# Relationship history for MSHA mine 4102796

Current hierarchy: **Lawson Warner → Appian Corp → Higginbotham 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

- **controller_controls_mine:** Lawson Warner → Higginbotham Pit; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Rose Joe & A L → Higginbotham Pit; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Rose Gravel Company → Higginbotham Pit; 1978-03-09 to 1982-12-15; source msha-controller-operator-history
- **controller_controls_operator:** Rose Joe & A L → Rose Gravel Company; 1978-03-09 to 1982-12-15; source msha-controller-operator-history
- **operator_operates_mine:** Appian Corp → Higginbotham Pit; 1982-12-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lawson Warner → Appian Corp; 1982-12-16 to current/open; source msha-controller-operator-history