# Relationship history for MSHA mine 0405861

Current hierarchy: **Carla Jo  Whitehead → CJW Construction, Inc → Portable #1**

- 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:** CJW Construction, Inc → Portable #1; 2012-12-11 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Carla Jo  Whitehead → Portable #1; 2012-12-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Carla Jo  Whitehead → CJW Construction, Inc; 2012-12-11 to current/open; source msha-controller-operator-history