Iowa DNR
Iowa DNR
ADBNet
Water Quality Assessments
Impaired Waters List

Walnut Creek Marsh IA 05-GRA-1384

Ringgold County S17T68NR30W 4 mi WSW of Mount Ayr.

Assessment Cycle
1994
Result Period
1990 - 1992
Designations
Assessment Type
Evaluated
Integrated Report
Category 0
Legacy ADBCode
IA 05-GRA-01950-L_0
Overall Use Support
Partial
Aquatic Life Use Support
Partial
Fish Consumption
Not assessed
Documentation
Assessment Comments

Assessment based on surveys by IDNR Wildlife Bureau.

Basis for Assessment

Used the assessment of support of the Class B(LW) aquatic life uses developed for the 1992 report (=PS).

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 Moderate
  • Agriculture
  • Natural Sources
  • Moderate
  • Slight
Nutrients Aquatic Life Support Moderate
  • Agriculture
  • Natural Sources
  • Moderate
  • Slight
Siltation Overall Use Support Moderate
  • Agriculture
  • Natural Sources
  • Moderate
  • Slight
Siltation Aquatic Life Support Moderate
  • Agriculture
  • Natural Sources
  • Moderate
  • Slight
Exotic species Overall Use Support Not Impairing
  • Source Unknown
  • Not Impairing
Exotic species Aquatic Life Support Not Impairing
  • Source Unknown
  • Not Impairing