Upper Chester River Watershed, Kent and Queen Anne's Counties, 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 Upper Chester River Watershed (basin code 02130510).

The Maryland Department of the Environment (MDE) identified the waters of the Upper Chester River watershed and associated assessment units on the State’s 2016 Integrated Report as impaired by multiple pollutants including sediment.  The upstream Delaware Chester River is not listed by Delaware as impaired by sediment, but is prescribed sediment reductions in this TMDL at the State boundary in order to meet the Maryland TMDL. A data solicitation for sediment was conducted by MDE in March 2018, and all readily available data has 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 Upper Chester River Watershed.


A 30-day public comment period for the draft document will take place from November 1, 2018 to December 3, 2018. Copies of the draft document have been placed in the North County Branch of the Kent County Public Library (KCPL) – North County Branch, 111-B1N. Main Street, Galena, MD 21635 and KCPL – Chestertown Branch, 408 High Street, Chestertown, MD 21620.  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 3, 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 Upper Chester River Watershed,
Kent and Queen Anne's Counties, MD

Fact Sheet Upper-Chester_TSS_TMDL_fact_sheet.pdf (468KB)
Main Report Upper-Chester-Sed_TMDL_PN.pdf (2170KB)
Point Source Technical Memorandum Upper-Chester-Sed_TMDL_PS_TechMemo.pdf (32KB)
Nonpoint Source Technical Memorandum Upper-Chester-Sed_TMDL_NPS_TechMemo.pdf (27KB)

Additional Supporting Information

Biological Stressor Identification Upper Chester River Watershed Report (466KB)

Biological Stressor Identification Methodology (459KB)

Nontidal Sediment TMDL Methodology Report (361KB)

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