# Relationship history for MSHA mine 1401775

Current hierarchy: **Ralph  Rogge → REC Sand&Gravel LLC → Rahe 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** REC Sand&Gravel LLC → Rahe Pit; 2016-02-25 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Ralph  Rogge → Rahe Pit; 2016-02-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ralph  Rogge → REC Sand&Gravel LLC; 2016-02-25 to current/open; source msha-controller-operator-history