Markert 7
Status not reported Unknown well
| API number | 12-009-21074 |
|---|---|
| Operator | Calhoun Research & Development |
| County | Brown, Illinois |
| Permitted | 1983-02-02 |
| Completed | 1983-02-14 |
| Depth | 640 ft |
| Surface location | 39.946406, -90.796815 · wells within 1 mile |
| State record | Illinois State Geological Survey ↗ |
| Data as of | 2026-10-17 |
From Illinois State Geological Survey public records. Verify with the state before relying on this information.