# Relationship history for MSHA mine 1900578

Current hierarchy: **CRH PLC → Foster/Southeastern Inc → FOSTER/SOUTHEASTERN**

- 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:** Avon Building Supply Inc → FOSTER/SOUTHEASTERN; 1950-01-01 to 1996-02-29; source msha-controller-operator-history
- **controller_controls_mine:** Tiso Albert → FOSTER/SOUTHEASTERN; 1950-01-01 to 1996-02-29; source msha-controller-operator-history
- **controller_controls_operator:** Tiso Albert → Avon Building Supply Inc; 1950-01-01 to 1996-02-29; source msha-controller-operator-history
- **operator_operates_mine:** Foster/Southeastern Inc → FOSTER/SOUTHEASTERN; 1996-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** CRH PLC → FOSTER/SOUTHEASTERN; 1996-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** CRH PLC → Foster/Southeastern Inc; 1996-03-01 to current/open; source msha-controller-operator-history