Crane Creek IA 01-TRK-213
from confluence with unnamed tributary (NW 1/4 S33 T99N R13W Howard Co.) to confluence with unnamed tributary in S7 T99N R13W Howard Co. approximately 2 miles north of Saratoga.
Assessment Comments
Assessment based on 2000 biocriteria data: Fish IBI= 57 (good), BM-IBI= 53 (fair).
Basis for Assessment
The assessment was based on data collected in 2000 as part of the DNR/UHL stream biocriteria project. The 2000 Fish IBI score was 57 (good) and the BM-IBI score was 53 (fair). The aquatic life use support was assessed as fully supported/threatened (=FST), 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. The biological assessment criteria were determined from a statistical analysis of data collected at stream ecoregion reference sites from 1994-2001.
Assessment Key Dates
| 10/10/2000 | Biological Monitoring |
Methods
| 220 | Non-fixed station physical/chemical monitoring (conventional pollutant only) |
| 315 | Regional reference site approach |
| 320 | Benthic macroinvertebrate surveys |
| 330 | Fish surveys |
| 380 | Quan. measurements of instream parms-- channel morphology-- floodplain-- 1-2 seasons-- by prof |
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 |
|---|---|---|---|---|
| Organic enrichment/Low DO | Overall Use Support | Not Impairing |
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| Other habitat alterations | Overall Use Support | Not Impairing |
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| Unionized Ammonia | Overall Use Support | Not Impairing |
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