# Relationship history for MSHA mine 1900299

Current hierarchy: **Amrize Ltd → Aggregate Industries Northeast Region Inc → Milbury Pit & Mill**

- 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:** De Falco Concrete Corp → Milbury Pit & Mill; 1950-01-01 to 1988-09-12; source msha-controller-operator-history
- **controller_controls_mine:** George  De Falco Sr → Milbury Pit & Mill; 1950-01-01 to 1988-09-12; source msha-controller-operator-history
- **controller_controls_operator:** George  De Falco Sr → De Falco Concrete Corp; 1950-01-01 to 1988-09-12; source msha-controller-operator-history
- **operator_operates_mine:** Emaral Corp → Milbury Pit & Mill; 1988-09-13 to 1992-10-05; source msha-controller-operator-history
- **controller_controls_mine:** Egerton Inc → Milbury Pit & Mill; 1988-09-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Egerton Inc → Emaral Corp; 1988-09-13 to 1992-10-05; source msha-controller-operator-history
- **operator_operates_mine:** Concrete Service → Milbury Pit & Mill; 1992-10-06 to 1999-10-19; source msha-controller-operator-history
- **controller_controls_mine:** Francis J  Triola → Milbury Pit & Mill; 1992-10-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Francis J  Triola → Concrete Service; 1992-10-06 to 1999-10-19; source msha-controller-operator-history
- **operator_operates_mine:** De Falco Concrete Services Inc → Milbury Pit & Mill; 1999-10-20 to 2001-05-31; source msha-controller-operator-history
- **controller_controls_mine:** Aggregate Industries PLC → Milbury Pit & Mill; 1999-10-20 to 2001-05-31; source msha-controller-operator-history
- **controller_controls_operator:** Aggregate Industries PLC → De Falco Concrete Services Inc; 1999-10-20 to 2001-05-31; source msha-controller-operator-history
- **operator_operates_mine:** Aggregate Industries Northeast Region Inc → Milbury Pit & Mill; 2001-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Aggregate Industries PLC → Milbury Pit & Mill; 2001-06-01 to 2009-04-29; source msha-controller-operator-history
- **controller_controls_operator:** Aggregate Industries PLC → Aggregate Industries Northeast Region Inc; 2001-06-01 to 2009-04-29; source msha-controller-operator-history
- **controller_controls_mine:** Holcim Ltd → Milbury Pit & Mill; 2009-04-30 to 2015-07-09; source msha-controller-operator-history
- **controller_controls_operator:** Holcim Ltd → Aggregate Industries Northeast Region Inc; 2009-04-30 to 2015-07-09; source msha-controller-operator-history
- **controller_controls_mine:** Holcim Ltd → Milbury Pit & Mill; 2015-07-10 to 2025-06-22; source msha-controller-operator-history
- **controller_controls_operator:** Holcim Ltd → Aggregate Industries Northeast Region Inc; 2015-07-10 to 2025-06-22; source msha-controller-operator-history
- **controller_controls_mine:** Amrize Ltd → Milbury Pit & Mill; 2025-06-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Amrize Ltd → Aggregate Industries Northeast Region Inc; 2025-06-23 to current/open; source msha-controller-operator-history