Iowa DNR

Water Quality Assessments

Impaired Waters List

Turkey River IA 01-TRK-148

mouth (Clayton Co.) to confluence with Volga R. in S26, T92N, R4W, Clayton Co.

Assessment Cycle
Release Status
Result Period
1998 - 2000
Assessment Type
Integrated Report
Category 0
Legacy ADBCode
IA 01-TRK-0200_0
Overall Use Support
Aquatic Life Use Support
Fish Consumption
Assessment Comments

Assessment is based on IDNR monthly WQ monitoring station south of Garber at USGS gage and results of EPA/IDNR fish tissue (RAFT) monitoring in 2000 near Garber.

Basis for Assessment

SUMMARY:  The Class B(WW) aquatic life uses were assessed as "fully supported."  Fish consumption uses were assessed as "fully supported."  Sources of data for this assessment include (1) results monthly monitoring from October 1999 through September 2001 at the IDNR ambient station located at the County Road C43 bridge south of Garber approximately 1 mile downstream from confluence with the Volga River and (2) U.S.  EPA/IDNR fish tissue (RAFT) monitoring in 2000 near Garber.   EXPLANATION:  The Class B(WW) aquatic life uses were assessed as "fully supported" based on results of monthly monitoring from the IDNR ambient station south of Garber.   Monitoring at this station showed no violations of Class B(WW) water quality criteria for conventional pollutants or ammonia in the 24 samples analyzed or for toxic metals in the four samples analyzed during this biennial period.   Fish consumption uses were assessed as "fully supported" based on the 2000 EPA/IDNR fish tissue (RAFT) sampling near Garber.   Results showed very low levels of all contaminants in the samples of fillets from channel catfish and smallmouth bass, with no contaminants approaching either ½ of the respective FDA action levels or DNR levels of concern.

Monitoring and Methods
Assessment Key Dates
9/12/2001 Fixed Monitoring End Date
8/29/2000 Biological Monitoring
10/21/1999 Fixed Monitoring Start Date
230 Fixed station physical/chemical (conventional plus toxic pollutants)
260 Fish tissue analysis
Monitoring Levels
Biological 0
Habitat 0
Physical Chemistry 3
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