# Relationship history for MSHA mine 4608823

Current hierarchy: **Pristine Clean Energy LLC → Brooks Run Mining Company LLC → Mine No 4A West**

- 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:** El Paso Energy Corp → Mine No 4A West; 1979-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Thomas G  Toler → Mine No 4A West; 1983-10-05 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** D & K Coal Company Inc → Mine No 4A West; 2000-03-01 to 2001-05-24; source msha-controller-operator-history
- **controller_controls_operator:** Thomas G  Toler → D & K Coal Company Inc; 2000-03-01 to 2001-05-24; source msha-controller-operator-history
- **operator_operates_mine:** Coastal Coal-West Virginia, LLC → Mine No 4A West; 2001-05-25 to 2003-01-31; source msha-controller-operator-history
- **controller_controls_operator:** El Paso Energy Corp → Coastal Coal-West Virginia, LLC; 2001-05-25 to 2003-01-31; source msha-controller-operator-history
- **operator_operates_mine:** Brooks Run Mining Company LLC → Mine No 4A West; 2003-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Alpha Natural Resources, Inc. → Mine No 4A West; 2003-02-01 to 2016-07-25; source msha-controller-operator-history
- **controller_controls_operator:** Alpha Natural Resources, Inc. → Brooks Run Mining Company LLC; 2003-02-01 to 2016-07-25; source msha-controller-operator-history
- **controller_controls_mine:** Alpha Natural Resources Holdings, Inc → Mine No 4A West; 2016-07-26 to 2017-10-04; source msha-controller-operator-history
- **controller_controls_operator:** Alpha Natural Resources Holdings, Inc → Brooks Run Mining Company LLC; 2016-07-26 to 2017-10-04; source msha-controller-operator-history
- **controller_controls_mine:** Pristine Clean Energy LLC → Mine No 4A West; 2017-10-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Pristine Clean Energy LLC → Brooks Run Mining Company LLC; 2017-10-05 to current/open; source msha-controller-operator-history