Floyd River IA 06-FLO-1554
from city of Alton (north line S11 T94N R44W Sioux Co.) to confluence with North Fork Floyd R. in S9 T97N R41W O'Brien Co.
Assessment Comments
Assessment is based on results of September 1995 Biocriteria sampling in O'Brien county and a May 1997 fishkill occurrence.
Basis for Assessment
Added one fish kill that was reported 5/17/97; 5,558 fish killed as a result of feedlot runoff. A review of results from the September 1995 DNR biocriteria sampling shows (1) presence of a relatively diverse fish community (14 species from 5 families) for streams in the Northwest Iowa Loess Prairies subecoregion and (2) presence of nearly all the expected fish taxa (8 of 9) for streams in this subregion. Thus, these results support the assessment of support of the Class B(LR) aquatic life uses as FST. Threats remain from feedlot runoff and fish kills.
Assessment Key Dates
| 5/17/1997 | Fishkill |
| 9/5/1995 | 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 | 1 |
| BioIntegrity | Fair |