# Relationship history for MSHA mine 3402241

Current hierarchy: **Michael W  Nation → Nation Construction → Nation 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:** Nation Construction → Nation Pit; 2024-04-15 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Michael W  Nation → Nation Pit; 2024-04-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Michael W  Nation → Nation Construction; 2024-04-15 to current/open; source msha-controller-operator-history