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TMDL Document for DOG CREEK (HEADWATERS TO MEADOW CREEK) - LITTLE BLACKFOOT TPA

TMDL ID: 41465 TMDL Name: DOG CREEK (HEADWATERS TO MEADOW CREEK) - LITTLE BLACKFOOT TPA
State/Tribe: Montana TMDL Date: 12/30/2011
EPA Action: EPA Approved Comments: SEDIMENT LA BREAKOUT: ROADS = 0.4 TONS/YR STREAMBANKS = 0.8 TONS/YR UPLAND = 100 TONS/YR

No TMDL Documents have been uploaded for this TMDL.

TMDL Pollutant: Arsenic

Total Waste Load Allocation: .09      Total Load Allocation: .008
Explicit Margin Of Safety:      Implicit Margin Of Safety: Y
Units for Total Waste Load Allocation and Total Load Allocation: LBS/DAY      TMDL Pollutant Source Type: Point/Nonpoint Source
TMDL End Point: HUMAN HEALTH STANDARD: 10 UG/L

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

Abandoned Mines


Listed Water Causes of Impairment for Arsenic
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
MT76G004_071 Dog Creek Waterbody Map 2000, 2002, 2004, 2006, 2008, 2010, 2012 Arsenic

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TMDL Pollutant: Cadmium

Total Waste Load Allocation: .004      Total Load Allocation: 0
Explicit Margin Of Safety:      Implicit Margin Of Safety: Y
Units for Total Waste Load Allocation and Total Load Allocation: LBS/DAY      TMDL Pollutant Source Type: Point/Nonpoint Source
TMDL End Point: CHRONIC AQUATIC LIFE CRITERIA AT 100 MG/L HARDNESS = 0.27 UG/L

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

Abandoned Mines


Listed Water Causes of Impairment for Cadmium
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
MT76G004_071 DOG CREEK Waterbody Map Unlisted but Impaired

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TMDL Pollutant: Copper

Total Waste Load Allocation: .13      Total Load Allocation: .003
Explicit Margin Of Safety:      Implicit Margin Of Safety: Y
Units for Total Waste Load Allocation and Total Load Allocation: LBS/DAY      TMDL Pollutant Source Type: Point/Nonpoint Source
TMDL End Point: CHRONIC AQUATIC LIFE CRITERIA AT 100 MG/L HARDNESS = 9.33 UG/L

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

Abandoned Mines


Listed Water Causes of Impairment for Copper
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
MT76G004_071 DOG CREEK Waterbody Map Unlisted but Impaired

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TMDL Pollutant: Lead

Total Waste Load Allocation: .053      Total Load Allocation: .001
Explicit Margin Of Safety:      Implicit Margin Of Safety: Y
Units for Total Waste Load Allocation and Total Load Allocation: LBS/DAY      TMDL Pollutant Source Type: Point/Nonpoint Source
TMDL End Point: CHRONIC AQUATIC LIFE CRITERIA AT 100 MG/L HARDNESS = 3.18 UG/L

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

Abandoned Mines


Listed Water Causes of Impairment for Lead
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
MT76G004_071 Dog Creek Waterbody Map 2000, 2002, 2004, 2006, 2008, 2010, 2012 Lead

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TMDL Pollutant: Sediment

Total Waste Load Allocation:      Total Load Allocation: 100
Explicit Margin Of Safety:      Implicit Margin Of Safety: Y
Units for Total Waste Load Allocation and Total Load Allocation: TONS/YEAR      TMDL Pollutant Source Type: Nonpoint Source
TMDL End Point: RIFFLE FINE SED <6MM VIA PEBBLE CT: B3/C30FT1.4, C>3.2, E>3.7 RESIDUAL POOL DEPTH: BY BANKFULL WIDTH: <15FT: >OR=0.9FT; 15-30FT: >OR=1.4FT, >30FT: >OR=1.4FT POOLS/MILE: BY BANKFULL WIDTH: <15FT: >OR=90; 15-30FT: >OR=52, >30FT: >OR=15 LARGE WOODY DEBRIS/MILE: BY BANKFULL WIDTH: <15FT: >OR=222; 15-30FT: >OR=186, >30FT: >OR=122 % UNDERSTORY SHRUB COVER: >OR=40% UNLESS MOSTLY CONIFERS, THEN >OR=10% MACROINVERTEBRATE INDICES: MTN MMI >OR=63; VALLEY MMI >OR=48; O/E >OR=0.80


Listed Water Causes of Impairment for Sediment
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
MT76G004_071 DOG CREEK Waterbody Map 2000, 2002, 2004 Riparian Habitat Alteration
MT76G004_071 DOG CREEK Waterbody Map 2000, 2002, 2004 Other Habitat Alteration(s), Riparian Degradation
MT76G004_071 DOG CREEK Waterbody Map 2000, 2002, 2004, 2006, 2008, 2010, 2012 Siltation
MT76G004_071 Dog Creek Waterbody Map 2000, 2002, 2004, 2006, 2008, 2010, 2012 Sedimentation/Siltation

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TMDL Pollutant: Zinc

Total Waste Load Allocation: 1.676      Total Load Allocation: .026
Explicit Margin Of Safety:      Implicit Margin Of Safety: Y
Units for Total Waste Load Allocation and Total Load Allocation: LBS/DAY      TMDL Pollutant Source Type: Point/Nonpoint Source
TMDL End Point: CHRONIC AQUATIC LIFE CRITERIA AT 100 MG/L HARDNESS = 119.82 UG/L

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

Abandoned Mines


Listed Water Causes of Impairment for Zinc
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
MT76G004_071 Dog Creek Waterbody Map 2000, 2002, 2004, 2006, 2008, 2010, 2012 Zinc

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