# Relationship history for MSHA mine 4502469

Current hierarchy: **Gedstad B A → B A Gedstad → B A Gedstad Gravel Pit**

- 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:** B A Gedstad → B A Gedstad Gravel Pit; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Gedstad B A → B A Gedstad Gravel Pit; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Gedstad B A → B A Gedstad; 1950-01-01 to current/open; source msha-controller-operator-history