Final TMDLs Approved by EPA: Wills Creek

Wills Creek is located in Allegany County and flows south from its headwaters in Pennsylvania to its confluence with the North Branch Potomac River at Cumberland, MD. Jennings Run and Braddock Run are the two main tributaries to Wills Creek, draining western Allegany County and a small portion of northeastern Garrett County. The drainage area of Wills Creek totals 160,500 acres, with 38,500 acres in Maryland and 122,000 acres in Pennsylvania.  

The Maryland Department of the Environment (MDE) has identified the waters of Wills Creek (basin number 02141003) on the State’s 303(d) List submitted to the EPA by MDE as impaired by nutrients (1996), sediments (1996), pH (1998 and 2004), bacteria (2002), toxics - Cyanide (1996), and portions of the basin for impacts to biological communities (2002). The designated use of Wills Creek is Use IV-P (Recreational Trout Waters and Public Water Supply) for the mainstem only and Use I (Water Contact Recreation and Protection of Aquatic Life) for all other tributaries. The document available below establishes a TMDL of sediment in Wills Creek to allow for the attainment of the above mentioned designated uses. The objective of the sediment TMDL established in this document is to ensure that there will be no sediment impacts affecting aquatic health, when aquatic health is evaluated based on Maryland’s biocriteria, thereby establishing a sediment load that supports the Use I/IV-P designation for the Wills Creek watershed. The watershed sediment load includes the potential effects of water clarity and erosional and depositional impacts, thus accounting for all of the sediment impacts that indicate a sediment impairment per the Maryland 303(d) listing methodology.

A Water Quality Analysis (WQA) for low pH was approved by the EPA (2005). Also, a WQA of Cyanide and a TMDL to address the bacteria listing were submitted to the EPA (2005 and 2006, respectively). The listings for nutrients and impacts to biological communities will be addressed separately at a future date.

Note: Following the approval of the TMDL, a typographical error was discovered in Table B-3. Specifically, the 0.0152 ton/yr value reported in the table as the individual wasteload allocation (WLA) for the Stoner Quality Water, Inc. industrial process water discharge facility (NPDES Permit # MD0020818) should have been reported as 0.061 ton/yr. The document available for download below contains the corrected version of this table. All other allocations and values within the report are correct, and this change in allocation to the facility merely represents a typographical error that did not cause revisions to the overall TMDL or any of the other allocations or values included in the analysis. The revised final version of the document containing the corrected typographical error is available for download below. 

Total Maximum Daily Load of Sediment in the Wills Creek Watershed, Garrett and Allegany Counties, Maryland

(Approved on January 16, 2007)

EPA's Decision Letter EPA's Decision Letter
Revised Final Report TMDL_Wills Creek_revised final.pdf (1,014 KB)
Final Report TMDL Wills Creek final.pdf  (1,014 KB)

Comment Response Document

CRD_willscreek_sed.pdf (8KB)

Contact Information

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