# Relationship history for MSHA mine 0504825

Current hierarchy: **Raymond C  Petersen → Colo River Ranch Gravel Pit → Colo River Ranch Gravel 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:** Colo River Ranch Gravel Pit → Colo River Ranch Gravel Pit; 2005-07-29 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Raymond C  Petersen → Colo River Ranch Gravel Pit; 2005-07-29 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Raymond C  Petersen → Colo River Ranch Gravel Pit; 2005-07-29 to current/open; source msha-controller-operator-history