# Relationship history for MSHA mine 5400391

Current hierarchy: **Velez Rubin → Rexach Construction Company Inc → PR 53 PROJECT #709**

- 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:** Rexach Construction Company Inc → PR 53 PROJECT #709; 1996-12-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Velez Rubin → PR 53 PROJECT #709; 1996-12-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Velez Rubin → Rexach Construction Company Inc; 1996-12-01 to current/open; source msha-controller-operator-history