Laserfiche WebLink
Permit Number COG-0700000 <br />Facility Number: COG-073311 <br />Page 1 a <br />Colorado Discharge Permit System Regulations (Regulation No. 61) <br />CERTIFICATION <br />under <br />GENERAL PERMIT FOR CONSTRUCTION DEWATERING OPERATIONS (SIC No: 1629) <br />Category 07, Subcategory 2, General Permits, Current fee: $500 per year/ long term per CRS 25-8-502 <br />All correspondence relative to this facility should reference the specific facility number, COG-073311. <br />This certification specifically authorizes Twentymile Coal Company to discharge as described below and in accordance <br />with the General Permit for Construction Dewatering Operations. <br />Permittee Contact <br />Twentymile Coal Company Brian Watterson, Geologist <br />29515 Routt County Road 27 Phone: 970.870.2750, Cell: 970.846.9684 <br />Oak Creek, CO 80467 Email: bwatterson(a)Reabodyener .com <br />Site Name. Construction Activity. and Location <br />18 Left Pipeline Fish Creek Crossing-The project includes excavation of the creek bed for installation of underground mine <br />water pipeline. Fish Creek will be diverted around the construction area; however dewatering may be necessary to remove <br />base flow and any encountered groundwater. The project is located approximately % of a mile east of County Road 27 at <br />Fish Creek within Twentymile Park in Oak Creek, (Routt County) Colorado 80467. The discharge is located at <br />approximately, Latitude: 40°22' 13.8"N, Longitude: -107* 5' 52.8" W. <br />Discharge Point <br />Outfalls Descri tion Estimated Flow Rate <br />001A Dewatering will discharge to Fish Creek Ave: 898 GPM <br />Effluent Limitations <br />The discharges are to Fish Creek, within Segment 13b of the Yampa River Sub-basin, Upper Colorado River Basin, found <br />in the Classifications and Numeric Standards for the Upper Colorado River Basin (Regulation No. 33; last update <br />effective January 1, 2010). Segment 131b is Reviewable, and is classified for the following beneficial uses: Aquatic Life, <br />Class 1 Cold; Recreation Class E; and Agriculture. <br />Permit Limitations and Monitoring Requirements for Outfall(s) 001A <br /> Discharge Limitations <br />Parameter Maximum Concentrations Monitoring <br /> 30-Day 7-5ay Daily Max Frequency Sample Type <br /> Average Average . <br />-----------------------------------Applicable to all Discharges -------- <br />Flow, MGD Report NA Report Weekly Instantaneous or <br /> Continuous <br />To <br />tal Suspended Solids, <br />mg/I <br />30 <br />45 <br />NA <br />Weekly <br />Grab <br />Oil and Grease mg/1 <br />_ NA NA 10* Weekly Visual* <br />pH, <br /> <br />mumMinimum- <br />Max) <br /> <br />NA <br />t I <br /> <br />NA <br /> <br />6.5-9.0 <br /> <br />Weekly <br /> <br />In-situ <br />----- ---------- ---------------------- Dischar e Specific Parameters-------- -----•________?_____ <br />Total Dissolved Solids, <br />m I ** <br />NA <br />NA <br />Report <br />Monthly <br />Grab <br /> <br />q a voslvlr sneerr Is ooservea, a grao sample snau oe collected and analyzed for oil and grease. <br />* * The TDS limitation will normally apply to discharges in the Colorado River Basin. <br />ISSUED AND EFFECTIVE.• FEBRUARY 22.2010 EXPIRATION: NnVF.MRF.R ;n 71) 17