# Relationship history for MSHA mine 1516784

Current hierarchy: **Rex Dean  Osborn → N D O Coal Company Inc → #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:** Emmett  Lawson → #2; 1978-04-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Mike J Enterprises Inc → #2; 1989-11-01 to 1993-07-07; source msha-controller-operator-history
- **controller_controls_mine:** Jack  Fannin et al → #2; 1989-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jack  Fannin et al → Mike J Enterprises Inc; 1989-11-01 to 1993-07-07; source msha-controller-operator-history
- **operator_operates_mine:** Tram Coal Company Inc → #2; 1993-07-08 to 1994-04-19; source msha-controller-operator-history
- **controller_controls_operator:** Emmett  Lawson → Tram Coal Company Inc; 1993-07-08 to 1994-04-19; source msha-controller-operator-history
- **operator_operates_mine:** Tram Coal Company Inc → #2; 1994-04-20 to 1994-08-09; source msha-controller-operator-history
- **controller_controls_mine:** Gary  Dunaway et al → #2; 1994-04-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Gary  Dunaway et al → Tram Coal Company Inc; 1994-04-20 to 1994-08-09; source msha-controller-operator-history
- **controller_controls_operator:** Roger Scott  Collins et al → Tram Coal Company Inc; 1994-04-20 to 1994-08-09; source msha-controller-operator-history
- **operator_operates_mine:** L & L Coal Company → #2; 1994-08-10 to 1999-06-15; source msha-controller-operator-history
- **controller_controls_mine:** Bobby  Lawson et al → #2; 1994-08-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bobby  Lawson et al → L & L Coal Company; 1994-08-10 to 1999-06-15; source msha-controller-operator-history
- **controller_controls_operator:** Earl  Lawson et al → L & L Coal Company; 1994-08-10 to 1999-06-15; source msha-controller-operator-history
- **operator_operates_mine:** Big I Mining Inc → #2; 1999-06-16 to 2000-10-16; source msha-controller-operator-history
- **controller_controls_mine:** Virgil  Isaac Jr → #2; 1999-06-16 to 2001-08-06; source msha-controller-operator-history
- **controller_controls_operator:** Virgil  Isaac Jr → Big I Mining Inc; 1999-06-16 to 2000-10-16; source msha-controller-operator-history
- **controller_controls_mine:** Rex Dean  Osborn → #2; 2000-05-15 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** N D O Coal Company Inc → #2; 2000-10-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Rex Dean  Osborn → N D O Coal Company Inc; 2000-10-17 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Virgil  Isaac Jr → #2; 2001-11-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Virgil  Isaac Jr → Big I Mining Inc; 2001-11-08 to 2000-10-16; source msha-controller-operator-history