# Relationship history for MSHA mine 3003823

Current hierarchy: **Roger S  Rommel → POLAND SAND & GRAVEL LLC → POLAND SAND & GRAVEL NORWAY 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: 2026-10-18T09:31:49.615908+00:00

## Valid-time edges

- **controller_controls_mine:** Roger S  Rommel → POLAND SAND & GRAVEL NORWAY PIT; 2004-02-09 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Poland Sand & Gravel LLC → POLAND SAND & GRAVEL NORWAY PIT; 2011-09-27 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Roger S  Rommel → Poland Sand & Gravel LLC; 2011-09-27 to current/open; source msha-controller-operator-history