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| Title | Chehalis Best Management Practices Evaluation Project, Final Report for Water Quality Sites | |||
| Month-Year Published | April 2002 | |||
| Online Availability |
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| Short Description |
The Washington State Department of Ecology conducted water quality monitoring to document improvements in water quality associated with best management practices (BMPs) installed in the upper Chehalis basin. Monitoring was conducted in three sub-basins where BMPs were applied: Beaver and Allen creeks in Thurston County, Bunker and Deep creeks in Lewis County, and Berwick and Dillenbaugh creeks in Lewis County. (Also see abstract below) | |||
| Publication Number | 02-03-015 | |||
| Author(s) | Sargeant, D., S. O'Neal, and W. Ehinger | |||
| Print Availability | ||||
| Number of pages | 00 pp. | |||
| Keywords | basin, best management practice, bunker, county, creek, dairy, evaluation, monitoring, quality, report , study, Thurston, waste, water, water quality | |||
| Subject Waterbodies |
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| Related Publications | Title | Relationship | ||
| Chehalis Best Management Practices Evaluation Project, 1995-2000 Temperature Monitoring Data | similar topic | |||
| Abstract | Long Description |
The Washington State Department of Ecology conducted water quality monitoring to document improvements in water quality associated with best management practices (BMPs) installed in the upper Chehalis basin. Monitoring was conducted in three sub-basins where BMPs were applied: Beaver and Allen creeks in Thurston County, Bunker and Deep creeks in Lewis County, and Berwick and Dillenbaugh creeks in Lewis County. Monitoring design included pre- and post-BMP sampling, upstream and downstream. Types of BMPs evaluated included fencing agricultural riparian corridors (animal exclusion), implementing dairy waste management plans, and revegetation of riparian areas. Several erosion control practices -- such as bank stabilization, exclusion of off-road vehicles, and culvert removal or replacement -- also were evaluated. 1. Monitoring on Beaver Creek and Allen Creek showed major improvements in fecal coliform and ammonia-nitrogen levels due to implementation of BMPs on a large dairy farm. Water quality in Beaver Creek improved such that progress was made toward meeting the load allocations required by the total maximum daily load (TMDL) study. Further reductions in fecal coliform levels at all Beaver and Allen creek sites are still needed to meet water quality standards and the load allocation required in the TMDL. 2. In Deep Creek and Bunker Creek, improvements in fecal coliform levels were detected at one site. However, increases in fecal coliform levels were seen the following year when BMPs were not maintained properly. No other water quality improvements due to BMP implementation were noted. 3. An improvement in fecal coliform levels occurred on Berwick Creek after agricultural fencing was maintained properly. However, improvements due to BMP implementation were not detected at the other sites. This may be due, in part, to differences in pre- and post-BMP sampling regimes. In summary, agricultural BMPs are effective in improving water quality if the BMPs are maintained properly. |
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