# Relationship history for MSHA mine 4002729

Current hierarchy: **Mitchell Pearl W → Mitchell Mining Company → Pitts Gap**

- 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:** Hitchcock Coal Company → Pitts Gap; 1981-06-01 to 1981-08-16; source msha-controller-operator-history
- **controller_controls_mine:** Hitchcock Stanley Ray → Pitts Gap; 1981-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Hitchcock Stanley Ray → Hitchcock Coal Company; 1981-06-01 to 1981-08-16; source msha-controller-operator-history
- **operator_operates_mine:** Mitchell Mining Company → Pitts Gap; 1981-08-17 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Mitchell Pearl W → Pitts Gap; 1981-08-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mitchell Pearl W → Mitchell Mining Company; 1981-08-17 to current/open; source msha-controller-operator-history