# Relationship history for MSHA mine 3300091

Current hierarchy: **CRH PLC → Stoneco, Inc. → White Rock Quarry**

- 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:** Edward Kraemer & Sons Inc → White Rock Quarry; 1950-01-01 to 1992-04-14; source msha-controller-operator-history
- **controller_controls_mine:** Thomas D  Kraemer et al → White Rock Quarry; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Thomas D  Kraemer et al → Edward Kraemer & Sons Inc; 1950-01-01 to 1992-04-14; source msha-controller-operator-history
- **controller_controls_operator:** Scott  Peterson et al → Edward Kraemer & Sons Inc; 1950-01-01 to 1992-04-14; source msha-controller-operator-history
- **controller_controls_mine:** Johnson S E Companies Inc → White Rock Quarry; 1950-01-01 to 2003-06-15; source msha-controller-operator-history
- **operator_operates_mine:** White Rock Quarry, LLC → White Rock Quarry; 1992-04-15 to 2007-02-19; source msha-controller-operator-history
- **controller_controls_mine:** Heritage Group & Crh Plc → White Rock Quarry; 1992-04-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Heritage Group & Crh Plc → White Rock Quarry, LLC; 1992-04-15 to 2007-02-19; source msha-controller-operator-history
- **controller_controls_mine:** CRH PLC → White Rock Quarry; 2003-06-16 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Stoneco, Inc. → White Rock Quarry; 2007-02-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Johnson S E Companies Inc → Stoneco, Inc.; 2007-02-20 to 2003-06-15; source msha-controller-operator-history
- **controller_controls_operator:** CRH PLC → Stoneco, Inc.; 2007-02-20 to current/open; source msha-controller-operator-history