City of Knoxville

TOTAL MAXIMUM DAILY LOADS (TMDLs)

Civil Engineering Section
Stormwater Engineering Section
Traffic Engineering Section

NPDES

NPDES Program Overview
NPDES Reports
Sanitary Sewer Overflows
Stormwater Quality Brochures

City of Knoxville
Water Quality Hotline
865-215-4147

TMDLs

TDEC, in accordance with mandates from the U.S. Environmental Protection Agency, has made comprehensive lists of polluted streams and rivers with the state of Tennessee. The 303(d) list is compiled using the HUC designation given to watersheds by the United States Geological Survey. The 303(d) lists for every state are updated periodically as more information becomes available. The individual cities and counties are required to be very proactive in addressing the cited types of pollution. See the TDEC Web site for the current 303(d) list and for additional information about TMDLs. Streams may be added to the list, or even removed if the pollution reduction goals have been met. The proposed final version of the 2002 303(d) list has been prepared by TDEC for public comment and review.

TDEC has authorized pollution reduction goals for various streams across the state of Tennessee, based upon modeling the specific pollutants to determine a total maximum daily load (TMDL). Water quality models are developed and then calibrated using existing data such as average flow discharge or water quality. The initial wave of TMDL studies modeled for the Knoxville creeks and streams in 2001 are for fecal coliform pollution. Additional pollutants (sediment, heavy metals, nutrients) will be modeled in future years. Since the City of Knoxville must meet TMDL goals and targets for each listed creek and stream, additional measures for pollution reduction may be required above and beyond the first flush criteria used in stormwater detention.

Links to TMDL information:

Website:	Topics:
USEPA	Introduction to TMDLs
USEPA	Overview of TMDL Legislation
USEPA	TMDL Reports and Statistics
TDEC	Introduction, Definitions, Management and Current List of TMDLs
TDEC	Posted Streams and Lakes (Bacteria Advisory & Contaminated Fish) (see Chapter IX)

See the TDEC website for the final approved TMDL reports issued for the following Knoxville watersheds:

TMDL Report for Fecal Coliform: First Creek, Second Creek, Third Creek, and Goose Creek. (Fort Loudoun Watershed - HUC 06010201)

TMDL Report for Fecal Coliform: Baker Creek, Fourth Creek, and Williams Creek. (Fort Loudoun Watershed - HUC 06010201)