Bear Creek IA 03-SSK-959
from north line of S32 T85N R23W (Story Co.) to confluence with unnamed tributary in NE 1/4 S23 T86N R23W Hamilton Co.
Assessment Comments
1997 bioassessments (spp./fam.): dstr Roland WWTP, 12/4; upstr Roland WWTP, 11/4. 1997 Biocriteria: upstream/downstream Fish IBI= 25(poor)/35(fair), BM-IBI= 58(good)/44(fair).
Basis for Assessment
Used results of the the two September 1997 DNR bioassessments downstream and upstream from the Roland wastewater treatment facility to assess support of the general uses as FST due to (1) a moderately diverse fish community for streams of the Des Moines Lobe ecoregion, (2) presence of a majority of the expected fish taxa for streams in this subecoregion (8 of 11 dstr from WWTP; 7 of 11 usptr from WWTP), and (3) lack of violations of Class B(LR) WQ criteria in samples collected during the bioassessments.
Assessment Key Dates
| 9/25/1997 | Biological Monitoring |
Methods
| 330 | Fish surveys |
| 380 | Quan. measurements of instream parms-- channel morphology-- floodplain-- 1-2 seasons-- by prof |
| 140 | Incidence of spills and/or fish kills |
| 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 | 2 |
| BioIntegrity | Fair |