Middle Nodaway River IA 05-NOD-1400

from confluence with West Fork Middle Nodaway R. (S33 T74N R33W Adair Co.) to confluence with unnamed tributary in S1 T75N R32W Adair 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 5b

Legacy ADBCode

IA 05-NOD-0070_0

Overall Use Support

Not supporting

Aquatic Life Use Support

Not supporting

Documentation

Assessment Comments

Assessment is based on results of IDNR/UHL biological (biocriteria) monitoring in 1998: Fish IBI= 19(poor), BM-IBI= 44(fair).

Basis for Assessment

SUMMARY: The Class B(LR) aquatic life uses remain assessed (monitored) as "not supported" based on results of IDNR/UHL biological (biocriteria) sampling in 1998. This is the same assessment as that developed for the 2002 reporting cycle.

EXPLANATION: The assessment was based on the 1998 IDNR/UHL biological assessment data (see 2000 assessment comments), and the aquatic life use support continued to be assessed as not supporting (=NS), 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 F-IBI score was 19 (poor) and the BM-IBI score was 44 (fair). 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

10/21/1998	Biological Monitoring
10/21/1998	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	Poor

Causes and Sources of Impairment

Causes	Use Support	Cause Magnitude	Sources	Source Magnitude
Other habitat alterations	Aquatic Life Support	High	Agriculture Bank or Shoreline Modification/Destabilization Channelization Habitat Modification (other than Hydromodification) Hydromodification	Moderate Moderate High Moderate Moderate
Organic enrichment/Low DO	Aquatic Life Support	Moderate	Agriculture	Moderate
Siltation	Aquatic Life Support	Moderate	Agriculture Bank or Shoreline Modification/Destabilization Channelization Habitat Modification (other than Hydromodification) Hydromodification	Moderate Moderate High Moderate Moderate
Turbidity	Aquatic Life Support	Moderate	Agriculture Bank or Shoreline Modification/Destabilization Channelization Habitat Modification (other than Hydromodification) Hydromodification	Moderate Moderate High Moderate Moderate