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2018-02-28 CC Packet
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2018-02-28 CC Packet
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( Stantec <br /> CITY OF CENTERVILLE -2018 LOCAL WATER PLAN <br /> CAPITAL IMPROVEMENTS PLAN <br /> These locations are identified in Figure 11, the Capital Improvement Plan Map. The total <br /> footage of drain tile that would have to be added to complete the improvements listed <br /> above is 4200 ft. The City has completed previous drain tile projects consisting of <br /> trenching an 18" wide and 18" deep trough by installing river rock with tile surrounded by <br /> fabric and covered with 4" thick of pea rock on top. In 2009, this cost$50/ft. Costs to <br /> complete these improvements today would depend upon the location, length of run, <br /> elevation, and tree roots/other obstacles. Accounting for inflation and assuming a cost of <br /> $50/ft would mean these improvements would cost roughly $230,000. On October 9th' <br /> 2013, the City passed Resolution #13-022 which authorizes the City to participate in <br /> resolving public drainage problems. The City participates in the cost of drainage facilities <br /> by sharing in 25% of the cost of the project to be paid from the Stormwater Fund, <br /> provided the property owners agree to voluntarily be assessed for the remaining 75% of <br /> the cost. Thus, the City would pay $57,500 towards these listed backyard drainage <br /> issues. <br /> 2. LaMotte Stormwater Reuse System Expansion: The current stormwater reuse system <br /> will be expanded to include additional area in LaMotte Park, as well as Hidden Spring <br /> Park. Three additional spray heads ($75,000 total) will need to be added to LaMotte <br /> Park. A full irrigation system, similar to that which was installed in LaMotte Park, will <br /> need to be added to Hidden Spring Park ($120,000). <br /> 3. LaMotte Stormwater Reuse System Upgrades: Given the recent regulatory scrutiny of <br /> stormwater irrigation in the State of Minnesota, the City may be forced to add advanced <br /> filtration and/or a UV disinfection system to the stormwater irrigation system in LaMotte <br /> Park. UV disinfection would help eliminate microbiological contamination; water is run <br /> through a watertight chamber containing UV light which produces a lethal dose of UV <br /> light to microorganisms. It is estimated that advanced filtration would cost$150,000, <br /> while UV disinfection would cost$100,000. <br /> 8.4 ONGOING STORMWATER MAINTENANCE ITEMS <br /> 1. Stormwater Pond and Rain Garden Dredging: Like other cities in the Twin Cities <br /> Metropolitan area, the City of Centerville has many public stormwater ponds and rain <br /> gardens, which may need to be dredged. Dredging will likely be the most financially <br /> cumbersome capital improvement for the City, and prudent financial planning to <br /> accommodate this need is important. <br /> There is some guidance provided by Don Berger, of the MPCA Municipal Division, <br /> entitled Cost Estimates for Minnesota Stormwater Collection Systems. Stormwater <br /> ponds, as do raingardens, need to be dredged frequently to maintain their efficiency. <br /> Dredging will get rid of solid and semisolid wastes, including soil loss from open areas, <br /> 8.31 <br /> 83 <br />
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