# Relationship history for MSHA mine 0400600

Current hierarchy: **CRH PLC → BoDean Co Inc → Mark West Quarry**

- 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:** Richard E Malugani → Mark West Quarry; 1950-01-01 to 1979-03-31; source msha-controller-operator-history
- **controller_controls_mine:** Malugani Richard E → Mark West Quarry; 1950-01-01 to 1979-03-31; source msha-controller-operator-history
- **controller_controls_operator:** Malugani Richard E → Richard E Malugani; 1950-01-01 to 1979-03-31; source msha-controller-operator-history
- **operator_operates_mine:** Mark West Shale Pit Inc → Mark West Quarry; 1979-04-01 to 1989-03-31; source msha-controller-operator-history
- **controller_controls_mine:** Kenneth  Ford → Mark West Quarry; 1979-04-01 to 1989-03-31; source msha-controller-operator-history
- **controller_controls_operator:** Kenneth  Ford → Mark West Shale Pit Inc; 1979-04-01 to 1989-03-31; source msha-controller-operator-history
- **operator_operates_mine:** BoDean Co Inc → Mark West Quarry; 1989-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Dean  Soiland → Mark West Quarry; 1989-04-01 to 2024-04-04; source msha-controller-operator-history
- **controller_controls_operator:** Dean  Soiland → BoDean Co Inc; 1989-04-01 to 2024-04-04; source msha-controller-operator-history
- **controller_controls_mine:** CRH PLC → Mark West Quarry; 2024-04-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** CRH PLC → BoDean Co Inc; 2024-04-05 to current/open; source msha-controller-operator-history