Mississippi River IA 01-NEM-77
from Wisconsin R. near McGregor (Clayton Co.) to Lock & Dam 9 near Harpers Ferry Allamakee Co.
Assessment Comments
Assessment is based on special monitoring conducted in summers of 1997 and 1998 by Wisconsin DNR.
Basis for Assessment
SUMMARY: The Class A (primary contact recreation) uses remain "not assessed." The Class B(WW) aquatic life uses remain assessed as "fully supporting / threatened." Fish consumption uses remain "not assessed." EXPLANATION: The Class A uses were not assessed due to lack of information on levels of indicator bacteria in this reach of river. The Class B(WW) uses remain assessed as "fully supporting / threatened" based on the 1997 study of dissolved oxygen levels by Sullivan and Endris (1998) of the Wisconsin DNR (see assessment for the 1998 report above). Fish consumption uses remain "not assessed" due to lack of recent fish tissue monitoring in this river reach.
Assessment Key Dates
| 8/1/1997 | Fixed Monitoring End Date |
| 6/1/1997 | Fixed Monitoring Start Date |
Methods
| 220 | Non-fixed station physical/chemical monitoring (conventional pollutant only) |
Monitoring Levels
| Biological | 0 |
| Habitat | 0 |
| Physical Chemistry | 4 |
| 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 |
|---|---|---|---|---|
| Organic enrichment/Low DO | Overall Use Support | Not Impairing |
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| Organic enrichment/Low DO | Aquatic Life Support | Not Impairing |
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