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FIG3.5A_SEDTRAP_OUTLET6' MIN. 1" MIN. DEPTH OVERFLOW SPILLWAY '__~ (' CiLX~3'~<~'CJ~ I-_I ~''~ MIN. 1' DEPTH NATIVE SOIL OR i I ~I I . , _ € I_ 2'-4' ROCK COMPACTED BACKFILL ~ '- _ _ _ _- MIN. 1' DEPTH 3/4"-1.5 GEOTEXTILE -~ I ~_~ ~ ~-~ ~ ~-~ ~ ~-~ i t-~ ~ ~_~ ~ ~ ~': ~_~ ~ ~_~ WASHED GRAVEL