# Relationship history for MSHA mine 1519134

Current hierarchy: **Goldia  Crain → K D Crain & Sons Inc → River View Carbon Recovery**

- 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

- **controller_controls_mine:** Goldia  Crain → River View Carbon Recovery; 2006-05-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** K D Crain & Sons Inc → River View Carbon Recovery; 2007-08-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Goldia  Crain → K D Crain & Sons Inc; 2007-08-10 to current/open; source msha-controller-operator-history