# Relationship history for MSHA mine 5100253

Current hierarchy: **Christian D  Twigg Smith → CTS Earthmoving Inc → Mobile Crusher Two**

- 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:** Christian D  Twigg Smith → Mobile Crusher Two; 2003-05-14 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** CTS Earthmoving Inc → Mobile Crusher Two; 2005-05-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Christian D  Twigg Smith → CTS Earthmoving Inc; 2005-05-23 to current/open; source msha-controller-operator-history