# Relationship history for MSHA mine 3300181

Current hierarchy: **CRH PLC → Stoneco, Inc. → Stoneco, Inc.**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Johnson S E Companies Inc → Stoneco, Inc.; 1950-01-01 to 2003-06-15; source msha-controller-operator-history
- **operator_operates_mine:** Wyandot Dolomite Inc → Stoneco, Inc.; 1950-01-01 to 2004-02-12; source msha-controller-operator-history
- **controller_controls_mine:** David  Wolfe → Stoneco, Inc.; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** David  Wolfe → Wyandot Dolomite Inc; 1950-01-01 to 2004-02-12; source msha-controller-operator-history
- **controller_controls_mine:** CRH PLC → Stoneco, Inc.; 2003-06-16 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Stoneco, Inc. → Stoneco, Inc.; 2004-02-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Johnson S E Companies Inc → Stoneco, Inc.; 2004-02-13 to 2003-06-15; source msha-controller-operator-history
- **controller_controls_operator:** CRH PLC → Stoneco, Inc.; 2004-02-13 to current/open; source msha-controller-operator-history