# Relationship history for MSHA mine 0505040

Current hierarchy: **CRH PLC → Oldcastle SW Group, Inc → Portable Crusher #6**

- 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:** John L  Ary → Portable Crusher #6; 1982-09-01 to 2023-03-27; source msha-controller-operator-history
- **controller_controls_mine:** CRH PLC → Portable Crusher #6; 1998-01-05 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** A & S Construction Co. → Portable Crusher #6; 2015-03-25 to 2024-07-18; source msha-controller-operator-history
- **controller_controls_operator:** John L  Ary → A & S Construction Co.; 2015-03-25 to 2023-03-27; source msha-controller-operator-history
- **controller_controls_mine:** John Paul  Ary → Portable Crusher #6; 2023-03-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** John Paul  Ary → A & S Construction Co.; 2023-03-28 to 2024-07-18; source msha-controller-operator-history
- **operator_operates_mine:** Oldcastle SW Group, Inc → Portable Crusher #6; 2024-07-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** CRH PLC → Oldcastle SW Group, Inc; 2024-07-19 to current/open; source msha-controller-operator-history