# Relationship history for MSHA mine 3610379

Current hierarchy: **Heidelberg Materials AG → Heidelberg Materials Northeast LLC → PORTABLE LT110**

- 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

- **controller_controls_mine:** Peter DePaul Irrevocable Combined Trust → PORTABLE LT110; 1950-01-01 to 2024-07-31; source msha-controller-operator-history
- **controller_controls_mine:** Hanson PLC → PORTABLE LT110; 1988-11-14 to 2007-08-22; source msha-controller-operator-history
- **controller_controls_mine:** Heidelberg Materials AG → PORTABLE LT110; 2007-08-23 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** HIGHWAY MATERIALS, INC. → PORTABLE LT110; 2022-03-22 to 2025-11-30; source msha-controller-operator-history
- **controller_controls_operator:** Peter DePaul Irrevocable Combined Trust → HIGHWAY MATERIALS, INC.; 2022-03-22 to 2024-07-31; source msha-controller-operator-history
- **controller_controls_mine:** Heidelberg Materials AG → PORTABLE LT110; 2024-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Heidelberg Materials AG → HIGHWAY MATERIALS, INC.; 2024-08-01 to 2025-11-30; source msha-controller-operator-history
- **operator_operates_mine:** Heidelberg Materials Northeast LLC → PORTABLE LT110; 2025-12-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Heidelberg Materials AG → Heidelberg Materials Northeast LLC; 2025-12-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Hanson PLC → Heidelberg Materials Northeast LLC; 2025-12-01 to 2007-08-22; source msha-controller-operator-history