Assessment Comments
Assessment is based on results of IDNR/UHL biological (biocriteria) monitoring in 2001: FIBI = 44 (fair), 52 (good), BMIBI = 73, 70 (good). FIBI ave = 48, BMIBI ave = 71.5. Non-riffle FIBI BIC = 44 and natural substrate BMIBI BIC = 70.
Basis for Assessment
SUMMARY: The Class B(LR) aquatic life uses are assessed (monitored) as "fully supported" based on results of two IDNR/UHL biological (biocriteria) samplings at the same location in August and October 2001.
EXPLANATION: This assessment was based on biological data collected in 2001 as part of the DNR/UHL stream biocriteria project. The 2001 FIBI scores were 44 (fair) and 52 (good); the BMIBI scores were 73 (good) and 70 (good). The FIBI average was 48 and the BMIBI average was 71.5. The aquatic life use support was assessed as fully supported (=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 non-riffle site FIBI BIC for this ecoregion is 44 and the natural substrate BMIBI BIC for this ecoregion is 70.
