Coal Basin History; Geology, Mining, Reclamation. You have to know the past to understand the future - Carl Sagan
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1 Coal Basin History; Geology, Mining, Reclamation You have to know the past to understand the future - Carl Sagan
2 Geology and Coal Basin Mancos Shale; Cretaceous deep ocean, fine grained sediment; Welcome to planet Earth, a wonderful but not entirely stable place to live." -Craig Childs MesaVerde Formation Late Cretaceous intercoastal and near coast inter-bedded coal, sandstone shale development Nearby Elk Mountains mountain building pushes sediments upwards
3 Geology and Coal Basin -Following mountain building episodes, erosion and mass wasting become dominant land-forming processes in Coal Basin. Dutch Creek debris flows Incised creeks Physical geography and geology are inseparable scientific twins. Sir Roderick Murchison, 1857 Sediment laden runoff
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9 Coal Basin History Late 1800 s John Osgood develops Coal Basin Mine Located near headwaters of Coal Creek Coal Basin Mine operates until about 1908 Rail and town site remnants still visible Coal refuse located in and adjacent to Coal Creek floodplain
10 Coal Basin History 1956 Mid Continent Coal and Coke Company begins operations; Underground mining and coal cleaning operations; Five underground mines developed over span of about 10 years; Operations cease in 1991
11 Coal Basin History Each mine built at about 10,000 elevation; Each mine had about 4 entries and fan entries; Entry areas (face-up) developed by excavating mountain to create highwalls; waste downcast over slope; Coal mined by room and pillar and longwall methods;
12 Coal Basin History Coal hauled from entries to preparation plant for cleaning; Need for facilities space and coal refuse deposition results in channelization of Dutch Creek; About 15 miles of haul roads; Over-the-road hauling substantially replaced by Rock Tunnel beltline system in mid- 80 s;
13 Coal Basin History Continued coal cleaning requires construction of (second large) Sutey Coal Refuse Disposal Facility; Mine makes water. In later years mine water discharged at Rock Tunnel entry to treatment ponds;
14 Coal Basin History 1977 Federal Surface Mining Control and Reclamation Act (SMCRA) enacted; State Primacy; About 1984 Mid-Continent Resources issued a permit by Colorado; Numerous operational and environmental issues; Numerous citizen complaints
15 Coal Basin History From late 80 s through 1993, lots of Federal / State / Company / Local Public Interest Group jostling to resolve site issues. A story unto itself, the upshot is:
16 Coal Basin History MCR files bankruptcy in February, 1992; The operating permit is revoked in August, 1992, MCR ordered to complete reclamation; Reclamation bond is forfeit by Colorado in September, 1993; First of a number of lawsuits between State and MCR initiates in September, 1993; State begins reclamation work in 1994.
17 Coal Basin Environmental History Environmental Issues Driving Reclamation Sedimentation from Mining Related Facilities Road System Facilities Area (Confluence Coal and Dutch Creeks) Mine Bench Outslopes Coal Basin Town Refuse
18 Coal Basin Environmental History Environmental Issues Driving Reclamation Contaminants Underground Storage Tanks Diesel Stained Soils; Old Refuse Pile Instability (Confluence Coal and Dutch Creeks); Dutch Creek Diversion Instability
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23 Coal Basin Environmental History Road Reclamation
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36 Coal Basin Environmental History Mine Entry Area Reclamation
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43 Coal Basin Environmental History Mine Bench Outslope Reclamation
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67 Coal Basin Environmental History Facilities Area and Dutch Creek Diversion Reclamation
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80 Coal Basin Environmental History Refuse Pile and Other Sediment Control Reclamation Projects
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100 Reclamation Funding Primary Reclamation Funding Reclamation $2.5 Million Work in Lieu of $500,000 $3,000,000 Supplemental Funding OSM Civil Penalty Grant (Dutch Creek $110,000; AML Fund (Old Refuse $437,000; AML Fund (Coal Basin Town Refuse $135,000; CWA (319) Fund $196,000; USFS, WRNF $50,000; Colo. Dept. Ag (Weed $ 6,000 $934,000
101 Coal Basin Environmental History My Soap Box (What I ve Learned): Understand the Environment at Coal Basin and Work With its Unique Character; Exceptionally Dynamic and Mobile System; Graze Only After Substantial Maturity and Diversity Established;
102 Coal Basin Environmental History My Soap Box (What I ve Learned), Cont d: Build Micro Climates; Disperse Water at Every Opportunity; Soils and Remnant Refuse Respond to Addition of Organic Matter;
Geologic Setting and History of Mining in the Animas River Watershed, southern Colorado
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