# Relationship history for MSHA mine 4405748

Current hierarchy: **Ronald  Combs → Hiope Mining Inc → Mine 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Freestone Coal Company Inc → Mine No 1; 1981-10-01 to 1985-05-30; source msha-controller-operator-history
- **controller_controls_mine:** Herbert D  Roberts → Mine No 1; 1981-10-01 to 1985-05-30; source msha-controller-operator-history
- **controller_controls_operator:** Herbert D  Roberts → Freestone Coal Company Inc; 1981-10-01 to 1985-05-30; source msha-controller-operator-history
- **operator_operates_mine:** Hiope Mining Inc → Mine No 1; 1985-05-31 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Ronald  Combs et al → Mine No 1; 1985-05-31 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ronald  Combs et al → Hiope Mining Inc; 1985-05-31 to current/open; source msha-controller-operator-history