PERMFILE55703 - Laserfiche WebLink

Home Browse Search

Species PLS lbs./acre . Intermediate wheatgrass 2.0 Slender wheatgrass 2.0 • -Pubescent wheatgrass 2.0 Desert Wheatgrass 1.5 ~ Regar meadow brome 0.5 - Lincoln smooth brome 1.0 Orchazdgrass 0.5 Timothy 0.5 Alfalfa 0.25 Cicer milkvetch 0.25 10.5 Coordinates of the borehole are established by survey or GPS and recorded for location purposes. Finally, an abandonment report is prepared, with copies submitted to the CDMG. Monitoring and Water-Suonly Wells and Utility $oreholes In general, groundwater monitoring wells are retained and monitored until it is determined that monitoring is no longer necessary. Sitr~ilarly, utility boreholes are retained until they are no longer needed. At that time, groundwater monitoring wells and utility boreholes are reclaimed in essentially the same manner as previously described for exploration boreholes. The primary differences in reclamation requirements for monitoring wells/utility boreholes versus exploration boreholes are that monitoring wells/utility boreholes may require a bottom plug to facilitate proper sealing and much of the surface reclamation (ie: site grading, topsoiling, and seeding) for monitoring wells/utility boreholes has already been completed, since these sites are stabilized at the time the well borehole is completed. Typically, an inflatable packer, spider, or other plug is used as the base for the grout column to properly seal monitoring wells/utility boreholes. Perforation of the well casing is not necessary since casings are normally grouted in-place during well construction. Final reclamation of these sites (ie: plugging • and sealing) may result in minor re-disturbance, but does not typically require full reclamation. Because alluvial monitoring wells are relatively shallow wells completed in unconsolidated alluvium/colluvium, which do not penetrate other potential water-bearing units, well abandonment is simplified. Typically, well abandonment for shallow alluvial wells involves either pulling or cutting the well casing off at least a foot below grade, backfilling the well bore with native soil materials, and placing a permanent marker to identify the former well location. Any associated surface disturbance is then reclaimed in the manner previously described. Water-supply wells are a valuable asset that is typically retained to support postmining land uses. If this is not the case, they are also plugged, sealed, and reclaimed, as previously described. (h) A description of steps to be taken to comely with the reauirements of the Clean Air Act (42 U.S.C. Sec. 7401 et seg.), the Clean Water Act (33 U.S.C. Sec. 1252 et sea.). and other annlicable air and water auality laws and regulations and health and safety standards, or a copv of an approved permit or application for a permit. RESPONSE TCC will continue to operate in accordance with air quality emission pemuts issued by CDPHE-APCD. Fugitive dust control measures are employed as an integral part of the mining and reclamation operations. Compliance with the air quality permits serves to effect compliance with the Federal Clean Air Act and the Colorado Air Quality Control Act. Air pollution control measures are discussed in greater detail under Rule 2.05.6(1), and a copy of the Air Qualify Emission Permits issued for the Foide] Creek Mine are presented in Exhibit 29, Emission Permits. • TCC will abide by the requirements of National Pollutant Discharge Elimination System (NPDES) Permit CO- 0027154 issued by CDPHE-WQCD. Twentymile Coal Company is responsible for NPDES Permits No. CO- 0036684 and CO-0042161. Permit No. CO-0036684 establishes the effluent limitations for the Fish Creek Tipple. TROS-51 2.05-121 03/13/06