Bear Creek IA 02-CED-523
mouth (S21 T86N R10W Benton Co.) to confluence with unnamed tributary in SW 1/4 S34 T88N R9W Buchanan Co.
Assessment Comments
1991 SUA: habscrs/fshscrs=22/11, 25/13, 24/11 (seine); 1996 Biocriteria: Fish IBI= 78(excellent), BM-IBI= 76(good).
Basis for Assessment
SUMMARY: The Class B(LR) aquatic life uses remain assessed as "fully supported." The assessment category, however, is changed from "monitored" to "evaluated." EXPLANATION: Continue to use the assessment developed for the 1998 and 2000 reports (see above) that was based on results of the 1996 IDNR biocriteria assessment. However, because these data are now considered too old (greater than five years) to accurately characterize current water quality conditions, the assessment category is changed from "monitored" (indicating an assessment with relatively high confidence) to "evaluated" (indicating an assessment with relatively low confidence).
Assessment Key Dates
| 8/8/1996 | 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 | Very Good |