# Relationship history for MSHA mine 1517259

Current hierarchy: **Earl  Lawson; Bobby  Lawson → High Ridge Coal Company Inc → No 5**

- 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:** Elrono Mining Inc → No 5; 1992-07-01 to 1993-07-27; source msha-controller-operator-history
- **controller_controls_mine:** Justice Fern → No 5; 1992-07-01 to 1993-07-27; source msha-controller-operator-history
- **controller_controls_operator:** Justice Fern → Elrono Mining Inc; 1992-07-01 to 1993-07-27; source msha-controller-operator-history
- **operator_operates_mine:** Elrono Mining Inc → No 5; 1993-07-28 to 1994-06-06; source msha-controller-operator-history
- **controller_controls_mine:** Clark Leonard Et Al → No 5; 1993-07-28 to 1994-06-06; source msha-controller-operator-history
- **controller_controls_operator:** Clark Leonard Et Al → Elrono Mining Inc; 1993-07-28 to 1994-06-06; source msha-controller-operator-history
- **controller_controls_mine:** Bobby  Lawson et al → No 5; 1993-09-07 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Gary  Dunaway et al → No 5; 1994-04-20 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Tram Coal Company Inc → No 5; 1994-06-07 to 1995-05-07; source msha-controller-operator-history
- **controller_controls_operator:** Gary  Dunaway et al → Tram Coal Company Inc; 1994-06-07 to 1995-05-07; source msha-controller-operator-history
- **controller_controls_operator:** Roger Scott  Collins et al → Tram Coal Company Inc; 1994-06-07 to 1995-05-07; source msha-controller-operator-history
- **operator_operates_mine:** High Ridge Coal Company Inc → No 5; 1995-05-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bobby  Lawson et al → High Ridge Coal Company Inc; 1995-05-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Earl  Lawson et al → High Ridge Coal Company Inc; 1995-05-08 to current/open; source msha-controller-operator-history