Little Maple River IA 06-LSR-1596
mouth (SW 1/4 S34 T90N R39W Ida Co.) to confluence with unnamed tributary in NE 1/4 S20 T90N R38W Buena Vista Co.
Assessment Comments
Assessment is based on results of 1997 Biocriteria sampling: Fish IBI=39 (fair), BM-IBI=69 (good).
Basis for Assessment
Used results of the August 1997 DNR bioassessment 4.5 mi N of Galva to upgrade the assessment of support of the Class B(LR) aquatic life uses from PS to FST due to (1) presence of a moderately diverse fish community (10 species, 4 families) for streams in the Northwest Iowa Loess Prairies subecoregion, (2) presence of a majority of the expected fish taxa (7 of 9) for streams in this subecoregion, and (3) lack of violations of Class B(LR) WQ criteria in the sample collected during the bioassessment. Threats to the continued support of the Class B(LR) uses are those identified in the assessment developed for the 1994 report.
Assessment Key Dates
| 8/20/1997 | 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 | Fair |