4.9. SR 10-25-1993 - Laserfiche WebLink

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e m6 Enerro' Pm Drive St Paul, M~ ~~IOS.~2tI'2 612.6H.US9 e fat 612-644.9446 9SOO SOOIanl Mill!, Ste.llt2 lliUDellpOlis, MX ~W.6j~1 612.546-0432 r a.t 612.544-6398 ITEM 4.9. October 21, 1993 File: 230-161-90 The Honorable Mayor and City Council City of Elk River 130650ronoParkvvay Elk River, MN 55330 RE: Comprehensive Storm Drainage Plan Dear Council Members: As you requested, we have prepared the attached brief report providing more information on three critical areas outlined in the Comprehensive Storm Drainage Plan. These three critical locations are the intersection of Main Street and Evans Avenue, the outlet from the regional pond on the east side of TH 169, and the storm sewer outlet needed to address flooding on the Deschenes and Schultz properties north of County Road 12. The following is a brief summary of our [mdings and the issues on each of these areas. 1. Main/Evans Intersection There are two routes of providing a storm sewer outlet from the Main/Evans intersection to the County Ditch #10 adjacent to TH 169. These two would be either directly east down Main Street or south along Evans to Second Street and then east to the county ditch. The Main Street alignment is the shortest by approximately 200'; however, it does require the removal and replacement of street and sidewalk which is in relatively good condition. The second alternative along Evans Avenue and Second Street would require the removal and replacement of street infrastructure which is in a much more deteriorated condition. Therefore, there is some benefit to this alignment relative to the reconstruction of these two streets. The only negative with the Evans/Second Street alignment is the need to acquire easements from two property owners at the east end of Second Street to get from the right-of-way to the county ditch. With either of these options, there will be a necessity to do ditch deepening from the point that the storm sewer outlets into the county ditch southerly to a point where the ditch will daylight. Either of the two options for providing service to the Main/Evans intersection would totally segregate this storm sewer system from the Freeport/Gates storm sewer system, which has previously caused the flooding of the intersection. We would be removing substantially more flow from the Freeport/Gates system than is proposed to be added by the Elk Park Center development. 161-2105.0cr