# Relationship history for MSHA mine 4400167

Current hierarchy: **R David  Jessee; C D  Litton → Woodway Stone Co → Woodway Stone Co**

- 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:** Woodway Stone Company Inc → Woodway Stone Co; 1950-01-01 to 1994-06-12; source msha-controller-operator-history
- **controller_controls_mine:** Mary Ethel  Jessee → Woodway Stone Co; 1950-01-01 to 1994-06-12; source msha-controller-operator-history
- **controller_controls_operator:** Mary Ethel  Jessee → Woodway Stone Company Inc; 1950-01-01 to 1994-06-12; source msha-controller-operator-history
- **operator_operates_mine:** Woodway Stone Co → Woodway Stone Co; 1994-06-13 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** R David  Jessee et al → Woodway Stone Co; 1994-06-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** R David  Jessee et al → Woodway Stone Co; 1994-06-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** C D  Litton et al → Woodway Stone Co; 1994-06-13 to current/open; source msha-controller-operator-history