1996 assessment for Bear Creek

Bear Creek IA 02-IOW-702

from confluence with L. Bear Cr. (S16 T80N R13W Poweshiek Co.) to confluence with unnamed tributary in SW 1/4 S9 T80N R14W Poweshiek Co.

This is a Legacy Assessment. Prior to 2004, assessments were developed under a methodology that pre-dated the Integrated Report guidelines.

Assessment Cycle

1996

Result Period

1992 - 1994

Designations

Assessment Type

Monitored

Integrated Report

Category 0

Legacy ADBCode

IA 02-IOW-0180_2

Overall Use Support

Threatened

Aquatic Life Use Support

Threatened

Documentation

Assessment Comments

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

Basis for Assessment

Used results of August 1994 DNR stream use assessment 3 mi NNE of Grinnell to assess support of B(LR) aquatic life uses as FST due to (1) habitat score (23) better than overall median habitat score for DNR stream use assessments from 1990-1995; (2) fish score (13) better than 75th percentile score for assessments made with seines, (3) presence of 12 fish species, with less than half pollution tolerant, (4) comments on field sheet indicating "very rocky hindering effective seining." Field sheet indicates above average habitat and aquatic community for region. Stream segment arbitrarily defined at confluence with L. Bear Cr. due to relatively poor habitat/aquatic life conditions observed downstream.

Monitoring and Methods

Assessment Key Dates

8/1/1994	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	Not Impairing	Bank or Shoreline Modification/Destabilization Hydromodification	Not Impairing Not Impairing