# Relationship history for MSHA mine 1511617

Current hierarchy: **Fleming Roy → Coon Mining Company Inc → No 2 Mine**

- 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:** Fleming Roy → No 2 Mine; 1976-06-14 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** France Kermit & Stanley Osborne → No 2 Mine; 1977-08-15 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Laurel Ridge Coal Company → No 2 Mine; 1978-10-01 to 1979-06-10; source msha-controller-operator-history
- **controller_controls_operator:** France Kermit & Stanley Osborne → Laurel Ridge Coal Company; 1978-10-01 to 1979-06-10; source msha-controller-operator-history
- **operator_operates_mine:** Coon Mining Company Inc → No 2 Mine; 1979-06-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Fleming Roy → Coon Mining Company Inc; 1979-06-11 to current/open; source msha-controller-operator-history