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TMDL Document for UNION CREEK - LOWER BLACKFOOT TPA
| TMDL ID: | 38166 | TMDL Name: | UNION CREEK - LOWER BLACKFOOT TPA | ||
| State/Tribe: | Montana | TMDL Date: | 12/23/2009 | ||
| EPA Action: | EPA Approved | Comments: | THE METALS TMDLS ARE PRESENTED FOR A CRITICAL LOW FLOW CONDITION OF 0.25 CFS. | ||
No TMDL Documents have been uploaded for this TMDL.
TMDL Pollutant: Iron
| Total Waste Load Allocation: | .8 | Total Load Allocation: | .4 | |
| 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 (UG/L) >1000 | |||
| NPDES Allocation for Pollutant: Iron | |||
| NPDES ID | Other Non PCS Identification | Waste Load Allocation | Units |
|---|---|---|---|
| Copper Cliff Abandoned Mine Area |
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| Listed Water Causes of Impairment for Iron Click on the underlined Waterbody ID for a Waterbody Report. Click on the underlined "Waterbody Map" literal for a map of the Assessment Unit. |
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| Waterbody ID | Waterbody Name | Map | Cycles Listed | Cause(s) of Impairment Addressed | |
|---|---|---|---|---|---|
| MT76F006_010 | UNION CREEK | Waterbody Map | 2000, 2002, 2004, 2006, 2008, 2010, 2012 | Metals (other than Mercury) | |
TMDL Pollutant: Sedimentation/Siltation
| Total Waste Load Allocation: | Total Load Allocation: | 2971 | ||
| 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 SURFACE FINES <6MM (BY CHANNEL TYPE) <=37 POOL FREQUENCY (COUNT/MILE BY CHANNEL TYPE) >=50 RESIDUAL POOL DEPTH (IN FT BY CHANNEL TYPE) >=0.08 | |||
| Listed Water Causes of Impairment for Sedimentation/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. |
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| Waterbody ID | Waterbody Name | Map | Cycles Listed | Cause(s) of Impairment Addressed | |
|---|---|---|---|---|---|
| MT76F006_010 | Union Creek | Waterbody Map | 2000, 2002, 2004, 2006, 2008 | Suspended Solids | |
TMDL Pollutant: Temperature
| Total Waste Load Allocation: | Total Load Allocation: | 73000000 | ||
| Explicit Margin Of Safety: | Implicit Margin Of Safety: | Y | ||
| Units for Total Waste Load Allocation and Total Load Allocation: | KCAL/DAY | TMDL Pollutant Source Type: | Nonpoint Source | |
| TMDL End Point: | % WOODY BANKLINE VEGETATION EXTENT >=76 % REDUCTION IN W:D RATIO (2 REACHES) >=16 % JULY-AUGUST FLOW AUGMENTATION >=15 | |||
| Listed Water Causes of Impairment for Temperature Click on the underlined Waterbody ID for a Waterbody Report. Click on the underlined "Waterbody Map" literal for a map of the Assessment Unit. |
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| Waterbody ID | Waterbody Name | Map | Cycles Listed | Cause(s) of Impairment Addressed | |
|---|---|---|---|---|---|
| MT76F006_010 | Union Creek | Waterbody Map | 2000, 2002, 2004, 2006, 2008 | Temperature | |