# Relationship history for MSHA mine 2401755

Current hierarchy: **Hansen Howard & Rick Maestas → A & H Enterprise → A & H Placer**

- 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:** A & H Enterprise → A & H Placer; 1984-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Hansen Howard & Rick Maestas → A & H Placer; 1984-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Hansen Howard & Rick Maestas → A & H Enterprise; 1984-02-01 to current/open; source msha-controller-operator-history