# Relationship history for MSHA mine 4200856

Current hierarchy: **Chris  Mendius; Steven B Garnett; Todd E Kokes → Silbrico Corporation → North Pearl Queen**

- 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:** Mendius Carl Jr → North Pearl Queen; 1950-01-01 to 2024-10-08; source msha-controller-operator-history
- **operator_operates_mine:** C & K Mining Co → North Pearl Queen; 1950-01-01 to 2024-10-08; source msha-controller-operator-history
- **controller_controls_mine:** C & K Mining Co → North Pearl Queen; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** C & K Mining Co → C & K Mining Co; 1950-01-01 to 2024-10-08; source msha-controller-operator-history
- **operator_operates_mine:** Silbrico Corporation → North Pearl Queen; 2024-10-09 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Steven B Garnett et al → North Pearl Queen; 2024-10-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Steven B Garnett et al → Silbrico Corporation; 2024-10-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Chris  Mendius et al → Silbrico Corporation; 2024-10-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Todd E Kokes et al → Silbrico Corporation; 2024-10-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mendius Carl Jr → Silbrico Corporation; 2024-10-09 to 2024-10-08; source msha-controller-operator-history