05-11-1998 Council Packet - Laserfiche WebLink

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r runoff before discharge for a 1 year event. All ponds must provide a ten HO) foot safety bench at a slope no steeper than lOH: IV and two (2i feet of freeboard above the 100 vear pond level. (b) The outfall structures shall incorporate designs to minimize erosion and scouring. (c) New buildings and structures shall have door and window openings a minimum of tv^o feet above the 100 vear hiuh water elevation. (4) If Q developm ent or redevelopm ent site-is-teog than 40 oor es'ond -the Board of Managers determines tha t the w ot detention and/of -stewnwat er storag e requirements wou ld-be-better addr essed on o regiona i-basisr the'Opplieont may insteod oontribut o'to o dedicat ed Distriot wat er quali ty/stormwQter■stora ge-fund in li i^of -pro vtiding the neo essory foo itities on site. The fund will be used HI plann ing, oonstruot ing, and ma intain ing regiona l detention bos ins/wetlondsi Contr ibution to the obov e fund will only be ol low ed: ^--------if on a greement for a tegiona l facility is-in ploo e with the-a ffeot ed rnunwipa lities', or, ^--------if there-is-an existing or plann ed District regional stormwat er foc ility within the some subwot ershed; or, 2--------if the Board of Manog ers determines tha * anoth er facility in a different-subwat ershed is ot'o higher-wQter qual ity priority and would better o erv'e the public health and weifar e-and the purpos e of the wat ershed law. The Diotriot will utiliee funds-ooli eot ed within the sam e subwat ershed, provided that the Board of Manog ers moy-a llooot e contributions to the dedioa >.id fund for a different subwat ershed-if-the-Bo o rd determines that a regiona l stormwat er facility wl - i the sam e subwat ershed is not feos ibler-of that-a faoiiity in o different subwot ershed is of a higher wat er qua lity-priority-and -would better-serve the public hea lth and weifar e and the purpos e of the wat ershed law. The oontribut ion w ill be equo i to the oost of the-land, bas in oonstruct ion -and bos in ma intenanc e l-fcv^d value will be bas ed on the tan ass essed value and ba sin cost -j of S2Q.000 per acr e foot of required porid volume. At the discretion of the District, the stormwat er wet detention -and storag e requirements for o given site may be split between on -site foo ilities and contributions to the District water quality/stormwater storag e fund'. SitecpwiFio Best Manag '<»ment Practic es (BMP*s)-will be required on a ll-sites-.' regardle ss of contr i^tion to ttte wot er Qivatity/stormwatcr storag e fund. Contribut ions to the District wat er qunlity/stormwat er storag e fund for add ition s to existing sites and for roods. streetSf and highways ar e bos ed on the ar ea of the new addit ion or. for roads, streets, and highwovs. the increas ed hard surfac e ar eo and not the teta l-site ar ea. Contribut ions to the abov e fund for new- on the tota i site ar eo. If a site drains to -andevelopment or reconstruct ion redeveloom ent ar e bos ed existing or plann ed District regio nat-st ormwat er faoilitv ‘, the app lica nt is required to contr ibute te the wat er qual ity/stormwat er storag e fund as stated obov e. (g) Runoff -dro ining onto the-site nwst be oocommodot ed in the anolys es and design of new stormwat er monog ement facilit ies.' (i> Wet detentiow-ba sins construct ed pursuant to Stormwater Manog ement Plan s under this-fwle shall-bein conformanc e-with approv ed Municipal Storm woter Manage ment Plans. (!<>■ The outfa ll structures within wetlond s ond public wat ers and w etlands shall incorporat e a stilling bas in, surge bosin. energy dissipot er, plac ement of ungrout ed natural rock rip rap or oth er April 29. 1998 J