Ocheyedan River IA 06-LSR-1638

mouth (S13 T96N R37W Clay Co.) to confluence with Little Ocheyedan R. in S28 T98N R39W Osceola Co.

This is a Legacy Assessment. Assessments prior to 2016 were developed under the previous USPEA guidelines, and have a different format.

Assessment Cycle

2004

Result Period

2000 - 2002

Designations

Assessment Methodology

2004 Methodology Document

Assessment Type

Monitored

Integrated Report

Category 1

Legacy ADBCode

IA 06-LSR-0250_0

Overall Use Support

Fully

Aquatic Life Use Support

Fully

Documentation

Assessment Comments

Assessment is based on results of IDNR/UHL monthly ambient city monitoring conducted upstream from Spencer from 2000-02.

Basis for Assessment

SUMMARY: The Class B(LR) aquatic life uses remain assessed (monitored) as "fully supported" based on results of IDNR/UHL monthly ambient chemical/physical water quality monitoring conducted upstream from Spencer at the County Road M-38 bridge southwest of Spencer from January 2000 through December 2002 (STORET station 10210001 (formerly station 924003)).

EXPLANATION: Monitoring at the IDNR/UHL city station upstream from Spencer showed no violations of Class B(LR) water quality criteria during the 2000-2002 assessment period for dissolved oxygen (minimum value = 6.9 mg/l), pH (range = 7.8 to 8.6 units), or ammonia-nitrogen (maximum value = 0.44) in the 35 samples analyzed. In addition, levels of toxic metals in the 29 samples analyzed, and levels of pesticides in the nine samples analyzed, were all below Class B(LR) chronic criteria. These results suggest "full support" of the Class B(LR) aquatic life uses.

Monitoring and Methods

Assessment Key Dates

12/10/2002	Fixed Monitoring End Date
1/11/2000	Fixed Monitoring Start Date

Methods

230	Fixed station physical/chemical (conventional plus toxic pollutants)

Monitoring Levels

Biological	0
Habitat	0
Physical Chemistry	3
Toxic	0
Pathogen Indicators	0
Other Health Indicators	0
Other Aquatic Life Indicators	0
# of Bio Sites	0
BioIntegrity	N/A