# Relationship history for MSHA mine 0801220

Current hierarchy: **Wayne M  Beaver → Denali Investments Inc → Dowling Park 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

- **controller_controls_mine:** Luther M White Trust et al → Dowling Park Pit; 1980-04-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** White Construction Company Inc → Dowling Park Pit; 1994-08-01 to 2002-04-13; source msha-controller-operator-history
- **controller_controls_operator:** Luther M White Trust et al → White Construction Company Inc; 1994-08-01 to 2002-04-13; source msha-controller-operator-history
- **controller_controls_mine:** Wayne M  Beaver → Dowling Park Pit; 2000-10-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Denali Investments Inc → Dowling Park Pit; 2002-04-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Wayne M  Beaver → Denali Investments Inc; 2002-04-14 to current/open; source msha-controller-operator-history