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3 <br />• <br />2 LOCATION AND INSTALLATION OF WINDY GULCH WELLS, DRIVE <br />POINT PIEZOMETERS, AND WEIRS <br />WMCI completed a number of monitoring installations in the Windy Gulch drainage during the <br />period from October 27 through November 8, 1998. These included two shallow bedrock wells <br />adjacent to Windy Gulch at the 9360 dump, five shallow drive point piezometers along Windy <br />Gulch, and three weirs in Windy Gulch. The site monitoring locations are indicated on Plan 2.1. <br />2.1 Monitoring wells <br />Two wells were installed along Windy Gulch during this program. The location of each well is <br />indicated on Plan 2.1. A summary of the well construction details and locations is provided in <br />Table 2.1 and discussed below. A detailed well log for each well is included in Appendix A. <br />C <br />Table 2.1 Summary of well construction details and well locations <br />Well Casing diameter Completion Stickup Northing' Easting' Ground Surface <br /> interval depth length Elevation' <br />(in) (ft) (ft) <br />HW-1 2 13-35 2.29' 110,213.6 116,169.5 9355.3 <br />HW-2 2 150 1.58' 110,285.5 116,039.7 9364.8 <br />• Coordinates and elevations based on Homestake site baseline and datum. <br />All depths measured from ground surface. <br />2.1.1 Shallow bedrock well (HW-1) <br />HW-1 was drilled to the east of Windy Gulch, just north of the 9360 Dump (Plan 2.1). The hole <br />was drilled to a total depth of 35 ft and completed in the Creede Formation using 2-inch diameter <br />schedule 40 PVC casing and screen. The well screen was placed from 21.5 ft to 31.5 ft, with a <br />sand pack completed from 13 ft to 35 ft. The well head was finished with a locking cover to <br />prevent tampering. The ground surface at the well is about 5 ft above the adjacent channel of <br />Windy Gulch. Immediately fallowing completion, the well was developed by bailing. In June 1999, <br />HW-1 was further developed with an air compressor pump. <br /> <br />