# Relationship history for MSHA mine 0103480

Current hierarchy: **John  Christmas; Steven  Smith → MS Industries II, LLC → Masterson Site**

- 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:** MS Industries II, LLC → Masterson Site; 2014-10-10 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** John  Christmas et al → Masterson Site; 2014-10-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** John  Christmas et al → MS Industries II, LLC; 2014-10-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Steven  Smith et al → MS Industries II, LLC; 2014-10-10 to current/open; source msha-controller-operator-history