# Relationship history for MSHA mine 1510707

Current hierarchy: **France Kermit & Stanley Osborne → Laurel Ridge Coal Company → No 17**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Smallwood Roy Et Al → No 17; 1975-09-24 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Laurel Ridge Coal Company → No 17; 1977-08-15 to 1980-09-22; source msha-controller-operator-history
- **controller_controls_mine:** France Kermit & Stanley Osborne → No 17; 1977-08-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** France Kermit & Stanley Osborne → Laurel Ridge Coal Company; 1977-08-15 to 1980-09-22; source msha-controller-operator-history
- **operator_operates_mine:** Suzy Q Coal Company Inc → No 17; 1980-09-23 to 1983-02-01; source msha-controller-operator-history
- **controller_controls_operator:** Smallwood Roy Et Al → Suzy Q Coal Company Inc; 1980-09-23 to 1983-02-01; source msha-controller-operator-history
- **operator_operates_mine:** Laurel Ridge Coal Company → No 17; 1983-02-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** France Kermit & Stanley Osborne → Laurel Ridge Coal Company; 1983-02-02 to current/open; source msha-controller-operator-history