# Relationship history for MSHA mine 2602816

Current hierarchy: **David  Roccio → Las Vegas Crushing Inc. → Portable Crusher 1**

- 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

- **controller_controls_mine:** David  Roccio → Portable Crusher 1; 2012-03-08 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Las Vegas Crushing Inc. → Portable Crusher 1; 2017-08-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** David  Roccio → Las Vegas Crushing Inc.; 2017-08-23 to current/open; source msha-controller-operator-history