Unexpected hydrologic perturbation in an abandoned underground coal mine: Response to surface reclamation?

Harper, Denver; Olyphant, Greg A.; Hartke, Edwin J.

doi:10.1007/bf01706409

Cited by 1 publication

(2 citation statements)

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“…Water levels in many mine aquifers are highly responsive to seasonal and short term (storm period) variations in precipitation (Harper and Olyphant, 1992, 1993, 1996 indicating that these systems are generally in good connection with the surface. The one exception, in our experience, is the BHS where water levels have remained fairly steady after an initial ( delayed) excursion that was probably associated with infilling of a refuse pit following reclamation (Harper et al, 1990). …”

Section: Hydrogeologic Conditionsmentioning

confidence: 60%

“…1980; Brooks et al, 1991;Cable et al, 1971;Harper et al, 1990, Wangsness et al, 1981 we have studied, highly concentrated acidic water which originated through weathering in the vadose zones of coarse and fine grained (pyritic) refuse deposits emerges as seepages and springs at the bases of the deposits (where a permeability boundary exists) or as subsurface flow into erosion gullies during rainstorms. At the FTS, two monitoring wells in loess and till just 10 m beyond the edge of a refuse pile contained water with no evidence of acidic contamination.…”

Section: Hydrogeologic Conditionsmentioning

confidence: 99%

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Hydrologic Conditions in the Coal Mining District of Indiana and Implications for Reclamation of Abandoned Mine Lands

Olyphant¹,

Harper²

1998

ASMR

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Abstract. Bedrock strata of the mining district of Indiana (Indiana Coal Mining District, ICMD) include numerous coalbeds of economic importance, together with underclays, roof shales, limestones, and sandstones of Pennsylvanian age. These are typically poor aquifers with low hydranlic conductivities and specific yields. Surficial materials include loess, till, alluvium, and other deposits of Pleistocene age. The loess and till also have low hydranlic conductivities, so that very few shallow aquifers exist in the vicinities of abandoned mine land (AML) sites, except where they are close to the alluvial fill oflarge bedrock valleys. The hydrologic cascade at AML sites in Indiana is strongly conditioned by the existence of elevated deposits of coarse-grained coalpreparation refuse and flooded underground mine workings. Flooded mines are the principal conduits of groundwater flow in the area, but their boundaries, flowpaths, and mechanisms of recharge and discharge are very different from those of natural aquifers and are poorly understood. Acidic mine drainage often emerges as seepages and springs on the edges of the elevated refuse deposits, but the low permeability of the natural surficial materials and bedrock inhibits the development of off-site groundwater contaminant plumes. The water balance across the surf.ace of the refuse deposits is critical to reclamation planning and success.

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Section: Hydrogeologic Conditionsmentioning

confidence: 60%

Section: Hydrogeologic Conditionsmentioning

confidence: 99%