# Relationship history for MSHA mine 4608284

Current hierarchy: **Pristine Clean Energy LLC → Brooks Run Mining Company LLC → Mine 9B**

- 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 9B; 1980-08-01 to 1996-03-10; source msha-controller-operator-history
- **operator_operates_mine:** Brooks Run Coal Company → Mine 9B; 1993-03-01 to 1994-01-12; source msha-controller-operator-history
- **controller_controls_operator:** El Paso Energy Corp → Brooks Run Coal Company; 1993-03-01 to 1994-01-12; source msha-controller-operator-history
- **controller_controls_mine:** Bruce W  Sigler → Mine 9B; 1993-11-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Bjm Coal Company → Mine 9B; 1994-01-13 to 2003-11-19; source msha-controller-operator-history
- **controller_controls_operator:** Bruce W  Sigler → Bjm Coal Company; 1994-01-13 to 2003-11-19; source msha-controller-operator-history
- **controller_controls_mine:** Alpha Natural Resources, Inc. → Mine 9B; 2003-02-01 to 2016-07-25; source msha-controller-operator-history
- **operator_operates_mine:** Brooks Run Mining Company LLC → Mine 9B; 2003-11-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Alpha Natural Resources, Inc. → Brooks Run Mining Company LLC; 2003-11-20 to 2016-07-25; source msha-controller-operator-history
- **controller_controls_mine:** Alpha Natural Resources Holdings, Inc → Mine 9B; 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 9B; 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