# Relationship history for MSHA mine 2700457

Current hierarchy: **Linda J.  Cook; Bonnie L.  Milot → Robert Hanson Excavating, Inc. → Hanson Pit**

- 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:** Robert Hanson Excavating, Inc. → Hanson Pit; 2012-10-02 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Bonnie L.  Milot et al → Hanson Pit; 2012-10-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bonnie L.  Milot et al → Robert Hanson Excavating, Inc.; 2012-10-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Linda J.  Cook et al → Robert Hanson Excavating, Inc.; 2012-10-02 to current/open; source msha-controller-operator-history