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PERMIT#:M-1977-300 <br /> INSPECTOR'S INITIALS:AME <br /> INSPECTION DATE:August 4,2020 <br /> ;ne water during 2020. <br /> Since the Division's last inspection of the site, the operator completed re-routing the sump lines from sumps# <br /> 4, 5, 8, 9, and 10 (per the operator's July 17, 2020 notice) to create a master sump at sump#1. This will allow <br /> the operation to safely excavate these sump areas while removing the surrounding contaminated soils down to <br /> bedrock. According to Mr. Ray, all sumps have been dry in recent months. Sump#1 is located downgradient of <br /> the mine site, near the southern extent of the anticipated excavation area. The Division observed a small amount <br /> of water present in Sump #1 during the inspection (measurements were not obtained),which appeared to be <br /> coming from the wetland study effluent line that was recently re-routed to this sump from sump#5. As of <br /> Technical Revision No. 27 (approved on January 17, 2019), any water collected in the sumps was being routed <br /> to the water treatment plant where an aggregate sample was collected for water quality analysis. Now, only <br /> water collected in sump #1 will be sampled and the results submitted with the quarterly water monitoring report. <br /> The alluvial excavation project was underway during the inspection. Current excavation activities are in the <br /> stretch of the valley between the Black Forest Mine portal and the sump#4 location (beneath the mesa with the <br /> water treatment plant). The operation is still on track to complete the excavation project by the end of this year. <br /> It should be noted, an Amendment application(AM-05) was submitted by the operator on July 24, 2020 to <br /> increase the permit area by 3.98 acres (to accommodate anticipated reclamation activities in the Black Forest <br /> Mine and NWRP) and to include disposal of contaminated alluvial soils into the Black Forest Mine. The AM-05 <br /> application was called incomplete. The Division will begin a technical review of AM-05 once all items required <br /> for the application to be considered complete for filing purposes have been submitted. <br /> �1 its last inspection report, sent to the operator on July 7, 2020, the Division required the operator to provide an <br /> ,timated timeline for submittal of the (conceptual site model) Amendment application required by SO-1 <br /> approval in 2018. The operator submitted this timeline on July 27, 2020, which estimates the required <br /> Amendment application will be submitted during the 3rd quarter of 2021. This will allow the operator time to <br /> analyze the results of the ongoing monitoring programs (i.e., quarterly surface water and groundwater <br /> monitoring, mine pool elevation and chemistry monitoring, in-situ treatment including a mine pool tracer test <br /> with two tracers, pilot-scale wetland and bioreactor study), and incorporate these analyses into the conceptual <br /> site model and final reclamation plan to be included in the Amendment application. <br /> This concludes the report. <br /> Any questions or comments regarding this inspection report should be forwarded to Amy Eschberger at the <br /> Colorado Division of Reclamation, Mining and Safety, 1313 Sherman Street, Room 215, Denver, CO 80203, via <br /> telephone at 303-866-3567, ext. 8129, or via email at amy.eschberger@state.co.us. <br /> Page 3 of 10 <br />