# Relationship history for MSHA mine 4405608

Current hierarchy: **Mason Resource Investments LLC → Southwest Virginia Mining Company, LLC → English Branch Prep 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Sunoco, Inc. → English Branch Prep Plant; 1979-10-17 to 2012-01-16; source msha-controller-operator-history
- **operator_operates_mine:** Jewell Smokeless Coal Corp → English Branch Prep Plant; 1981-04-01 to 2023-01-25; source msha-controller-operator-history
- **controller_controls_operator:** Sunoco, Inc. → Jewell Smokeless Coal Corp; 1981-04-01 to 2012-01-16; source msha-controller-operator-history
- **controller_controls_mine:** SunCoke Energy Incorporated → English Branch Prep Plant; 2012-01-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** SunCoke Energy Incorporated → Jewell Smokeless Coal Corp; 2012-01-17 to 2023-01-25; source msha-controller-operator-history
- **operator_operates_mine:** Southwest Virginia Mining Company, LLC → English Branch Prep Plant; 2023-01-26 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Mason Resource Investments LLC → English Branch Prep Plant; 2023-01-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mason Resource Investments LLC → Southwest Virginia Mining Company, LLC; 2023-01-26 to current/open; source msha-controller-operator-history