Hawthorn Lake IA 03-NSK-862
Mahaska County S10T77NR14W 1 mi S of Barnes City.
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
Trophic
Eutrophic
Trend
Stable
Legacy ADBCode
IA 03-NSK-00250-L_0
Overall Use Support
Threatened
Aquatic Life Use Support
Threatened
Fish Consumption
Fully
Primary Contact Recreation
Not assessed
Documentation
Assessment Comments
Assessment is based on results of water quality monitoring, RAFT sampling, and surveys by IDNR Fisheries Bureau.
Basis for Assessment
Used assessment of support of the Class B(LW) aquatic life uses developed for the 1994 report (=FST). Used results of fish contaminant monitoring conducted for the DNR/EPA Regional Ambient Fish Tissue (RAFT) monitoring program to assess support of fish consumption uses as FS due to levels of all contaminants less than 1/2 of FDA action levels in the composite samples of channel catfish and largemouth bass fillets.
Monitoring and Methods
Assessment Key Dates
Methods
| 340 | Primary producer surveys (phytoplankton/periphyton/macrophyton) |
| 120 | Surveys of fish and game biologists/other professionals |
| 222 | Non-fixed-station monitoring (conventional during key seasons and flows) |
| 260 | Fish tissue analysis |
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 |