# Relationship history for MSHA mine 1507275

Current hierarchy: **Elliot Ronald Lee → R & L Coal Company → No 2**

- 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:** Farris Harold & Ronald Elliott → No 2; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** F & C Coal Company → No 2; 1974-10-01 to 1975-02-15; source msha-controller-operator-history
- **controller_controls_mine:** Carter J C → No 2; 1974-10-01 to 1975-02-15; source msha-controller-operator-history
- **controller_controls_operator:** Carter J C → F & C Coal Company; 1974-10-01 to 1975-02-15; source msha-controller-operator-history
- **operator_operates_mine:** Bernie Coal Company → No 2; 1975-02-16 to 1976-02-10; source msha-controller-operator-history
- **controller_controls_mine:** Farris Harold → No 2; 1975-02-16 to 1977-01-19; source msha-controller-operator-history
- **controller_controls_operator:** Farris Harold → Bernie Coal Company; 1975-02-16 to 1976-02-10; source msha-controller-operator-history
- **controller_controls_mine:** Elliot Ronald Lee → No 2; 1976-02-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Lynn Camp Coal Company → No 2; 1976-02-11 to 1976-09-27; source msha-controller-operator-history
- **controller_controls_operator:** Farris Harold & Ronald Elliott → Lynn Camp Coal Company; 1976-02-11 to 1976-09-27; source msha-controller-operator-history
- **operator_operates_mine:** Bernie Coal Company → No 2; 1976-09-28 to 1977-01-19; source msha-controller-operator-history
- **controller_controls_operator:** Farris Harold → Bernie Coal Company; 1976-09-28 to 1977-01-19; source msha-controller-operator-history
- **operator_operates_mine:** R & L Coal Company → No 2; 1977-01-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Elliot Ronald Lee → R & L Coal Company; 1977-01-20 to current/open; source msha-controller-operator-history