# Relationship history for MSHA mine 4202627

Current hierarchy: **Ultra Alegre Trust; Brett  John → Washco Rock, LLC → Washco Rock Pits**

- 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:** Washco Rock, LLC → Washco Rock Pits; 2014-04-14 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Brett  John et al → Washco Rock Pits; 2014-04-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Brett  John et al → Washco Rock, LLC; 2014-04-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ultra Alegre Trust et al → Washco Rock, LLC; 2014-04-14 to current/open; source msha-controller-operator-history