# Relationship history for MSHA mine 2002902

Current hierarchy: **CRH PLC → Michigan Paving and Materials Company → Newport**

- 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:** Thompson Mc Cully Quarry Company → Newport; 1993-06-01 to 1999-07-07; source msha-controller-operator-history
- **controller_controls_mine:** Robert M  Thompson → Newport; 1993-06-01 to 1999-07-07; source msha-controller-operator-history
- **controller_controls_operator:** Robert M  Thompson → Thompson Mc Cully Quarry Company; 1993-06-01 to 1999-07-07; source msha-controller-operator-history
- **operator_operates_mine:** Thompson Mc Cully Quarry Company Inc → Newport; 1999-07-08 to 2004-02-08; source msha-controller-operator-history
- **controller_controls_mine:** CRH PLC → Newport; 1999-07-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** CRH PLC → Thompson Mc Cully Quarry Company Inc; 1999-07-08 to 2004-02-08; source msha-controller-operator-history
- **operator_operates_mine:** Stoneco of Michigan → Newport; 2004-02-09 to 2008-08-07; source msha-controller-operator-history
- **controller_controls_operator:** CRH PLC → Stoneco of Michigan; 2004-02-09 to 2008-08-07; source msha-controller-operator-history
- **controller_controls_mine:** CRH PLC → Newport; 2005-08-19 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Michigan Paving and Materials Company → Newport; 2008-08-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** CRH PLC → Michigan Paving and Materials Company; 2008-08-08 to current/open; source msha-controller-operator-history