# Relationship history for MSHA mine 4103436

Current hierarchy: **Cemex S A → CEMEX Construction Materials South LLC → TORO 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 → TORO QUARRY; 1983-08-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Robert F Foster Inc → TORO QUARRY; 1986-10-01 to 1988-01-31; source msha-controller-operator-history
- **controller_controls_mine:** Robert  Foster → TORO QUARRY; 1986-10-01 to 1988-01-31; source msha-controller-operator-history
- **controller_controls_operator:** Robert  Foster → Robert F Foster Inc; 1986-10-01 to 1988-01-31; source msha-controller-operator-history
- **operator_operates_mine:** Jobe Concrete Products Inc → TORO QUARRY; 1988-02-01 to 1999-03-30; source msha-controller-operator-history
- **controller_controls_operator:** Stanley P  Jobe et al → Jobe Concrete Products Inc; 1988-02-01 to 1999-03-30; source msha-controller-operator-history
- **controller_controls_operator:** Irene  Epperson et al → Jobe Concrete Products Inc; 1988-02-01 to 1999-03-30; source msha-controller-operator-history
- **operator_operates_mine:** Jobe Concrete Products Inc → TORO QUARRY; 1999-03-31 to 2005-02-28; source msha-controller-operator-history
- **controller_controls_mine:** RMC Group PLC → TORO 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 2005-02-28; source msha-controller-operator-history
- **controller_controls_mine:** Cemex S A → TORO QUARRY; 2001-07-10 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** CEMEX El Paso Inc → TORO QUARRY; 2005-03-01 to 2005-03-29; source msha-controller-operator-history
- **controller_controls_mine:** Cemex S A → TORO QUARRY; 2005-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Cemex S A → CEMEX El Paso Inc; 2005-03-01 to 2005-03-29; source msha-controller-operator-history
- **operator_operates_mine:** CEMEX Construction Materials LP → TORO QUARRY; 2005-03-30 to 2008-08-19; source msha-controller-operator-history
- **controller_controls_operator:** Cemex S A → CEMEX Construction Materials LP; 2005-03-30 to 2008-08-19; source msha-controller-operator-history
- **controller_controls_mine:** Cemex S A → TORO QUARRY; 2008-08-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** CEMEX Construction Materials South LLC → TORO QUARRY; 2008-08-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Cemex S A → CEMEX Construction Materials South LLC; 2008-08-20 to current/open; source msha-controller-operator-history