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Boulder-Elkhorn TMDL Planning Area Documents
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Draft TMDL Documents
A draft version of the metals TMDL document is available for stakeholder review. If you would like to send comments on the document, please email them to Tim Byron or mail to:
Dept. of Environmental Quality
PPA/WQPB
Attn: Tim Byron
P.O. Box 200901
Helena, MT 59620-0901
The nutrient, sediment, and temperature TMDLs will be contained in a separate document and are anticipated to be complete during the second half of 2012. Document pieces will be posted on this page as they become available.
Nutrients and Metals Water Quality Sampling Data
DEQ sampled for a suite of nutrients and metals parameters during high and low flows in 2009 and 2010 throughout the Boulder River watershed. Seventy-three sites were sampled in 2009. A portion of those sites were sampled in 2010, along with 14 new sites. Five sites were sampled in 2011 in order to collect additional data on three streams. The sampling and analysis plans posted below provide tables and maps of sampling locations and the parameters that were sampled at each site. Data from all three years is provided below in both PDF and MS Excel (spreadsheet) formats.
Sediment & Temperature Source Assessment Reports
REPORT
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DESCRIPTION
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Sediment and Habitat Conditions and Streambank Erosion Assessments (2.5 MB)
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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.
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Assessment of Sediment Contribution from Hillslope Erosion (Upland Modeling Report) (1.16 MB)
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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.
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Boulder River Temperature Assessment (1.32 MB)
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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.
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Click on the Adobe icon if you need to download the free Adobe Acrobat software to view these files.
Please contact Christina Staten, if you have problems downloading these documents.
Page Released: August 27, 2009
Last Updated: August 6, 2012