Green Valley Lake IA 05-PLA-1472
Union County S26T73NR31W 2.5 mi NW of Creston.
Assessment Comments
Basis for Assessment
SUMMARY: The Class A (primary contact recreation uses) were "not assessed." Continued to assess support of the Class B(LW) aquatic life uses as "fully supported / threatened." Class C (drinking water) uses were "not assessed." Fish consumption uses remained assessed as "fully supported." EXPLANATION: The level of support of the Class A (primary contact recreation) uses was changed from "fully supported / threatened" to "not assessed" due to the lack of information on levels of indicator bacteria at this lake. This change in assessment reflects a change in the DNR's Section 305(b) assessment methodology and does not reflect any known change in water quality. The previous (1998) assessment of support of the Class B(LW) uses ("fully supported / threatened") was reviewed and approved by the DNR Fisheries Bureau in 2000. Class C (drinking water) uses remain "not assessed" due to the lack of water quality information upon which to base an assessment. Fish consumption uses remain "fully supported" based on results of EPA/DNR fish tissue (RAFT) monitoring in 1995 (see assessment developed for the 1996 report above).
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) |
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 |