# Relationship history for MSHA mine 1600885

Current hierarchy: **Rybolt Henry → L Higginbotham Inc → Joor Road Pit**

- 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:** L Higginbotham Inc → Joor Road Pit; 1950-01-01 to 1985-04-17; source msha-controller-operator-history
- **controller_controls_mine:** Higginbotham Leroy → Joor Road Pit; 1950-01-01 to 1985-04-17; source msha-controller-operator-history
- **controller_controls_operator:** Higginbotham Leroy → L Higginbotham Inc; 1950-01-01 to 1985-04-17; source msha-controller-operator-history
- **operator_operates_mine:** L Higginbotham Inc → Joor Road Pit; 1985-04-18 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Rybolt Henry → Joor Road Pit; 1985-04-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Rybolt Henry → L Higginbotham Inc; 1985-04-18 to current/open; source msha-controller-operator-history