Final TMDLs Accepted as Information to Delist: Georges Creek

Georges Creek is a tributary of the North Branch Potomac River, located in Allegany County, Maryland.  The mainstem of Georges Creek is approximately 15 miles long. The watershed of Georges Creek has an area of approximately 47,693 acres.

Georges Creek was identified on Maryland’s 1996 list of Water Quality Limited Segments (WQLSs) due to excess nutrients and suspended sediment, and on the 1998 Additions to the 303(d) list for low pH; however, recent data showed neither a nutrient nor dissolved oxygen impairment. Despite the presence of other impairing substances, this data indicates that the dissolved oxygen characteristics of Georges Creek are significantly better than the water quality standards established for this water body and these characteristics should be maintained under Code of Maryland Regulations (COMAR) § The Department is considering whether Georges Creek will be designated as a Tier II waterbody for dissolved oxygen pursuant to Maryland’s Antidegradation Policy (COMAR § If Tier II designation is pursued, a more stringent review will be required before biochemical oxygen demand (BOD) loadings are allowed to increase. Reductions in ambient dissolved oxygen (DO) could occur in the future with increases in carbonaceous biological oxygen demand (CBOD) and nitrogenous biochemical oxygen demand (NBOD).  Therefore, based on the available data, Maryland Department of the Environment (MDE) concluded that CBOD and NBOD are the principal threat to water quality in Georges Creek. The report available below documents the establishment of TMDLs for Georges Creek to maintain present and future dissolved oxygen concentrations. MDE believes that these CBOD and NBOD TMDLs will completely address the original 303(d) listing for nutrients.  A sediment TMDL was completed in 2006.  The pH impairment will be addressed in separate TMDL documents.

Total Maximum Daily Load (TMDL) for
Biochemical Oxygen Demand (BOD) to Georges Creek in
Allegany and Garrett Counties, Maryland

(Approved on February 6, 2002)

EPA's Decision Letter EPA's Decision Letter
Main Report geocrk_main_final.pdf (1416 KB)
Appendix A geocrk_appxa_final.pdf (1438 KB)
Nonpoint Source Technical Memorandum geocrk_techmemo_final.pdf (121 KB)
Comment Response Document geocrk_crd_final.pdf (93 kb)


Contact Information

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