Iowa DNR
ADBNet

Water Quality Assessments

Impaired Waters List

Yellow River IA 01-YEL-434

mouth (S34 T96N R3W Allamakee Co.) to County Road X-26 bridge in S24 T96N R5W Allamakee Co.

Assessment Cycle
1998
Result Period
1994 - 1996
Designations
Assessment Type
Monitored
Integrated Report
Category 0
Legacy ADBCode
IA 01-YEL-0070_0
Overall Use Support
Threatened
Aquatic Life Use Support
Threatened
Fish Consumption
Not assessed
Primary Contact Recreation
Not assessed
Documentation
Assessment Comments

Assessment based on results of (1) 1998 DNR Biocriteria sampling: Fish IBI= 63(good), BM-IBI= 67(good), (2) DNR monthly WQ monitoring at Volney, and (3) WQ monitoring at Sny Magill / Bloody run project site near mouth.

Basis for Assessment

Used a review of field notes from the three May 1989 DNR fish surveys conducted in Allamakee County to continue to assess support of the Class B(WW) aquatic life uses as FST due to (1) presence of relatively diverse fish communities at all three locations (species/families, dstr-> upstr:  14/5; 11/3; 19;4) for streams in the Driftless Area ecoregion, (2) presence of a majority of the expected fish taxa at all locations (dstr->upstr:  5 of 9; 5 of 9; 9 of 9) for streams in this region, and (3) presence of above average habitat quality in this river reach.   The expected game fish species--smallmouth bass--was encountered at only the most downstream site sampled (Ion).   The data upon which this assessment is based are more than 5 years old.   Additional monitoring is needed to update this assessment and to determine the status of the aquatic communities and habitats.

Monitoring and Methods
Assessment Key Dates
Methods
150 Monitoring data more than 5 years old
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
Pathogens Overall Use Support Slight
  • Source Unknown
  • Slight
Pathogens Primary Contact Recreation Slight
  • Source Unknown
  • Slight