Iowa DNR
Iowa DNR
ADBNet
Water Quality Assessments
Impaired Waters List

Clear Lake Marsh IA 02-WIN-838

Cerro Gordo County S6T96NR21W at N edge of Clear Lake

Assessment Cycle
2000
Result Period
1996 - 1998
Designations
Assessment Methodology
Assessment Type
Evaluated
Integrated Report
Category 0
Legacy ADBCode
IA 02-WIN-00370-L_0
Overall Use Support
Not supporting
Aquatic Life Use Support
Not supporting
Fish Consumption
Not assessed
Documentation
Assessment Comments

Assessment based on surveys by IDNR Wildlife Bureau.

Basis for Assessment

SUMMARY:  Continued to assess support of the Class B(LW) aquatic life uses as "not supported."  Other beneficial uses remain "not assessed."  EXPLANATION:  The previous (1998) assessment of support of the Class B(LW) uses ("not supported") was reviewed and approved by the DNR Wildlife Bureau in 2000.

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 High
  • Agriculture
  • Flow Regulation/Modification
  • Natural Sources
  • High
  • Moderate
  • Slight
Siltation Aquatic Life Support High
  • Agriculture
  • Flow Regulation/Modification
  • Natural Sources
  • High
  • Moderate
  • Slight