06-04-2015 Parks Comm. Minutes - Laserfiche WebLink

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MINUTES PARKS & RECREATION COMMISSION June 4, 2015 money, but the lower bid had no aesthetic features. Miller and Sanders noted this was definitely something that should be further discussed. Sanders asked about the drainage throughout Pioneer Park. The City Engineer said all of the water drains into the North and South Ponds. Once the ponds are filled, the water drains through a pipe that runs down Desoto and drains into Patrina Pond Systems. Sanders asked how deep the swale was. The City Engineer said the swales max depth is 3 or 4 feet. Sanders asked if there were ever any flooding issues at the surrounding townhomes. The City Engineer said there is a small swale located near the townhomes that water can drain into, but ultimately runs into the same pipeline that the other water runs through. He also mentioned the water probably drains slower than homeowners would like, but doesn't know of any flooding problems. After discussing the swale, the proposed Infiltration/Rate Control Pond was discussed. The City Engineer explained this pond is for the proposed water drainage at the Northwest corner of Pioneer Park. Currently, Centerville Road is in poor condition and needs to be redone. Since it is a county road, the city asked the county to have it fixed. The city will have the work done, and then be reimbursed by the county once it is finished. The city has just postponed this project until next year's construction season because they felt there wouldn't be enough time to finish it before Canadian Days or this winter. There is a need to move many of the power lines along Centerville Road, and they can't be moved until late August. The City Engineer further explained this construction project is also complicated because the road has to be moved to the West so a sidewalk can connect Spooner Park to Pioneer Park on the East. With this construction, there has to be a spot to treat the rain water according to Watershed rules and City ordinances. The rain water cannot drain directly into the MNDOT right-of-way because that would increase the drainage rate which the city is not allowed to do. By creating the Infiltration/Rate Control Pond the city can regulate the water and hold it until it can be drained at the allowed rate. The City Engineer said drain tile will be used to drain the pond quickly because the soil in that area wouldn't be good for rapid drainage and filtration. Sanders asked if the pond's drain tile would also drain the North end of the park. The City Engineer said currently it would not, but in the future it could be changed to allow water from the park as well. Sanders was also concerned about the aesthetics of this project since so many trees will have to be removed from the current wooded area. Sanders asked the City Engineer if the trees would suffice for proper filtration because they can soak up so much water. He explained that each tree can soak up over 100 gallons. The City Engineer said this would be a bad idea because the trees would eventually die from so much rain. He used the pond east of 694 and Rice Street as an example. There used to be many trees in this area that were left standing, but now they have died and fallen. Maida asked how large the buffer would be surrounding the pond. The City Engineer said he included a 2