Brushy Creek IA 04-RAC-1209
from confluence with unnamed tributary (S6 T82N R34W Carroll Co.) to headwaters in S27 T84N R36W Carroll Co.
Assessment Comments
Assessment is based on results of an IDNR investigation of a fish kill in May 2000.
Basis for Assessment
SUMMARY: The general aquatic life uses are assessed (monitored) as "partially supported" due to occurrence of a fish kill in May 2000.
EXPLANATION: A fish kill occurred on this stream segment on May 3, 2000. The kill affected approximatley 6 miles of Brushy Creek north of Halbur in Carroll County. The kill started approximately 5 miles NNW of Halbur in Section 23, T84N, R36W and extended approximately 6 miles downstream; an estimated 6,000 fish were killed. The kill was apparently caused by truck wash effluent from a livestock trailer washing operation. The party responsible for the kill was identified, and restitution was sought. According to DNR's assessment methodology for Section 305(b) reporting, occurrence of a single pollution-caused fish kill during the most recent three-year period (2000-02) indicates "partial support" of the aquatic life uses. Thus, the general aquatic life uses of this stream segment were assessed as "partially supported."
Assessment Key Dates
| 5/3/2000 | 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 |
|---|---|---|---|---|
| Organic enrichment/Low DO | Overall Use Support | Moderate |
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| Organic enrichment/Low DO | Aquatic Life Support | Moderate |
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| Unionized Ammonia | Overall Use Support | Moderate |
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| Unionized Ammonia | Aquatic Life Support | Moderate |
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