This document, upon approval by the U.S. Environmental Protection Agency (EPA), establishes a Total Maximum Daily Load (TMDL) for bacteria in Marley Creek and Furnace Creek within the Baltimore Harbor watershed (MD basin number 02130903, AU-IDs: MD-PATMHFURNACE- CREEK and MD-PATMH-MARLEY-CREEK). Section 303(d) of the federal Clean Water Act (CWA) and the EPA's implementing regulations direct each state to identify and list waters, known as water quality limited segments (WQLSs), in which current required controls of a specified substance are inadequate to achieve water quality standards. For each WQLS, states are required to either establish a TMDL of the specified substance that the waterbody can receive without violating water quality standards or demonstrate that water quality standards are being met. Marley Creek and Furnace Creek are located in Anne Arundel County. They are designated as Use I: Water Contact Recreation and Protection of Nontidal Warmwater Aquatic Life (COMAR 26.08.02.02). Marley Creek and Furnace Creek were first identified on the 1998 303(d) List submitted to EPA by the Maryland Department of the Environment (MDE). The designated use in the creeks were listed as impaired by elevated levels of bacteria. In the 2008 Integrated Report of Surface Water Quality (MDE 2008), the bacteria impairment (enterococci) was clarified for these creeks. The designated uses in Baltimore Harbor were listed as impaired by sediments (1996), nutrients (1996), bacteria (1998), polychlorinated biphenyls (PCBs, 1998), various metals (1998), impacts to biological communities (2002) and debris/floatables/trash (2008). This document, upon EPA approval, establishes a TMDL for enterococci bacteria in Marley Creek and Furnace Creek, which will allow for the attainment of their designated use. A TMDL was completed for the nutrient listing in 2007.