Unnamed Tributary IA 04-RAC-1189
mouth at SW arm of Diamondhead Lake (SE 1/4 S14 T78N R30W Guthrie Co.) to headwaters in center S22 T78N R30W Guthrie Co.
Assessment Comments
Assessment based on occurrence of a fish kill in June 1999.
Basis for Assessment
SUMMARY: The general aquatic life uses remain "partially supported." EXPLANATION: The previous (2000) assessment of the aquatic life uses was based on the occurrence of a fish kill in 1999 (see assessment for the 2000 report above). According to IDNR's assessment methodology for Section 305(b) reporting, occurrence of a single pollution-caused fish kill within the most recent three-year period (1999-2001) indicates impairment of the aquatic life uses. Because a pollution-caused fish kill occurred on this stream during the most recent three-year period, the aquatic life uses remain assessed as "partially supported."
Assessment Key Dates
| 6/19/1999 | Biological Monitoring |
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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