Burr Oak Creek IA 02-CED-580

mouth (S12 T98N R16W Mitchell Co.) to Mitchell County Road T46 at W line S10 T98N R16W Mitchell 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-CED-0490_1

Overall Use Support

Partial

Aquatic Life Use Support

Partial

Documentation

Assessment Comments

Assessment is based on results of two stream use assessments in 1992 and 1994.

Basis for Assessment

Used results of two DNR stream use assessments conducted in Section 12, T98N, R16W in 1992 and 1994 to assess support of the B(LR) aquatic life uses as PS due to (1) habitat scores (both 20) worse than the overall average score (22) for DNR stream use assessments, (2) field notes that indicate frequent channel alterations and unstable streambanks due to excessive pasturing of cattle, and (3) field notes indicating substrates dominated by fines ("lot of muck/mud catching in net").

Monitoring and Methods

Assessment Key Dates

11/1/1994	DNR Stream Use Assessment
6/1/1992	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	Bank or Shoreline Modification/Destabilization Pasture grazing - Riparian	Moderate Moderate
Other habitat alterations	Aquatic Life Support	Moderate	Bank or Shoreline Modification/Destabilization Pasture grazing - Riparian	Moderate Moderate