# Relationship history for MSHA mine 1511937

Current hierarchy: **Lewis Paul Ed → Paul & Robert Lewis Mining Inc → No 1 'C' Seam**

- 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:** Paul & Robert Lewis Mining Inc → No 1 'C' Seam; 1979-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Lewis Paul Ed → No 1 'C' Seam; 1979-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lewis Paul Ed → Paul & Robert Lewis Mining Inc; 1979-06-01 to current/open; source msha-controller-operator-history