Thayer Lake IA 05-GRA-1369
Union County S22T72NR28W 1 mi SW of Thayer.
Assessment Comments
Assessment is based on results of (1) ISU lake survey in 2000-01, (2) surveys by IDNR Fisheries Bureau, and (3) ISU report on lake plankton communities.
Basis for Assessment
SUMMARY: The Class A (primary contact recreation) uses were "not assessed." The Class B(LW) aquatic life uses were assessed as "partially supported." The fish consumption uses were "not assessed." EXPLANATION: The Class A uses were considered "not assessed" due to the lack of information on levels of indicator bacteria at this lake. At the recommendation of the DNR Fisheries Bureau, the Class B(LW) aquatic life uses were assessed as "partially supported" due to impacts from siltation from the relatively large watershed. Fish consumption uses remained "not assessed" due to the lack of fish tissue monitoring at this lake.
Assessment Key Dates
| 7/23/2001 | Fixed Monitoring End Date |
| 7/17/2000 | Fixed Monitoring Start Date |
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) |
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 |