Shell Rock River IA 02-SHL-786
from confluence with the Winnebago River (Floyd Co.) to confluence with Rose Cr. in NW 1/4 S8 T97N R18W 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-SHL-0020_1
Overall Use Support
Partial
Aquatic Life Use Support
Threatened
Fish Consumption
Not assessed
Primary Contact Recreation
Partial
Documentation
Assessment Comments
Assessment is based on results of water quality monitoring.
Basis for Assessment
Had no violations of Class B WQC. Four of the six samples collected during 1994 exceeded the Class A WQC. Due to lack of sufficient data to meet completeness criteria (i.e., 10 non flow-affected samples over the biennial period), assessed support of Class A uses as PS; assessed support of Class B(WW) uses as FST due to known threats from agricultural nonpoint sources.
Monitoring and Methods
Assessment Key Dates
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 |
Causes and Sources of Impairment
| Causes | Use Support | Cause Magnitude | Sources | Source Magnitude |
|---|---|---|---|---|
| Algal Grwth/Chlorophyll a | Overall Use Support | Not Impairing |
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