North Fork Maquoketa River IA 01-NMQ-91

confluence with Bear Cr (S31 T89NR2W Dubuque Co.) to confluence with unnamed tributary in S18 T90N R1W Dubuque 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 01-NMQ-0020_2

Overall Use Support

Partial

Aquatic Life Use Support

Partial

Documentation

Assessment Comments

Stream use assessment in Dubuque County and fish kill near Dyersville.

Basis for Assessment

Used assessment of aquatic life use support developed for the 1994 report (PS). Review of field sheet shows that habitat score is average (but at low end of FST streams), and that seining was hindered by "very good growth of aquatic veg., duckweed, watercress, and rush." In addition, fish kills were reported in the vicinity of New Wine Park north of Dyersville in June 1995 and August 1996 with no source/cause of the kill indentified. Thus, maintain assessment as PS.

Monitoring and Methods

Assessment Key Dates

Methods

360	HABITAT ASSESSMENT
330	Fish surveys

Monitoring Levels

Biological	0
Habitat	0
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
Organic enrichment/Low DO	Overall Use Support	Moderate	Agriculture Municipal Point Sources	Moderate Moderate
Organic enrichment/Low DO	Aquatic Life Support	Moderate	Agriculture Municipal Point Sources	Moderate Moderate
Other habitat alterations	Overall Use Support	Moderate	Agriculture Habitat Modification (other than Hydromodification) Removal of Riparian Vegetation	Moderate Moderate Moderate
Other habitat alterations	Aquatic Life Support	Moderate	Agriculture Habitat Modification (other than Hydromodification) Removal of Riparian Vegetation	Moderate Moderate Moderate
Siltation	Overall Use Support	Moderate	Agriculture Habitat Modification (other than Hydromodification)	Moderate Moderate
Siltation	Aquatic Life Support	Moderate	Agriculture Habitat Modification (other than Hydromodification)	Moderate Moderate
Unionized Ammonia	Overall Use Support	Not Impairing	Source Unknown	Not Impairing
Unionized Ammonia	Aquatic Life Support	Not Impairing	Source Unknown	Not Impairing