Deep Creek Lake is an impoundment located near McHenry in Garrett County, Maryland. Deep Creek Lake was created in 1925 when the Youghiogheny Hydroelectric Company constructed a dam across Deep Creek. Today, the lake is owned by the State of Maryland. The lake receives inflow from several tributaries, including Cherry Creek, Meadow Mountain Run, North Glade Run, Green Glade Run, Pawn Run, and Red Run.
Deep Creek Lake was identified on the State of Maryland’s draft 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 26.08.02.07)] for Deep Creek Lake 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 Deep Creek Lake is not supportive of the recreational fishing use. Therefore, the document, available below, establishes a Total Maximum Daily Load (TMDL) for mercury in Deep Creek Lake.
EPA's Decision Letter
Comment Response Document
Please direct questions or comments concerning this project to Maryland's TMDL Program at (410) 537-3818.
1800 Washington Boulevard, Baltimore, MD 21230