Plum Creek IA 04-EDM-982
mouth (S17 T96N R28W Kossuth Co.) to confluence with unnamed tributary in S16 T96N R27W Kossuth Co.
Assessment Comments
Habscr/fshscr: 25/11 (seine) (fish score corrected due to error in scoring % pollution tolerant species); 1997 Biocriteria: Fish IBI=31 (fair), BM-IBI=75 (good).
Basis for Assessment
Used results of the August 1997 DNR biocriteria sampling approx. 7 miles NE of Algona to update the 1996 assessment of support of the Class B(LR) aquatic life uses. Based on results of the biocriteria sampling, continue to assess support of the Class B(LR) uses as FST due to (1) presence of a moderately diverse fish community (15 species from 6 families), (2) presence of a majority of the expected fish taxa (7 of 11) for streams in the Des Moines Lobe subecoregion, and (3) lack of violations of Class B(LR) WQ criteria in the sample collected during biocriteria sampling. Threats to full support are those identified in the assessment developed for the 1996 Section 305(b) report.
Assessment Key Dates
| 8/12/1997 | 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 | Overall Use Support | Not Impairing |
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| Other habitat alterations | Aquatic Life Support | Not Impairing |
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