PERMFILE57724

• Permit No: C1983058
• IBM Index Class Name: Permit File
• Doc Date: 12/11/2001
• Section_Exhibit Name: 2.05.6 MITIGATION OF UNDERGROUND COAL MINING OPERATION IMPACTS
• Media Type: D
• Archive: No

51~ 05.6 MITIGATION OF UNDERGROUND COAL MINING OPERATION IMPACTS 1~~'1111~'llrl~I'l~
Doc Date:12N1/2001
1). Air Pollution Control Plan
A copy of the Fugitive Dust Permit is enclosed in Appendix C.
2). Fish and Wildlife Plan
The mine site in its existing state is not conducive to the
enhancement of fish and wildlife. Reclamation of the site has
provided some grazing and water for wildlife. Rare or engangered
species are not affected by the mine.
3).Protection of the Hydrolozical Balance
A. Underground workings of Twin Pines No. 2 Mine are located on the
eastern slope of what is known as the Chandler Syncline, with
exception of the first 2000 feet of the main entries, which cross
the western slope of the sycline. All of the mine workings on the
western slope are down-dip from the abandoned workings of the Last
Chance Mine, Cedar Canon Mine, and the original Twin Pines Mine.
Seepage was encountered in development of the main entries ad~a-
cent to the Last Chance workings. In development of the Second
East Section water was found empounded in the lower portions of
the abandoned workings of Cedar Canon and Twin Pines Mines. This
water was controlled through drill holes and pumped from the mine.
• After a period of the time the accumulated reservoir did receed.
Continued development of the main entries near the axis of the
Chandler Syncline have encountered seepage. This water is col-
lected and pumped from the mine as required. When the entries
have crossed the syncline, a permanent sump will be established.
Continued development of the mine will be on the eastern slope of
the syncline, down dip from the abandoned workings of Twin Pines
Mine.
Quarterly measurments of ground water levels in the monitoring
well TPW-1 do not indicate that the water table has receeded
during the period water has been pumped from the mine.
Water from the mine is pumped into the bench sediment pond,
which discharges into Lewis Gulch upstream of the gulch fill.
The discharge is monitored in accordance with the requirements
of the IQPEDS permit, issued by the Colorado Department of
Health. There has been no measurable flow at the point where
Lewis Gulch flows into Oak Creek. The quality of the mine water
has been within the limits setforth by the NPEDS permit.
Mine water conditions are monitored and reported inaccordance
with Stipulations No. 1 & 2, as revised by Technical Revision
no. 1.
• 94 (rev. S/17/89)
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