# Relationship history for MSHA mine 0102289

Current hierarchy: **Hyatt Cleve → Hyatt Sand & Gravel → Crawford 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

- **controller_controls_mine:** Hyatt Cleve → Crawford Pit; 1979-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Hyatt Sand & Gravel → Crawford Pit; 1981-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Hyatt Cleve → Hyatt Sand & Gravel; 1981-01-01 to current/open; source msha-controller-operator-history