# Relationship history for MSHA mine 1103302

Current hierarchy: **Artem  Zakharov → AZ Hard Rock Inc. → AZ Hard Rock Inc.**

- 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:** Liberty Aggregate Services → AZ Hard Rock Inc.; 2020-08-20 to 2024-02-04; source msha-controller-operator-history
- **controller_controls_mine:** David  Hamman et al → AZ Hard Rock Inc.; 2020-08-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** David  Hamman et al → Liberty Aggregate Services; 2020-08-20 to 2024-02-04; source msha-controller-operator-history
- **controller_controls_operator:** James  Hamman et al → Liberty Aggregate Services; 2020-08-20 to 2024-02-04; source msha-controller-operator-history
- **operator_operates_mine:** AZ Hard Rock Inc. → AZ Hard Rock Inc.; 2024-02-05 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Artem  Zakharov → AZ Hard Rock Inc.; 2024-02-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Artem  Zakharov → AZ Hard Rock Inc.; 2024-02-05 to current/open; source msha-controller-operator-history