# Relationship history for MSHA mine 4400234

Current hierarchy: **CRH PLC → Hinkle Contracting Company LLC → Ewing Stone**

- 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:** Rogers Group Inc → Ewing Stone; 1950-01-01 to 2002-03-25; source msha-controller-operator-history
- **controller_controls_mine:** Rogers Group Inc → Ewing Stone; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Rogers Group Inc → Rogers Group Inc; 1950-01-01 to 2002-03-25; source msha-controller-operator-history
- **controller_controls_mine:** Summit Materials LLC → Ewing Stone; 1950-01-01 to 2022-05-13; source msha-controller-operator-history
- **operator_operates_mine:** Elmo Greer & Sons LLC → Ewing Stone; 2002-03-26 to 2010-08-01; source msha-controller-operator-history
- **controller_controls_mine:** Jerry  Greer  et al → Ewing Stone; 2002-03-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jerry  Greer  et al → Elmo Greer & Sons LLC; 2002-03-26 to 2010-08-01; source msha-controller-operator-history
- **controller_controls_operator:** Rex  Greer  et al → Elmo Greer & Sons LLC; 2002-03-26 to 2010-08-01; source msha-controller-operator-history
- **operator_operates_mine:** Hinkle Contracting Company LLC → Ewing Stone; 2010-08-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Summit Materials LLC → Hinkle Contracting Company LLC; 2010-08-02 to 2022-05-13; source msha-controller-operator-history
- **controller_controls_mine:** CRH PLC → Ewing Stone; 2022-05-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** CRH PLC → Hinkle Contracting Company LLC; 2022-05-14 to current/open; source msha-controller-operator-history