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
2000
Result Period
1996 - 1998
Designations
Assessment Methodology
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

SUMMARY:  The Class B(LR) aquatic life uses remain assessed as "partially supported."  EXPLANATION:  Continue to use the assessment of support of the Class B(LR) uses developed for the 1998 report (see above).   The results of the November 1994 DNR stream use assessment--upon which the previous assessment of the Class B(LR) uses was based ("partially supported")--are approximately 5 years old and thus can be used to assess current water quality conditions.   As stated in the assessment developed for the 1998 report (see above), habitat conditions (boulders) limited sampling effectiveness for fish, and follow-up monitoring is needed in this stream reach to determine the status of aquatic communities and habitats and to determine the degree to which the Class B(LR) uses may be impaired.   In addition, results of fish sampling may have been influenced by the relatively late sampling date (November).

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