# Relationship history for MSHA mine 4801879

Current hierarchy: **Ryan J  Ozbun → LOUDWIRE DIESEL LLC → Portable Crusher number 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:** Ryan J  Ozbun → Portable Crusher number 1; 2022-07-12 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** LOUDWIRE DIESEL LLC → Portable Crusher number 1; 2024-04-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ryan J  Ozbun → LOUDWIRE DIESEL LLC; 2024-04-19 to current/open; source msha-controller-operator-history