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TMDL Document for TMDL FOR SILTATION AND HABITAT ALTERATION IN THE LOWER CLINCH RIVER WATERSHED (HUC 06010207)

TMDL ID: 22756 TMDL Name: TMDL FOR SILTATION AND HABITAT ALTERATION IN THE LOWER CLINCH RIVER WATERSHED (HUC 06010207)
State/Tribe: Tennessee TMDL Date: 03/29/2006
EPA Action: EPA Approved

TMDL Documents

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Document Type Comments
TMDL Document  

TMDL Pollutant: Siltation

Total Waste Load Allocation:      Total Load Allocation:
Explicit Margin Of Safety:      Implicit Margin Of Safety: Y
Units for Total Waste Load Allocation and Total Load Allocation:      TMDL Pollutant Source Type: Point/Nonpoint Source
TMDL End Point: THE TMDL DEVELOPMENT GENERAL ANALYSIS METHODOLOGY INCLUDES AN ANALYSIS PERFORMED USING THE WATERSHED CHARACTERIZATION SYSTEM SEDIMENT TOOL (BASED ON UNIVERSAL SOIL LOSS EQUATION) APPLIED TO IMPAIRED HUC-12 SUBWATERSHED AREAS TO CALCULATE EXISTING SEDIMENT LOADS. THE TARGET SEDIMENT LOADS (LBS/ACRE/YEAR) ARE BASED ON THE AVERAGE ANNUAL SEDIMENT LOADS FROM BIOLOGICALLY HEALTHY WATERSHEDS (LEVEL IV ECOREGION REFERENCE SITES). THE TMDLS ARE EXPRESSED AS THE PERCENT REDUCTION IN AVERAGE ANNUAL SEDIMENT LOAD REQUIRED FOR A SUBWATERSHED CONTAINING IMPAIRED WATERBODIES RELATIVE TO THE APPROPRIATE TARGET LOAD. 5% OF SUBWATERSHED TARGET LOADS ARE RESERVED TO ACCOUNT FOR WLAS FOR INDUSTRIAL FACILITIES, READY MIXED CONCRETE FACILITIES (RMCFS), AND REGULATED MINING SITES. THE LOADING FROM THESE SOURCES IS SMALL COMPARED TO TOTAL LOADING. SINCE THE TSS OF MUNICIPAL STP DISCHARGES IS GENERALLY COMPOSED OF PRIMARILY ORGANIC MATERIAL AND IS CONSIDERED TO BE DIFFERENT IN NATURE THAN THE SEDIMENTS PRODUCED FORM EROSIONAL PROCESSES, TSS DISCHARGES FROM STPS WERE NOT CONSIDERED IN THE TMDL ANALYSIS. WLAS FOR THE USDOE OAK RIDGE Y-12 NATIONAL SECURITY COMPLEX, MUNICIPAL SEPARATE STORM SEWER SYSTEMS (MS4S), AND NPDES-REGULATED CONSTRUCTION STORM WATER DISCHARGES AND LAS FOR NONPOINT SOURCES ARE EXPRESSED AS THE PERCENT REDUCTION IN AVERAGE ANNUAL SEDIMENT LOAD REQUIRED FOR A SUBWATERSHED CONTAINING IMPAIRED WATERBODIES RELATIVE TO THE APPROPRIATE REDUCED TARGET LOAD (TARGET LOAD MINUS 5% RESERVED WLAS FOR INDUSTRIAL FACILITIES, MINING SITES, AND RMCFS). THE CRITICAL CONDITIONS METHODOLOGY TAKES INTO ACCOUNT ALL FLOW CONDITIONS. THE SEASONAL VARIATION METHODOLOGY ADDRESSES ALL SEASONS. THE MARGIN OF SAFETY (MOS)FEATURES AN IMPLICIT MOS (CONSERVATIVE MODELING ASSUMPTIONS).

NPDES Allocation for Pollutant: Siltation
NPDES ID Other Non PCS Identification Waste Load Allocation Units

TNG110000, TNS068055, TNS075108, TNS075299, TNS075582, TNS075591, TNS076074, TNS068055

TN0063355


TN0079341


TNG110288


TN0026484


TN0064548


TN0065137


TN0067024


TN0002968



Listed Water Causes of Impairment for Siltation
Click on the underlined Waterbody ID for a Waterbody Report. Click on the underlined "Waterbody Map" literal for a map of the Assessment Unit.
Waterbody ID Waterbody Name Map Cycles Listed Cause(s) of Impairment Addressed
TN06010207004_0100 GRABLE BRANCH Waterbody Map 2002, 2004 Siltation
TN06010207011_0500 HINES BRANCH Waterbody Map 2002, 2004 Other Habitat Alteration(s)
TN06010207011_0600 KNOB FORK Waterbody Map 2002, 2004 Siltation, Other Habitat Alteration(s)
TN06010207011_0700 GRASSY CREEK Waterbody Map 2002, 2004 Siltation
TN06010207011_0800 MEADOW CREEK Waterbody Map 2002, 2004 Siltation
TN06010207011_1000 BEAVER CREEK Waterbody Map 2002, 2004 Siltation, Habitat Alterations
TN06010207011_2000 BEAVER CREEK Data Unavailable 2002, 2004 Habitat Alterations, Siltation
TN06010207011_3000 BEAVER CREEK Data Unavailable 2002, 2004 Siltation, Habitat Alterations
TN06010207014_0100 WILLIAMS BRANCH Data Unavailable 2002, 2004 Siltation
TN06010207014_0110 FOSTER BRANCH Data Unavailable 2002, 2004 Siltation
TN06010207014_1000 BULLRUN CREEK Data Unavailable 2002, 2004 Siltation, Habitat Alterations
TN06010207026_0600 BEAR CREEK Waterbody Map 2002, 2004 Habitat Alterations
TN06010207026_1000 EAST FORK POPLAR CREEK Waterbody Map 2002, 2004 Siltation
TN06010207026_2000 EAST FORK POPLAR CREEK Waterbody Map 2002, 2004 Siltation, Other Habitat Alteration(s)

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