# Relationship history for MSHA mine 3304810

Current hierarchy: **Oliver John  McIvor → AGGCORP Equipment Systems, Inc. → 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

- **operator_operates_mine:** AGGCORP Equipment Systems, Inc. → Crusher 1; 2025-05-29 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Oliver John  McIvor → Crusher 1; 2025-05-29 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Oliver John  McIvor → AGGCORP Equipment Systems, Inc.; 2025-05-29 to current/open; source msha-controller-operator-history