# Relationship history for MSHA mine 1513085

Current hierarchy: **Pendleton Eugene → Mountain Ridge Mining 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

- **operator_operates_mine:** Eastern K Coal Company Inc → No 1; 1981-09-01 to 1981-10-27; source msha-controller-operator-history
- **controller_controls_mine:** Cochran Lloyd Et Al → No 1; 1981-09-01 to 1982-11-02; source msha-controller-operator-history
- **controller_controls_operator:** Cochran Lloyd Et Al → Eastern K Coal Company Inc; 1981-09-01 to 1981-10-27; source msha-controller-operator-history
- **operator_operates_mine:** Darkmont Coal Corp → No 1; 1981-10-28 to 1984-01-10; source msha-controller-operator-history
- **controller_controls_mine:** Cumberland Resources Corporation → No 1; 1981-10-28 to 1984-01-10; source msha-controller-operator-history
- **controller_controls_operator:** Cumberland Resources Corporation → Darkmont Coal Corp; 1981-10-28 to 1984-01-10; source msha-controller-operator-history
- **operator_operates_mine:** L A R Mining Company Inc → No 1; 1984-01-11 to 1988-06-06; source msha-controller-operator-history
- **controller_controls_mine:** Roberts Thomas W Et Al → No 1; 1984-01-11 to 1988-11-21; source msha-controller-operator-history
- **controller_controls_operator:** Roberts Thomas W Et Al → L A R Mining Company Inc; 1984-01-11 to 1988-06-06; source msha-controller-operator-history
- **operator_operates_mine:** L A R Mining Inc → No 1; 1988-06-07 to 1989-03-02; source msha-controller-operator-history
- **controller_controls_mine:** Lunsford Douglas K → No 1; 1988-06-07 to 1989-03-02; source msha-controller-operator-history
- **controller_controls_operator:** Lunsford Douglas K → L A R Mining Inc; 1988-06-07 to 1989-03-02; source msha-controller-operator-history
- **operator_operates_mine:** Mountain Ridge Mining Inc → No 1; 1989-03-03 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Pendleton Eugene → No 1; 1989-03-03 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Pendleton Eugene → Mountain Ridge Mining Inc; 1989-03-03 to current/open; source msha-controller-operator-history