# Relationship history for MSHA mine 2400465

Current hierarchy: **Levi  Thompson → Granite Concrete Products LLC → Granite Concrete Product LLC**

- 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

- **operator_operates_mine:** Granite Concrete Company Inc → Granite Concrete Product LLC; 1950-01-01 to 1986-07-14; source msha-controller-operator-history
- **controller_controls_mine:** Robert R  Gruber → Granite Concrete Product LLC; 1950-01-01 to 1986-07-14; source msha-controller-operator-history
- **controller_controls_operator:** Robert R  Gruber → Granite Concrete Company Inc; 1950-01-01 to 1986-07-14; source msha-controller-operator-history
- **operator_operates_mine:** Granite Concrete Company Inc → Granite Concrete Product LLC; 1986-07-15 to 1992-09-30; source msha-controller-operator-history
- **controller_controls_mine:** George  Oldham → Granite Concrete Product LLC; 1986-07-15 to 1992-09-30; source msha-controller-operator-history
- **controller_controls_operator:** George  Oldham → Granite Concrete Company Inc; 1986-07-15 to 1992-09-30; source msha-controller-operator-history
- **operator_operates_mine:** Granite Concrete Company Inc → Granite Concrete Product LLC; 1992-10-01 to 2020-02-03; source msha-controller-operator-history
- **controller_controls_mine:** Neil J  Sullivan → Granite Concrete Product LLC; 1992-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Neil J  Sullivan → Granite Concrete Company Inc; 1992-10-01 to 2020-02-03; source msha-controller-operator-history
- **operator_operates_mine:** Granite Concrete Products LLC → Granite Concrete Product LLC; 2020-02-04 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Richard  Thompson → Granite Concrete Product LLC; 2020-02-04 to 2021-03-15; source msha-controller-operator-history
- **controller_controls_operator:** Richard  Thompson → Granite Concrete Products LLC; 2020-02-04 to 2021-03-15; source msha-controller-operator-history
- **controller_controls_mine:** Levi  Thompson → Granite Concrete Product LLC; 2021-03-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Levi  Thompson → Granite Concrete Products LLC; 2021-03-16 to current/open; source msha-controller-operator-history