Bear Creek IA 01-MAQ-34

from Beers Cr. (Jackson Co.) to confluence with unnamed tributary in W1/2 S28T84NR2W Jones 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 01-MAQ-0140_2

Overall Use Support

Threatened

Aquatic Life Use Support

Threatened

Documentation

Assessment Comments

Assessment is based on results of IDNR/UHL biocriteria sampling in 1997 (Fish IBI= 55(good), BM-IBI= 59(good)).

Basis for Assessment

SUMMARY: The Class B(LR) aquatic life uses were assessed (monitored) as "fully supported / threatened" based on results of IDNR/UHL biological monitoring conducted in September 1997 as part of the IDNR stream biocriteria project. This assessment is the same as that developed for the 2000 and 2002 reporting cycles.

EXPLANATION: This assessment was based on the 1997 biological data. The aquatic life use support continued to be assessed as fully supported / threatened (=FST), based on a comparison of the F-IBI and BM-IBI scores (Fish IBI= 55(good), BM-IBI= 59(good)) 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

9/3/1997	Biological Monitoring

Methods

220	Non-fixed station physical/chemical monitoring (conventional pollutant only)
315	Regional reference site approach
320	Benthic macroinvertebrate surveys
330	Fish surveys
380	Quan. measurements of instream parms-- channel morphology-- floodplain-- 1-2 seasons-- by prof

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

Causes and Sources of Impairment

Causes	Use Support	Cause Magnitude	Sources	Source Magnitude
Other habitat alterations	Aquatic Life Support	Not Impairing	Agriculture Bank or Shoreline Modification/Destabilization Channelization Habitat Modification (other than Hydromodification) Hydromodification	Not Impairing Not Impairing Not Impairing Not Impairing Not Impairing
Siltation	Aquatic Life Support	Not Impairing	Agriculture Bank or Shoreline Modification/Destabilization Channelization Habitat Modification (other than Hydromodification) Hydromodification	Not Impairing Not Impairing Not Impairing Not Impairing Not Impairing