Iowa DNR
Iowa DNR
ADBNet
Water Quality Assessments
Impaired Waters List

Unnamed Creek IA 01-VOL-311

mouth (S33 T93N R6W Clayton Co.) to confuence with unnamed tributary in S29 T93N R6W Clayton Co.

Assessment Cycle
1998
Result Period
1994 - 1996
Designations
Assessment Type
Evaluated
Integrated Report
Category 0
Legacy ADBCode
IA 01-VOL-0104_0
Overall Use Support
Threatened
Aquatic Life Use Support
Threatened
Documentation
Assessment Comments

Stream use assessment in Clayton County.

Basis for Assessment

Upgraded the assessment of support of the Class B(LR) aquatic life uses from PS to FST due to (1) habitat score (23) better than overall median score (22) for DNR stream use assessments from 1990-95, (2) indications on field sheet of very diverse substrates and several pool/riffle sequences, (3) despite difficulty of seining over rocky substrates, the Oct 1991 field sheet shows a fish community of 6 species from two families that approximates the expected B(LR) fish community for this region, including a species (southern redbelly dace) that indicates above average water quality.   Because the data upon which this assessment is based is more than 5 years old, the 305(b) assessment category was changed from "monitored" to "evaluated."  Addtional monitoring is needed to update the assessment and to determine the status of the aquatic communities and habitats of this stream.

Monitoring and Methods
Assessment Key Dates
10/1/1991 DNR Stream Use Assessment
Methods
330 Fish surveys
375 Visual observation-- may not quantify some parameters-- single season-- by prof.
150 Monitoring data more than 5 years old
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