# Relationship history for MSHA mine 1000566

Current hierarchy: **Jeppesen & Wilson Co → Jeppesen & Wilson Co → Opal Mountain Mine**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** Jeppesen & Wilson Co → Opal Mountain Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Jeppesen & Wilson Co → Opal Mountain Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jeppesen & Wilson Co → Jeppesen & Wilson Co; 1950-01-01 to current/open; source msha-controller-operator-history