# Relationship history for MSHA mine 1518161

Current hierarchy: **Bennett  Quillen → Panzer Coal Inc → No 2**

- 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 → No 2; 1989-04-04 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Coastal Coal Company, LLC → No 2; 1999-04-01 to 2003-01-31; source msha-controller-operator-history
- **controller_controls_operator:** El Paso Energy Corp → Coastal Coal Company, LLC; 1999-04-01 to 2003-01-31; source msha-controller-operator-history
- **controller_controls_mine:** Amfire LLC → No 2; 2003-01-31 to 2003-01-31; source msha-controller-operator-history
- **operator_operates_mine:** Enterprise Mining Company LLC → No 2; 2003-02-01 to 2008-06-03; source msha-controller-operator-history
- **controller_controls_mine:** Alpha Natural Resources, Inc. → No 2; 2003-02-01 to 2016-07-25; source msha-controller-operator-history
- **controller_controls_operator:** Alpha Natural Resources, Inc. → Enterprise Mining Company LLC; 2003-02-01 to 2008-06-03; source msha-controller-operator-history
- **controller_controls_operator:** Amfire LLC → Enterprise Mining Company LLC; 2003-02-01 to 2003-01-31; source msha-controller-operator-history
- **controller_controls_mine:** Colette  Quillen → No 2; 2005-07-26 to 2008-06-03; source msha-controller-operator-history
- **operator_operates_mine:** Panzer Coal Inc → No 2; 2008-06-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Colette  Quillen → Panzer Coal Inc; 2008-06-04 to 2008-06-03; source msha-controller-operator-history
- **controller_controls_mine:** Bennett  Quillen → No 2; 2008-06-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bennett  Quillen → Panzer Coal Inc; 2008-06-04 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Alpha Natural Resources Holdings, Inc → No 2; 2016-07-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Alpha Natural Resources Holdings, Inc → Enterprise Mining Company LLC; 2016-07-26 to 2008-06-03; source msha-controller-operator-history