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TAIJLE \'-3 DETENTIO;i rmm~_ VOLIJ~LES Storm Frequency (year) Storage "\/olutilE: Required (acre-feet) 2 5 10 100 11.lf 28.5 51f.8 8S.7 If the individual areas which drain to Alignment "A" WEre controlll3d by detention ponds, the adverse affect of a storm is lessened considerably in the main drainage-way. Tentative locations for these ponds are shown in Figure V-I. It m:..:;.st be understood that if a scarill Here to occur repeatedly or over a long duration, the effects of these ponds cOllld be minimal since they would be continuously full. A possible solution would be to design emergency draining gates, thereby .the ponds could be drained in E~tnergency or regular maintenance situations. Any flooding result.i.ng \~~ould. be a controlla'61e condition. It was voiced by the residents along Alignment 11AlI that: the standing vlater has created saturated soil conditions and se<epage into the houses. :By 0.etent10n above Align-neut "A", these residences immediately benefit and also residences along Lena Gulch below this tributary would also benefit to a lesser degree since t:1e runoff \-"ould be rele.ased at a s.IOlver and controlled rate. These ponds are locat~d above Alignment lIAII, and the runoff could .he regu- lated through the exi3ting drainage-",ay. Each pond location ,"auld have a controlled outfall pi.)e system to Alignment "An. Alternate Pond 1: could be expanded CO:lstruct ponds on South -fable Nountain. to I=ach tributary from the mountain~ This concept Alternate Pond 2: CO:lstruct a pond on open area north of 13th Place and west of Orchard Stree~. Alternate Pond 3: Be:",e<en Orchard and Nile Street north of J_3th Place. Alternate Pond 4: Construct a pond on open area south of 12th Place and ",est of Quaker Street. Alternate Pond 5: Beu,een Orchard and Nile, north of 12th Avenue. Alternate Pond 6: H<e;;t of Quaker St. and south of Old Golden Road. 25