# Relationship history for MSHA mine 3002775

Current hierarchy: **Scoville Vernon A → Vern Scoville Gravel → Scoville 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:** Vern Scoville Gravel → Scoville Pit; 1987-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Scoville Vernon A → Scoville Pit; 1987-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Scoville Vernon A → Vern Scoville Gravel; 1987-03-01 to current/open; source msha-controller-operator-history