# Relationship history for MSHA mine 1519110

Current hierarchy: **Ronald L  Gray → Three Bells LLC → No 2**

- 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:** Ronald L  Gray → No 2; 2005-07-11 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Three Bells LLC → No 2; 2007-07-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ronald L  Gray → Three Bells LLC; 2007-07-11 to current/open; source msha-controller-operator-history