# Relationship history for MSHA mine 0505130

Current hierarchy: **Harold  Clare; Justin  Clare → AC Concrete & Materials → Snowstorm**

- 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:** AC Concrete & Materials → Snowstorm; 2020-11-02 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Justin  Clare et al → Snowstorm; 2020-11-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Justin  Clare et al → AC Concrete & Materials; 2020-11-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Harold  Clare et al → AC Concrete & Materials; 2020-11-02 to current/open; source msha-controller-operator-history