Willow Creek IA 06-LSR-1611
mouth (S30 T90N R41W Cherokee Co.) to confluence with unnamed tributary in N 1/2 S31 T91N R41W Cherokee Co.
Assessment Comments
Assessment is based on results of IDNR/UHL biological (biocriteria) monitoring in 2001: FIBI = 51 (good), BMIBI = 62 (good). FIBI BIC = 43, BMIBI BIC = 54.
Basis for Assessment
SUMMARY: The Class B(LR) aquatic life uses are assessed (monitored) as "fully supported" based on results of IDNR/UHL biological (biocriteria) sampling in 2001. This is the same assessment as the 2004 cycle.
EXPLANATION: This assessment was based on data collected in 2001 as part of the DNR/UHL stream biocriteria project. The FIBI score was 51 (good) and the BMIBI score was 63 (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 43 and the BMIBI BIC for this ecoregion is 54.
Assessment Key Dates
| 8/14/2001 | Biological Monitoring |
| 8/14/2001 | One-time Chemical Monitoring |
Methods
| 320 | Benthic macroinvertebrate surveys |
| 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 |
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 | Good |