Little Sioux River IA 06-LSR-1577
from confluence with Ocheyedan R. at Spencer (S13 T96N R37W Clay Co.) to confluence with Milford Cr. in NW 1/4 S14 T98N R37W Dickinson Co.
Assessment Comments
Assessment is based IDNR biocriteria sampling and on two IDNR stream use assessments conducted in Dickinson county just downstream from confluence with West Fork Little Sioux River.
Basis for Assessment
Used information gathered during DNR biocriteria sampling near Horseshoe Bend Park to upgrade assessment of support of the Class B(WW) aquatic life uses from PS to FST due to (1) presence of coarse substrates that form riffles, (2) presence of game fish (N. pike, ccat and walleye), and riparian areas that are generally in good shape regarding vegetation. Areas of overpasturing of riparian areas exist, and the continued support of the aquatic life uses are threatened by riparian grazing.
Assessment Key Dates
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 |
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 |