# Relationship history for MSHA mine 4702673

Current hierarchy: **Floyd  Plautz → Plautz-Pekol Inc → MOBILE UNIT #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:** Plautz-Pekol Inc → MOBILE UNIT #1; 1980-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Floyd  Plautz → MOBILE UNIT #1; 1980-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Floyd  Plautz → Plautz-Pekol Inc; 1980-05-01 to current/open; source msha-controller-operator-history