Iowa DNR
Iowa DNR
ADBNet
Water Quality Assessments
Impaired Waters List

Silver Creek IA 01-WPS-363

from Crystal Cr. (aka Clear Cr.) (S23 T81N R3E Clinton Co.) to confluence with Negro Cr. in S27 T82N R3E Clinton Co.

Assessment Cycle
1998
Result Period
1994 - 1996
Designations
Assessment Type
Monitored
Integrated Report
Category 0
Legacy ADBCode
IA 01-WPS-0070_2
Overall Use Support
Threatened
Aquatic Life Use Support
Threatened
Documentation
Assessment Comments

Assessment is based on results of 1997 DNR Fisheries Bureau survey in DeWitt city park.

Basis for Assessment

Used a review of results from the August 1997 fish survey by the DNR Fisheries Bureau in Clinton County (S13, T81N, R13W) to assess support of the Class B(LR) aquatic life uses as FST due to (1) presence of a moderately diverse fish community (11 species from 4 families) for the Southern Iowa Rolling Loess Prairies subecoregion (47f), (2) presence of a majority of the expected fish taxa (6 of 9) for streams in this subregion, and (3) indications of good quality aquatic habitats.

Monitoring and Methods
Assessment Key Dates
8/1/1997 Biological Monitoring
Methods
330 Fish surveys
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