# Relationship history for MSHA mine 3001283

Current hierarchy: **Heidelberg Materials AG → HEIDELBERG MATERIALS NORTHEAST LLC → ST JOHNSVILLE PLANT**

- 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

- **controller_controls_mine:** Koppers Company Inc → ST JOHNSVILLE PLANT; 1950-01-01 to 1988-11-13; source msha-controller-operator-history
- **operator_operates_mine:** John Talarico Contracting Corp → ST JOHNSVILLE PLANT; 1950-01-01 to 1987-04-07; source msha-controller-operator-history
- **controller_controls_mine:** Frank J  Talarico → ST JOHNSVILLE PLANT; 1950-01-01 to 1987-04-07; source msha-controller-operator-history
- **controller_controls_operator:** Frank J  Talarico → John Talarico Contracting Corp; 1950-01-01 to 1987-04-07; source msha-controller-operator-history
- **operator_operates_mine:** Eastern Rock Products Inc → ST JOHNSVILLE PLANT; 1987-04-08 to 1988-11-13; source msha-controller-operator-history
- **controller_controls_operator:** Koppers Company Inc → Eastern Rock Products Inc; 1987-04-08 to 1988-11-13; source msha-controller-operator-history
- **operator_operates_mine:** Hanson Aggregates New York Inc → ST JOHNSVILLE PLANT; 1988-11-14 to 2004-03-29; source msha-controller-operator-history
- **controller_controls_mine:** Hanson PLC → ST JOHNSVILLE PLANT; 1988-11-14 to 2007-08-22; source msha-controller-operator-history
- **controller_controls_operator:** Hanson PLC → Hanson Aggregates New York Inc; 1988-11-14 to 2004-03-29; source msha-controller-operator-history
- **operator_operates_mine:** Hanson Aggregates Inc → ST JOHNSVILLE PLANT; 2004-03-30 to 2004-06-09; source msha-controller-operator-history
- **controller_controls_operator:** Hanson PLC → Hanson Aggregates Inc; 2004-03-30 to 2004-06-09; source msha-controller-operator-history
- **operator_operates_mine:** Heidelberg Materials Northeast-NY LLC → ST JOHNSVILLE PLANT; 2004-06-10 to 2025-04-30; source msha-controller-operator-history
- **controller_controls_operator:** Hanson PLC → Heidelberg Materials Northeast-NY LLC; 2004-06-10 to 2007-08-22; source msha-controller-operator-history
- **controller_controls_mine:** Heidelberg Materials AG → ST JOHNSVILLE PLANT; 2007-08-23 to 2021-09-30; source msha-controller-operator-history
- **controller_controls_operator:** Heidelberg Materials AG → Hanson Aggregates Inc; 2007-08-23 to 2004-06-09; source msha-controller-operator-history
- **controller_controls_mine:** Heidelberg Materials AG → ST JOHNSVILLE PLANT; 2007-08-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Heidelberg Materials AG → Hanson Aggregates New York Inc; 2007-08-23 to 2004-03-29; source msha-controller-operator-history
- **controller_controls_operator:** Heidelberg Materials AG → Heidelberg Materials Northeast-NY LLC; 2007-08-23 to 2025-04-30; source msha-controller-operator-history
- **controller_controls_mine:** Martin Marietta Materials Inc → ST JOHNSVILLE PLANT; 2021-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Martin Marietta Materials Inc → Hanson Aggregates Inc; 2021-10-01 to 2004-06-09; source msha-controller-operator-history
- **operator_operates_mine:** Heidelberg Materials Northeast LLC → ST JOHNSVILLE PLANT; 2025-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Heidelberg Materials AG → Heidelberg Materials Northeast LLC; 2025-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Hanson PLC → Heidelberg Materials Northeast LLC; 2025-05-01 to 2007-08-22; source msha-controller-operator-history