# Relationship history for MSHA mine 1202461

Current hierarchy: **The Heritage Group → US Aggregates Inc → US Aggregates Lowell East 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 Lowell East Plant; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** The Heritage Group → US Aggregates Lowell East Plant; 1989-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** VOTORANTIM CIMENTOS → US Aggregates Lowell East Plant; 2008-02-02 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** VCNA Prairie LLC → US Aggregates Lowell East Plant; 2013-03-07 to 2018-06-08; source msha-controller-operator-history
- **controller_controls_operator:** VOTORANTIM CIMENTOS → VCNA Prairie LLC; 2013-03-07 to 2018-06-08; source msha-controller-operator-history
- **operator_operates_mine:** Heritage Aggregates, LLC → US Aggregates Lowell East Plant; 2018-06-09 to 2020-04-20; source msha-controller-operator-history
- **controller_controls_operator:** The Heritage Group → Heritage Aggregates, LLC; 2018-06-09 to 2020-04-20; source msha-controller-operator-history
- **operator_operates_mine:** US Aggregates Inc → US Aggregates Lowell East Plant; 2020-04-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** The Heritage Group → US Aggregates Inc; 2020-04-21 to current/open; source msha-controller-operator-history