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TR-54 Revised 03/257 <br />TABLE 15-3 <br />Summary of Ground Water Monitoring Sites, Yoast Mine <br />Well USGS Formation Well Depth Casing Surface Historic <br />Number Number Coordinates Completed In (ft) Dia. (in) Elev. (ft) Remarks Water Quality Data <br />____________________________________________________________________________________________________________________________________________________ <br />YSAL1 A1 S 35,180.90 Sage Creek 39.1 4 7174.93 Discontinued, Abandon 2025 Yes <br />W 9,544.48 Alluvium <br />YSAL2 A2 S 35,020.85 Sage Creek 40.0 2 7179.47 Discontinued, Abandon 2025 No <br />W 9,344.12 Alluvium <br />YSAL3 A3 S 36,967.39 Sage Creek 44.0 2 7223.53 Point of compliance well Yes <br />W 8,585.95 Alluvium <br />YSAL4 A4 S 37,206.98 Sage Creek 59.0 2 7230.80 Discontinued, Abandon 2025 No <br />W 8,443.68 Alluvium <br />YSAL5 A5 S 37,224.27 Sage Creek 45.0 2 7233.33 Discontinued, Abandon 2025 No <br />W 8,393.76 Alluvium <br />YSAL6 A6 S 39,713.05 Sage Creek 40.0 2 7318.08 Discontinued, Abandon 2025 No <br />W 8,935.08 Alluvium <br />YSAL7 A7 S 39,717.24 Sage Creek 45.0 2 7325.21 Discontinued 10/95, duplicate well No <br />W 8,836.39 Alluvium <br />YSAL8 A8 S 39,707.34 Sage Creek 20.0 4 7324.76 Discontinued, Abandon 2025 Yes <br />W 8,840.15 Alluvium <br />YSAL9 A9 S 39,697.69 Sage Creek 20.0 4 7324.52 Discontinue 10/95, duplicate well No <br />W 8,842.49 Alluvium <br />YSAL10 A10 S 39,715.52 Sage Creek 53.0 2 7330.13 Abandoned 10/01 (TR 22) No <br />W 8,732.48 Alluvium <br />YSAL11 A11 S 41,880 Sage Creek 40.0 2 7382 Well destroyed by farming, No <br />W 9,200 Alluvium location and elevation estimated <br />Last data 8/83 <br />YSAL12 A12 S 41,972.54 Sage Creek 40.0 4 7381.13 Discontinued, Abandon 2025 Yes <br />W 9,052.38 Alluvium <br />YSAL13 A13 S 42,025.40 Sage Creek 30.0 2 7384.23 Casing damaged by farming, No <br />W 8,963.62 Alluvium well abandoned 8/96