Coralville Reservoir IA 02-IOW-630
Johnson County S22T80NR6W (dam) 3 mi N of Iowa City.
This is a Legacy Assessment. Prior to 2004, assessments were developed under a methodology that pre-dated the Integrated Report guidelines.
Assessment Cycle
1994
Result Period
1990 - 1992
Designations
Assessment Type
Monitored
Integrated Report
Category 0
Trophic
Eutrophic
Trend
Stable
Legacy ADBCode
IA 02-IOW-0040-L_0
Overall Use Support
Threatened
Aquatic Life Use Support
Threatened
Fish Consumption
Not assessed
Primary Contact Recreation
Fully
Documentation
Assessment Comments
Assessment is based on water quality monitoring.
Basis for Assessment
No violations of Class B(WW) WQC or Class A WQC at the WQ monitoring station at Mahaffey Br. Did, however, have violations of Class A WQC at swimming beaches: using data from page 48 of 1992 annual report (only data available), had a total of 27 sampling events at three beaches in 1992. If data from samples collected during runoff periods are removed, only 1 of 15 sampling events had samples with levels of fecals > Class A WQC (=6% violation = FS). All fish contams < 1/2 FDA levels (=FS). Aquatic life (and Class A) uses of reservoir are threatened by sediment delivered in ag. NPS.
Monitoring and Methods
Assessment Key Dates
Methods
| 420 | Water column surveys (e.g. fecal coliform) |
| 230 | Fixed station physical/chemical (conventional plus toxic pollutants) |
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 |