# Relationship history for MSHA mine 1516298

Current hierarchy: **Witten William D → G & H Mining Inc → No 12**

- 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:** Witten William D → No 12; 1987-12-08 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** G & H Mining Inc → No 12; 1988-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Witten William D → G & H Mining Inc; 1988-02-01 to current/open; source msha-controller-operator-history