# Relationship history for MSHA mine 4404822

Current hierarchy: **Pruitt Lora J → Deel Fork Mining Corp → No 1**

- 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

- **controller_controls_mine:** Ervin  Stiltner → No 1; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** O K Coal Company Inc → No 1; 1977-06-01 to 1986-03-20; source msha-controller-operator-history
- **controller_controls_operator:** Ervin  Stiltner → O K Coal Company Inc; 1977-06-01 to 1986-03-20; source msha-controller-operator-history
- **operator_operates_mine:** Deel Fork Mining Corp → No 1; 1986-03-21 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Pruitt Lora J → No 1; 1986-03-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Pruitt Lora J → Deel Fork Mining Corp; 1986-03-21 to current/open; source msha-controller-operator-history