# Relationship history for MSHA mine 3200560

Current hierarchy: **Cudmore Clayton → Cudmore Gravel Supply → Owl Boy & Hopkins 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** Cudmore Gravel Supply → Owl Boy & Hopkins Pit; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Cudmore Clayton → Owl Boy & Hopkins Pit; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Cudmore Clayton → Cudmore Gravel Supply; 1950-01-01 to current/open; source msha-controller-operator-history