Iowa DNR
Iowa DNR
ADBNet
Water Quality Assessments
Impaired Waters List

Willow Slough IA 05-NSH-1443

Mills County S29T73NR40W 3 mi. SW of Henderson.

Assessment Cycle
1994
Result Period
1990 - 1992
Designations
Assessment Type
Evaluated
Integrated Report
Category 0
Legacy ADBCode
IA 05-NSH-00820-L_0
Overall Use Support
Partial
Aquatic Life Use Support
Partial
Fish Consumption
Not assessed
Documentation
Assessment Comments

Assessment is based on surveys of the DNR Wildlife Bureau.

Basis for Assessment

Support of the Class B(LW) aquatic life uses was assessed as PS due to impacts from siltation from agricultural nonpoint sources.

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
Siltation Overall Use Support Not Impairing
  • Agriculture
  • Natural Sources
  • Not Impairing
  • Not Impairing
Siltation Aquatic Life Support Not Impairing
  • Agriculture
  • Natural Sources
  • Not Impairing
  • Not Impairing