# Relationship history for MSHA mine 2700558

Current hierarchy: **Jeremy J  Hiltz → Jeremy Hiltz Excavating → 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:** Jeremy J  Hiltz → Portable Plant # 2; 2007-05-30 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Jeremy Hiltz Excavating → Portable Plant # 2; 2024-05-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jeremy J  Hiltz → Jeremy Hiltz Excavating; 2024-05-06 to current/open; source msha-controller-operator-history