Agenda - Council - 10/27/2026 - Laserfiche WebLink

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Driller Quote Comparison We have provided quotes from two licensed Minnesota well contractors for the assumed test well construction shown on page 6: a 14-inch borehole with 10-inch outer casing to the top of bedrock at about 220 feet, a 6-inch inner casing seated in bedrock at about 250 feet, open hole into the Wonewoc Sandstone, well development, and a 72-hour pumping test at each well. Both contractors quoted two casing strings. The 10-inch outer casing holds the unconsolidated section open while the 6-inch casing is set and grouted, as Minnesota Rules 4725 requires when a well passes from glacial sediments into bedrock. Traut notes the 10-inch casing may be omitted if drilling fluid circulation holds in the upper Tunnel City aquifer, which would be decided at the first test hole and would lower cost. The two quotes differ by about $150,000 for four wells. Most of that difference is winter work. Traut carries ground thaw equipment for the containment dumpsters ($36,000), vac trucks to haul drill fluid that cannot be discharged on frozen ground ($47,920), and 48 days of per diem ($28,800). Traut also states that production drops when temperatures fall below 10 degrees Fahrenheit and that snow removal is not included. SCOPE COMPARISON ITEM TRAUT COMPANIES (SEPT 25, 2026) E.H. RENNER AND SONS (SEPT 10, 2026) Basis Four wells, winter drilling One well, no season stated Total depth About 400 ft (150 ft open hole) 320 ft (70 ft open hole) Casing 10-inch to 220 ft, 6-inch to 250 ft 10-inch to 200 ft, 6-inch to 250 ft Development 20 hours per well 8 hours per well Gamma log Included Add $4,500 Drill fluid and cuttings containment Dumpster, ground thaw, and vac trucks included Add $5,000 Per diem and mobilization $35,000 mobilization plus 12 days per diem per well $10,000 mobilization Schedule 15 drilling days per well Not stated Quoted total $709,675 (four wells) $123,811 (one well) Adjusted to four wells at 400 ft with gamma log and containment $709,675 About $559,000 FEE COMPARISON DRILLER QUOTES TRAUT COMPANIES Per Well All 4 Wells E.H. RENNER & SONS Per Well All 4 Wells Estimated Subcontractor (Drilling) - four test holes, four aquifer $177,419 $709,675 $123,811 $495,242 tests Optional - Subcontractor (Drilling) with additional 80 ft of depth Included per boring $6000 $24,000 Geophysical logging Standard Water Quality (WA COLIFORM, NO3, & ARSENIC) DRILLER QUOTE TOTALS Included Not Quoted $4,500 $18,000 $223 $890 Eller "lam $520,902 NOTES c Drilling contractor quotes are shown as a separate lines and will be refined to match expected geology once test well locations are finalized with the City. Additional drilling contractor costs to meet expected geology and well design may be necessary and are not included in this proposal. SHORT ELLIOTT HENDRICKSON INC. WELL SITING ASSESSMENT FOR MUNICIPAL WELLS #9 AND #10