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Shrine Runoff <br />Carbon Junction Canyon drains approximately 500 acres or 0.80 square miles of <br />surface. Surface water flow in Carbon Junction Canyon is ephemeral, and flows occur <br />in response to snowmelt and high intensity and/or duration precipitation events. <br />During summer and fall months surface flow is only observed following significant <br />precipitation events. Table 4-Sa contains 1981 flow data. Flow varied from 0.0 to 1.9 <br />gpm. A significant precipitation event occurred on September 13, 1982. A sample of <br />water was taken from [he only location still exhibiting sufficient flow (< 1.0 gpm) on <br />September 15, 1982 (Map 4-3). The results of water quality testing are shown on <br />Table 4-7. <br />A spring and seep inventory was conducted using aerial photos, water rights <br />information and a field survey. The results of the inventory are shown on Map 4-3. <br />Spring No. 1 (C.J. Canyon Up) flowed at 5 gpm on September 17, 1982, 5 days after a <br />precipitation event. Spring No. 1 was dry on October 8, 1982 which indicates that this <br />spring flows in response to precipitation events. On October 8, 1982, samples of <br />Spring No. 3 (REA SPG #3) and Spring No. 4 (CJ-LO-SPG #4) were collected. <br />Results of water quality testing are shown in Table 4-6. <br />Spring No. 3 (REA SPG #3) and Spring No. 4 (CJ-LO-SPG #4) exhibit relatively poor <br />• water quality. The electrical conductivity and total dissolved solids concentrations are <br />high on a comparative basis. The sulfate concentrations are also high. The "high" <br />relationship referred to above is on a comparative basis to potable water. <br />Annual Hydrolo@c Reports (AHRI <br />Oakridge Energy has continued surface and groundwater monitoring under the <br />approved monitoring program. In 1996, a complete compilation and summary of water <br />monitoring data was provided to CDMG in the Carbon Junction Mine (C-92-080) <br />Annual Hydrologic Report, 1995 Water Year. Subsequent Annual Hydrologic Reports <br />have been prepared and submitted to CDMG. Annual Hydrologic Reports will be <br />submitted to CDMG by March 31 of the calendar year following the fourth quarter of <br />the water year. Water years begin on October 1 and run through September 30 of the <br />following calendar year. <br />Based on water monitoring, there have been no identifiable impacts to the hydrologic <br />balance as a result of the mining activity to date. As expected, surface flow has <br />dramatically responded to snowmelt runoff and large precipitation events. Otherwise, <br />impacts from the mining operations have not been observed nor are expected to occur. <br />Quality and quantity of the surface water is "as expected" in the original permit. <br /> <br />Techpical Revision 09 (v 1.0) 413 Revised 3/1998 <br />