2002-06-26 CC Packet - Laserfiche WebLink

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~ . Retention_Svstems - "Wer"ponas access ramp to bottom of first wetpool cell (7H: 1 V) (see text) FIRST WETPOOL CELL 25% to 35% of wetpool volume, excludIng access ramp * berm top width S' min. (If earthen) SECOND WETPOOL CELL WQ design WS overflow WS emergency overflow WS ~ *- NOTE: Berm not required for ponds wllh length to width ratio" 4:1 or If volume less than 4000 cJ. inlet pipe & catch basin per detention facility requirements , " " " " '. " " :. " " " " , " " " " " " berm or baffle at design WS or submerged l' below design W.S. Extend berm across entire wetpool width. " , " , , " " " " A " " " " , , " , , " "* " " " " " " " " ~ " ~ \' ; , , , , , , , , I' , , , " " " ., wet 001 width ? ~*- " " /,' ..:::;..,,~ plantings required on cut ,',' ~ slopes for lake protection :: facilities "~ " " " B manhole & outlet pipe pie sized to pass peak ftow per conveyance requirements outlet erosion control & energy dissipation per detention facility requirements B PLAN VIEW NTS Figure 3;1: Wet Pond Design with Separate Sediment Forebay (Plan View) Source: Stormwater Management in Washington State, 2000 3-256 l___ Minnesota Urban Small Sites BMP Manual