# Relationship history for MSHA mine 4402336

Current hierarchy: **Doug  Dalton → Cardinal Stone → Galax 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** Cardinal Stone Company → Galax Quarry; 1950-01-01 to 1986-05-25; source msha-controller-operator-history
- **controller_controls_mine:** Roanoke Corp → Galax Quarry; 1950-01-01 to 1986-05-25; source msha-controller-operator-history
- **controller_controls_operator:** Roanoke Corp → Cardinal Stone Company; 1950-01-01 to 1986-05-25; source msha-controller-operator-history
- **operator_operates_mine:** Cardinal Stone Company → Galax Quarry; 1986-05-26 to 1986-07-31; source msha-controller-operator-history
- **controller_controls_mine:** Leonard D  Hill → Galax Quarry; 1986-05-26 to 1986-07-31; source msha-controller-operator-history
- **controller_controls_operator:** Leonard D  Hill → Cardinal Stone Company; 1986-05-26 to 1986-07-31; source msha-controller-operator-history
- **operator_operates_mine:** Cardinal Stone Company Inc → Galax Quarry; 1986-08-01 to 2003-10-15; source msha-controller-operator-history
- **controller_controls_mine:** James M  Vannoy → Galax Quarry; 1986-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James M  Vannoy → Cardinal Stone Company Inc; 1986-08-01 to 2003-10-15; source msha-controller-operator-history
- **operator_operates_mine:** Cardinal Stone → Galax Quarry; 2003-10-16 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Doug  Dalton → Galax Quarry; 2003-10-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Doug  Dalton → Cardinal Stone; 2003-10-16 to current/open; source msha-controller-operator-history