# Relationship history for MSHA mine 1504272

Current hierarchy: **CRH PLC → Mulzer Crushed Stone, A CRH Company → DON C. RUSHING**

- 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:** Bart  Mulzer et al → DON C. RUSHING; 1950-01-01 to 2017-02-09; source msha-controller-operator-history
- **operator_operates_mine:** Yager Materials LLC → DON C. RUSHING; 1950-01-01 to 2019-06-30; source msha-controller-operator-history
- **controller_controls_mine:** Pat A  Yager → DON C. RUSHING; 1950-01-01 to 2019-01-30; source msha-controller-operator-history
- **controller_controls_operator:** Pat A  Yager → Yager Materials LLC; 1950-01-01 to 2019-01-30; source msha-controller-operator-history
- **controller_controls_mine:** CRH PLC → DON C. RUSHING; 2017-02-10 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Carmeuse Holding SA → DON C. RUSHING; 2019-01-31 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Carmeuse Holding SA → Yager Materials LLC; 2019-01-31 to 2019-06-30; source msha-controller-operator-history
- **operator_operates_mine:** Yager Materials Corp. → DON C. RUSHING; 2019-07-01 to 2024-10-11; source msha-controller-operator-history
- **controller_controls_mine:** Carmeuse Holding SA → DON C. RUSHING; 2019-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Carmeuse Holding SA → Yager Materials Corp.; 2019-07-01 to 2024-10-11; source msha-controller-operator-history
- **operator_operates_mine:** Mulzer Crushed Stone, A CRH Company → DON C. RUSHING; 2024-10-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bart  Mulzer et al → Mulzer Crushed Stone, A CRH Company; 2024-10-12 to 2017-02-09; source msha-controller-operator-history
- **controller_controls_operator:** CRH PLC → Mulzer Crushed Stone, A CRH Company; 2024-10-12 to current/open; source msha-controller-operator-history