIT TRENCH AND BACKFILL & COMPACT TRENCH WITH EXCAVATED SOIL.
& 6" DEEP TO BURY AND ANCHOR THE GEOTEXTILE FABRIC. FOLD MATERIAL
FOR MANUAL INSTALLATIONS THE TRENCH SHALL BE A MINIMUM OF 4" WIDE
15’ MAX.
OR TENSION TAPE
SUPPORT CORD
DEPARTMENT OF TRANSPORTATION
STATE OF WISCONSIN
APPROVED
DATE
FHWA
66
S.D.D. 8
E 9-6
S.D.D. 8
E
9-6
SILT FENCE
4-29-05 /S/ Beth Cannestra
SDD 8e9 Silt Fence
Version 6 Standard Detail Drawing 8E9 July 5, 2005
Silt Fence
References:
FDM 10-10-23
Bid items associated with this drawing:
ITEM NUMBER DESCRIPTION UNIT
628.1504 Silt Fence ............................................................................................................ LF 628.1520 Silt Fence Maintenance ....................................................................................... LF
Standardized Special Provisions associated with this drawing:
STSP NUMBER TITLE
NONE
Other SSDs associated with this drawing:
NONE
Design Notes:
Silt Fence is not recommended for channel applications.
Increase the calculated need for silt fence by 25% and list this quantity as "undistributed" on the miscellaneous quantities sheet.
Silt Fence is neither biodegradable, recyclable, nor reusable and, therefore is recommended only when other erosion control best management practices are not practical.
Contact Person:
Robert Armstrong (608) 267-3147
