Simpson Creek IA 01-TRK-214
mouth (S30 T95NR10W Fayette Co.) to headwaters in S36 T96N R12W Chickasaw Co.
Assessment Comments
Assessment is based on occurrence of fish kill in July 2001. See attached document for details.
Basis for Assessment
The general aquatic life uses are assessed (evaluated) as "partially supported" due to occurrence of a fish kill. EXPLANATION: A fish kill occurred on this stream reach on July 23, 2001. The kill affected approximately 4 miles of Simpson Creek in Sections 16, 17, 21, 22, and 27 of T95N, R11W, Chickasaw Co. The kill was caused by discharge of hog manure; an estimated 32,700 fish were killed. 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 indicates "partial support" of the aquatic life uses. Thus, the general aquatic life uses of this stream were assessed as "partially supported."
Assessment Key Dates
| 7/23/2001 | 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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