# Relationship history for MSHA mine 4602560

Current hierarchy: **Alpha Natural Resources Holdings, Inc → Kingwood Mining Company LLC → Albright Preparation 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** Kingwood Mining Company → Albright Preparation Plant; 1950-01-01 to 1983-05-11; source msha-controller-operator-history
- **controller_controls_mine:** PBS Coals Inc (Obsolete-see C15843) → Albright Preparation Plant; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** PBS Coals Inc (Obsolete-see C15843) → Kingwood Mining Company; 1950-01-01 to 1983-05-11; source msha-controller-operator-history
- **controller_controls_mine:** El Paso Energy Corp → Albright Preparation Plant; 1979-10-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Kingwood Mining Company Inc → Albright Preparation Plant; 1983-05-12 to 1985-10-17; source msha-controller-operator-history
- **controller_controls_mine:** NSM PLC → Albright Preparation Plant; 1983-05-12 to 1985-10-17; source msha-controller-operator-history
- **controller_controls_operator:** NSM PLC → Kingwood Mining Company Inc; 1983-05-12 to 1985-10-17; source msha-controller-operator-history
- **operator_operates_mine:** Kingwood Mining Company → Albright Preparation Plant; 1985-10-18 to 1990-01-31; source msha-controller-operator-history
- **controller_controls_mine:** FSS Coal Holding Inc → Albright Preparation Plant; 1985-10-18 to 1992-01-14; source msha-controller-operator-history
- **controller_controls_operator:** FSS Coal Holding Inc → Kingwood Mining Company; 1985-10-18 to 1990-01-31; source msha-controller-operator-history
- **operator_operates_mine:** Coastal Coal-West Virginia LLC → Albright Preparation Plant; 1990-02-01 to 2003-01-31; source msha-controller-operator-history
- **controller_controls_operator:** El Paso Energy Corp → Coastal Coal-West Virginia LLC; 1990-02-01 to 2003-01-31; source msha-controller-operator-history
- **operator_operates_mine:** Kingwood Mining Company LLC → Albright Preparation Plant; 2003-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Alpha Natural Resources, Inc. → Albright Preparation Plant; 2003-02-01 to 2016-07-25; source msha-controller-operator-history
- **controller_controls_operator:** Alpha Natural Resources, Inc. → Kingwood Mining Company LLC; 2003-02-01 to 2016-07-25; source msha-controller-operator-history
- **controller_controls_mine:** Alpha Natural Resources Holdings, Inc → Albright Preparation Plant; 2016-07-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Alpha Natural Resources Holdings, Inc → Kingwood Mining Company LLC; 2016-07-26 to current/open; source msha-controller-operator-history