East Fork Des Moines River IA 04-EDM-1793
from confluence with Prairie Cr. (west line S18 T98N R29W Kossuth Co.) to confluence unnamed tributary SSW of Armstrong in S22 T98N R31W Emmet Co.
Assessment Comments
Assessment is based on results of IDNR/UHL biological (biocriteria) sampling in 1997.
Basis for Assessment
SUMMARY: The Class B(WW) aquatic life uses are assessed (monitored) as “partially supported” based on results of IDNR/UHL biological monitoring conducted in 1997 as part of the stream biorcriteria project.
EXPLANATION: The aquatic life use support remains assessed as “partially supporting” based on a comparison of the F-IBI and BM-IBI scores with biological assessment criteria established specifically for the 2002 Section 305(b) report: fish IBI= 29 (fair), BM-IBI= 46 (fair). The biological assessment criteria were determined from a statistical analysis of data collected at stream ecoregion reference sites from 1994-2001.
Assessment Key Dates
| 10/14/1997 | Biological Monitoring |
Methods
| 330 | Fish surveys |
| 380 | Quan. measurements of instream parms-- channel morphology-- floodplain-- 1-2 seasons-- by prof |
| 220 | Non-fixed station physical/chemical monitoring (conventional pollutant only) |
| 315 | Regional reference site approach |
| 320 | Benthic macroinvertebrate surveys |
Monitoring Levels
| Biological | 4 |
| Habitat | 4 |
| Physical Chemistry | 1 |
| Toxic | 0 |
| Pathogen Indicators | 0 |
| Other Health Indicators | 0 |
| Other Aquatic Life Indicators | 0 |
| # of Bio Sites | 1 |
| BioIntegrity | Fair |
| Causes | Use Support | Cause Magnitude | Sources | Source Magnitude |
|---|---|---|---|---|
| Other habitat alterations | Aquatic Life Support | Moderate |
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| Siltation | Aquatic Life Support | Moderate |
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