# Relationship history for MSHA mine 4300749

Current hierarchy: **Anthony R  Keough → Switch Rd Slate → Global Slate**

- 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

- **controller_controls_mine:** Anthony R  Keough → Global Slate; 2006-04-26 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Switch Rd Slate → Global Slate; 2013-06-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Anthony R  Keough → Switch Rd Slate; 2013-06-05 to current/open; source msha-controller-operator-history