Drainage Ditch 71 IA 03-SSK-963
mouth (SE1/4 S11 T86N R24W Hamilton Co.) to confluence of Rahto Brach Ditch and Loop Branch Ditch in SE1/4 SE 1/4 S18 T87N R24W Hamilton Co.
Assessment Comments
Assessment is based on 1997 DNR/UHL bioassessment (Fish IBI= 20 (poor), BM-IBI= 42 (fair)).
Basis for Assessment
Used results of the September 1997 DNR bioassessment approximately 2 miles SSE of Jewell to assess support of the general aquatic life uses as FST due to (1) presence of a moderately diverse fish community (10 species from 3 families) for general use streams in the Des Moines Lobe subecoregion, (2) presence of a majority (8 of 11) of the expected fish taxa for streams in this region, and (3) lack of violations of Class B(LR) WQ criteria in the sample collected during the bioassessment. A fish kill was reported for this stream near Jewell on August 7, 1995. This kill was attributed to natural causes; no other information on this kill is available.
Assessment Key Dates
| 9/1/1997 | Biological Monitoring |
| 8/7/1995 | Fishkill |
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 |
| 140 | Incidence of spills and/or fish kills |
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 | 0 |
| BioIntegrity | N/A |