# Relationship history for MSHA mine 3000947

Current hierarchy: **Holcim Ltd → Lafarge North America Incorporated → LANCASTER PLANT E**

- 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:** Pine Hill Materials Corp → LANCASTER PLANT E; 1950-01-01 to 2001-08-06; source msha-controller-operator-history
- **controller_controls_mine:** Pine Hill Concrete Mix Corp → LANCASTER PLANT E; 1950-01-01 to 2001-08-06; source msha-controller-operator-history
- **controller_controls_operator:** Pine Hill Concrete Mix Corp → Pine Hill Materials Corp; 1950-01-01 to 2001-08-06; source msha-controller-operator-history
- **controller_controls_mine:** Lafarge S A → LANCASTER PLANT E; 2001-07-12 to 2015-07-09; source msha-controller-operator-history
- **operator_operates_mine:** Lafarge North America Incorporated → LANCASTER PLANT E; 2001-08-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lafarge S A → Lafarge North America Incorporated; 2001-08-07 to 2015-07-09; source msha-controller-operator-history
- **controller_controls_mine:** Holcim Ltd → LANCASTER PLANT E; 2015-07-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Holcim Ltd → Lafarge North America Incorporated; 2015-07-10 to current/open; source msha-controller-operator-history