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suspect level for material damage for water used to irrigate hay crops. SPL estimated <br /> production losses resulting from the increase in salinity. Based on the information <br /> provided by SPL, the Division finds that no material damage will occur. <br /> Dry Creek <br /> SPL projects impacts from all spoil springs will increase TDS in Dry Creek from 1,048 <br /> mg/1 to 2,451 mg/l. The TDS increase extends from Hubberson Gulch to the Dry Creek <br /> reach monitored by Station WSD5 (upstream of the fields irrigated from Temple Reservoir <br /> #I). At this location, the baseline TDS level in Dry Creek begins to increase downstream. <br /> At a downstream location in Dry Creek,the TDS concentrations are elevated enough <br /> (TDS = 3,567 mg/1) that the cumulative spoil discharge influences from both mining <br /> areas (Seneca IIW and Seneca IIW South Extension) will be minimal. The source of the <br /> salt loading to Dry Creek is principally seepage from dry land farming that extends from <br /> the hillslopes at the base of the mountains to Hayden. Dry Creek water is mixed with <br /> water from the J.C. Temple Reservoir #1 for irrigation in fields below this reservoir. The <br /> Division finds that there will be no material damage to water in Dry Creek since the <br /> background TDS levels are higher than the projected TDS levels from Hubberson Gulch. <br /> 1. The applicant conducts monitoring of ground water in a manner approved by <br /> the Division. The ground water monitoring plan is as found in Tab 15 <br /> Appendix 15-3 (4.05.13(1)): <br /> 2. The applicant conducts monitoring of surface water in a manner approved by <br /> the Division. The monitoring plan was submitted under 2.05.6(3)(b)(iv) and <br /> in described in Tab 15 Appendix 15-3 (4.05.13(2)). <br /> G. Discharge of Water into an Underground Mine <br /> There will be no discharge of water into an underground mine from this operation. <br /> IV. Topsoil <br /> Soil resource information is provided in Tab 9, Volume 5 of the permit application. <br /> Information on topsoil handling, maintenance and testing comprises Tab 21, Volume 13. <br /> The PRI submittal extensively reorganized the soils sections of the application and <br /> updated the soil baseline information reflecting a 1990 survey of portions of the north <br /> mine area not previously surveyed. Baseline data had been collected for the South <br /> Extension Area covered in PR2, and in 1997 SPL conducted a topsoil depth verification <br /> survey to confirm the topsoil resource information collected previously. This information <br /> is also included in Tab 9. The referenced permit sections were further amended to <br /> address the expanded disturbance area associated with PR3. In PR5, the Soil Survey <br /> Map (Exhibit 9-3)was updated to reflect disturbance boundary modifications in the <br /> southern Wolf Creek/Sage Creek block in the south extension area. Cessation of mining <br /> operations earlier than originally anticipated resulted in a reduced area of disturbance in <br /> the deep 70D soil map unit. Associated updates were made to the Soil Replacement Map <br /> (Exhibit 21-1) and topsoil balance narrative and tables in Tab 21. <br /> SPL stripped topsoil in single lifts once the woody vegetation was removed, pursuant to <br /> 4.06.2(1). Topsoil was redistributed immediately on regraded areas when possible or was <br /> stockpiled in designated storage areas pursuant to 4.06.1(2). <br /> V. Sealing of Drilled Holes and Underground Openings <br /> Page 27 of 37 <br />