# Relationship history for MSHA mine 1200016

Current hierarchy: **The Heritage Group → US Aggregates LLC → US Aggregates-Flat Rock 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **controller_controls_mine:** The Heritage Group → US Aggregates-Flat Rock Plant; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Cave Stone Inc → US Aggregates-Flat Rock Plant; 1950-01-01 to 1986-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Warrior Petroleum Company Inc → US Aggregates-Flat Rock Plant; 1950-01-01 to 1986-12-31; source msha-controller-operator-history
- **controller_controls_operator:** Warrior Petroleum Company Inc → Cave Stone Inc; 1950-01-01 to 1986-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Crystal Flash Petroleum Corp → US Aggregates-Flat Rock Plant; 1950-01-01 to 1989-05-31; source msha-controller-operator-history
- **operator_operates_mine:** Meshberger Stone Inc → US Aggregates-Flat Rock Plant; 1987-01-01 to 1989-05-31; source msha-controller-operator-history
- **controller_controls_operator:** Crystal Flash Petroleum Corp → Meshberger Stone Inc; 1987-01-01 to 1989-05-31; source msha-controller-operator-history
- **operator_operates_mine:** Heritage Aggregates, LLC → US Aggregates-Flat Rock Plant; 1989-06-01 to 2020-05-11; source msha-controller-operator-history
- **controller_controls_mine:** The Heritage Group → US Aggregates-Flat Rock Plant; 1989-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** The Heritage Group → Heritage Aggregates, LLC; 1989-06-01 to 2020-05-11; source msha-controller-operator-history
- **operator_operates_mine:** US Aggregates Inc → US Aggregates-Flat Rock Plant; 2020-05-12 to 2026-06-17; source msha-controller-operator-history
- **controller_controls_operator:** The Heritage Group → US Aggregates Inc; 2020-05-12 to 2026-06-17; source msha-controller-operator-history
- **operator_operates_mine:** US Aggregates LLC → US Aggregates-Flat Rock 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