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•"? Permit Number COG-500000 <br />Facility Number COG-500182 <br />CDRMS Permit No. M-1980-120 <br />Page 1 <br />Colorado Discharge Permit System Regulations <br />CERTIFICATION <br />under <br />DISCHARGES ASSOCL4TED WITH SAND AND GRAVEL MINING AND PROCESSING OPERATIONS <br />(AND OTHER NONMETALLIC MINERALS EXCEPT FUEL) <br />Category 07, Subcategory IA, Current annual fee $270 (CRS 25-8-502) <br />This certification specifically authorizes Weld County Public Works to discharge in accordance with the <br />General Permit for Sand and Gravel Mining and Processing Operations (and other nonmetallic minerals except fuel). <br />All correspondence relative to this facility.should reference the specific facility number, COG-500182. <br />Permittee Contact <br />Weld County Public Works Greg Nelson, Mining Supervisor <br />P.O. Box 758 Phone: 970-356-4000 Ext 3750 <br />Greeley, CO 80632 <br />Phone: 970-304-6496 Fax: 970-304-6497 <br />Coverage Under This Renewal Permit <br />The Division has recently renewed this general permit. Permittees who have been covered under the previous general permit and <br />reapplied in a timely manner will automatically be covered under this renewal general permit without lapse in permit coverage. <br />Permit fees previously paid will also automatically be transferred to this renewal general permit. Permittees will need to comply <br />with the terms and conditions of the new permit beginning July 1, 2008. In the interim, the permittee shall comply with the terms <br />and conditions set in the previous certification. As before, only discharges to surface waters of the State are covered. The Colorado <br />Division of Reclamation, Mining, and Safety (CDRMS) has authority over discharges to ground water from sand and gravel mining <br />and processing operations. There have been several changes to the permit. Please see the rationale. <br />project Name, Activity and Location <br />Koenig Pit - The facility is located on WCR 20, approximately '/a mile west of WCR 25, south side of the road, near Fort Lupton <br />(Weld County), CO; Latitude: 40° 7.8" north, longitude: 104° 51.3' west. Construction sand and gravel is produced at this site. Only <br />ground water from the pit area is discharged from this site. <br />Outfalls - - -- - -` --?---- <br />-- -- <br />?- Estimated Flow Rate <br />Owj-qlls? ?_---- <br />The discharge from a settling area in the southwest comer of the site, prior to Avg.= 6.48 MGD <br />001A entering Meadow Island Ditch #1*, which flows to the South Platte River. <br />* All discharges must comply with the lawful requirements of federal agencies, municipalities, counties, drainage districts, and other local <br />agencies regarding any discharges to storm drains systems, conveyances, or other water courses under their jurisdiction <br />Effluent Parameters <br />The discharge goes to the South Platte River, within Segment 01a of the Middle South Platte River Sub-basin, South Platte River <br />Basin, found in the Classifications and Numeric Standards for the South Platte River Basin (Regulation No. 38; last update effective <br />March 1, 2008). Segment Ola is designated as Use Protected and is classified for the following beneficial uses: Aquatic Life, Class 2 <br />(Warm); Recreation, Class .l a; Water Supply; and Agriculture. <br />Effluent Limitations and Monitoring Requirements for Permit, Part LB.1.b.-Construction S&G <br />Limitations tilonitorinl- Sample <br />i <br />Parameter <br />311-Day -Dah Daily Rationale <br />I'rcgttencl- T171)" <br />Arm.` w?,, .tlae. <br />General Permit Requirements <br />Continuous / Recorder/ <br />Flow MGD Report NA Report Discharge Evaluation Instantaneous2 In-situ 2 <br />H, s .u. N/A NA 6.5-9.0 Water Quality Standards 2 Da s/Month Grab <br />Oil and Grease, M94 N/A NA 10 State Effluent Regulations 2 Days/Month Visual <br />Total Su ended Solids, m 1 30 45 NA State Effluent Regulations 2 Da s/Month Grab <br />ISSUED: JUNE 16 2008 EFFECTIVE: JULY 1 2008 EXPIRATION: JUNE 30 2013