# Relationship history for MSHA mine 1102943

Current hierarchy: **Peter E  Powell → Galena Road Gravel Inc → Liverpool Sand**

- 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:** Peter E  Powell → Liverpool Sand; 1991-01-02 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Galena Road Gravel Inc → Liverpool Sand; 1993-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Peter E  Powell → Galena Road Gravel Inc; 1993-07-01 to current/open; source msha-controller-operator-history