# Relationship history for MSHA mine 2700552

Current hierarchy: **Dale  White → Leighton A. White, Inc. → Wilton 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

- **controller_controls_mine:** Dale  White → Wilton Quarry; 2018-07-10 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Leighton A. White, Inc. → Wilton Quarry; 2024-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dale  White → Leighton A. White, Inc.; 2024-03-01 to current/open; source msha-controller-operator-history