# Relationship history for MSHA mine 2800757

Current hierarchy: **CRH PLC → Tilcon New York Inc → Ringwood 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Ringwood Washed Sand & Gravel Company → Ringwood Quarry; 1950-01-01 to 1980-07-27; source msha-controller-operator-history
- **controller_controls_mine:** Charles J  Rossi → Ringwood Quarry; 1950-01-01 to 1980-07-27; source msha-controller-operator-history
- **controller_controls_operator:** Charles J  Rossi → Ringwood Washed Sand & Gravel Company; 1950-01-01 to 1980-07-27; source msha-controller-operator-history
- **operator_operates_mine:** Ringwood Quarry Products Inc → Ringwood Quarry; 1980-07-28 to 1984-04-08; source msha-controller-operator-history
- **controller_controls_mine:** Thomas  Marroccoli → Ringwood Quarry; 1980-07-28 to 1984-04-08; source msha-controller-operator-history
- **controller_controls_operator:** Thomas  Marroccoli → Ringwood Quarry Products Inc; 1980-07-28 to 1984-04-08; source msha-controller-operator-history
- **operator_operates_mine:** West Milford Quarry Products Inc → Ringwood Quarry; 1984-04-09 to 1985-07-31; source msha-controller-operator-history
- **controller_controls_mine:** Rossi Robert R → Ringwood Quarry; 1984-04-09 to 1985-07-31; source msha-controller-operator-history
- **controller_controls_operator:** Rossi Robert R → West Milford Quarry Products Inc; 1984-04-09 to 1985-07-31; source msha-controller-operator-history
- **operator_operates_mine:** Dell Contractors Inc → Ringwood Quarry; 1985-08-01 to 1999-06-30; source msha-controller-operator-history
- **controller_controls_mine:** Anthony J  Dellechiaie → Ringwood Quarry; 1985-08-01 to 1999-06-30; source msha-controller-operator-history
- **controller_controls_operator:** Anthony J  Dellechiaie → Dell Contractors Inc; 1985-08-01 to 1999-06-30; source msha-controller-operator-history
- **controller_controls_mine:** CRH PLC → Ringwood Quarry; 1996-09-09 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Tilcon New York Inc → Ringwood Quarry; 1999-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** CRH PLC → Tilcon New York Inc; 1999-07-01 to current/open; source msha-controller-operator-history