# Relationship history for MSHA mine 1700839

Current hierarchy: **CRH PLC → Pike Industries Inc → Newry 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

- **controller_controls_mine:** CRH PLC → Newry Pit; 1988-06-02 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Bruce A  Manzer → Newry Pit; 1999-06-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Bruce A. Manzer Inc → Newry Pit; 2008-05-19 to 2018-02-01; source msha-controller-operator-history
- **controller_controls_operator:** Bruce A  Manzer → Bruce A. Manzer Inc; 2008-05-19 to 2018-02-01; source msha-controller-operator-history
- **operator_operates_mine:** Pike Industries Inc → Newry Pit; 2018-02-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** CRH PLC → Pike Industries Inc; 2018-02-02 to current/open; source msha-controller-operator-history