Minutes - Public Works Committee - 04/16/2019

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City Engineer Westby stated that the Council previously reviewed the PSD, LLC proposal for exchanging City-owned land west of Armstrong Boulevard for land owned by PSD south and east of the Medical Examiner building that is needed to construct the infiltration basin and staff is working with PSD to finalize the details of this transaction. He believed that agreement would th be ready for the May 14 Council meeting as well. Chairperson Kuzma asked for details on the fill that would be moved from the site. City Engineer Westby stated that this project will generate approximately 35,000 cubic yards of soil that will need to be exported. Based on the need for fill within two other areas of The COR, the plans incorporate provisions for the contractor to place the excess fill in those areas after installing erosion control measures (silt fence) and stripping the existing topsoil to expose the underlying granular material. This base material will be tested and compacted, and the imported fill will be placed in specified lifts that will be compacted and documented. He noted that the area south of Sunwood Drive and east of Zeolite Street was identified as one of the sites for the excess fill. Bringing this site to grade will accomplish two things. It will address a concern raised by the Minnesota Department of Health about the area around the municipal well being depressed and holding water. It will also make the site more marketable. The remainder of the fill will be placed in the Municipal Plaza recreational area north of Sunwood Drive and west of Center Street. Councilmember Riley asked why there are so many wells so close together. City Engineer Westby stated he is unsure what drove this decision. Civil Engineer IV Linton explained that for some wells there is one treatment center serving two wells. Public Works Superintendent Riemer stated that the original thought was to have a water treatment plant near the fire station and therefore the wells were setup to support that. Motion by Councilmember Riley, seconded by Councilmember Shryock, to recommend City Council approval of Plans and Specifications and authorization to advertise for Bids for The COR Infiltration Basin Improvements, Improvement Project #18-09. Motion carried. Voting Yes: Chairperson Kuzma, Councilmembers Riley and Shryock. Voting No: None. Councilmember Riley asked if the infiltration basin would be constructed this year. City Engineer Westby replied that construction is estimated to take 60 to 75 days, depending on weather. Construction must therefore start by mid-July to ensure completion by the deadline of September 30, 2019. If the Council approves plans and authorizes ads for bids on May 14, bids could be advertised May 17 and 24, bids could be opened June 7, and awarded on June 11. At that time, the Contractor could order the lift station, which has an anticipated delivery lead-time Public Works Committee / April 16, 2019 Page 3 of 6