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Title

Integrated Ambient Monitoring Follow-up Study in Indian Creek: An Investigation of the Causes of Biological Impairment and a Further Demonstration of the Instream Monitoring Approach

 
Publication number Date Published
14-03-050December 2014
VIEW NOW: Integrated Ambient Monitoring Follow-up Study in Indian Creek: An Investigation of the Causes of Biological Impairment and a Further Demonstration of the Instream Monitoring Approach (Number of pages: 97) (Publication Size: 2279KB)




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Author(s) Marshall, R., B. Era-Miller, and S. Collyard
Description The 2013 study expanded on work conducted in 2010 which indicated that lower Indian Creek would not support salmon reproduction. A stormwater pipe, suspected of causing toxicity to aquatic organisms in 2010, was bracketed with additional monitoring stations in 2013. Monitoring included instream exposures of rainbow trout eyed embryos in simulated redds and ended with swim-up fry. Alevin survival was 4% downstream of the stormwater pipe and 60% just upstream. Fry survival 13 days later at upper Indian Creek was 93%.

Lower site benthic communities also showed impairment. Surface water, stormwater, groundwater, and sediment were analyzed for metals, PAHs, and other organics. Results show lower Indian Creek to again be unsuitable for salmon reproduction and implicate a mixture of pollutants.
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Contact Brandee Era-Miller at 360-407-6771 or bera461@ecy.wa.gov
Keywords toxicity, ambient monitoring, urban, stormwater
WATERSHED Water Resource Inventory Area 13 Deschutes
DATA Environmental Information Management (EIM) #BERA0010

RELATED PUBLICATIONS Title:

Quality Assurance Project Plan: Integrated Ambient Monitoring in Indian Creek: Phase II Study

Integrated Ambient Monitoring Pilot Report: Potential Causes for Impairment of Rainbow Trout Early Lifestages and Loss of Benthic Biodiversity in Indian Creek