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California Gulch NRDAR Dinero Tunnel Acid-Mine Drainage Pathway Elimination Restoration

Dates

Start Date
2006
End Date
2014

Summary

Background information. The Dinero Tunnel, which extends approximately 3,000 feet from the surface to the Dinero Shaft, was used in the late 1800s to mine primarily for silver. In more recent years, the tunnel, located approximately five miles west of Leadville, Colorado, began to discharge acid mine drainage into Sugarloaf Gulch, a tributary to the Lake Fork River which ultimately drains into the upper Arkansas River. Consequently, acid mine drainage from the Dinero Tunnel has significantly affected downstream waters, including a wet meadow and beaver pond complex. Occasionally, the Dinero Tunnel experienced blowouts that developed when temporary pressure would build up behind a blockage in the tunnel, which would then expel sludge [...]

Contacts

Project Extension

parts
typeRestoration Type
valueAcid mine drainage abatement
typeTotal Project Expenditures (2014 dollars)
value$1,294,000
typeJob-Years
value24.3 (18.8 per $1M)
typeLabor Income (2014 dollars)
value$1,472,000 ($1.1M per $1M)
typeValue Added (2014 dollars)
value$1,988,000 ($1.5M per $1M)
typeEconomic Output (2014 dollars)
value$3,767,000 ($2.9M per $1M)
typePercent of Expenditures Spent Locally
value9%
typeLocal Project Expenditures (2014 dollars)
value$118,000
typeLocal Job-Years
value2.0
typeLocal Labor Income (2014 dollars)
value$117,000
typeLocal Value Added (2014 dollars)
value$127,000
typeLocal Economic Output (2014 dollars)
value$206,000
typeEconomy Extent
valueNational Economic Impacts

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