East Fork Lewis River Temperature and Fecal Coliform Source - - PowerPoint PPT Presentation

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East Fork Lewis River Temperature and Fecal Coliform Source - - PowerPoint PPT Presentation

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East Fork Lewis River Temperature and Fecal Coliform Source Assessment Study Presentation of Technical Results East Fork Lewis River Partnership Meeting, August 2018 Sheelagh McCarthy, Washington State Department of Ecology 2004 East Fork

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East Fork Lewis River

Temperature and Fecal Coliform Source Assessment Study Presentation of Technical Results

East Fork Lewis River Partnership Meeting, August 2018 Sheelagh McCarthy, Washington State Department of Ecology

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2004 2005-06 2009 2016 2017 2018

East Fork Lewis River selected for TMDL Quality Assurance Project Plan East Fork Lewis River Temperature and Fecal Coliform Bacteria (Bilhimer et al., 2005) + Sampling (bacteria and temperature) Streamflow Summary for Gaging Stations on the East Fork Lewis River, 2005-06 (Springer, 2009) Surface Water/Groundwater Exchange Along the East Fork Lewis River, 2005 (Carey and Bilhimer, 2009) East Fork Lewis River selected for Source Assessment Quality Assurance Project Plan East Fork Lewis River Fecal Coliform Bacteria and Temperature Source Assessment (Raunig and McCarthy, 2017) + Sampling (bacteria) East Fork Lewis River Temperature and Fecal Coliform Bacteria Source Assessment Report (McCarthy, 2018)

https://ecology.wa.gov/Water-Shorelines/Water-quality/Water-improvement/Total- Maximum-Daily-Load-process/Directory-of-improvement-projects/East-Fork-Lewis-River

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East Fork Lewis River Watershed

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Project Goals

  • Confirm and identify sources of fecal coliform bacteria to the East

Fork Lewis River watershed.

  • Assess existing shade and identify areas with the largest shade

deficits along the East Fork Lewis River to help prioritize implementation strategies.

  • Provide information on key areas to focus implementation efforts.

MAS3.19 BRZ SW2 MCC1.18

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Fecal Coliform Bacteria

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Dry Season June - October Wet Season November - May McCormick Creek (MCC 3.4)

Seasons

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Bacteria Sampling Results

2017 2005-06

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𝑀𝑝𝑏𝑒((π‘π‘—π‘šπ‘šπ‘—π‘π‘œ 𝑑𝑔𝑣)/𝑒𝑏𝑧) = 𝐢𝑏𝑑𝑒𝑓𝑠𝑗𝑏 π·π‘π‘œπ‘‘π‘“π‘œπ‘’π‘ π‘π‘’π‘—π‘π‘œ ( 𝑑𝑔𝑣 100𝑛𝑀) βˆ— πΊπ‘šπ‘π‘₯ 𝑑𝑔𝑑 βˆ— π·π‘π‘œπ‘€π‘“π‘ π‘‘π‘—π‘π‘œ 𝐺𝑏𝑑𝑒𝑝𝑠

Bacteria Seasonal Loading

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Bacteria Recommended Reductions

Completed using Statistical Rollback Analysis

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Temperature

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7-DADMax is the 7-day average of the daily maximum temperatures

Temperature Results

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Measuring Effective Shade

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Shade Deficit (%) = Potential Shade (%) – Current Effective Shade (%)

Detailed methodology in QAPP (Raunig and McCarthy, 2017) and Report (McCarthy, 2018)

Shade Analysis Results

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Questions?

East Fork Lewis River Website Sheelagh McCarthy shem461@ecy.wa.gov Source Assessment Report Author Devan Rostorfer dros461@ecy.wa.gov East Fork Lewis River TMDL Lead