Howerdon Creek IA 04-LDM-1110
mouth (S17 T76N R28W Madison Co.) to confluence with unnamed tributary in SW 1/4 S25 T76N R29W Madison Co.
Assessment Comments
Assessment based on 2001 biocriteria data: Fish IBI= 36 (fair), BM-IBI= 70 (good).
Basis for Assessment
Used a review of the field sheet from the September 1992 DNR stream use assessment in Madison County to upgrade the assessment of support of the Class B(LR) aquatic life uses from FST to FS due to (1) presence of a relatively diverse fish community (12 species from 4 families (14 species from 4 families for the 1995 biocriteria sampling)) for streams in the Mississippi River portion of the Southern Iowa Rolling Loess Prairies subecoregion (47f), (2) presence of nearly all the expected fish taxa (7 of 8) for streams in this subecoregion, and (3) presence of high quality physcial characteristics and aquatic habitats in this stream.
Assessment Key Dates
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 |
| Causes | Use Support | Cause Magnitude | Sources | Source Magnitude |
|---|---|---|---|---|
| Other habitat alterations | Overall Use Support | Not Impairing |
|
|
| Other habitat alterations | Aquatic Life Support | Not Impairing |
|
|