# Relationship history for MSHA mine 4604963

Current hierarchy: **Garland George Jr → J W Mining Inc → White Oak Strip**

- 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:** Lawson W  Hamilton Jr → White Oak Strip; 1974-05-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Hansford Coal Company → White Oak Strip; 1975-12-01 to 1989-07-31; source msha-controller-operator-history
- **controller_controls_operator:** Lawson W  Hamilton Jr → Hansford Coal Company; 1975-12-01 to 1989-07-31; source msha-controller-operator-history
- **operator_operates_mine:** Red River Valley Coal Company → White Oak Strip; 1989-08-01 to 1991-04-30; source msha-controller-operator-history
- **controller_controls_mine:** Ashland Inc et al → White Oak Strip; 1989-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ashland Inc et al → Red River Valley Coal Company; 1989-08-01 to 1991-04-30; source msha-controller-operator-history
- **operator_operates_mine:** J W Mining Inc → White Oak Strip; 1991-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Garland George Jr → White Oak Strip; 1991-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Garland George Jr → J W Mining Inc; 1991-05-01 to current/open; source msha-controller-operator-history