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Little Blackfoot TMDL Planning Area

Page history last edited by Christina Staten 6 years, 11 months ago Saved with comment

The "Little Blackfoot River Watershed TMDLs and Framework Water Quality Improvement Plan" was approved by EPA in December, 2011. The final document can be found on DEQ's Final TMDL Documents webpage. This page contains an overview of the project and documents that were used during TMDL planning stages of the project.


 

OVERVIEW

 

The majority of the Little Blackfoot TMDL Planning Area (TPA) is within Powell County, with a small portion in Lewis and Clark County. The Little Blackfoot River originates in the Helena National Forest near Blackfoot Meadows and flows approximately 47 miles to its confluence with the Clark Fork River near Garrison. The total extent of the watershed is 264,124 acres, or approximately 413 square miles. The TPA is located within the Upper Clark Fork hydrologic unit (17010201), and is coincident with the combined 170102015 and 170102016 fifth-code watersheds. The TPA is bounded by the continental divide to the northeast and southeast, the Garnet Mountains to the northwest, and the divide between Spotted Dog Creek and the Clark Fork River to the southwest.

                                                            [Click image to enlarge] 

 

 

The Montana Department of Environmental Quality identified the Little Blackfoot River and six of its tributaries to have water quality impairments in the Little Blackfoot River TPA. Data collected to assist with TMDL development also indicated water quality impairments in an additional four streams, which were addressed within the scope of the TMDL document. The pollutants of concern in the Little Blackfoot River TPA are sediment, nutrients, and metals. Impairment listings from Montana's 2010 Water Quality Integrated Report are indicated with and “X” in the table below and additional waterbodies that were evaluated for TMDL development are indicated with an “O” in the table. Waterbodies indicated with an “O” were also selected for evaluation based on a combination of habitat impairment listings that may be related to a pollutant, issues identified during source assessment work for the 303(d) listed waterbodies, and stakeholder input. For complete information on each stream's probable impairment causes and sources, see DEQ's Clean Water Act Information Center. (Click on "Search," select the "By Location" tab, and then select "Little Blackfoot" in the TMDL Planning Area (TPA) drop-down list.

 

 

  

 

PROJECT DOCUMENTS

 

SAP = sampling and analysis plan 

Nutrients and Metals  
Planning Documents  Reports

2008 Nutrients and Metals SAP (0.1 MB)

 

Appendices (0.9 MB)

2008 Nutrient/Metals Sampling QAQC Report (1.4MB) 

Note: Not a data report and no data interpretation

 

2009 Nutrient and Metals SAP (0.2 MB)

 

Appendix A (0.6 MB)

Appendices B-D (0.6 MB)

2009 Nutrient/MetalsSampling QAQC Report 

(Note: Not a data report and no data interpretation)

 

2008/2009 data available for download from STORET (search HUC 17010201)

2010 Nutrient SAP (0.07 MB) Summary graphs of 1998-2009 summer nutrient data
   
Sediment  
Planning Documents  Reports
2009 Sediment and Habitat SAP (1.2 MB)

Sediment and Habitat Assessment QA/QC Review (0.05 MB)

See the Appendix C of the final TMDL document for a summary of the sediment and habitat data. 

2009 Roads SAP (0.3 MB)

Roads GIS Data and Summary Statistics (0.9 MB)

 

See Appendix E of the final TMDL document for the roads sediment assessment. 

 

 

PROJECT SCHEDULE

 

TMDLs for this project were completed in 2011. The final TMDL document can be found on DEQ's Final TMDL Documents webpage. Water quality sampling was conducted for metals and nutrients in 2008, 2009, and 2010. Data are available for download from STORET and associated with watershed/HUC 17010201 (Upper Clark Fork) and Organization ID MTWTRSHD__WQX. Sediment and habitat sites that help DEQ evaluate the existing stream condition and bank erosion were assessed in 2009, as well as the sediment contribution from roads. 

 

 

CONTACTS

 

Name Project Role Phone
Lisa Kusnierz  TMDL Project Coordinator  457-5001
Erik Makus  Project Modeler 444-6742 
Christina Staten  Wiki Administrator  444-2836 

 

 

Page Released: July 20, 2010

Last Updated: October 24, 2013