Brush Creek IA 01-VOL-317
mouth (S26 T93N R7W Fayette Co.) to confluence with Bear Cr. in S8 T92N R7W Fayette Co.
Assessment Comments
Assessment is based on results of IDNR/UHL biological (biocriteria) sampling in 2000: FIBI = 82 (excellent), BMIBI = 66 (good). FIBI BIC = 52, BMIBI BIC = 61.
Basis for Assessment
SUMMARY: The Class B(LR) aquatic life uses are assessed (monitored) as "fully supporting" based on results of IDNR/UHL biological (biocriteria) sampling in 2000.
EXPLANATION: The assessment was based on data collected in 2000 as part of the DNR/UHL stream biocriteria project. The 2000 FIBI score was 82 (excellent) and the BMIBI score was 66 (good). The aquatic life use support was assessed as fully supporting (= FS), based on a comparison of the FIBI and BMIBI scores with biological impairment criteria (BIC) established for previous Section 305(b) reports. The biological impairment criteria were determined from a statistical analysis of data collected at stream ecoregion reference sites from 1994-2004. The FIBI BIC for this ecoregion is 52 and the BMIBI BIC for this ecoregion is 61.
Assessment Key Dates
| 10/3/2000 | Biological Monitoring |
| 10/3/2000 | One-time Chemical 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 | Very Good |