# Relationship history for MSHA mine 4703780

Current hierarchy: **Edward  McCoy → McCoy's Gravel & Excavating LLC → Screening Plant**

- 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:** McCoy's Gravel & Excavating LLC → Screening Plant; 2016-05-10 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Edward  McCoy → Screening Plant; 2016-05-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Edward  McCoy → McCoy's Gravel & Excavating LLC; 2016-05-10 to current/open; source msha-controller-operator-history