Des Moines River IA 04-LDM-1012
from confluence with Cedar Cr. (S33 T75N R17W Mahaska Co.) to dam of Red Rock Reservoir in S19 T76N R18W Marion Co.
This is a Legacy Assessment. Prior to 2004, assessments were developed under a methodology that pre-dated the Integrated Report guidelines.
Assessment Cycle
1994
Result Period
1990 - 1992
Designations
Assessment Type
Monitored
Integrated Report
Category 0
Legacy ADBCode
IA 04-LDM-0020_3
Overall Use Support
Partial
Aquatic Life Use Support
Partial
Fish Consumption
Not assessed
Primary Contact Recreation
Threatened
Documentation
Assessment Comments
Basis for Assessment
Had no violations of Class A WQC for fecals in 7 samples collected at approx average flows; assess Class A supp as FST. Although no Class B WQC were exceeded, thesis by Lutz (1993) documents impairments to fish community due to supersaturation of dissolved gasses as seen in frequent fish kills and in examination of fish. Due to continued high use of area by fisherman, assessed support of Class B uses as PS. Lutz notes that source of supersaturation is unknown but that operat. of dam is an important factor. No viols at DNR quarterly station.