# Relationship history for MSHA mine 1514915

Current hierarchy: **Blanton David Deron → Double D Energy Inc → Camp Creek #3**

- 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:** Double D Energy Inc → Camp Creek #3; 1984-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Blanton David Deron → Camp Creek #3; 1984-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Blanton David Deron → Double D Energy Inc; 1984-10-01 to current/open; source msha-controller-operator-history