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Filter Type Site Estimated Cost Gravity Filters East Site 13,500,000 Gravity Filters West Site 13,125,000 Pressure Filters East Site 11,850,000 Pressure Filters West Site 11,475,000 DRAFT 8 -17 -07 TKDA recommends the City use blending in their water system. A blending option is used by many cities. This provides for blending some raw water with treated water on peak days. This allows the treatment plant to be smaller while a few days a year the iron and manganese levels will be slightly higher. We propose a 20% blend of raw water. This lowers the plant capacity from 10.4 million gallons /day to 8.4 million gallons /day. TKDA looked at 3 types of filter designs to remove the iron and manganese. Two of these three were determined to be viable options for Lino Lakes, manufactured gravity filters and pressure filters. Floor layouts were determined for both types of filters and costs of the filters were also reviewed. The floor area needs and filter costs were used to determine the cost of the estimated treatment plant. The site plan at each site was prepared. The proposed site plant shows the City needs a minimum 3 acre site, and depending on spacing and screening, it could be 4 acres. A plant rendering was made to show what a plant may look like on a future plant site in a neighborhood. In order to obtain all the costs for a treatment plant option, the raw water main costs were determined to bring water from all wells to the two treatment plant sites. This will help determine which site is the most cost effective. Based on all this data, 4 estimates were made. These are estimates for each of the two filter types at each of the locations for a total of 4 estimates. They are as follows: There is some discussion of funding issues in Chapter XIII. We showed funding coming from current residents and through the future developments. Actual funding can come through water rates, building a reserve, or selling revenue bonds. Water Treatment Plant Study 24 13843.000