# Relationship history for MSHA mine 4502450

Current hierarchy: **Marvin  Prince → Bayview Redi-Mix Inc → BAYVIEW PIT AND PLANT**

- 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:** Bayview Redi Mix → BAYVIEW PIT AND PLANT; 1950-01-01 to 1988-07-31; source msha-controller-operator-history
- **controller_controls_mine:** Bush Robert E → BAYVIEW PIT AND PLANT; 1950-01-01 to 1988-07-31; source msha-controller-operator-history
- **controller_controls_operator:** Bush Robert E → Bayview Redi Mix; 1950-01-01 to 1988-07-31; source msha-controller-operator-history
- **operator_operates_mine:** Bayview Redi-Mix Inc → BAYVIEW PIT AND PLANT; 1988-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Jack L  Prince → BAYVIEW PIT AND PLANT; 1988-08-01 to 2019-06-18; source msha-controller-operator-history
- **controller_controls_operator:** Jack L  Prince → Bayview Redi-Mix Inc; 1988-08-01 to 2019-06-18; source msha-controller-operator-history
- **controller_controls_mine:** Marvin  Prince → BAYVIEW PIT AND PLANT; 2019-06-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Marvin  Prince → Bayview Redi-Mix Inc; 2019-06-19 to current/open; source msha-controller-operator-history