# Relationship history for MSHA mine 4000354

Current hierarchy: **Williams Billie E → Wilson Coal Company → Williams Mine No 1**

- 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

- **operator_operates_mine:** Wilson Coal Company Inc → Williams Mine No 1; 1950-01-01 to 1983-11-15; source msha-controller-operator-history
- **controller_controls_mine:** Wilson George → Williams Mine No 1; 1950-01-01 to 1983-11-15; source msha-controller-operator-history
- **controller_controls_operator:** Wilson George → Wilson Coal Company Inc; 1950-01-01 to 1983-11-15; source msha-controller-operator-history
- **operator_operates_mine:** Cook Coal Company → Williams Mine No 1; 1983-11-16 to 1984-06-24; source msha-controller-operator-history
- **controller_controls_mine:** Cook Frank → Williams Mine No 1; 1983-11-16 to 1984-06-24; source msha-controller-operator-history
- **controller_controls_operator:** Cook Frank → Cook Coal Company; 1983-11-16 to 1984-06-24; source msha-controller-operator-history
- **operator_operates_mine:** Ken Ray Coal Company Inc → Williams Mine No 1; 1984-06-25 to 1984-11-18; source msha-controller-operator-history
- **controller_controls_mine:** Daugherty Leona Et Al → Williams Mine No 1; 1984-06-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Daugherty Leona Et Al → Ken Ray Coal Company Inc; 1984-06-25 to 1984-11-18; source msha-controller-operator-history
- **operator_operates_mine:** Wilson Coal Company → Williams Mine No 1; 1984-11-19 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Williams Billie E → Williams Mine No 1; 1984-11-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Williams Billie E → Wilson Coal Company; 1984-11-19 to current/open; source msha-controller-operator-history