CC MINUTES 05142013 - Laserfiche WebLink

Home Browse Search

City Council Regular Meeting Minutes May 14, 2013 Page 2 1 V. 2 3 VI. 4 5 6 7 8 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 REPORTS FROM COMMISSION AND STAFF - NONE. GENERAL BUSINESS OF COUNCIL. A. Resolution 13-040• a Resolution Accepting Salo Pond Water Quality Improvement Proiect Plans and Specifications and Ordering Advertising for Bids. Todd Hubmer. WSB & Associates. presenting. City Engineer Hubmer explained that Silver Lake has been listed as impaired by the Minnesota Pollution Control Agency (MPCA) for excess nutrients and the MPCA, in conjunction with the Rice Creek Watershed District, completed a TMDL study that indicates phosphorus needs to be reduced by 38.2 pounds per year. He indicated the State's water quality standard for total phosphorus is 60 parts per billion and the planned water quality treatment system at Silver Lake will improve water quality. He advised the State's standard for Chlorophyll A is 20 micrograms per million and Silver Lake has exceeded this standard in almost every year and needs to reduce algae production in the lake. He stated the State's goal for average water clarity is approximately one meter and over the last three years the City has achieved its water quality goal during the summer months but there were five years during which the City did not meet this goal. He explained the City is proposing to construct a chemical treatment system similar to the system used for treating drinking water where chemicals will be added to the lake that attach to phosphorus and the water is then filtered out with clean water coming into the south pond of Salo Park that gets flushed through to Silver Lake. He stated this treatment will achieve 90% of the TMDL goal of reducing 29 pounds of phosphorus per year. He indicated the project will be funded up to $150,000 by the MPCA as well as $50,000 by Rice Creek Watershed District and the remaining $100,000 being paid by the City. He stated the project will have ongoing maintenance costs of $15,000420,000 per year and will require first year operation costs for calibration and monitoring. He noted the City's obligation of $100,000 will come from the annual street reconstruction project because the project will meet permitting requirements and will allow the City to bank credits for future projects. He advised the City is working on final plans and specifications and bids will be awarded on June 25's with submission of bid plans and specifications to the MPCA for certification on June 26`x'. He stated most utility contractors are able to handle this type of project because it involves a system similar to a water treatment plant. He indicated construction is not going to start until October or November this year and the project will take five to six weeks. Councilmember Stille asked if there would be noticeable improvements after installation of the treatment system. City Engineer Hubmer replied that the City will see significant improvements in a five or six year time period after installation of the treatment system and as a result of the City's carp management program. Mayor Faust pointed out that these improvements are mandatory to meet State standards and the requirements of the Rice Creek Watershed District.