# Relationship history for MSHA mine 1102372

Current hierarchy: **Peter E  Powell → Galena Road Gravel Inc → Irions 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:** Chillicothe Sand & Gravel → Irions Pit; 1950-01-01 to 1983-08-03; source msha-controller-operator-history
- **controller_controls_mine:** John N  Hallick → Irions Pit; 1950-01-01 to 1983-08-03; source msha-controller-operator-history
- **controller_controls_operator:** John N  Hallick → Chillicothe Sand & Gravel; 1950-01-01 to 1983-08-03; source msha-controller-operator-history
- **operator_operates_mine:** Galena Road Gravel Inc → Irions Pit; 1983-08-04 to 1991-01-01; source msha-controller-operator-history
- **controller_controls_mine:** William  Waibel  et al → Irions Pit; 1983-08-04 to 1991-01-01; source msha-controller-operator-history
- **controller_controls_operator:** William  Waibel  et al → Galena Road Gravel Inc; 1983-08-04 to 1991-01-01; source msha-controller-operator-history
- **operator_operates_mine:** Galena Road Gravel Inc → Irions Pit; 1991-01-02 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Peter E  Powell → Irions Pit; 1991-01-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Peter E  Powell → Galena Road Gravel Inc; 1991-01-02 to current/open; source msha-controller-operator-history