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<br />" . <br /> <br />Retention_S\lStems <br />- W"erponC1s <br /> <br /> <br />slope vegetation <br />per detention <br />facility requirements <br /> <br />wet 001 flow len th = 3 min. x width <br /> <br />first cell <br />depth 4' min. <br />to 8' max. <br /> <br />wetpool depth 8' max. recirculation <br />recommended for depth> 6' <br /> <br />1ft <br /> <br />i eme:~ overflow WE <br />v v wWS <br />... f WO desion WS <br /> <br />2'min. <br /> <br />inlet erosion control! <br />slope protection per <br />detention facility <br />requirements <br /> <br />Note: Berm slope may be <br />2: 1 when top SUbmerged <br />l' below WQ design WS <br /> <br />emergent vegetation <br />required for wetpool <br />depths 3' or less <br /> <br />sediment storage <br />depth ::I l' min. <br /> <br />SECTION A-A <br />NTS <br />Caption <br /> <br /> <br />fence required for side slopes <br />steeperthan 3(V): 1(H) <br /> <br />access road <br /> <br />manhole or <br />type 2 <br />catch basin <br /> <br />valve <br />(may be located inside MH <br />or outside with approved <br />operational access) <br /> <br />exterior berms designed per <br />dam safety requirements <br />if applicable <br /> <br />SECTION B-B <br />NTS <br /> <br />NOTE: See detenlion facility <br />requirements for location and <br />setback requirements. <br /> <br />Figure 3b: Wet Pond Design with Separate Sediment Forebay (Profile View) <br />Source: Stormwater Management in Washinglon Stale, 2000 <br /> <br />Metropolhan Council I Barr Engineering Co. <br /> <br />3-257 <br />