# Relationship history for MSHA mine 3400378

Current hierarchy: **Mc Bride Jack-Don & Jim → Mc Bride Sand Company → Mc Bride Pit**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Carey Inc → Mc Bride Pit; 1950-01-01 to 1981-02-17; source msha-controller-operator-history
- **controller_controls_mine:** Carey Fred V → Mc Bride Pit; 1950-01-01 to 1981-02-17; source msha-controller-operator-history
- **controller_controls_operator:** Carey Fred V → Carey Inc; 1950-01-01 to 1981-02-17; source msha-controller-operator-history
- **operator_operates_mine:** Mc Bride Sand Company → Mc Bride Pit; 1981-02-18 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Mc Bride Jack-Don & Jim → Mc Bride Pit; 1981-02-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mc Bride Jack-Don & Jim → Mc Bride Sand Company; 1981-02-18 to current/open; source msha-controller-operator-history