# Relationship history for MSHA mine 3401542

Current hierarchy: **Kingfisher County-Ok → Kingfisher County → Plant #1**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Kingfisher County-Ok → Plant #1; 1985-08-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Kingfisher County → Plant #1; 1986-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kingfisher County-Ok → Kingfisher County; 1986-01-01 to current/open; source msha-controller-operator-history