# Relationship history for MSHA mine 4400101

Current hierarchy: **Heidelberg Materials AG → Heidelberg Materials Northeast LLC → Hanson Aggregates Virginia**

- 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:** Riverton Corp → Hanson Aggregates Virginia; 1950-01-01 to 1980-10-31; source msha-controller-operator-history
- **controller_controls_mine:** Investment Corp Of Florida → Hanson Aggregates Virginia; 1950-01-01 to 1983-11-27; source msha-controller-operator-history
- **controller_controls_operator:** Investment Corp Of Florida → Riverton Corp; 1950-01-01 to 1980-10-31; source msha-controller-operator-history
- **operator_operates_mine:** Riverton Corp → Hanson Aggregates Virginia; 1980-11-01 to 2003-08-20; source msha-controller-operator-history
- **controller_controls_mine:** Capitol Materials Corporation → Hanson Aggregates Virginia; 1980-11-01 to 2002-05-20; source msha-controller-operator-history
- **controller_controls_operator:** Capitol Materials Corporation → Riverton Corp; 1980-11-01 to 2002-05-20; source msha-controller-operator-history
- **controller_controls_mine:** Hanson PLC → Hanson Aggregates Virginia; 1988-11-14 to 2007-08-22; source msha-controller-operator-history
- **controller_controls_mine:** Heidelberg Materials AG → Hanson Aggregates Virginia; 2000-07-21 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Italcementi Spa → Hanson Aggregates Virginia; 2002-05-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Italcementi Spa → Riverton Corp; 2002-05-21 to 2003-08-20; source msha-controller-operator-history
- **operator_operates_mine:** Lehigh Hanson ECC, Inc. → Hanson Aggregates Virginia; 2003-08-21 to 2018-10-21; source msha-controller-operator-history
- **controller_controls_mine:** Italcementi Spa → Hanson Aggregates Virginia; 2003-08-21 to 2016-10-11; source msha-controller-operator-history
- **controller_controls_operator:** Italcementi Spa → Lehigh Hanson ECC, Inc.; 2003-08-21 to 2016-10-11; source msha-controller-operator-history
- **controller_controls_mine:** Heidelberg Materials AG → Hanson Aggregates Virginia; 2007-08-23 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Heidelberg Materials AG → Hanson Aggregates Virginia; 2016-10-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Heidelberg Materials AG → Lehigh Hanson ECC, Inc.; 2016-10-12 to 2018-10-21; source msha-controller-operator-history
- **operator_operates_mine:** Lehigh Cement Company LLC → Hanson Aggregates Virginia; 2018-10-22 to 2022-02-24; source msha-controller-operator-history
- **controller_controls_operator:** Heidelberg Materials AG → Lehigh Cement Company LLC; 2018-10-22 to 2022-02-24; source msha-controller-operator-history
- **operator_operates_mine:** Heidelberg Materials Northeast LLC → Hanson Aggregates Virginia; 2022-02-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Heidelberg Materials AG → Heidelberg Materials Northeast LLC; 2022-02-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Hanson PLC → Heidelberg Materials Northeast LLC; 2022-02-25 to 2007-08-22; source msha-controller-operator-history