# Relationship history for MSHA mine 1202212

Current hierarchy: **The Heritage Group → US Aggregates LLC → Us Aggregates Richmond Plant**

- 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

- **controller_controls_mine:** The Heritage Group → Us Aggregates Richmond Plant; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** The Heritage Group → Us Aggregates Richmond Plant; 1989-06-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** U. S. Aggregates, Inc. → Us Aggregates Richmond Plant; 1997-05-01 to 2026-06-17; source msha-controller-operator-history
- **controller_controls_operator:** The Heritage Group → U. S. Aggregates, Inc.; 1997-05-01 to 2026-06-17; source msha-controller-operator-history
- **operator_operates_mine:** US Aggregates LLC → Us Aggregates Richmond Plant; 2026-06-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** The Heritage Group → US Aggregates LLC; 2026-06-18 to current/open; source msha-controller-operator-history