# Relationship history for MSHA mine 4105823

Current hierarchy: **The CRC Trust of 2024; The HKC Trust of 2023; Caleb R Curtis → Nickel Rock Materials LLC → Double S 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:** Nickel Rock Materials LLC → Double S Pit; 2025-12-02 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** The HKC Trust of 2023 et al → Double S Pit; 2025-12-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** The HKC Trust of 2023 et al → Nickel Rock Materials LLC; 2025-12-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** The CRC Trust of 2024 et al → Nickel Rock Materials LLC; 2025-12-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Caleb R Curtis et al → Nickel Rock Materials LLC; 2025-12-02 to current/open; source msha-controller-operator-history