# Relationship history for MSHA mine 1516649

Current hierarchy: **Stanley W Osborne → Joshco Mining Inc → No 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:** Bowling Charles D Et Al → No 1; 1978-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Koch Industries Inc → No 1; 1979-05-31 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Koch Carbon Inc → No 1; 1989-06-01 to 1990-01-14; source msha-controller-operator-history
- **controller_controls_operator:** Koch Industries Inc → Koch Carbon Inc; 1989-06-01 to 1990-01-14; source msha-controller-operator-history
- **operator_operates_mine:** Crystal Star Coal Company Inc → No 1; 1990-01-15 to 1990-06-18; source msha-controller-operator-history
- **controller_controls_operator:** Bowling Charles D Et Al → Crystal Star Coal Company Inc; 1990-01-15 to 1990-06-18; source msha-controller-operator-history
- **operator_operates_mine:** Joshco Mining Inc → No 1; 1990-06-19 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Stanley W Osborne → No 1; 1990-06-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Stanley W Osborne → Joshco Mining Inc; 1990-06-19 to current/open; source msha-controller-operator-history