Iowa DNR
Iowa DNR
ADBNet
Water Quality Assessments
Impaired Waters List

Shimon Marsh IA 04-RAC-1779

Pocahontas County S9T90NR34W 3 mi SE of Varina.

Assessment Cycle
2000
Result Period
1996 - 1998
Designations
Assessment Methodology
Assessment Type
Evaluated
Integrated Report
Category 0
Legacy ADBCode
IA 04-RAC-01615-L_0
Overall Use Support
Threatened
Aquatic Life Use Support
Threatened
Fish Consumption
Not assessed
Documentation
Assessment Comments

Assessment is based on survey of the DNR Wildlife Bureau.

Basis for Assessment

SUMMARY:  The Class B(LW) aquatic life uses remained assessed as "fully supported / threatened."  EXPLANATION:  The Class B(LW) aquatic life uses remain assessed as "partially supported" based on review and approval of the previous (1998) assessment by the DNR Wildlife Bureau in 2000.   The non-native plant purple loosestrife was identified as a new water quality threat for this wetland.

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
Exotic species Overall Use Support Not Impairing
  • Source Unknown
  • Not Impairing
Exotic species Aquatic Life Support Not Impairing
  • Source Unknown
  • Not Impairing
Siltation Overall Use Support Not Impairing
  • Agriculture
  • Bank or Shoreline Modification/Destabilization
  • Natural Sources
  • Not Impairing
  • Not Impairing
  • Not Impairing
Siltation Aquatic Life Support Not Impairing
  • Agriculture
  • Bank or Shoreline Modification/Destabilization
  • Natural Sources
  • Not Impairing
  • Not Impairing
  • Not Impairing