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SENECA II-W 7'R-67 PAR COMMENTS <br />l . because these tr?ctures will control runoff from disturbed areas, all of these- propascd <br />structures must e located along dra?naes hdraulicall up-gradient fain an approved <br />sedimentation po?ad that ?? ? ??' permit. ?lea?e add ? st?te?ment to the re??ised t?e?t <br />ors ? e ?, Tali ?a? to clarify that ?? s?ueh xnnoff eontral structures will be located <br />up-gradient from existing sediment fonds with approved hermits, <br />. we ?.?? reserved co?nm?er?ts regarding the prc?poscd runoff control structures fr?otn the <br />111v1S1or? of water e?oUrCe. ?ilce the str?l?cture 1 ?Ub? ect t? adlnlnlstration 1t must ?o stQrc <br />water out-o??prorit, X11 storage must ?? drained from the runoff control structures within <br />gent -four hours ?? directed ? the division engineer andlor water co?n?nissioner. The <br />? ? <br />l?wR'? rne?norandun? from rang ?'I. l??s, P.E., 'dater Iest?urces l?ngineer, x attached, <br />?leas? provide ?, respc?n?e ?? appropriate design +?hanes to amply with the ?'?. <br />directive. <br />The design, construction and rr?axntenance ofthe ru??offcontrol structures must ensure <br />that water bows throe h the cantrol structure fallowing storm event. pertain desi.? <br />and constructlon Inodlficat?ons are warranted 1?'1 order to ensure that the structures wlll <br />not ??npound water,. and wild comply with tl?e ? request referenced in ltetn 2 move, <br />The current design would impound water between the two pipes once the lower pipe inlet <br />xs buried with scdianent, and between the upper pxpc and open spillway channel once the <br />upper plp?e inlet is buried, properly slotted ?-?ser pipe extended from tll?e lower <br />dichar e i e ? to the o erg illwaelevation may be sufficient to properly dewater the <br />pp p p ? <br />structure within ? fours, throuhaut the life of the structure, Please revue the designs <br />far the runoff antral strnct?ures and in?carporate slotted riser pipe or alternative <br />clesin that wi11 drain ail storage within ?,4 haurs thranhaut the life of the <br />structure. <br />Further, please amend the permit test in ?ab? o page f8, to include statement that <br />these runoff control structures are nat intended to impound water, and will be <br />constructed and maintained to drain all starage within ?4 ha?ur. <br />?.ndy gown <br />Marcia Tal?vitie