2C, Stormwater OutletPond Inventory

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lt EN HILLS MEMORANDUM DATE: December 19,2011 TO: Honorable Mayor and City Councilmembers Patrick HIaers, City Administrator FROM: Terry Maurer, Public Works Director ! SUBJECT: Storm Water Outlet/Pond Inventory Background There is a $100,000 item in the 2011 CIP for the update of the City's Surface Water Management Plan which is required by State law and Rice Creek Watershed District (RCWD) policy. On November 14, 2011 the City Council authorized the expenditure of up to $25,000 to complete this work utilizing the Joint Powers Agreement and some minor consultant time. This was staff s recommendation for the most cost-effective way to complete this required update. At the same November 14, 2011, meeting, staff indicated we would be exploring spending some additional monies out of the $100,000 CIP item to get an inventory of the ponds in the City storm water system along with an inventory, GPS locations, and inspection of storm sewer inlets/outlets in these ponds. This inlet/outlet work was a requirement of the City's first MS4 permit and was suppose to be complete by now but has yet to be started. The pond inventory will be a requirement of the new MS4 permit the City will be getting from the MPCA in 2012. Attached is a proposal from Elfering and Associates for all the field work to complete the inventories and inspections along with adding the gathered field information to our GIS map for permanent retention. The work will be completed on an hourly basis ($50/hr for a Technician and $65/hr for a Staff Engineer) not to exceed $24,000. The hourly basis is necessary since at this time we do not even know how many ponds and inlets/outlets are in our system. Given the lack of snow cover the field work would begin immediately and be completed in spring if snow cover stops progress. City Council Meeting P:\Admin\Council\Agendas&Packet Information\2011\12-19-11 Worksession\Packet Information\12-19- 11 OutletInventoryMemo.do c Page 1 of 2