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6ty Council Regular Meeting Minutes May 22, 2012 Page 2 Motion by Councilmember Stille, seconded by Councilmember Jenson, to approve the Consent Agenda items. Motion carried unanimously. IV. PUBLIC HEARING. 8 None. 9 10 V. REPORTS FROM COMMISSION AND STAFF. 12 None. 13 14 VI. GENERAL BUSINESS OF COUNCIL. 15 16 A. Resolution 12-050; Accepting July 2012 Flood Investigation and Stormwater Modeling 17 Report. Todd Hubmer, WSB & Associates, presenting. 18 19 Mr. Hubmer presented the Flood Report that had been prepared in response to the July 16, 2011, 20 rainfall event resulting in several areas within the City and surrounding communities 21 experiencing severe flooding. Mr. I Iubmer reviewed the July 16, 2011 rain event with details of 22 the rainfalls. He showed the radar imagery from that July 16, 2011 event. There are numerous 23 collection rainfall gauges. He has prepared a modeling report based on data gathered. Flood 24 damage occurred in St. Anthony. Mr. Hubmer reviewed the rainfall in surrounding areas and the 25 ditches and their drainage patterns. Flooding occurred in four areas of the City — Mirror Lake 26 Townhomes, Silver Lane and Shamrock Drive, 39°i Avenue and Shamrock Drive, and St. 27 Anthony Industrial Park. Mr. Hubmer reviewed the City's response after the rain event. The 28 storage capacity was exceeded in Mirror Lake. Various storm drains were televised. Some 29 repairs are needed to some of the pipes. Mr. Hubmer provided a detailed presentation on the 30 flood investigation and stormwater modeling report. Mr. Hubmer provided six options for 31 increasing the storm sewer storage capacity for the Mirror Lake "Townhomes area. 32 33 Mr. Hubmer provided one option for Silver Lane and Shamrock Drive. Ile reviewed one option 34 for the 39°i Ave and Shamrock Drive area. Mr. Hubmer stated the Industrial Park had flooding 35 in 1997 as well; however it was a different building. Mr. Hubmer provided two options for the 36 Industrial Park area. Mr. Hubmer stated there was an error on the Industrial Park option with 37 cost being $120,000 (rather than $220,000) as printed. 38 39 Councilmember Gray stated he is concerned something should be done quickly. He asked what 40 the timeline was for Option five. Mr. Hubmer stated they are currently obtaining a cost estimate 41 and meetings will be held with Rice Creek Watershed. The Mirror Lake Townhome Association 42 sent a letter to Rice Creek Watershed. Mr. Hubmer will return to Council after the estimate is 43 received. 44 45 Councilmember Stille asked if the cost indicated in Option 4 was the total cost or just the City's 46 cost. Mr. Hubmer stated Rice Creek has its own taxing authority and some funds could be put