Total Maximum Daily Loads of Fecal Bacteria for the Lower Monocacy River Basin in Carroll, Frederick, and Montgomery Counties, Maryland

Final TMDLs Approved by EPA: Lower Monocacy River

The Lower Monocacy River watershed is located in Frederick, Carroll, and Montgomery Counties in Maryland (MD). The total drainage area of the Lower Monocacy River is approximately 314.2 square miles (201,104 acres). The city of Frederick, MD and several towns including Walkersville, Woodsboro, and Mount Airy are located in the basin. The Lower Monocacy River flows southward through Frederick, eventually emptying into the Middle Potomac River near the town of Dickerson.The Lower Monocacy River watershed is located in Frederick, Carroll, and Montgomery Counties in Maryland (MD). The total drainage area of the Lower Monocacy River is approximately 314.2 square miles (201,104 acres). The city of Frederick, MD and several towns including Walkersville, Woodsboro, and Mount Airy are located in the basin. The Lower Monocacy River flows southward through Frederick, eventually emptying into the Middle Potomac River near the town of Dickerson.

There are several major tributaries comprising the Lower Monocacy River watershed: Israel Creek, Carroll Creek, Linganore Creek, Bush Creek, Bennett Creek, and Ballenger Creek. These branches are free-flowing (non-tidal) streams, and flow directly into the Lower Monocacy River.

The Maryland Department of the Environment (MDE) has identified the Lower Monocacy River on the State of Maryland's 303(d) List as impaired by the following (years listed in parentheses): fecal coliform (2002), nutrients (1996), sediments (1996) and impacts to biological communities (2002, 2004, and 2006). Lake Linganore, an impoundment within the Lower Monocacy River basin, was listed for nutrients and sediments in 1996. The Lower Monocacy River, upstream of US Route-40, and its tributary Israel Creek have been designated as Use IV-P waterbodies (Recreational Trout Waters and Public Water Supply). Downstream of Route US-40, the Lower Monocacy River is designated as a Use I-P waterbody (Water Contact Recreation, Protection of Aquatic Life and Public Water Supply). Additional tributaries of the Lower Monocacy River--Carroll Creek, Rocky Fountain Run, Little Bennett Creek, Furnace Branch, Ballenger Creek and Bear Branch--are designated as Use III-P waterbodies (Nontidal Cold Water and Public Water Supply). See Code of Maryland Regulations (COMAR) 26.08.02.08P. The document available below establishes a TMDL for fecal bacteria in the Lower Monocacy River that will allow for attainment of the beneficial use designation of primary contact recreation. The listings for nutrients, sediments, and impacts to biological communities will be addressed separately at a future date. Phosphorus and sediment TMDLs for Lake Linganore were approved by EPA on March 13, 2003 to address the nutrient and sediment listings. A data solicitation for fecal bacteria was conducted by MDE in 2003, and all readily available data from the past five years were considered.

 

Total Maximum Daily Loads of Fecal Bacteria for the Lower Monocacy River in Frederick, Carroll, and Montgomery Counties, Maryland

(Approved on December 3, 2009)

EPA's Decision Letter

EPA's Decision Letter

Main Report

Lower_Monocacy_Bacteria_TMDL_Final.pdf (2,540KB)

Comment Response Document

Lower_Monocacy_Bacteria_CRD_Final.pdf (27KB)

 

Contact Information

Please direct questions or comments concerning this project to Maryland's TMDL Program at (410) 537-3572.