Agenda - Public Works Committee - 06/21/2005

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CASE # CONSIDER STORM SEWER UTILITY IMPROVEMENT PROJECTS By: Steven J. Jankowski, City Engineer Background: lJat¢ winter and early spring are periods when drainage needs often become readily apparent, particularly in Ramsey were sand soils readily drain in nonfreezing weather. A review of this winter's conditions and complaints has identified two candidate storm water projccts for consideration this construction season. In addition, a third storm water project necds to be considered to make economic use of a property the City has acquired for dcvclopmcnt purposes. Prq/ect Nol. The first project would be a drainage improvement at the intersection of Alpine Drive and Waco Street. At this location Waco Street which has a poorly dcvclopcd rural ditch section for drainage meets Alpine Drive which has concrete curb and gutter. The attached photos which were taken this winter illustrates the problem, the entire width of Waco Street south of the intersection is ice covered for weeks. There is currcntly a catch basin which is located in the north curb line of Alpine Drive just east of this intersection. This condition could be eliminated by the installation of catch basins on thc southeast and southwest comers of this intersection which could be made to drain into the existing catch basin in the north curb line. The estimated cost of this work is approximately $14,000 which would include the complete replacement of 100 feet of badly deteriorated pavement on Waco Street just south of this intersection. Pro./'ec! No2. Thc second candidate project is a result of a complaint by Mrs. Barb Bcabcau who resides at 6376 143rd Lane (the south east comer of Sunfish Lake Blvd and 143'''t Lane). Attached is a sketch which shows that a small drainage area north east of Mrs. Bcabeau's property drains into a rural ditch section adjacent to 143rd Lane. This ditch system is directed through a culvert to the south side of the roadway and the natural grade transmits drainage into Mrs. Beabeau's property. There is no drainage and utility casement over this portion of her lot. In addition, Mrs. Beabeau has a wooden retaining wall in the vicinity and is concerned about the impact of the drainage on this wall. This flow ultimately ponds in her back yard. It is proposed that the storm water be redirected wcstward along 143''d Lane to Sunfish Lake Boulevard and then southward for a distance o l' approximately 230 feet to an existing storm sewer which discharges westward across Sunfish Lake Boulevard into a lot which is presently owned by the City. Water drains from this location overland into the wetland 657 W. The estimated cost of this project is $2O,OO0. ]'rq/ect No3. The third project is related to the need to reroute a storm sewer constructed by Waste Management (now owned by Minnesota Pollution Control Agency) across Lot 1, Block 2 Sunfish Lake Business Park in the early 1990's to transmit treated grotmdwatcr to the Mississippi River. This storm sewer is currently used on occasion by MPCA to augment the groundwater treatment system which relies primarily on ponds.