Missouri River IA 06-WEM-1715
from confluence with Boyer R. (Pottawattamie Co.) to confluence with Little Sioux R. at river mile 669.2 in Harrison Co.
Assessment Comments
Assessment is based on (1) surveys of Nebraska fisheries biologists, (2) consultation with DNR staff and (3) results of fish tissue (RAFT) monitoring near Little Sioux in 1997.
Basis for Assessment
SUMMARY: The Class A (primary contact recreation) uses remain "not assessed." The Class B(WW) aquatic life uses remain assessed as "partially supported." The fish consumption uses are assessed as "fully supported." EXPLANATION: The Class A uses remain "not assessed" due to the lack of monitoring data for indicator bacteria for this reach of the Missouri River. The Class B(WW) uses remain assessed as "partially supported" based on the assessment developed for the 1998 and 2000 reports (i.e., habitat alterations and flow modifications that resulted from development of the river for navigation uses in the mid-Twentieth Century). This assessment was developed in consultation with the Missouri River fisheries biologist for the state of Nebraska. Fish consumption uses remain assessed as "fully supported" based on EPA/DNR fish tissue (RAFT) monitoring near Little Sioux in Harrison County in 1997 (see assessment for the 2000 report).
Assessment Key Dates
| 9/1/1997 | Fish Tissue Monitoring |
Methods
| 120 | Surveys of fish and game biologists/other professionals |
| 260 | Fish tissue analysis |
Monitoring Levels
| Biological | 0 |
| Habitat | 0 |
| Physical Chemistry | 0 |
| Toxic | 0 |
| Pathogen Indicators | 0 |
| Other Health Indicators | 0 |
| Other Aquatic Life Indicators | 0 |
| # of Bio Sites | 0 |
| BioIntegrity | N/A |
| Causes | Use Support | Cause Magnitude | Sources | Source Magnitude |
|---|---|---|---|---|
| Flow alteration | Overall Use Support | Moderate |
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| Flow alteration | Aquatic Life Support | Moderate |
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| Other habitat alterations | Overall Use Support | Moderate |
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| Other habitat alterations | Aquatic Life Support | Moderate |
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