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| Title | Lake Sawyer - Black Diamond Waste Load Allocation Evaluation. | |||
| Month-Year Published | September 1989 | |||
| Online Availability |
4008 kilobytes, requires version 4.0 or later of Adobe Acrobat Reader Software get Acrobat Reader
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| Short Description |
The Black Diamond Wastewater Treatment Facility (WWTF) discharges treated sewage to a wetland, which drains to Rock Creek and then Lake Sawyer. Total phosphorus concentrations in Lake Sawyer increased following start-up of the WWTF. The observed increase in whole-lake total P content corresponds closely to the estimated loading currently discharged from the WWTF. The condition of Lake Sawyer is predicted to reach a eutrophic state in the future (2010) if discharges from the Black Diamond WWTF continue at existing or currently permitted levels of treatment. (Also see abstract below) | |||
| Publication Number | 89-e40 | |||
| Author(s) | Pelletier, G.J. and J.W. Joy. | |||
| Print Availability |
Not maintained in stock. Copy must be made from archive version.
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| Number of pages | 90 pp. | |||
| Keywords | creek, evaluation, facility, lake, treatment, waste, wastewater, water | |||
| Subject Waterbodies |
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| Related Publications | Title | Relationship | ||
| Sawyer Lake Total Maximum Daily Load for Phosphorus | similar topic | |||
| Abstract | Long Description |
The Black Diamond Wastewater Treatment Facility (WWTF) discharges treated sewage to a wetland, which drains to Rock Creek and then Lake Sawyer. Total phosphorus concentrations in Lake Sawyer increased following start-up of the WWTF. The observed increase in whole-lake total P content corresponds closely to the estimated loading currently discharged from the WWTF. The condition of Lake Sawyer is predicted to reach a eutrophic state in the future (2010) if discharges from the Black Diamond WWTF continue at existing or currently permitted levels of treatment. Diversion of WWTF discharge from the Rock Creek/Lake Sawyer system would probably return the condition of the lake to the mesotrophic (threshold eutrophic) condition that existed prior to WWTF start-up. An in-lake total P criterion of 25 ug P/L is recommended for protection of lake water quality. |
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