FIG3.5A_SEDTRAPSURFACE AREA DETERMINED
AT TOP Of WEIR 4' MIN.
1' MIN. OYER~LOW
y ,~. ,: ~,; MIN. ..
~6 1' MIN.
\~ 3.5'-5' ~
FLAT BOTTOM 1
3/4"-t.5" 2°-4" ROCK RIPRAP
WASHED GRAVEL
GEDTEXTiLE /
NOTE: TRAP MAY BE FARMED BY BERM OR BY '
PARTIAL OR COMPLETE EXCAVATION DISCHARGE Ta STABILIZE[
CONVEYANCE, OUTLET OR
LEVEL SPREADER