1996-05-30_REVISION - M1977378 - Laserfiche WebLink

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Attachment LK Page LK-2 Permit No. CO-0044768 Identification of Lands Mine portals,mine shaft and waste dumps located near top of Red Mountain Pass,on the east side of Colorado Highway 550,San Juan County,Colorado. See attached location and site map. Latitude 37 degrees 54 minutes Longitude 107 degrees 43 minutes Identification of the Waters of the United States Potentially Impacted Headwaters of North Mineral Creek. Mineral Creek flows into the Animas River below Silverton Colorado. See attached map. 2)StteMao Attached 3)Stormwater Management Controls Prior to draining of the pond, the pH will be raised to minimize the metal content of the pond water. Downstream sediment catchments will be installed to minimize downstream effects during remediation. 4)Inspection and Record Keeping Procedtms The Manager or a member of the Technical Services Department will inspoct this project prior to and during remediation efforts on a regular basis.Quarterly reports and photographs will be sent to both the Colorado Water Quality Control Division and the Colorado Division of Minerals and Geology. Price to remediation efforts the area will be photographed and the photographs will be submitted with the first quarterly report.Reports for this project will include finalized engineering drawings, with estimates of operation, maintenance and replacement requirements for a passive bio mass treatment system. Once all reclamation activities included in the plan are complete,a final report will be submitted Monitorin¢ Monitoring points for this project will consist of upstream,downstream as well as flows from adits,seeps and dumps. Monitoring will start in 1996 and continue until two years after the project is completed. Monitoring for run on, runoff and waste isolation will occur four times yearly, and particularly once in high flow and twice in low flow. All samples taken will be analyzed for dissolved metals Zn,Fe,Al, Mn,Cd,and Cu: total sulfate,hardness and a field pl-I will be taken as well as field measurements for flow.All monitoring results%gill be submitted by the 28th day of the month following receipt of analytical results as well as included in the quarterly reports. 5)Mine Remediation Plan Legal Right to Enter and Conduct Activities SGC has verbally discussed Qus concept in general terms with the property owner. No work will commence until an acceptable access agreement is reached.