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2025 Well Study: Wellfield Evaluation <br />and Field Investigation <br />Pink Polygon indicates buried <br />clays are more common; <br />however, thickness of days <br />vanes greatly and likely 10 find <br />high producing sand and <br />gravels underlaying clays. \y <br />7 <br />Potential area of shallow <br />depth to bedrock <br />(between 50 and 100 feet <br />This project identified and evaluated exploratory boring locations, existing wells, <br />and published depth -to -bedrock data. <br />The City of Sartell needed a fourth supply well at its Southwest Wellfield. SEH completed Project Details <br />the work in two phases, the same structure this RFP requires. <br />CLIENT <br />c Phase 1: SEH reviewed the county geologic atlas, well records, and the original 2007 City of Sartell <br />wellfield study. SEH analyzed SCADA data to check interference between the existing <br />wells. SEH recommended two exploratory boring locations. YEAR COMPLETED <br />c Phase 2: SEH subcontracted the drilling contractor directly. The contractor advanced 2025 <br />two sonic borings to bedrock. An SEH geologist logged the borings on site. SEH ran <br />step tests at 100, 200, and up to 300 gpm at each location. <br />o SEH coordinated sieve analysis and screen design with Johnson Screens and collected <br />water quality samples. <br />o Both locations proved suitable for a high -capacity well. SEH gave the City clear <br />recommendations on location, spacing, and MDH isolation distances. <br />REFERENCE <br />Bartt Gevens <br />320.258.7339 <br />Bartt.Gevens@sartellmn.com <br />KEY PERSONNEL <br />Mark Sherrill <br />Melanie Niday <br />Chris Larson <br />SHORT ELLIOTT HENDRICKSON INC. <br />WELL SITING ASSESSMENT FOR MUNICIPAL WELLS #9 AND #10 <br />