Burr Oak Creek IA 02-CED-581

from County Road T-46 (W line S10 T98N R16W Mitchell Co.) to N line S5 T98 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

2002

Result Period

1998 - 2000

Designations

Assessment Methodology

2002 Methodology Document

Assessment Type

Evaluated

Integrated Report

Category 0

Legacy ADBCode

IA 02-CED-0490_2

Overall Use Support

Threatened

Aquatic Life Use Support

Threatened

Fish Consumption

Not assessed

Documentation

Assessment Comments

Assessment is based on (1) 1999 and 2002 summaries of trout reproduction in Iowa streams and (2) results of 1995 biocriteria sampling: habscr/fshscr = 25/12 (shock).

Basis for Assessment

SUMMARY: The Class B(CW) coldwater aquatic life uses remain assessed as "fully supported / threatened" (minor impacts). Fish consumption uses remain "not assessed." EXPLANATION: Based on the assessment developed for the 2000 report (see above), and based on an updated summary of trout reproduction in Iowa streams prepared by the DNR Fisheries Bureau in April 2002, the Class B(CW) uses remain assessed as "fully supported / threatened." According to the updated summary, this reach of Burr Oak Creek is in the category of Iowa trout streams that exhibit recent, but inconsistent reproductive success and that are generally not capable of maintaining a viable population for the target trout species at this time. Fish consumption uses remain "not assessed" due to lack of fish tissue monitoring in this stream reach.

Monitoring and Methods

Assessment Key Dates

4/16/2002	Fixed Monitoring End Date
9/30/1999	Fixed Monitoring Start Date
8/14/1995	Biological Monitoring

Methods

330	Fish surveys
380	Quan. measurements of instream parms-- channel morphology-- floodplain-- 1-2 seasons-- by prof
120	Surveys of fish and game biologists/other professionals
220	Non-fixed station physical/chemical monitoring (conventional pollutant only)
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	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	Channelization Hydromodification	Not Impairing Not Impairing
Other habitat alterations	Aquatic Life Support	Not Impairing	Channelization Hydromodification	Not Impairing Not Impairing