Maple River IA 06-LSR-1585
from confluence with Odebolt Cr. (NE 1/4 S15 T87N R40W Ida Co.) to confluence with Silver Cr. in S13 T88N R40W Ida Co.
Assessment Comments
Assessment is based on result of 1997 bioassessment: fish 14 spp., 4 fams.; Fish IBI= 38(fair), BM-IBI (2 sites) = 69(good) 66(good).
Basis for Assessment
SUMMARY: The Class B(WW) aquatic life uses remain assessed as "fully supported / threatened" (minor impacts). Fish consumption uses remain "not assessed." EXPLANATION: The Class B(WW) aquatic life uses remain assessed as "fully supported / threatened" based on results of the biological assessmentconducted by IDNR/UHL on this stream segment in 1997 (see assessment for the 2000 report). These data are less than five years old and, according to IDNR's methodology for Section 305(b) assessments, are thus appropriate for characterizing current water quality conditions. Fish consumption uses remain "not assessed" due to the lack of fish contaminant monitoring in this stream segment.
Assessment Key Dates
| 8/14/1997 | 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 | 4 |
| 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 |
|
|