Laserfiche WebLink
have a Sediment Control Plan approved by the Colorado Division of Reclamation, Mining <br />and Safety. No other monitoring or limitations are applied. This specification is noted on <br />revised Table 18 -1. The operator's CDPS permit includes one active dewatering point <br />( Outfall 016) and one back -up point ( Outfall 002). Mine water discharge volume is <br />measured by flow meter. Water quality of the mine discharge water will be tested are ma yfcr <br />parameters listed in Table 18 -2. CDPS monitoring parameters and frequencies for mine <br />dewatering sites are listed in Table 18 -1. Whole effluent toxicity testing was conducted quarterly <br />at these sites until 2005 when, through an amendment process, the CDPHE determined that <br />termination of WET testing at these sites was allowable. Former Site 015 at the 2 -West <br />Portals is inactive, and was never used. The 2 West Portals have now been sealed. Discharge <br />Site 001 at the South Portals has been fully reclaimed, and Discharge Site 004 at the North <br />Portals has been inactivated, and the North Portals have been sealed and backfilled. Ponds 1 <br />and 2, Outfalls 009 and 010, have been fully r eclaimed and have received Phase I, II and III <br />Bond Release with SL -7 on April 26, 2011. Outfalls 001, 004, 009, 010 and 015 are no <br />longer included in operator's CDPS permit. <br />Flow volume will be monitored at flume installations on Rapid Creek and Cottonwood <br />Creek at the following locations; SWGS -02 -- located on Cottonwood Creek in the NE 1/4 <br />SE 1/4 Section 12, immediately upstream of No. 3 South Mains, SWGS -03 -- located on <br />Rapid Creek in the SE 1/4 NE 1/4 Section 7, and SWGS -01 -- positioned on Rapid Creek <br />downstream of the confluence with Cottonwood Creek. Flow at SWGS -02 and SWGS -03 <br />will be recorded bimonthly during low flow (June through November). Flow <br />measurements on SWGS -01 will be collected with continuous flow recorder when the <br />reek is not frozen. <br />Monitoring of Coal Creek and Jerry Creek was initiated in 1995. In 1999, monitoring <br />requirements were reduced to downstream stations SWGS -06 on Coal Creek and SWGS - <br />on Jerry Creek. The ephemeral flow in Coal Canyon will be monitored at the "dip section" <br />culverts located between CRDA -1 and CRDA -2. The intermittent flow of Jerry Creekwas <br />measured at a culvert near the Highline Canal, a short distance upstream from the creek's <br />confluence with the Colorado River. Instantaneous flow will be measured quarterly at the <br />culverts, for which flow ratings have been provided. Monitoring of Jerry Creek, SWGS -08, <br />was discontinued in September 2011 with the approval of TR -62. <br />G. Transfer of Wells <br />Information on the final disposition of monitoring wells and other pertinent data is found in <br />the permit application beginning on page 14 -29. All mine openings and wells will be <br />permanently closed using permit specified measures, with the exception of approved <br />permanent dewatering pipes. The operator projects no discharge from the Roadside North <br />Mine following permanent sealing. At the Roadside South Mine, water will be allowed to fill <br />abandoned areas to an elevation below the level of the sealed Northwest intake portal. <br />Approved permanent discharge structures are located at Outfall 016, a gravity flow discharge <br />pipe located near the North Decline reclaimed area, and Outfall 002, a siphon type discharge <br />structure located at the backfilled Northwest Intake Portal. Outfall 016 is the primary <br />discharge site; Outfall 002 is approved as a back -up system for use in the event that Site 016 <br />malfunctions. <br />27 <br />