# Relationship history for MSHA mine 1517919

Current hierarchy: **Stanley W Osborne → Sister Bear Mining Inc → 1**

- 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:** Anthony  Newsome → 1; 1975-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Stanley W Osborne → 1; 1996-09-04 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Jet Coal Company Inc → 1; 1997-04-01 to 1997-09-10; source msha-controller-operator-history
- **controller_controls_operator:** Anthony  Newsome → Jet Coal Company Inc; 1997-04-01 to 1997-09-10; source msha-controller-operator-history
- **operator_operates_mine:** Sister Bear Mining Inc → 1; 1997-09-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Stanley W Osborne → Sister Bear Mining Inc; 1997-09-11 to current/open; source msha-controller-operator-history