# Relationship history for MSHA mine 0405814

Current hierarchy: **Al  Pombo → Al Pombo, Inc → Turner 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

- **operator_operates_mine:** Al Pombo, Inc → Turner Pit; 2010-09-24 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Al  Pombo → Turner Pit; 2010-09-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Al  Pombo → Al Pombo, Inc; 2010-09-24 to current/open; source msha-controller-operator-history