# Relationship history for MSHA mine 2200781

Current hierarchy: **Terry G  Powell; Brett W  Powell → P & P Sand & Gravel LLC → P & P Sand & Gravel LLC**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** P & P Sand & Gravel LLC → P & P Sand & Gravel LLC; 2008-09-11 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Terry G  Powell et al → P & P Sand & Gravel LLC; 2008-09-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Terry G  Powell et al → P & P Sand & Gravel LLC; 2008-09-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Brett W  Powell et al → P & P Sand & Gravel LLC; 2008-09-11 to current/open; source msha-controller-operator-history