McLoud Run IA 02-CED-508
Alternate name(s) for this segment: Cold Stream
mouth (SW 1/4 S16 T83N R7W Linn Co.) to headwaters in SW 1/4 S5 T83N R7W Linn Co.
Assessment Comments
Assessment is based on fish kills caused by watermain breaks in summer 1997.
Basis for Assessment
Assessed support of general uses as impaired (=PS) due to two fish kills within one month in 1997 due to municipal watermain breaks that discharged chlorinated water to the stream. Fish kills occurred on June 25 and July 23, 1997. Impairment based on general use water quality criterion that states general use waters "shall be free from substances attributable to wastewater discharges or agricultural practices in concentrations or combinations which are acutely toxic to human, animal, or plant life."
Assessment Key Dates
| 7/23/1997 | Fishkill |
| 6/25/1997 | Fishkill |
Methods
| 140 | Incidence of spills and/or fish kills |
Monitoring Levels
| Biological | 0 |
| Habitat | 0 |
| Physical Chemistry | 0 |
| Toxic | 0 |
| Pathogen Indicators | 0 |
| Other Health Indicators | 0 |
| Other Aquatic Life Indicators | 0 |
| # of Bio Sites | 0 |
| BioIntegrity | N/A |
| Causes | Use Support | Cause Magnitude | Sources | Source Magnitude |
|---|---|---|---|---|
| Thermal modifications | Overall Use Support | Moderate |
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| Thermal modifications | Aquatic Life Support | Moderate |
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| Pesticides | Fish Consumption | Not Impairing |
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