# Relationship history for MSHA mine 2200211

Current hierarchy: **CRH PLC → Bacco Materials Inc → 102 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:** Bacco Materials Inc → 102 Pit; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Blain Sand & Gravel Inc → 102 Pit; 1950-01-01 to 2021-12-02; source msha-controller-operator-history
- **controller_controls_operator:** Blain Sand & Gravel Inc → Bacco Materials Inc; 1950-01-01 to 2021-12-02; source msha-controller-operator-history
- **controller_controls_mine:** CRH PLC → 102 Pit; 2021-12-03 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** CRH PLC → Bacco Materials Inc; 2021-12-03 to current/open; source msha-controller-operator-history