# Relationship history for MSHA mine 1508109

Current hierarchy: **Donn A  Chickering → N B Coal Company Inc → Permele Tipple**

- 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:** Hurn Franklin M & Raymond A Smego → Permele Tipple; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Mari Fuel & Processing Company Inc → Permele Tipple; 1974-12-01 to 1977-09-21; source msha-controller-operator-history
- **controller_controls_mine:** Hooper Charles → Permele Tipple; 1974-12-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Hooper Charles → Mari Fuel & Processing Company Inc; 1974-12-01 to 1977-09-21; source msha-controller-operator-history
- **operator_operates_mine:** F & R Coal Company Inc → Permele Tipple; 1977-09-22 to 1978-09-24; source msha-controller-operator-history
- **controller_controls_operator:** Hurn Franklin M & Raymond A Smego → F & R Coal Company Inc; 1977-09-22 to 1978-09-24; source msha-controller-operator-history
- **operator_operates_mine:** Stratford Coal Corp → Permele Tipple; 1978-09-25 to 1979-04-23; source msha-controller-operator-history
- **controller_controls_mine:** Bevins Clifford G → Permele Tipple; 1978-09-25 to 1979-04-23; source msha-controller-operator-history
- **controller_controls_operator:** Bevins Clifford G → Stratford Coal Corp; 1978-09-25 to 1979-04-23; source msha-controller-operator-history
- **operator_operates_mine:** Southwestern Elkhorn Coal Company → Permele Tipple; 1979-04-24 to 1981-10-15; source msha-controller-operator-history
- **controller_controls_mine:** Weddington Joe D → Permele Tipple; 1979-04-24 to 1981-10-15; source msha-controller-operator-history
- **controller_controls_operator:** Weddington Joe D → Southwestern Elkhorn Coal Company; 1979-04-24 to 1981-10-15; source msha-controller-operator-history
- **operator_operates_mine:** N B Coal Company Inc → Permele Tipple; 1981-10-16 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Donn A  Chickering → Permele Tipple; 1981-10-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Donn A  Chickering → N B Coal Company Inc; 1981-10-16 to current/open; source msha-controller-operator-history