West River Watershed, Anne Arundel County, MD

Notice of Intent to Establish a TMDL for Sediments

Section 303(d) of the federal Clean Water Act (CWA) directs States 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, the State is required to establish a Total Maximum Daily Load (TMDL) of the specified substance(s) that the waterbody can receive without violating water quality standards, demonstrate that another program or action will achieve water quality standards, or demonstrate via the development of a Water Quality Analysis (WQA) that water quality standards for the specified substance(s) are currently being achieved.  The Maryland Department of the Environment (MDE) hereby gives notice of the public availability of a draft TMDL document for Sediment for West River Watershed (basin code 02131004).

The Maryland Department of the Environment (MDE) identified the waters of the West River watershed on the State’s 2016 Integrated Report as impaired by multiple pollutants including sediments, sulfates, and nutrients. The West River is associated with three assessment units in Maryland’s Integrated Report: a non-tidal 8-digit watershed (02131004) and two estuarine portions (West River Mesohaline and Rhode River Mesohaline Chesapeake Bay segments). For more details about these listings, please see the TMDL report being made available for public comment. A data solicitation for TSS/sediment was conducted by MDE in March 2018, and all readily available data have been considered.
The TMDL sets the maximum load limit for the impairing substance.  The TMDLs also reflect load allocations to point sources, nonpoint sources and a margin of safety that accounts for uncertainty in the procedures used to estimate the TMDLs.  Once established by the State, the TMDLs will be subject to approval by the U.S. EPA.  The approved TMDLs will support measures needed to attain water quality standards in the West River Watershed. 


A 30-day public comment period for the draft document will take place from November 9, 2018 to December 10, 2018. Copies of the draft document have been placed in the Edgewater Branch of the Anne Arundel County Public Library (AACPL), 25 Stepneys Lane, Edgewater, MD 21037 and the Deale Branch of the AACPL, 5940 Deale-Churchton Road, Deale MD 20751.  The draft document is also available on the Internet at web site http://www.mde.maryland.gov/TMDL or by contacting Ms. Melissa Chatham by mail at MDE/WSA, 1800 Washington Boulevard, Baltimore, MD 21230, or by telephone at 410-537-3937 (outside the Baltimore area, dial 1-800-633-6101 x3937).  Anyone wishing to review the draft documents and supporting information or needing technical information may contact Ms. Chatham during normal business hours.

Written comments concerning the draft document may be submitted to the Department on or before December 10, 2018 and should be sent to Ms. Chatham at the above address or emailed to melissa.chatham@maryland.gov.  All comments received during the comment period will be considered and the draft document may be revised accordingly prior to its submittal to EPA for approval.


Draft Total Maximum Daily Load of Sediment
in the Non-Tidal West River Watershed, Anne Arundel County, MD

Fact Sheet West_River_TSS_TMDL_fact_sheet.pdf (439KB)
Main Report West_River_Sed_TMDL_PN.pdf (1841KB)
Point Source Technical Memorandum West_River_Sed_TMDL_PS_TechMemo.pdf (31KB)
Nonpoint Source Technical Memorandum West_River_Sed_TMDL_NPS_TechMemo.pdf (26KB)

Additional Supporting Information

Biological Stressor Identification West River Watershed Report (452KB)

Biological Stressor Identification Methodology (459KB)

Nontidal Sediment TMDL Methodology Report (361KB)

Addendum to the Nontidal Sediment TMDL Methodology Report (23KB)