2022-091 Council Resolution - Laserfiche WebLink

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Biological filtration is commonly practiced in the United The ability for the plant to operate in parallel(one States and Europe and is endorsed by the Minnesota half of the facility under repair or maintenance while Department of Health(MDH)as an efficient and effective the other half maintains operation):The plant should method for treating these(and other)contaminants. be designed with individual filter cells that can be The cities of Minneapolis,St. Paul,and St.Cloud are removed from service and a split clearwell tank(wall now utilizing biological filtration at their water treatment down the middle)and high service pumps to meet this plants.The benefits of biological filtration include higher requirement. filtration rates, longer filter runs(reduces backwash Architectural features in the facility design:Office supply and wastewater volumes),savings in chemical space/control room,access for chemical delivery, costs,and reduction in disinfection byproducts.The parking for staff and visitors, laboratory facilities, design of a conventional gravity filtration process landscaping around the site,storage room(for with detention and aeration can easily accommodate meters, meter parts,compressor parts,water sample biological filtration. supplies, and water plant parts),and a garage for city maintenance vehicles and/or other large pieces of OTHER DESIGN CONSIDERATIONS WILL equipment. INCLUDE THE FOLLOWING: New 24-inch and 20-inch diameter raw watermains Design for the proper size of clearwell to store treated will be constructed on Birch Street to convey raw water and backwash tanks including provisions water from Wells 1,3,5,and 6 to the new water for water overflow and discharge from backwash treatment plant site: New transmission mains will also tanks:The proposed water treatment facility site will be constructed to pump the treated water from a new require an efficient footprint to save space and reduce finished water clearwell into the city's water distribution unnecessary costs. system.To properly size the high service pumps, WSB If requested by the city,we will study an innovative will use the city's existing water distribution system design for this site that could significantly reduce the model to model the expected discharge pressures in building footprint.The plant could be designed with a the distribution system with the pumps operating at clearwell that is located directly below the gravity filters minimum to maximum capacity. which would significantly reduce the footprint of the facility and the cost of the plant structure. Funding Obtaining funding for this large infrastructure project will be one of the most important work tasks for this project.WSB has evaluated and applied for funding from various funding sources such as federal earmarks,the bonding bill, and the PFA Drinking Water Revolving Fund(DWRF).Our team has extensive experience in preparing and submitting bonding bill and federal earmarks applications for proposed water treatment facilities.WSB has experience administering PFA funded projects through the Drinking Water Revolving Fund Program from previous water treatment facility projects. A Proposal for Design,Bidding,and Construction Administration for a Water Treatment Plant for City of Lino Lakes Project Understanding&Approach 13