09-14-1998 Council Packet - Laserfiche WebLink

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GITYofORONO Municipal Ofllces Street Address: 2750 Kelley Parkway Oroflo. MN 55356 Mailing Address: P.O. Box 66 Crystal Bay, MN 55323 0066 ^ 0 • % w.' ■ w • ■ To: Project Area Residents; Subject: Navarre Water Treatment Plant Rehabilitation SEP 1 4 19S8 CITY or ORONO The Navarre Water Treatment Plant Rehabilitation provides Iron and Manganese removal filtration and softening for the Navarre water system. The plant was originally constructed in 1971. The existing control systems and the filter media in the plant are past their usable service life. Also, one of the three softening units is currently not operating because of corrosion problems. This has resulted in uneven water quality. The softening levels have varied considerably over the past several years. A project to complete a major rehabilitation of this plant was recently approved by the City Council. This project will provide for a consistent filtered and softened high quality water in the Navarre system. Work on the rehabilitation project is scheduled to start on September 15th and be completed in April 1999. During project construction, the City will be obtaining water from the City of Spring Park. This water is filtered to remove the Iron and Manganese, but will not be softened. The scheduled date for the switch to Spring Park water is September 28th. Approximately half of the homes in the Navarre water system have water softeners. These residents may notice an increase in the amount of salt required for water softening during this time. Residents that do not have water softeners may notice impacts from using unsoftened water such as more soap required for washing clothes, etc. Although this will result in an inconvenience, the use of unsoftened water during the time period for the plant rehabilitation should not have any long term impacts on the water supply system or household plumbing. When this project is completed, residents with water softeners may wish to reevaluate the use of their water softeners. Over the past several years, the level of softening produced by the Navarre Treatment Plant has varied considerably and home softening has been necessary at times. The softening levels have varied from 50 mg/1 to 300 mg/1 with the most readings in the 100 to 150 mg/1 range. After plant rehabilitation the water will be softened to 60 mg/1 which is a desirable level. This will essentially eliminate the need for home water softeners. Telephone (612) 473-7357 • FAX 473-0510