# Relationship history for MSHA mine 4801727

Current hierarchy: **Ken (Butch)  Tilton → Tilton Readymix → Tilton Readymix**

- 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:** Tilton Ready Mix of Carbon County → Tilton Readymix; 2008-04-30 to 2010-04-20; source msha-controller-operator-history
- **controller_controls_mine:** Ken (Butch)  Tilton → Tilton Readymix; 2008-04-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ken (Butch)  Tilton → Tilton Ready Mix of Carbon County; 2008-04-30 to 2010-04-20; source msha-controller-operator-history
- **operator_operates_mine:** Tilton Readymix → Tilton Readymix; 2010-04-21 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Ken (Butch)  Tilton → Tilton Readymix; 2010-04-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ken (Butch)  Tilton → Tilton Readymix; 2010-04-21 to current/open; source msha-controller-operator-history