# Relationship history for MSHA mine 3401678

Current hierarchy: **Craig County-OK → Craig County District #2 → Mathis**

- 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:** Craig County-OK → Mathis; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** City Of Oklahoma City → Mathis; 1989-05-01 to 2001-02-01; source msha-controller-operator-history
- **controller_controls_mine:** City Of Oklahoma City-Ok → Mathis; 1989-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** City Of Oklahoma City-Ok → City Of Oklahoma City; 1989-05-01 to 2001-02-01; source msha-controller-operator-history
- **operator_operates_mine:** Craig County District #2 → Mathis; 2001-02-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Craig County-OK → Craig County District #2; 2001-02-02 to current/open; source msha-controller-operator-history