# Relationship history for MSHA mine 1103305

Current hierarchy: **Peter E  Powell → Galena Road Gravel → GRG Plant 4**

- 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 → GRG Plant 4; 1991-01-02 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Galena Road Gravel → GRG Plant 4; 2022-06-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Peter E  Powell → Galena Road Gravel; 2022-06-23 to current/open; source msha-controller-operator-history