# Relationship history for MSHA mine 1511923

Current hierarchy: **Warren W E & Jonah → W E & Jonah Warren Coal Company Inc → Surface Mine #5**

- 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:** Warren W E & Jonah → Surface Mine #5; 1976-08-31 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** W E & Jonah Warren Coal Company Inc → Surface Mine #5; 1979-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Warren W E & Jonah → W E & Jonah Warren Coal Company Inc; 1979-05-01 to current/open; source msha-controller-operator-history