# Relationship history for MSHA mine 0301202

Current hierarchy: **Gloria  Kennedy → Dequeen Sand & Gravel Company → ROLLING FORK PIT AND 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

- **operator_operates_mine:** Dequeen Sand & Gravel Company → ROLLING FORK PIT AND PLANT; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Gloria  Kennedy → ROLLING FORK PIT AND PLANT; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Gloria  Kennedy → Dequeen Sand & Gravel Company; 1950-01-01 to current/open; source msha-controller-operator-history