# Relationship history for MSHA mine 5001496

Current hierarchy: **Colas S A → University Redi-Mix → Mobile Plant #4**

- 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:** Phil  Godfrey → Mobile Plant #4; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Dwain  Reddekopp → Mobile Plant #4; 1979-06-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Red Samm Construction Inc → Mobile Plant #4; 1985-09-01 to 1988-07-12; source msha-controller-operator-history
- **controller_controls_operator:** Phil  Godfrey → Red Samm Construction Inc; 1985-09-01 to 1988-07-12; source msha-controller-operator-history
- **operator_operates_mine:** Dwain Reddekopp Inc → Mobile Plant #4; 1988-07-13 to 1991-12-31; source msha-controller-operator-history
- **controller_controls_operator:** Dwain  Reddekopp → Dwain Reddekopp Inc; 1988-07-13 to 1991-12-31; source msha-controller-operator-history
- **operator_operates_mine:** Red Samm Construction Inc → Mobile Plant #4; 1992-01-01 to 1995-02-28; source msha-controller-operator-history
- **controller_controls_operator:** Phil  Godfrey → Red Samm Construction Inc; 1992-01-01 to 1995-02-28; source msha-controller-operator-history
- **operator_operates_mine:** University Redi-Mix → Mobile Plant #4; 1995-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Gordon  Crawley → Mobile Plant #4; 1995-03-01 to 2000-08-31; source msha-controller-operator-history
- **controller_controls_operator:** Gordon  Crawley → University Redi-Mix; 1995-03-01 to 2000-08-31; source msha-controller-operator-history
- **controller_controls_mine:** Colas S A → Mobile Plant #4; 2000-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Colas S A → University Redi-Mix; 2000-09-01 to current/open; source msha-controller-operator-history