Iowa DNR
Iowa DNR
ADBNet
Water Quality Assessments
Impaired Waters List

East Nishnabotna River IA 05-NSH-1816

from Page/Montgomery Co. line to state Highway 48 bridge approximately 1.5 miles north of Red Oak at east line of S8 T72N R38W Montgomery Co.

Assessment Cycle
1996
Result Period
1992 - 1994
Designations
Assessment Type
Monitored
Integrated Report
Category 0
Legacy ADBCode
IA 05-NSH-0020_3
Overall Use Support
Threatened
Aquatic Life Use Support
Threatened
Fish Consumption
Fully
Documentation
Assessment Comments

Basis for Assessment

Changed assessment of support of the Class B(WW) aquatic life uses developed for the 1994 report (=PS) to FST due to occurrence of reaches within this subsegment that have significantly better habitat quality than the reach downstream.  The entire reach of the E.  Nishnabotna has certainly been impacted by extensive channelization, but the remaining meandered reachs--most of which are in this subsegment--provide the best aquatic habitat quality and recreational experience available in any river reach in the East Nishnabotna basin.  The DNR float trips book (from mid-1980s) states that the reach of the East Nishnabotna from Elliot to south of Red Oak "offers some of the better fish habitat, especially for channel catfish, on the entire river."

Monitoring and Methods
Assessment Key Dates
Methods
260 Fish tissue analysis
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