# Relationship history for MSHA mine 0301928

Current hierarchy: **Harland H  Crane Jr; Thomas L  Crane → Crane Bros. → Crane Bros.**

- 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:** Crane Bros. → Crane Bros.; 2006-04-11 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Thomas L  Crane et al → Crane Bros.; 2006-04-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Thomas L  Crane et al → Crane Bros.; 2006-04-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Harland H  Crane Jr et al → Crane Bros.; 2006-04-11 to current/open; source msha-controller-operator-history