# Relationship history for MSHA mine 0504857

Current hierarchy: **Bill H  Tenore → T Bone Stone → TBS 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:** Bill H  Tenore → TBS 2; 1999-11-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** T Bone Stone → TBS 2; 2006-10-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bill H  Tenore → T Bone Stone; 2006-10-11 to current/open; source msha-controller-operator-history