Winnebago River IA 02-WIN-826

mouth (Floyd Co.) to confluence with Calmus Cr. at Mason City in S34 T97N R20W Cerro Gordo Co.

This is a Legacy Assessment. Prior to 2004, assessments were developed under a methodology that pre-dated the Integrated Report guidelines.

Assessment Cycle

1996

Result Period

1992 - 1994

Designations

Assessment Type

Monitored

Integrated Report

Category 0

Legacy ADBCode

IA 02-WIN-0010_1

Overall Use Support

Threatened

Aquatic Life Use Support

Threatened

Fish Consumption

Not assessed

Documentation

Assessment Comments

Assessment is based on two water quality studies conducted for Lehigh Cement Co. in 1994-95.

Basis for Assessment

Used results of two studies conducted by UHL for Lehigh Portland Cement Co. of Mason City in 1994 and 1995 to determine whether the LPCC outfall was affecting WQ or aquatic life in the Winnebago River. Both studies involved sampling for water quality, benthic invertebrates, and fish both upstream and downstream from the LPCC outfall. Results of both studies show no violations of Class B(WW) aquatic life water quality criteira and show relatively diverse communities of benthic macroinvertebrates and fish. Although conducted just upstream from confluence with Calmus Creek, results of these studies were used to assess this lowest subsegment of the Winnebago River.