# Relationship history for MSHA mine 4605186

Current hierarchy: **Jeffery Gary A → W B Swope Inc → 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

- **controller_controls_mine:** Swope W B → No 1; 1976-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Swope Coal Company → No 1; 1976-06-01 to 1977-11-30; source msha-controller-operator-history
- **controller_controls_operator:** Swope W B → Swope Coal Company; 1976-06-01 to 1977-11-30; source msha-controller-operator-history
- **operator_operates_mine:** Swope Coal Company → No 1; 1977-12-01 to 1978-11-27; source msha-controller-operator-history
- **controller_controls_mine:** Argentieri Reginald → No 1; 1977-12-01 to 1978-11-27; source msha-controller-operator-history
- **controller_controls_operator:** Argentieri Reginald → Swope Coal Company; 1977-12-01 to 1978-11-27; source msha-controller-operator-history
- **operator_operates_mine:** Rolim Coal Company → No 1; 1978-11-28 to 1979-11-25; source msha-controller-operator-history
- **controller_controls_mine:** Ronnie  Lilly → No 1; 1978-11-28 to 1979-11-25; source msha-controller-operator-history
- **controller_controls_operator:** Ronnie  Lilly → Rolim Coal Company; 1978-11-28 to 1979-11-25; source msha-controller-operator-history
- **operator_operates_mine:** W B Swope Inc → No 1; 1979-11-26 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Jeffery Gary A → No 1; 1979-11-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jeffery Gary A → W B Swope Inc; 1979-11-26 to current/open; source msha-controller-operator-history