Laserfiche WebLink
Peabody <br />Twentymile Coal Company <br />29515 Routt County Road #27 <br />Oak Creek, CO 80467 <br />970.879.3800 <br />subsequently in compliance with applicable CDPS effluent limitations, or discharge to existing <br />transfer pipeline. <br />• (Action) Pump water from underground collection system near seals to surface via existing Ditch <br />D-2 and Mine Portal Sump <br />• (Action) Complete I ORT Dewatering Borehole No. 2 installation, including installation of pump <br />and pipeline connection to existing IORT waterline (MR08-228), which can feed to either the <br />Barricade Chamber/FCM-2 location or to the 6MN mine water storage and handling system <br />• (Action) Temporarily place coal fines slurry in existing permitted Area 1 Pit Coal Refuse Disposal <br />Area, and decant water to the Area 1 Pit <br />• (Modification) Install new 6" HDPE pipeline from Mine Portal Sump to Area 1 Pit (approximately <br />1,000') and transfer any overflow from Area 1 Pit to Pond D for discharge through permitted <br />Outfall 005. Pipeline will be installed across the Coal Storage Stockpile area and yard, and will <br />not require any new disturbance. <br />• (Modification) Install new 12" HDPE pipeline from Fish Creek water treatment facility to Area 1 <br />Pit (approximately 16,900'), allowing water to be transferred from the Fish Creek location (either <br />from treatment pond or new ventilation shaft pump installation) to the Area 1 Pit. Any overflow <br />from the Area 1 Pit could then be transferred to Pond D for discharge through permitted Outfall <br />005. Pipeline will be installed in existing pipeline and road corridors, and will not require any <br />new disturbance <br />• (Modification) Install new 12" HDPE pipeline from Barricade Chamber/FCM Well Casing to <br />connect with new Fish Creek pipeline (approximately 9,100') allowing water to be transferred <br />from the TORT Dewatering Boreholes to the Area 1 Pit, with transfer of any overflow from the <br />Area 1 Pit to Pond D for discharge through permitted Outfall 005. Pipeline will be installed in <br />existing pipeline and road corridors, and will not require any new disturbance <br />(Modification) Install new 12" HDPE pipeline from TORT valve installation to existing railroad <br />culvert for discharge to Foidel Creek through permitted Outfall 001 (General Permit for Coal <br />Mining Facilities (Permit No. COG-850000, Facility No. COG -850048). Pipeline installation <br />will involve approximately 3,600' of new disturbance <br />TCC anticipates that discharge from multiple sources may require water treatment to meet applicable <br />effluent standards. We are currently pursuing portable (skid or trailer-mounted) treatment systems that <br />could be brought-in and installed quickly to operate on a temporary basis to address current mine <br />dewatering needs, with the potential for conversion to a long-term treatment installation. It is anticipated <br />that longer-term water treatment will be necessary, and TCC is also pursuing and evaluating the available <br />options. For both immediate and future water treatment, TCC anticipates that any ground-disturbing <br />option will be addressed through a separate revision submittal(s). <br />G:\Environmental\REVISION\MINOR-RV\MR08-230 Mine Dewatering Modifications\MR08-230 Mine Dewatering <br />Modifications TL.doc