# Relationship history for MSHA mine 4103845

Current hierarchy: **RMC Group PLC → Jobe Concrete Products Inc → RANCHO ESPUELA 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

- **controller_controls_mine:** Stanley P  Jobe et al → RANCHO ESPUELA QUARRY; 1983-08-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Jobe Concrete Products Inc → RANCHO ESPUELA QUARRY; 1995-03-01 to 1999-03-30; source msha-controller-operator-history
- **controller_controls_operator:** Stanley P  Jobe et al → Jobe Concrete Products Inc; 1995-03-01 to 1999-03-30; source msha-controller-operator-history
- **controller_controls_operator:** Irene  Epperson et al → Jobe Concrete Products Inc; 1995-03-01 to 1999-03-30; source msha-controller-operator-history
- **operator_operates_mine:** Jobe Concrete Products Inc → RANCHO ESPUELA QUARRY; 1999-03-31 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** RMC Group PLC → RANCHO ESPUELA QUARRY; 1999-03-31 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** RMC Group PLC → Jobe Concrete Products Inc; 1999-03-31 to current/open; source msha-controller-operator-history