# Relationship history for MSHA mine 4609130

Current hierarchy: **Pristine Clean Energy LLC → Birch River Energy LLC → Brandy Station**

- 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:** Alpha Natural Resources, Inc. → Brandy Station; 2003-02-01 to 2016-07-25; source msha-controller-operator-history
- **operator_operates_mine:** Birch River Energy LLC → Brandy Station; 2005-11-03 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Alpha Natural Resources, Inc. → Birch River Energy LLC; 2005-11-03 to 2016-07-25; source msha-controller-operator-history
- **controller_controls_mine:** Alpha Natural Resources Holdings, Inc → Brandy Station; 2016-07-26 to 2017-10-04; source msha-controller-operator-history
- **controller_controls_operator:** Alpha Natural Resources Holdings, Inc → Birch River Energy LLC; 2016-07-26 to 2017-10-04; source msha-controller-operator-history
- **controller_controls_mine:** Pristine Clean Energy LLC → Brandy Station; 2017-10-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Pristine Clean Energy LLC → Birch River Energy LLC; 2017-10-05 to current/open; source msha-controller-operator-history