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TMDL Document for SPRING CREEK (HEADWATERS TO THE MOUTH) - LAKE HELENA PLANNING AREA

TMDL ID: 31488 TMDL Name: SPRING CREEK (HEADWATERS TO THE MOUTH) - LAKE HELENA PLANNING AREA
State/Tribe: Montana TMDL Date: 09/27/2006
EPA Action: EPA Approved Comments: 1996 LIST ID IS MT41I0068; PH IS MEETING WQ STANDARDS AND WAS DELISTED.

TMDL Documents

Click on the underlined Document Type to retrieve the actual document in PDF format.
Document Type Comments
TMDL Document  

TMDL Pollutant: Arsenic

Total Waste Load Allocation:      Total Load Allocation: 213.4
Explicit Margin Of Safety:      Implicit Margin Of Safety: Y
Units for Total Waste Load Allocation and Total Load Allocation: LB/YR      TMDL Pollutant Source Type: Nonpoint Source
TMDL End Point: AQUATIC LIFE (ACUTE): 340 żG/L AQUATIC LIFE (CHRONIC): 150 żG/L HUMAN HEALTH: 10 żG/L

NPDES Allocation for Pollutant: Arsenic
NPDES ID Other Non PCS Identification Waste Load Allocation Units
MT0028428



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
MT41I006_080 SPRING CREEK Waterbody Map 2000, 2002, 2004, 2006, 2008, 2010, 2012 Metals (other than Mercury)

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TMDL Pollutant: Cadmium

Total Waste Load Allocation: 4.1      Total Load Allocation: 11.8
Explicit Margin Of Safety:      Implicit Margin Of Safety: Y
Units for Total Waste Load Allocation and Total Load Allocation: LB/YR      TMDL Pollutant Source Type: Point/Nonpoint Source
TMDL End Point: AQUATIC LIFE (ACUTE): 8.95 żG/L AT 400 MG/L HARDNESS AQUATIC LIFE (CHRONIC): 0.75 żG/L AT 400 MG/L HARDNESS HUMAN HEALTH: 5 żG/L

NPDES Allocation for Pollutant: Cadmium
NPDES ID Other Non PCS Identification Waste Load Allocation Units
MT0028428
4.1
 LB/YR


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
MT41I006_080 SPRING CREEK Waterbody Map 2000, 2002, 2004, 2006, 2008, 2010, 2012 Metals (other than Mercury)

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TMDL Pollutant: Copper

Total Waste Load Allocation: 77.6      Total Load Allocation: 590.4
Explicit Margin Of Safety:      Implicit Margin Of Safety: Y
Units for Total Waste Load Allocation and Total Load Allocation: LB/YR      TMDL Pollutant Source Type: Point/Nonpoint Source
TMDL End Point: AQUATIC LIFE (ACUTE): 51.0 żG/L AT 400 MG/L HARDNESS AQUATIC LIFE (CHRONIC): 29.8 żG/L AT 400 MG/L HARDNESS HUMAN HEALTH: 1,300 żG/L

NPDES Allocation for Pollutant: Copper
NPDES ID Other Non PCS Identification Waste Load Allocation Units
MT0028428
77.6
 LB/YR


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
MT41I006_080 SPRING CREEK Waterbody Map 2000, 2002, 2004, 2006, 2008, 2010, 2012 Metals (other than Mercury)

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TMDL Pollutant: Lead

Total Waste Load Allocation: 51.1      Total Load Allocation: 168.7
Explicit Margin Of Safety:      Implicit Margin Of Safety: Y
Units for Total Waste Load Allocation and Total Load Allocation: LB/YR      TMDL Pollutant Source Type: Point/Nonpoint Source
TMDL End Point: AQUATIC LIFE (ACUTE): 468.3 żG/L AT 400 MG/L HARDNESS AQUATIC LIFE (CHRONIC): 18.2 żG/L AT 400 MG/L HARDNESS HUMAN HEALTH: 15 żG/L

NPDES Allocation for Pollutant: Lead
NPDES ID Other Non PCS Identification Waste Load Allocation Units
MT0028428
51.1
 LB/YR


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
MT41I006_080 SPRING CREEK Waterbody Map 2000, 2002, 2004, 2006, 2008, 2010, 2012 Metals (other than Mercury)

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TMDL Pollutant: Nitrogen, Total

Total Waste Load Allocation:      Total Load Allocation: 5.84
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: 0.33 MG/L TOTAL NITROGEN

NPDES Allocation for Pollutant: Nitrogen, Total
NPDES ID Other Non PCS Identification Waste Load Allocation Units

999


Listed Water Causes of Impairment for Nitrogen, Total
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
MT41I006_080 SPRING CREEK Waterbody Map Unlisted but Impaired

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TMDL Pollutant: Phosphorus, Total

Total Waste Load Allocation:      Total Load Allocation: .95
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: 0.04 MG/L TOTAL PHOSPHORUS

NPDES Allocation for Pollutant: Phosphorus, Total
NPDES ID Other Non PCS Identification Waste Load Allocation Units

999


Listed Water Causes of Impairment for Phosphorus, Total
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
MT41I006_080 SPRING CREEK Waterbody Map Unlisted but Impaired

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TMDL Pollutant: Total Suspended Solids (TSS)

Total Waste Load Allocation:      Total Load Allocation: 2000
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: % OF SUBSURFACE FINES < 6.4 MM: < OR = TO THE AVERAGE VALUE FOR ALL HELENA NATIONAL FOREST REFERENCE STREAM CORE SAMPLES % OF SURFACE FINES < 2.0 MM: 0.2 WIDTH/DEPTH RATIO: COMPARABLE TO REFERENCE VALUES. BEHI: COMPARABLE TO REFERENCE VALUES. D50: COMPARABLE TO REFERENCE VALUES. PFC: PROPER FUNCTIONING CONDITION OR "FUNCTIONAL - AT RISK" WITH AN UPWARD TREND. MACRO IBI: TO BE DETERMINED


Listed Water Causes of Impairment for Total Suspended Solids (Tss)
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
MT41I006_080 SPRING CREEK Waterbody Map Unlisted but Impaired

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TMDL Pollutant: Zinc

Total Waste Load Allocation: 1770      Total Load Allocation: 12629
Explicit Margin Of Safety:      Implicit Margin Of Safety: Y
Units for Total Waste Load Allocation and Total Load Allocation: LB/YR      TMDL Pollutant Source Type: Point/Nonpoint Source
TMDL End Point: AQUATIC LIFE (ACUTE): 392.6 żG/L AT 400 MG/L HARDNESS AQUATIC LIFE (CHRONIC): 392.6 żG/L AT 400 MG/L HARDNESS HUMAN HEALTH: 2,000 żG/L

NPDES Allocation for Pollutant: Zinc
NPDES ID Other Non PCS Identification Waste Load Allocation Units
MT0028428
1770
 LB/YR


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
MT41I006_080 SPRING CREEK Waterbody Map 2000, 2002, 2004, 2006, 2008, 2010, 2012 Metals (other than Mercury)

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