Iowa DNR
Iowa DNR
ADBNet
Water Quality Assessments
Impaired Waters List

Elk Creek IA 02-SHL-798

mouth to east line of S13 T99N R22W Worth Co.

Assessment Cycle
1996
Result Period
1992 - 1994
Designations
Assessment Type
Monitored
Integrated Report
Category 0
Legacy ADBCode
IA 02-SHL-0030_0
Overall Use Support
Partial
Aquatic Life Use Support
Partial
Documentation
Assessment Comments

Assessment is based on results of a DNR stream use assessment in November 1994.

Basis for Assessment

Used results of the November 1994 DNR stream use assessment to assess support of the Class B(LR) aquatic life uses as PS due to (1) habitat score (21) less than the overall median score (22) for DNR stream use assessments, (2) fish score (7) worse than the 75th percentile score (10) for stream assessments made with seines (although the field sheet notes that large boulders and muck hindered effective seining), and (3) indications on field sheet of little substrate diversity, few pool/riffle sequences, and frequent channel alterations due to over pasturing.

Monitoring and Methods
Assessment Key Dates
11/1/1994 DNR Stream Use Assessment
Methods
330 Fish surveys
375 Visual observation-- may not quantify some parameters-- single season-- by prof.
Monitoring Levels
Biological 2
Habitat 3
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 Overall Use Support Moderate
  • Pasture grazing - Riparian
  • Moderate
Other habitat alterations Aquatic Life Support Moderate
  • Pasture grazing - Riparian
  • Moderate