# Relationship history for MSHA mine 3401747

Current hierarchy: **City Of Oklahoma City-Ok → City Of Oklahoma City → Red Clay 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** City Of Oklahoma City-Ok → Red Clay Pit; 1989-05-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** City Of Oklahoma City → Red Clay Pit; 1991-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** City Of Oklahoma City-Ok → City Of Oklahoma City; 1991-04-01 to current/open; source msha-controller-operator-history