Mississippi River IA 01-NEM-77

from Wisconsin R. near McGregor (Clayton Co.) to Lock & Dam 9 near Harpers Ferry Allamakee Co.

This is a Legacy Assessment. Prior to 2004, assessments were developed under a methodology that pre-dated the Integrated Report guidelines.

Assessment Cycle

2002

Result Period

1998 - 2000

Designations

Assessment Methodology

2002 Methodology Document

Assessment Type

Monitored

Integrated Report

Category 0

Legacy ADBCode

IA 01-NEM-0040_1

Overall Use Support

Threatened

Aquatic Life Use Support

Threatened

Fish Consumption

Not assessed

Primary Contact Recreation

Not assessed

Documentation

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." The source of data used for this assessment is Sullivan and Endris (1998). 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.

Monitoring and Methods

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 and Sources of Impairment

Causes	Use Support	Cause Magnitude	Sources	Source Magnitude
Organic enrichment/Low DO	Overall Use Support	Not Impairing	Natural Sources Other	Not Impairing Not Impairing
Organic enrichment/Low DO	Aquatic Life Support	Not Impairing	Natural Sources Other	Not Impairing Not Impairing