# Relationship history for MSHA mine 3000070

Current hierarchy: **Heidelberg Materials AG → HEIDELBERG MATERIALS NORTHEAST LLC → CEMENTON 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:** Lehigh Portland Cement Company → CEMENTON QUARRY; 1950-01-01 to 2000-06-18; source msha-controller-operator-history
- **controller_controls_mine:** Heidelberg Materials AG → CEMENTON QUARRY; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Heidelberg Materials AG → Lehigh Portland Cement Company; 1950-01-01 to 2000-06-18; source msha-controller-operator-history
- **controller_controls_mine:** Hanson PLC → CEMENTON QUARRY; 1988-11-14 to 2007-08-22; source msha-controller-operator-history
- **controller_controls_mine:** Dyckerhoff & Heidelberger Zement Ag → CEMENTON QUARRY; 1999-04-17 to 2005-12-31; source msha-controller-operator-history
- **operator_operates_mine:** Lehigh Northeast Cement Company → CEMENTON QUARRY; 2000-06-19 to 2022-12-31; source msha-controller-operator-history
- **controller_controls_operator:** Dyckerhoff & Heidelberger Zement Ag → Lehigh Northeast Cement Company; 2000-06-19 to 2005-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Heidelberg Materials AG → CEMENTON QUARRY; 2000-07-21 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Heidelberg Materials AG → CEMENTON QUARRY; 2006-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Heidelberg Materials AG → Lehigh Northeast Cement Company; 2006-01-01 to 2022-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Heidelberg Materials AG → CEMENTON QUARRY; 2007-08-23 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Heidelberg Materials US Cement LLC → CEMENTON QUARRY; 2023-01-01 to 2025-04-20; source msha-controller-operator-history
- **controller_controls_operator:** Heidelberg Materials AG → Heidelberg Materials US Cement LLC; 2023-01-01 to 2025-04-20; source msha-controller-operator-history
- **operator_operates_mine:** Heidelberg Materials Northeast-NY LLC → CEMENTON QUARRY; 2025-04-21 to 2025-04-30; source msha-controller-operator-history
- **controller_controls_operator:** Heidelberg Materials AG → Heidelberg Materials Northeast-NY LLC; 2025-04-21 to 2025-04-30; source msha-controller-operator-history
- **controller_controls_operator:** Hanson PLC → Heidelberg Materials Northeast-NY LLC; 2025-04-21 to 2007-08-22; source msha-controller-operator-history
- **operator_operates_mine:** Heidelberg Materials Northeast LLC → CEMENTON QUARRY; 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