Iowa DNR
Iowa DNR
ADBNet
Water Quality Assessments
Impaired Waters List

East Twin Lake IA 02-IOW-777

Hancock County S29T94NR24W 3 mi. E of Kanawha.

Assessment Cycle
1994
Result Period
1990 - 1992
Designations
Assessment Type
Evaluated
Integrated Report
Category 0
Legacy ADBCode
IA 02-IOW-04040-L_0
Overall Use Support
Threatened
Aquatic Life Use Support
Threatened
Fish Consumption
Not assessed
Documentation
Assessment Comments

Assessment based on reports by IDNR Wildlife Bureau.

Basis for Assessment

Support of the Class B(LW) aquatic life uses was assessed as FST, with siltation from agricultural nonpoint sources believed to threaten the continued support of these uses.

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
Nutrients Overall Use Support Not Impairing
  • Confined Animal Feeding Operations (NPS)
  • Not Impairing
Nutrients Aquatic Life Support Not Impairing
  • Confined Animal Feeding Operations (NPS)
  • Not Impairing
Siltation Overall Use Support Not Impairing
  • Agriculture
  • Not Impairing
Siltation Aquatic Life Support Not Impairing
  • Agriculture
  • Not Impairing