Final TMDLs Approved by EPA: Big Piney Reservoir

Big Piney Reservoir is an impoundment located in northeastern Garrett County, Maryland.  The impoundment, which is owned by the City of Frostburg, lies on Big Piney Run.  The dam was constructed in 1990. Inflow to the Lake is primarily via Big Piney Run. 

Big Piney Reservoir was identified on the State of Maryland’s 2002 list of Water Quality Limited Segments [303(d) list] as impaired by mercury contamination, based on data for mercury concentrations in fish tissue.  Concentrations in the water are well below the threshold for concern in regard to drinking water.  The Maryland water quality standards Surface Water Use Designation [Code of Maryland Regulations (COMAR] for Big Piney Reservoir is Use III-P – Natural Trout Waters and Public Water Supply.  The Maryland Department of the Environment’s (MDE) current public fish consumption advisory to eat limited amounts of fish from Big Piney Reservoir is not supportive of the recreational fishing use.  Therefore, the document available below establishes a Total Maximum Daily Load (TMDL) for mercury in Big Piney Reservoir.


TMDL of Mercury for Big Piney Reservoir, Garrett County, Maryland

(Approved on February 18, 2004)

EPA's Decision Letter

EPA's Decision Letter

Main Report


Comment Response Document



Contact Information

Please direct questions or comments concerning this project to Maryland's TMDL Program at (410) 537-3818.