3A, July 16, 2011, Storm Update - Laserfiche WebLink

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. '��- EN HILLS MEMURANDUM DATE: August 15, 2411 TO: Honorabie Mayor a�d C�ty Councilmembers Patrick HIaers, Cxty Administrafor FROM: Terry Maurer, Pubiic Warks Director� �� � � � SUSJECT: July 16, 2011 Storm Update Back�round As the City Council is aware, the City experienced a large rainfall ev�nt in a very short period of time early tk�e �ozning of Saturday July 16, 2011. This �vent happened after a rain �vent af over 1.5" on Friday afternoon. Due to the large volume af rain�all, several areas in tawn suffered from flaoding causxng property damage and in one ar�a a lift staiion could not handle the clear water entering the system causing backups into s�veral hornes. The general locations o� the problem areas are as follows: • Arden View CtIDr Townhomes • Lift station #8 service area (Tiller Ln., Ingerson Rd, Hamline Ave} • Indian Oaks pond • A�ble Rd/Nursery Hill Ct rear ya�d area • Glenarden Neig�borhood between Forest and Skiles Sta�f has bee� reviewing each of these areas, some to greater extent than others. At Monday's woxk session staff wili review our findings and look for Ciry Council direction regarding whether or not additional woz� shouid be done. Staff vaill have aerial mapping of each of these areas to help £acxlitate th.e discussion. The area that staff has spent the zrzosi time researching and reviewing is ihe Arden View Ct and Dr townhome associations. Generally staff findings are as follows: AlI starm drainage frorn both the north and �lie south areas flow il�ough the same starzn sewer pipe and pond facilities. It appears the City Council in the rnid 1970's accepted the sto�n sewer along with the sanitary sewer and water main {aitached are the Cou�ncil minutes and backup from June 16, 1975). City Council Meetirig C:lUserslsonj a.klingberglDeskropl8-15-115tormUpdate.doc Page 1 of 2