Agenda - Council - 05/12/2009 - Laserfiche WebLink

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Case #5: Stormwater Model Overview Background: Civil Engineer Leonard Linton presented a PowerPoint presentation of the city-wide stormwater models created as .part of the Surface Water Management Plan update.. His review outlined the seven major drainage basins, Trott Brook, Golf (Rum .River Hi11s Area), County Ditch 66, County Ditch 43, East Mississippi, Middle Mississippi and West Mississippi. He discussed the general theory of the stormwater model. The model can look at a single event or use data collected from a rainfall gauge. He presented data for the lined pond in Highlands at River Park using rainfall data from 1997 - 2006. The pond was first modeled like a bowl with no water leaving through infiltration. or evaporation. The water level stayed at the overflow elevation. The-pond was also modeled with several rates of infiltration. The pond goes dry in between each rain event, with water leaving through the outlet pipe for the larger rain events. Action: No action necessary. Case #6: Discuss Scope of Dysprosium - Flintwood Safety Improvements Background: At the February 17, 2009 Public Works Committee meeting staff was directed to prepare a feasibility study for improvements to Dysprosium Street and the Flintwood Hills neighborhood that would increase public safety in this area. During the discussion a number of safety issues and remedies, were offered by the neighborhood residents. The purpose of this case is to receive direction regarding the scope of elements which should be considered in the preparation of that study. As a result of the discussion, the feasibility study will include a six foot concrete sidewalk along the west side of Dysprosium Street and a five foot concrete sidewalk between Dysprosium Street and TH 47 along 143`d Avenue/Argon Street and 142nd Avenue. There will be no speed tables or street lights. Action: No action necessary Case #7: Update on Proposed Changes to the Speed Limit Laws in Minnesota Background: This was. primarily presented as an informational case. The Legislature directed a Committee be performed to study speed limits in the State. The point staff wanted to make was the one that is most affecting us is what the City refers to as rural residential district, which says that if you have structures that are spaced at least three hundred feet apart a 30mph speed limit can be posted .while specifically states in Townships but doesn't apply to Cities. All of our suburban subdivisions have spacings that don't meet the urban standard being less than 100 feet apart and -101-