# Relationship history for MSHA mine 4101327

Current hierarchy: **De Pauw Wilbur → De Pauw Construction Inc → Old Western 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:** Western Sand & Gravel Company Inc → Old Western Pit; 1950-01-01 to 1979-10-17; source msha-controller-operator-history
- **controller_controls_mine:** W T  Griffin → Old Western Pit; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** W T  Griffin → Western Sand & Gravel Company Inc; 1950-01-01 to 1979-10-17; source msha-controller-operator-history
- **controller_controls_mine:** De Pauw Wilbur → Old Western Pit; 1979-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Smith & Smith Construction → Old Western Pit; 1979-10-18 to 1982-12-13; source msha-controller-operator-history
- **controller_controls_mine:** Frank J  Smith Jr → Old Western Pit; 1979-10-18 to 1982-12-13; source msha-controller-operator-history
- **controller_controls_operator:** Frank J  Smith Jr → Smith & Smith Construction; 1979-10-18 to 1982-12-13; source msha-controller-operator-history
- **operator_operates_mine:** De Pauw Construction Inc → Old Western Pit; 1982-12-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** De Pauw Wilbur → De Pauw Construction Inc; 1982-12-14 to current/open; source msha-controller-operator-history