2022-091 Council Resolution - Laserfiche WebLink

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EXAMPLE AWARD NOMINATION I WEST WATER TREATMENT PLANT __-------.-_._-________--- I CHANHASSEN WATER TREATMENT PLANT DEVELOPMENT s - ,r Chanhassen is a growing Twin Cities suburb that is a below grade clearwell,filter backwash tanks,and focused on advancing its development.In 2006, backwash claim system that recycles over 95 percent Chanhassen opened its first water treatment plant, of the filter backwash wastewater. which removed iron and manganese.Located on the eastern edge of the city,the plant served the low After detention,the water splits before reaching pressure zone,which wrapped around the higher the filters,featuring two banks of three anthracite portions of Chanhassen;leaving an enclave on the greensand filters.Both the east and west plants pump west side that did not receive treated water.Within into the low-pressure zone,the main zone in the city. this area,the City owned land and had plans to build The west plant serves the higher areas of the city and a second water treatment plant.Prior to planning,the was designed intentionally oversized to support future surrounding area was filling in with large residential growth in the community. homes and homeowners who became concerned about a utilitarian facility in their neighborhood. A stormwater reuse system allows the City to recycle The City and WSB,moved forward with plans for a stormwater on site for irrigation and landscaping new water treatment plant while also meeting with around the plant and adjacent boulevard along Lake representatives of the homeowner's association in Harrison Road.Utilizing non-treated water for irrigation the Lake Harrison neighborhood.Eventually,the will save the City millions of gallons of treated water community settled on a prairie-themed design for the and chemical costs per year. plant building and adjacent land.The facility was built into a hillside,which required a great deal of earth moving.The new water treatment plant provides a 1 pleasing aesthetic for residents,while keeping less attractive elements of the facility hidden from view. The plant has a treatment capacity of 9 million gallons- per-day and was specifically designed to treat the natural iron,manganese,and ammonia levels that exist in the City's aquifer.Based on pilot plant testing and initial observations,the plant was designed with R emu» pressure aeration,detention,concrete gravity filters, 2 A Proposal for Design,Bidding,and Construction Administration for a Water Treatment Plant for City of Lino Lakes Appendix';44