# Relationship history for MSHA mine 4609568

Current hierarchy: **Mohegan Energy Trustees LLC → Onyx Energy, LLC → Saturn Surface Mine**

- 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:** Richard G  Preservati II → Saturn Surface Mine; 2008-12-04 to 2018-05-15; source msha-controller-operator-history
- **controller_controls_mine:** Mohegan Energy Trustees LLC → Saturn Surface Mine; 2018-05-16 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Onyx Energy, LLC → Saturn Surface Mine; 2019-05-02 to 2025-07-26; source msha-controller-operator-history
- **controller_controls_operator:** Mohegan Energy Trustees LLC → Onyx Energy, LLC; 2019-05-02 to 2025-07-26; source msha-controller-operator-history
- **controller_controls_operator:** Richard G  Preservati II → Onyx Energy, LLC; 2019-05-02 to 2018-05-15; source msha-controller-operator-history
- **controller_controls_mine:** John  Stone → Saturn Surface Mine; 2024-02-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Stacy Equipment and Repairs, Incorporated → Saturn Surface Mine; 2025-07-27 to 2026-04-01; source msha-controller-operator-history
- **controller_controls_operator:** John  Stone → Stacy Equipment and Repairs, Incorporated; 2025-07-27 to 2026-04-01; source msha-controller-operator-history
- **operator_operates_mine:** Onyx Energy, LLC → Saturn Surface Mine; 2026-04-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mohegan Energy Trustees LLC → Onyx Energy, LLC; 2026-04-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Richard G  Preservati II → Onyx Energy, LLC; 2026-04-02 to 2018-05-15; source msha-controller-operator-history