# Relationship history for MSHA mine 4100275

Current hierarchy: **Lone Star Funds → U S Brick, Inc. → Plant 2**

- 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:** Can-Tex Industries → Plant 2; 1950-01-01 to 1983-11-08; source msha-controller-operator-history
- **controller_controls_mine:** Harsco Corp → Plant 2; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Harsco Corp → Can-Tex Industries; 1950-01-01 to 1983-11-08; source msha-controller-operator-history
- **controller_controls_mine:** Jannock Ltd → Plant 2; 1950-01-01 to 2002-04-15; source msha-controller-operator-history
- **operator_operates_mine:** U S Brick, Inc. → Plant 2; 1983-11-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jannock Ltd → U S Brick, Inc.; 1983-11-09 to 2002-04-15; source msha-controller-operator-history
- **controller_controls_mine:** Hanson PLC → Plant 2; 2002-04-16 to 2007-08-22; source msha-controller-operator-history
- **controller_controls_operator:** Hanson PLC → U S Brick, Inc.; 2002-04-16 to 2007-08-22; source msha-controller-operator-history
- **controller_controls_mine:** Heidelberg Materials AG → Plant 2; 2007-08-23 to 2015-03-12; source msha-controller-operator-history
- **controller_controls_operator:** Heidelberg Materials AG → U S Brick, Inc.; 2007-08-23 to 2015-03-12; source msha-controller-operator-history
- **controller_controls_mine:** Lone Star Funds → Plant 2; 2015-03-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lone Star Funds → U S Brick, Inc.; 2015-03-13 to current/open; source msha-controller-operator-history