# Relationship history for MSHA mine 1202134

Current hierarchy: **The Heritage Group → US Aggregates LLC → US Aggregates-Lowell Quarry**

- 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:** Legacy Vulcan Corp (Form:Vulcan Materials Co) → US Aggregates-Lowell Quarry; 1950-01-01 to 2007-11-15; source msha-controller-operator-history
- **controller_controls_mine:** The Heritage Group → US Aggregates-Lowell Quarry; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** The Heritage Group → US Aggregates-Lowell Quarry; 1989-06-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Northern Indiana Materials Corp → US Aggregates-Lowell Quarry; 1993-03-01 to 2005-08-07; source msha-controller-operator-history
- **controller_controls_mine:** William J  Critser et al → US Aggregates-Lowell Quarry; 1993-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** William J  Critser et al → Northern Indiana Materials Corp; 1993-03-01 to 2005-08-07; source msha-controller-operator-history
- **controller_controls_operator:** Jean A  Critser et al → Northern Indiana Materials Corp; 1993-03-01 to 2005-08-07; source msha-controller-operator-history
- **operator_operates_mine:** VULCAN CONSTRUCTION MATERIALS, LP → US Aggregates-Lowell Quarry; 2005-08-08 to 2011-09-30; source msha-controller-operator-history
- **controller_controls_operator:** Legacy Vulcan Corp (Form:Vulcan Materials Co) → VULCAN CONSTRUCTION MATERIALS, LP; 2005-08-08 to 2007-11-15; source msha-controller-operator-history
- **controller_controls_mine:** Vulcan Materials Company → US Aggregates-Lowell Quarry; 2007-11-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Vulcan Materials Company → VULCAN CONSTRUCTION MATERIALS, LP; 2007-11-16 to 2011-09-30; source msha-controller-operator-history
- **operator_operates_mine:** Heritage Aggregates, LLC → US Aggregates-Lowell Quarry; 2011-10-01 to 2020-04-20; source msha-controller-operator-history
- **controller_controls_operator:** The Heritage Group → Heritage Aggregates, LLC; 2011-10-01 to 2020-04-20; source msha-controller-operator-history
- **operator_operates_mine:** US Aggregates Inc → US Aggregates-Lowell Quarry; 2020-04-21 to 2026-06-17; source msha-controller-operator-history
- **controller_controls_operator:** The Heritage Group → US Aggregates Inc; 2020-04-21 to 2026-06-17; source msha-controller-operator-history
- **operator_operates_mine:** US Aggregates LLC → US Aggregates-Lowell Quarry; 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