# Relationship history for MSHA mine 1507194

Current hierarchy: **CRH PLC → Hinkle Contracting Company LLC → Cave Run 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

- **controller_controls_mine:** Summit Materials LLC → Cave Run Stone; 1950-01-01 to 2022-05-13; source msha-controller-operator-history
- **operator_operates_mine:** Ken-Mor Stone Inc → Cave Run Stone; 1978-03-09 to 2000-11-19; source msha-controller-operator-history
- **controller_controls_mine:** Rick  Ruth → Cave Run Stone; 1978-03-09 to 2001-06-30; source msha-controller-operator-history
- **controller_controls_operator:** Rick  Ruth → Ken-Mor Stone Inc; 1978-03-09 to 2000-11-19; source msha-controller-operator-history
- **operator_operates_mine:** Cave Run Stone,  LLC → Cave Run Stone; 2000-11-20 to 2008-03-03; source msha-controller-operator-history
- **controller_controls_mine:** Hinkle Contracting Corp  et al → Cave Run Stone; 2000-11-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Hinkle Contracting Corp  et al → Cave Run Stone,  LLC; 2000-11-20 to 2008-03-03; source msha-controller-operator-history
- **controller_controls_operator:** Walker Ventures LLC  et al → Cave Run Stone,  LLC; 2000-11-20 to 2008-03-03; source msha-controller-operator-history
- **operator_operates_mine:** Hinkle Contracting Company LLC → Cave Run Stone; 2008-03-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Summit Materials LLC → Hinkle Contracting Company LLC; 2008-03-04 to 2022-05-13; source msha-controller-operator-history
- **controller_controls_mine:** CRH PLC → Cave Run 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