# Relationship history for MSHA mine 0800511

Current hierarchy: **Cemex S A → CEMEX Construction Materials Florida, LLC → CARD SOUND 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:** Florida Rock & Sand Company Inc → CARD SOUND QUARRY; 1950-01-01 to 1999-10-15; source msha-controller-operator-history
- **controller_controls_mine:** Steve J  Torcise → CARD SOUND QUARRY; 1950-01-01 to 1999-10-15; source msha-controller-operator-history
- **controller_controls_operator:** Steve J  Torcise → Florida Rock & Sand Company Inc; 1950-01-01 to 1999-10-15; source msha-controller-operator-history
- **operator_operates_mine:** RMC South Florida, Inc → CARD SOUND QUARRY; 1999-10-16 to 2005-12-31; source msha-controller-operator-history
- **controller_controls_mine:** RMC Group PLC → CARD SOUND QUARRY; 1999-10-16 to 2005-02-28; source msha-controller-operator-history
- **controller_controls_operator:** RMC Group PLC → RMC South Florida, Inc; 1999-10-16 to 2005-02-28; source msha-controller-operator-history
- **controller_controls_mine:** Cemex S A → CARD SOUND QUARRY; 2005-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Cemex S A → RMC South Florida, Inc; 2005-03-01 to 2005-12-31; source msha-controller-operator-history
- **operator_operates_mine:** RMC Florida Group LTD → CARD SOUND QUARRY; 2006-01-01 to 2008-12-03; source msha-controller-operator-history
- **controller_controls_mine:** Cemex S A → CARD SOUND QUARRY; 2006-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Cemex S A → RMC Florida Group LTD; 2006-01-01 to 2008-12-03; source msha-controller-operator-history
- **operator_operates_mine:** CEMEX Construction Materials Florida, LLC → CARD SOUND QUARRY; 2008-12-04 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Cemex S A → CARD SOUND QUARRY; 2008-12-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Cemex S A → CEMEX Construction Materials Florida, LLC; 2008-12-04 to current/open; source msha-controller-operator-history