• If you are citizen of an European Union member nation, you may not use this service unless you are at least 16 years old.

  • You already know Dokkio is an AI-powered assistant to organize & manage your digital files & messages. Very soon, Dokkio will support Outlook as well as One Drive. Check it out today!

View
 

Tobacco River TMDL Planning Area

This version was saved 12 years, 8 months ago View current version     Page history
Saved by Christina Staten
on July 19, 2011 at 12:48:44 pm
 

Draft document pieces removed & information posted about public comment period

 

Tobacco TMDL Planning Area Sediment TMDLs

 


 

The public comment period for the draft Tobacco Planning Area Sediment TMDLs and Framework Water Quality Improvement Plan began Tuesday, July 19, 2011 and ends at 5 p.m. Monday, August 22, 2011. The draft document can be found on DEQ's website at: http://deq.mt.gov/pubcom.mcpx. Comments may be submitted to TMDLComments@mt.gov or by U.S. Postal Service to:

Department of Envrionmental Quality

PPA/WQPB

P.O. Box 200901

Helena, MT 59620-0901

 

A public meeting will be held Thursday, August 11, 2011 at the Lincoln Electric Cooperative Building in Eureka (500 Osloski Road).

An open house will be held from 6 to 7 p.m., and a short presentation will be given at 7:15. A question and answer session will follow until 8:30 p.m.

 

Previous versions of the draft document have been removed from this page, however the description of changes that were made to the document after the September, 2009 stakeholder meeting remains below. The September, 2009 stakeholder presentation is also included below.

 

Please contact Christina Staten at 406-444-2836 if you have questions.

 


 

Summay of Edits Included in the draft Tobacco sediment TMDL document

 

DOCUMENT PORTION & DESCRIPTION OF ITS CONTENTS SUMMARY OF EDITS

Section 5.0 - 5.5 

  • Description of assessment methods
  • Sediment water quality targets
  • Comparison of each waterbody's existing water quality conditions to the targets
  • Determination of which waterbodies will receive a TMDL 

Posted April 15, 2011

 

  • Significant edits to target development with expanded rationale and increased reliance on a variety of reference data sets such as the FS PIBO data.  
  • Improvements to the biology evaluation 
  • Sediment TMDLs developed for all evaluated streams 

 

Posted June 16, 2011

Note: To be consistent with other recent sediment TMDLs, the statistic for comparing width to depth ratio and entrenchment ratio to the target will be based on the median, versus the average. When adjusted, there was no subsequent impact to any of the impairment conclusions and only minor modifications to the target comparison summaries.

Section 5.6 - Source Assessment

  • Eroding Streambank Assessment
  • Upland Erosion & Riparian Bufferring Capacity
  • Road Sediment Assessment
  • Point Sources 

Posted June 13, 2011

 

  • Added point source assessment details
  • Added more loading summary details from existing condition and load reduction scenarios
  • Integrated updated road related load analysis results for parallel segments, road sanding, and other information consistent with recently identified updates to roads appendix (Appendix G; see below). 

Section 5.7 - TMDLs and Allocations

  • Development of allocations for each source category
  •  TMDLs and allocations for each stream (Edna, Deep, Fortine, Lime, Sinclair, Swamp, and Therriault creek; Tobacco River) 

Posted June 16, 2011 

  • Minor TMDL and allocation number updates based on source assessment updates within Section 5.6 and the roads appendix (App G).
  • Added TMDLs and allocations for Lime and Swamp creeks, and the Tobacco River (based on updated target and departure analysis within Sections 5.4 and 5.5).
  • Added language comparing the Grave Creek watershed source assessment and allocation methods from this document and the 2005 Grave Creek TMDL.
  • Added wasteload allocation language for permitted point sources
  • Added additional daily load language and reference to newly coreated daily loads appendix (App H)
  • Added language on how to meet the intent of the allocations.
  • Addressed culverts via allocation approach consistent with other recent sediment TMDLs.
  • Linked the non-pollutant habitat alteration type impairments to the sediment TMDLs for each stream, where applicable. 

Appendix C, Regulatory Framework &  Reference Condition Approach

  • Sediment water quality standards, stream classifications and benefical uses
  • DEQ approach for determining reference conditions
  • Use of statistics for developoing reference values or ranges 

Posted April 15, 2011

Previously Appendix B

 

  • Language clarifications
  • Updated reference approach description

Appendix G, Road Sediment Assessment

  • Site selection methods, data collection methods & assessment methodology
  • Sediment load estimates from road crossings and parallel segments
  • Culvert and fish passage assessment
  • Best management practice scenarios and estimated load reductions 
  • Assessment of existing BMPs and BMP recommendations 
  • WEPP modeling results for assessed crossing and parallel segments 

  

Posted June 10, 2011

Previously Appendix F

 

  • Removed introduction language that was redundant with information already presented within the document
  • Corrected climate station information
  • Computed load values for parallel segments because it was concluded that the parallel segments represent a significant load after making corrections to loading values.
  • Added additional language comparing private and federal road crossing loads based on stratification of landscape type and ownership. Also added language comparing federal to private crossings regarding load reductions and reduction precentages with the 200 foot BMP scenario in place. This information had always been within tables of the original appendix, but language discussing these results by ownership was not previously included
  • Computed unpaved road load information for Lime Creek
  • Developed a road sand load estimate based on approaches from other TMDL documents. Road sanding information was previously in the document, but no load estimate was developed.
  • Developed a road load estimate approach for the Grave Creek watershed, based on the method used for the remainder of the Tobacco watershed, so that a total road watershed load could be computed. This was desirable because a completely different modeling approach was used for the 2004 Grave Creek TMDL. 
  • Computed ownership information relative to culvert failure potential; this information is added to tables and via additional summary language. 

 

Notes:

The Tobacco River is labeled incorrectly on all maps (Figures 1- 6). This will be corrected prior to release for pubic comment. A map of all field assessed sites will also be added.

 

This document has not been formatted.

 

 

 


2009 Stakeholder Presentation & Post Presentation Document Notes

 

11-18-09 stakeholder presentation (1.87 MB).

 

Draft Document Notes (updated 11-20-09):

Several edits will be made to the document prior to releasing for the public comment period. Edits will include:

  • A correction to the Unpaved Roads Appendix to state that climate stations within the Tobacco River watershed were used, as opposed to those in Ravalli County.
  • A waste load allocation will be included for Deep Creek for the Plum Creek Ksanka Sawmill Industrial Storm Water Permit even though this facility is no longer operating, the permit is still in place and requies a WLA per EPA guidance (3-15-11 update: the permit has been terminated and a WLA will not be developed)
  • For consistency purposes, the Watershed Characterization will be renamed to Watershed Description
  • The list of references will be completed
  • Appendix G (the TMDLs expressed as daily loads) will be completed and included with the document
  • Edits will be made to language regarding use of macroinvertebrate data
  • Other language clarifications

This is not an all-inclusive list of edits.

 

 


 

Page Created: July 23, 2009

Last Updated: July 19, 2011 (Draft document removed & info posted about public comment period) 

 

Recent visitors to the wiki:

    You now