# Relationship history for MSHA mine 3401689

Current hierarchy: **Okmulgee County-Ok → Okmulgee County → District #3 Pits**

- 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:** Okmulgee County → District #3 Pits; 1989-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Okmulgee County-Ok → District #3 Pits; 1989-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Okmulgee County-Ok → Okmulgee County; 1989-06-01 to current/open; source msha-controller-operator-history