# Relationship history for MSHA mine 0404400

Current hierarchy: **Wendy Christine Mining Company → Wendy Christine Mining Company → Truro**

- 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:** Wendy Christine Mining Company → Truro; 1980-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Wendy Christine Mining Company → Truro; 1980-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Wendy Christine Mining Company → Wendy Christine Mining Company; 1980-04-01 to current/open; source msha-controller-operator-history