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•' ., <br />} ~ ~, <br />y <br />_ ,~~ ,` <br />It should also be noted that a 2-1" CSP exists across the Snyder <br />Quarry Access Road Just North of the Guard House area to carry floss <br />from the East side of the access road to the West side and then South~arly- <br />' into the 54";30" system. <br />Several options to the 36" culvert at HR-6 have been investlgatecl to <br />' provide facilities within the Master-Planned Subbasln I-I uhlch would <br />adequately convey- the flows. Following is a summary- of those option<;. <br />' ALTERNATIVES <br /> n' <br />I. OPTION 1 t}'-~ 611,Iw~l(1~ ~NrISL4~ ~1~ CC(, f ~~}L lKS}1N~'1 d`, (i~ <br />~ DMp <br />' Cedar Heights development would construct the culvert crossing , <br /> required in the Master Plan (Proposed Culvert A). The obligation of Cedar • <br /> Heights at the time of preparation of the Master Plan was for lnstallarion <br />' of a Qe facilit.,r• for the flows generated by the old criteria. The Qe floc <br /> reaching the Proposed Culvert A location is 30.6 CFS (old criteria). Using <br /> an HW; D of 2.0, with a concrete headwall entrance condition, a 2; " CSP <br /> pipe would be required at a minimum grade of q°c. <br /> l~Zti I~~ <br /> Castle Concrete Compan}- would Install a Qo facility- (old crlt.eria) for - ~•tiS <br />Nv~~~' <br /> <br />' ~~ <br />U <br />~ 27.5 CFS under the Snyder Quarry Access Road. sing an Hu';D of 2.3 <br />with a concrete headwall entrance condition <br />a 24" CSP at a m <br />ni <br />i ~~ia <br />S~o <br />'` <br /> ,q <br />i f,~ <br />_Y' , <br />t <br />mt <br />m ~ <br />t~ <br /> ~ ~~ <br />' grade of 5?a could be required. This ls_cons scent with what was proposed Q ; 1~ <br /> (~ <br />,,N In the CAP. ~.q,..~...cr (~~Sr = 17 cFS (N~v~q~~°i4q),Ar~,,.'dy~ <br /> I <br />' The remainder of a Qze flow reaching HR-6 (28.9 CFS) could be <br /> diverted Southerly- in a roadway- ditch along the Westerly side of the <br /> Snyder Quarry Access Road to the eTsting 5.1"%30" facility near the Cedar ~ ~ <br />28 ,q cLS <br />' Heights Guard House. The total Qzo flow reaching the 5.1".30" system s <br /> would be the diverted flow of 28.9 CFS and the Qze from the- HR-7 <br /> Subbasin of 57 CFS or 85.9 CFS. The apparent maximum capacity of the ~C.('~ <br />' exlsting SCI"130" system Is 102 CFS. The current access road cross-section i~A-a"1lv:l <br /> and ditch section will not accommodate t.hls flow so some ditch upgrad ~ ~}5 <br /> <br />and construction could be necessary by Castle Concrete Company. q <br />~qy~ 1 <br />/ ~dJ ~ <br />t fI. OPTION 2 CC ~ e3 w~~~a,.' , Cl~ L ~y`~'lr ~ xi~,~~~y w~ ~~.,l+Yf r <br />c'~u.~ <br />' Cedar Heights would upgrade the existing 24" facility' in Cedar <br />Heights Drive to accommodate the naturally occurring Qe reachin>; that <br /> point. The Qe flow (old criteria) reaching the existing facility Is 2..5 <br /> CFS (HR-6) and 6.2 CFS Subbasln I-la and I-]b for a total of 33.. CFS. / <br /> The maximum capacity of the exlsting 24" culvert is 25 CFS. 'fhe <br />' upgraded system required to handle this flow using the available HR [~ of <br /> 2.0 would be an equivalent 30" CSP at a 1"G minimum grade wir,h the <br />t current entrance condition. <br />1 <br /> <br />