# Relationship history for MSHA mine 4300825

Current hierarchy: **Hunter  Kaltsas → Hunter Excavating, Inc → CRUSHING 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:** Hunter  Kaltsas → CRUSHING PLANT 2; 2019-04-30 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Hunter Excavating, Inc → CRUSHING PLANT 2; 2024-04-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Hunter  Kaltsas → Hunter Excavating, Inc; 2024-04-25 to current/open; source msha-controller-operator-history