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Boulder-Elkhorn Metals TMDLs and Framework Water Quality Improvement Plan – Stakeholder Review Draft

Please note: Wasteload allocations for permitted facilities are still being developed. The allocations presented in Section 5.7 for permitted facilities are not the final allocations. Contact Tim Byron with questions (tbyron@mt.gov, 406-444-5341).

2.01 MB

6/14/12

 Appendix A: Watershed Description Maps

1.56 MB

6/14/12

Appendix B: Table of 2012 Impaired Waterbodies, Impaired Uses, & Impairment Status

0.1 MB

6/14/12

Appendix C: Regulatory Framework & Reference Condition Approach

0.17 MB

6/14/12

Appendix D: Surface Water & Sediment Chemistry Data

0.46 MB

6/14/12 

Appendix E: Water Chemistry for Natural Background Sites

0.1 MB

6/14/12

Appendix F: Target Departure Analysis

1.74 MB

6/14/12

Draft Nutrients, Sediment, & Temperature TMDL Document & Appendices

Boulder-Elkhorn Nutrients, Sediment, & Temperature Draft TMDL Document

Portions of the document are being posted as they are completed. The full draft is expected to be available during the early part of November. 

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Nutrients & Metals Sampling Plans

2009 Sampling and Analysis Plan (0.6 MB)

Appendices A – C (1.91 MB): Chlorophyll-a Photo Packet, Analyte Checklist, and QA/QC Checklist

2010 Sampling and Analysis Plan (0.09 MB)

Nutrients & Metals Sample Results

Metals (water column) Sample Results

Metals (sediment) Sample Results

Nutrients & Chlorophyll-a Sample Results

Spreadsheet of all Metals & Nutrient Sample Results

If you would like a comprehensive spreadsheet containing all data attributes, please contact Christina Staten.

Montana’s Water Quality Standards

“Circular DEQ-7, Montana Numeric Water Quality Standards” contains numeric water quality standards for metals parameters and can be found on DEQ’s Water Quality Standards web page.

DEQ is currently developing numeric water quality criteria for nutrients. See DEQ’s Numeric Nutrient Criteria webpage for additional information and to view the draft Circular DEQ-12 containing proposed numeric values. The proposed values for wadeable streams in the Middle Rockies Level III ecoregion will be applied for the Boulder-Elkhorn nutrient TMDLs.

REPORT

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Sediment and Habitat Conditions and Streambank Erosion Assessments (2.5 MB)

Instream fine sediment data was collected and streambank erosion assessments were performed during the summer of 2010 on 13 streams. This document summarizes the methods used and the data that was collected. A map of sampled sites is included.

Assessment of Sediment Contribution from Hillslope Erosion (Upland Modeling Report) (1.16 MB)

A simple model was used to provide an assessment of existing sediment loading from upland sources and an assessment of potential sediment loading through the application of best management practices.

Boulder River Temperature Assessment (1.32 MB)

Stream temperature, flow, and riparian shade data was collected on the Boulder River during the summer of 2010. This information was used in a QUAL2K model to assess the influence of riparian shading and streamflow on stream temperatures in the Boulder River. This report contains a map of sample locations, summarizes the collected data, and discusses the results of the assessment.