# Relationship history for MSHA mine 5002104

Current hierarchy: **Nathan Alan  Verba → A&M Gravel Products, LLC → A&M Gravel 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:** A&M Gravel Products, LLC → A&M Gravel Pit; 2023-05-21 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Nathan Alan  Verba → A&M Gravel Pit; 2023-05-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Nathan Alan  Verba → A&M Gravel Products, LLC; 2023-05-21 to current/open; source msha-controller-operator-history