# Relationship history for MSHA mine 1202370

Current hierarchy: **Randy  Julian → Julian Earthwork, Inc. → Portable Plant #2**

- 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:** Randy  Julian → Portable Plant #2; 1990-05-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Julian Earthwork, Inc. → Portable Plant #2; 2005-02-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Randy  Julian → Julian Earthwork, Inc.; 2005-02-09 to current/open; source msha-controller-operator-history