HomeMy WebLinkAbout217.40A B
1.CONDITIONS OF USE
1.1.WHERE THERE IS CONCENTRATED RUNOFF FROM DISTURBED AREAS TO AND FROM SEDIMENT PONDS OR TRAPS.
1.2.TO CONVEY RUNOFF INTERCEPTED FROM UNDISTURBED AREAS AROUND THE SITE TO A NON-EROSIVE DISCHARGE POINT.
2.MAINTENANCE STANDARDS
2.1.ANY SEDIMENT DEPOSITION OF MORE THAN 6 INCHES SHALL BE REMOVED SO THAT THE CHANNEL IS RESTORED TO ITS ORIGINAL DESIGN CAPACITY.
2.2.THE CHECK DAMS SHALL BE EXAMINED FOR SIGNS OF SCOURING AND EROSION OF THE BED AND BANKS. IF SCOURING AND EROSION HAS OCCURRED,
AFFECTED AREAS SHALL BE PROTECTED BY RIPRAP OR AN EROSION CONTROL BLANKET OR NET.
NOTES:
ROCK MUST COMPLETELY COVER THE BOTTOM AND SIDES OF THE DITCH
6" MIN.
24" MIN.
L = THE DISTANCE SUCH THAT POINTS
A AND B ARE OF EQUAL ELEVATION
L
2"-4" ROCK
2
1 2
1
SECTION A
SECTION B
CHECK DAM (TYP.)
PLANAB
18" MIN.
FLOW
DITCH
BOTTOM OF DITCH
18" MIN.
DITCH CHECK DAMS
STD. PLAN - 217.40
PUBLIC WORKS
DEPARTMENT
APPROVED:
DATEGregg Zimmerman
Public Works Administrator
UNLESS OTHERWISE NOTED, DRAWING IS NOT TO SCALE (NTS)
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9/28/2018 | 9:45 AM PDT