# Relationship history for MSHA mine 0901138

Current hierarchy: **Charles W  Neal → Neal Stone, LLC → Neal Stone Quarry**

- 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:** Neal Stone, LLC → Neal Stone Quarry; 2001-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Charles W  Neal → Neal Stone Quarry; 2001-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Charles W  Neal → Neal Stone, LLC; 2001-03-01 to current/open; source msha-controller-operator-history