Iowa DNR
Iowa DNR
ADBNet
Water Quality Assessments
Impaired Waters List

Silver Creek IA 01-MAQ-44

mouth (S8 T86N R3W Jones Co.) to unnamed tributary in S10 T86N R4W Jones Co.

Assessment Cycle
1994
Result Period
1990 - 1992
Designations
Assessment Type
Evaluated
Integrated Report
Category 0
Legacy ADBCode
IA 01-MAQ-0200_0
Overall Use Support
Partial
Aquatic Life Use Support
Partial
Documentation
Assessment Comments

Stream use assessment in Delaware County.

Basis for Assessment

Stream assessment form indicates below average habitat quality.  Very wide and sandy stream bed observed.   Frequent stream bank erosion and isolated cases of channelization and pasture use noted.   Relatively low diversity of fish observed.

Monitoring and Methods
Assessment Key Dates
Methods
120 Surveys of fish and game biologists/other professionals
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
Causes and Sources of Impairment
Causes Use Support Cause Magnitude Sources Source Magnitude
Flow alteration Overall Use Support Moderate
  • Source Unknown
  • Moderate
Flow alteration Aquatic Life Support Moderate
  • Source Unknown
  • Moderate
Nutrients Overall Use Support Moderate
  • Source Unknown
  • Moderate
Nutrients Aquatic Life Support Moderate
  • Source Unknown
  • Moderate
Other habitat alterations Overall Use Support Moderate
  • Source Unknown
  • Moderate
Other habitat alterations Aquatic Life Support Moderate
  • Source Unknown
  • Moderate
Siltation Overall Use Support Moderate
  • Source Unknown
  • Moderate
Siltation Aquatic Life Support Moderate
  • Source Unknown
  • Moderate