# Relationship history for MSHA mine 3401374

Current hierarchy: **Lucien N  Hines → Oklahoma Sand (Oks) Inc → Oklahoma Sand (Oks) Incorporated**

- 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

- **operator_operates_mine:** Oklahoma Sand (Oks) Inc → Oklahoma Sand (Oks) Incorporated; 1982-12-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Lucien N  Hines → Oklahoma Sand (Oks) Incorporated; 1982-12-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lucien N  Hines → Oklahoma Sand (Oks) Inc; 1982-12-01 to current/open; source msha-controller-operator-history