Iowa DNR
Iowa DNR

ADBNet

Water Quality Assessments
Impaired Waters List

Little Cedar River IA 02-CED-579

from dam of impoundment at Stacyville (SE 1/4 S31 T100N R16W Mitchell Co.) to the Iowa/Minnesota state line at N line S9 T100N R16W Mitchell Co.

Assessment Cycle
2004
Result Period
2000 - 2002
Designations
Assessment Methodology
Assessment Type
Evaluated
Integrated Report
Category 2a
Legacy ADBCode
IA 02-CED-0480_2
Overall Use Support
Threatened
Aquatic Life Use Support
Threatened
Fish Consumption
Not assessed
Documentation
Assessment Comments

Assessment is based on results of three IDNR stream use assessments in August 1995.

Basis for Assessment

SUMMARY:  The Class B(WW) aquatic life uses remain assessed as "fully supported / threatened" (minor impacts) based on results of an IDNR stream use assessment (fish/habitat surveys) in August 1995.   Due to the age of these data, the assessment category is considered "evaluated."   Fish consumption uses remain "not assessed" due to the lack of fish contaminant monitoring in this river segment.  

EXPLANATION:  Continue to use the assessment developed for the 1998, 2000, and 2002 reports that was based on results of the 1995 IDNR stream use assessments of fish species and habitat conditions.   However, because these data are now considered too old (greater than five years) to accurately characterize current water quality conditions, the assessment category is considered "evaluated" (indicating an assessment with relatively low confidence) as opposed to "monitored"  (indicating an assessment with relatively high confidence).   Fish consumption uses remain "not assessed" due to the lack of fish contaminant monitoring in this stream segment.

Monitoring and Methods
Assessment Key Dates
8/1/1995 DNR Stream Use Assessment
Methods
330 Fish surveys
375 Visual observation-- may not quantify some parameters-- single season-- by prof.
Monitoring Levels
Biological 4
Habitat 4
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
Other habitat alterations Aquatic Life Support Not Impairing
  • Bank or Shoreline Modification/Destabilization
  • Pasture grazing - Riparian
  • Not Impairing
  • Not Impairing
Siltation Aquatic Life Support Not Impairing
  • Bank or Shoreline Modification/Destabilization
  • Natural Sources
  • Pasture grazing - Riparian
  • Not Impairing
  • Not Impairing
  • Not Impairing