Iowa DNR
Iowa DNR

ADBNet

Water Quality Assessments
Impaired Waters List

West Fork Little Sioux River IA 06-LSR-1600

from confluence with Mud Cr. (S31 T89N R44W Woodbury Co.) to confluence with unnamed tributary in S3 T91N R42W Cherokee Co.

Assessment Cycle
1998
Result Period
1994 - 1996
Designations
Assessment Type
Monitored
Integrated Report
Category 0
Legacy ADBCode
IA 06-LSR-0130_0
Overall Use Support
Threatened
Aquatic Life Use Support
Threatened
Documentation
Assessment Comments

Assessment is based on results of July 1992, July 1994, and October 1995 IDNR stream use assessments near Moville, Woodbury county.

Basis for Assessment

Upgraded the assessment of support of the Class B(LR) aquatic life uses from PS to FST due to a review of field sheets from DNR stream use assessments in July 1992, July 1994, and October 1995 that shows a fish community in this stream that contains a majority of the expected species/genera typical of Class B(LR) streams in this region.   Results of this review, however, are consistent with the 1996 305(b) assessment that suggests that this is a marginal Class B(LR) stream.   Relative high stream flows during the July 1994 and October 1995 stream use assessments limited the effectiveness of sampling this fish community; thus, additional monitoring is needed to better define the aquatic communities and habitats of this stream.   Despite the continued threats from extensive channelization and frequent streambank erosion, the fish community present in this stream suggests that the Class B(LR) uses are fully supported.

Monitoring and Methods
Assessment Key Dates
Methods
330 Fish surveys
375 Visual observation-- may not quantify some parameters-- single season-- by prof.
Monitoring Levels
Biological 3
Habitat 3
Physical Chemistry 0
Toxic 0
Pathogen Indicators 0
Other Health Indicators 0
Other Aquatic Life Indicators 0
# of Bio Sites 0
BioIntegrity N/A