Green Valley Lake IA 05-PLA-1472
Union County S26T73NR31W 2.5 mi NW of Creston.
Assessment Comments
Basis for Assessment
Used assessments of support of the Class A (primary contact) uses (=FST) and Class B(LW) aquatic life uses (=FST) developed for the 1994 report. In addtion, used info from a 1990-94 Phase III Cleans Lakes study (Hoyman and Conover 1995) to update the assessment of aquatic life uses. Report shows that implementation of agricultural BMPs in the lake watershed and construction of sedimentation dikes at lake inlets has reduced the amount of sediment and nutrients reaching the lake and has thus improved water quality. Report states that macrophyte biomass has increased and that WQ will likely continue to improve. The assessment of B(LW) uses as FST is appropriate. Also used results of fish contaminant monitoring conducted for the 1995 RAFT program to assess support of fish consumption uses as FS due to all levels of contaminants in composite samples of channel catfish and white crappie < 1/2 all FDA action levels.
Assessment Key Dates
Methods
| 340 | Primary producer surveys (phytoplankton/periphyton/macrophyton) |
| 420 | Water column surveys (e.g. fecal coliform) |
| 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 | 0 |
| Toxic | 0 |
| Pathogen Indicators | 0 |
| Other Health Indicators | 0 |
| Other Aquatic Life Indicators | 0 |
| # of Bio Sites | 0 |
| BioIntegrity | N/A |