# Relationship history for MSHA mine 0800951

Current hierarchy: **Luther M White Trust → White Construction Company Inc → Alva 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:** White Construction Company Inc → Alva Pit; 1980-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Luther M White Trust et al → Alva Pit; 1980-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Luther M White Trust et al → White Construction Company Inc; 1980-04-01 to current/open; source msha-controller-operator-history