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WSB PROJECT EXPERIENCE EXAMPLE <br />Lime Softening Water Treatment Plant Improvements <br />CLIENT CITY OF TONKA BAY <br />LOCATION: TONKA BAY, MN <br />DURATION: DEC 2019 <br />11 <br />WSB evaluated, designed, and provided construction <br />services for improvements to an existing 1,000 gallon per <br />minute (gpm) lime softening water treatment plant (WTP). <br />The WTP was originally constructed in 1972 and <br />included a lime silo, lime slaker, clarifier (contact basin), <br />recarbonation basin, three filters, backwash reclaim, and <br />a clearwell. Given the plant's age, several process and <br />electrical components were in very poor condition and <br />made it difficult for the city to deliver consistent water <br />quality. After careful evaluation of the existing conditions <br />and improvement alternatives, it was decided to upgrade <br />the existing pebble lime feed system to a hydrated <br />lime feed system, to replace several of the process and <br />electrical components, and to rehabilitate the existing <br />building structure and architecture. The updated <br />process and electrical equipment will allow for greater <br />automation of the treatment processes and will reduce <br />the operational burden on city staff. <br />WSB STAFF: GREG JOHNSON, JON CHRISTENSEN, GREG <br />GLUNZ <br />A Proposal for Design, Bidding, and Construction Administration for a <br />Water Treatment Plant for City of Lino Lakes <br />Relative Experience, Qualifications, & References 29 <br />