# Relationship history for MSHA mine 4609556

Current hierarchy: **Mohegan Energy Trustees LLC → ONYX ENERGY, LLC → OLAN PROCESSING PLANT**

- 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 → OLAN PROCESSING PLANT; 2008-12-04 to 2018-05-15; source msha-controller-operator-history
- **controller_controls_mine:** Richard G  Preservati II → OLAN PROCESSING PLANT; 2013-08-30 to 2018-05-15; source msha-controller-operator-history
- **controller_controls_mine:** Mohegan Energy Trustees LLC → OLAN PROCESSING PLANT; 2018-05-16 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Star Services, LLC → OLAN PROCESSING PLANT; 2018-10-26 to 2022-12-05; source msha-controller-operator-history
- **controller_controls_operator:** Mohegan Energy Trustees LLC → Star Services, LLC; 2018-10-26 to 2022-12-05; source msha-controller-operator-history
- **controller_controls_operator:** Richard G  Preservati II → Star Services, LLC; 2018-10-26 to 2018-05-15; source msha-controller-operator-history
- **operator_operates_mine:** Onyx Energy, LLC → OLAN PROCESSING PLANT; 2022-12-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mohegan Energy Trustees LLC → Onyx Energy, LLC; 2022-12-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Richard G  Preservati II → Onyx Energy, LLC; 2022-12-06 to 2018-05-15; source msha-controller-operator-history