# Relationship history for MSHA mine 1515291

Current hierarchy: **Rutledge H Jack → Coal Exchange Of Kentucky Inc → Coal Exc Ky Inc #1 Craborchard Cree**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-18T09:31:49.615908+00:00

## Valid-time edges

- **operator_operates_mine:** Coal Exchange Of Kentucky Inc → Coal Exc Ky Inc #1 Craborchard Cree; 1985-07-19 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Rutledge H Jack → Coal Exc Ky Inc #1 Craborchard Cree; 1985-07-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Rutledge H Jack → Coal Exchange Of Kentucky Inc; 1985-07-19 to current/open; source msha-controller-operator-history