Laserfiche WebLink
comparisons of these data indicate that TDS concentrations are quite similar upstream and dotimstream of the mine. <br />Thus, there is no observable effect of mining on conductivity levels and total dissolved concentrations in the Williams <br />Fork River. As expected, conductivii)~ decreases with increasing flow rate in the nvers. This is due to the effects of <br />• snorvmelt and high rainfall diluting the water. <br />Plots of total recoverable iron measurements for the Williams Fork River are presented in Figures 58AK and 58AL for <br />upstream station WF-] and downstream station WF-2, respectively. The comparisons of these data indicate that total <br />recoverable iron concentrations are nearly identical upstream and downstream of the mine on the Williams Fork <br />Rtver. The annual means in some years show slight increases at the downstream station due to slightly higher <br />concentrations for the annual maximum total recoverable iron concentrations. However, water quality differences <br />appeared to be within the statistical variation at each location. Total ecoverable iron generally increases with <br />increasing flow rate in the river. This is due to the increase in suspended solids, which includes forms of iron, which <br />appear in the analysis of total recoverable iron. <br />Plots of pH measurements for the Williams Fork River are presented in Figures SBAM and S8AN for upstream station <br />WF-1 and downstream station WF-2, respectively. The comparisons of these data indicate that there is no trend in pH <br />or observable difference in pH upstream and downstream of the mine on the Williams Fork River. <br />Plots of total suspended solids measurements for the Williams Fork River are presented in Figures 58A0 and SSAP <br />for upstream station WF-1 and downstream station WF-2, respectively. The comparisons of these data indicate that <br />total suspended solids concentrations are nearly identical upstream and downstream of the mine on the Williams Fork <br />River. Total suspended solids increase with increasing flow rate in the river. <br />Protection of Public Parks and Historic Places <br />No public parks are located within the permit or adjacent areas; therefore, the RAG Empire operation will not affect <br />any public parks. Likewise, the operation will not affect any places included or eligible for listing in the Nations <br />• Register of Historic Places. Because no public parks or historic places will be adversely affected by the RAG Empire <br />operation, this section of the regulations is not applicable. <br />Surface Mining Near Underground Mining <br />RAG Empire will conduct underground mining only. The only surface aaivity will be the ongoing reclamation of <br />previously mined and now abandoned strip pits. <br />2.05.6(6) SUBSIDENCE MONITORING, SUBSIDENCE SURVEY, AND SUBSIDENCE CONTROL PLAN <br />These sections present the necessary subsidence information required by the Colorado Mined Land Reclamation <br />Division for RAG Empire's Eagle Mine Complex. An inventory of all strucmres and renewable resource ]ands in the <br />permit area has been performed, and a determination of material damage or diminution of use for areas of planned <br />mining has been incorporated herewith. A subsidence control plan and a limited subsidence monitoring program are <br />presented for the appropriate mining areas. An inventory of all structures and renewable resource lands is presented <br />on Table 78, Inventory of Structures and Renewable Resource Lands. The locations of all structures and renewable <br />resource lands are shown graphically on the Structures and Renewable Resources Map (Map 25). <br />Structures <br />The following structures have been identified within and adjacent to the permit area: <br />• Mine Facilities (not undermined) <br />• Mine Facilities (presently undermined) <br />• • Mine Facilities (to be undermined) <br />-rr~33 <br />Midterm Response 2.05-48 _ , ~_, 7/30/01 <br />~.._ u ...,...... <br />