Iowa DNR
Iowa DNR
ADBNet
Water Quality Assessments
Impaired Waters List

West Branch Buttrick Creek IA 04-RAC-1151

mouth (W25 T84N R30W Greene Co.) to confluence with DD-52 in SE 1/4 S16 T86N R30W Webster Co.

Assessment Cycle
2002
Result Period
1998 - 2000
Designations
Assessment Methodology
Assessment Type
Monitored
Integrated Report
Category 0
Legacy ADBCode
IA 04-RAC-0080_0
Overall Use Support
Fully
Aquatic Life Use Support
Fully
Fish Consumption
Not assessed
Documentation
Assessment Comments

Assessment based on 2001 biocriteria data: Fish IBI= 62 (good), BM-IBI= 73 (good).

Basis for Assessment

The assessment was based on data collected in 2001 as part of the DNR/UHL stream biocriteria project.  The 2001 Fish IBI score was 62 (good) and the BM-IBI score was 73 (good).  The aquatic life use support was assessed as fully supporting (=FS), based on a comparison of the F-IBI and BM-IBI scores with biological assessment criteria established specifically for the 2002 Section 305(b) report.  The biological assessment criteria were determined from a statistical analysis of data collected at stream ecoregion reference sites from 1994-2001.

Monitoring and Methods
Assessment Key Dates
7/23/2001 Biological Monitoring
Methods
330 Fish surveys
380 Quan. measurements of instream parms-- channel morphology-- floodplain-- 1-2 seasons-- by prof
220 Non-fixed station physical/chemical monitoring (conventional pollutant only)
315 Regional reference site approach
320 Benthic macroinvertebrate surveys
Monitoring Levels
Biological 4
Habitat 4
Physical Chemistry 1
Toxic 0
Pathogen Indicators 0
Other Health Indicators 0
Other Aquatic Life Indicators 0
# of Bio Sites 1
BioIntegrity Good