10-14-2002 Council Minutes - Laserfiche WebLink

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ORONO CITY COUNCIL MEETING MONDAY, OCTOBER 14, 2002 13. Crystal Bay Road Drainage Project — Continued stormwater treatment to improve the quality of the stormwater effluent discharge into Crystal Bay. A plan was prepared for the low -cost option of installing a pipe across the back yard of the 3447 Crystal Bay Road property and a drainage swale on the west edge of the property located at 3435 Crystal Bay Road. The new swale would connect to an existing swale, which would then drain into an in place culvert under Crystal Bay Road. They requested quotations for the work from several landscaping companies. That option would reduce the erosion and flooding problems on the properties in question and the property owners were in support of the project. That option, however, does not improve water quality, but could be seen as an interim project. Another option was to construct a stormwater pond for water quality improvements, which would require the acquisition of a property. The most logical location for stormwater ponding is on the western side of the area, in the vicinity of 3435, 3445, and 3447 Crystal Bay Road. Lot 3445 is currently vacant and could be purchased to install a pond. Stormwater ponding anywhere close to Lake Minnetonka would be expensive and difficult. If there were interest in purchasing the property, the City would have to have an appraiser complete a valuation study for the property at 3445 Crystal Bay Road. • Murphy asked if the lot was big enough to hold a pond. Gappa stated it was not what they • chose, but it is available. Murphy asked if the pond would be big enough to fix the problems for the entire neighborhood. White asked what the culvert change was that caused the problem in 1996. A neighbor stated that prior to 1996 it was dry. Work on the railroad track caused water to begin flowing down the hill. The City then dug out a trench to direct water to the culvert, but that resulted in water coming from both the culvert and down the hill. White suggested putting a fiber filter into a pipe to improve water quality that would be changed every year. Gappa stated that the area of concern was much too large to be affected by a filter. Mayor Peterson asked if the pipe and swale solution was a temporary fix. Gappa stated that the low -cost pipe and swale plan would get water past the houses, solving that issue, but not improve water quality. White asked if the pipe would affect landowners' ability to build on their lots. Gappa stated they would have to work around the pipe, but it should not be a major issue. Mayor Peterson moved, and Murphy seconded, to accept the quotation from Norling's Lake Minnetonka Landscaping in the amount of $13,418.12 for completion 0 12