South Beaver Creek IA 02-CED-561

mouth (S25 T90N R17W Butler Co.) to confluence with Middle Fork South Beaver Cr. in S28T89R17W Grundy Co.

This is a Legacy Assessment. Assessments prior to 2016 were developed under the previous USPEA guidelines, and have a different format.

Assessment Cycle

2004

Result Period

2000 - 2002

Designations

Assessment Methodology

2004 Methodology Document

Assessment Type

Monitored

Integrated Report

Category 1

Legacy ADBCode

IA 02-CED-0430_1

Overall Use Support

Threatened

Aquatic Life Use Support

Threatened

Documentation

Assessment Comments

Assessment based on results of IDNR/UHL biological (biocriteria) monitoring in 2001: Fish IBI= 44 (fair), BM-IBI= 73 (good).

Basis for Assessment

SUMMARY: The Class B(LR) aquatic life uses are assessed (monitored) as "fully supported / threatened" (minor impacts) based on results of IDNR/UHL biological (biocriteria) sampling in 1999. This is the same assessment as that developed for the 2002 reporting cycle.

EXPLANATION: The assessment was based on data collected in 2001 as part of the DNR/UHL stream biocriteria project. The 2001 Fish IBI score was 44 (fair) and the BM-IBI score was 73 (good). The aquatic life use support was assessed as fully supporting/threatened (=FST), 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

8/13/2001	Biological Monitoring
8/13/2001	One-time Chemical 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	Fair

Causes and Sources of Impairment

Causes	Use Support	Cause Magnitude	Sources	Source Magnitude
Nutrients	Aquatic Life Support	Not Impairing	Agriculture Channelization Crop-related Sources Grazing related Sources Habitat Modification (other than Hydromodification) Hydromodification Pasture grazing - Riparian Removal of Riparian Vegetation	Not Impairing Not Impairing Not Impairing Not Impairing Not Impairing Not Impairing Not Impairing Not Impairing
Other habitat alterations	Aquatic Life Support	Not Impairing	Agriculture Bank or Shoreline Modification/Destabilization Channelization Crop-related Sources Grazing related Sources Habitat Modification (other than Hydromodification) Hydromodification Pasture grazing - Riparian Removal of Riparian Vegetation	Not Impairing Not Impairing Not Impairing Not Impairing Not Impairing Not Impairing Not Impairing Not Impairing Not Impairing
Siltation	Aquatic Life Support	Not Impairing	Agriculture Bank or Shoreline Modification/Destabilization Channelization Crop-related Sources Grazing related Sources Habitat Modification (other than Hydromodification) Pasture grazing - Riparian Removal of Riparian Vegetation	Not Impairing Not Impairing Not Impairing Not Impairing Not Impairing Not Impairing Not Impairing Not Impairing