# Relationship history for MSHA mine 4405270

Current hierarchy: **Alpha Metallurgical Resources Inc → Paramont Contura, LLC → TOMS CREEK COMPLEX**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Coastal Coal Company, LLC → TOMS CREEK COMPLEX; 1979-06-01 to 2003-01-31; source msha-controller-operator-history
- **controller_controls_mine:** El Paso Energy Corp → TOMS CREEK COMPLEX; 1989-04-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** El Paso Energy Corp → Coastal Coal Company, LLC; 1989-04-04 to 2003-01-31; source msha-controller-operator-history
- **controller_controls_mine:** Alpha Natural Resources, Inc. → TOMS CREEK COMPLEX; 2002-12-13 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Paramont Coal Company Virginia, LLC → TOMS CREEK COMPLEX; 2003-02-01 to 2016-07-25; source msha-controller-operator-history
- **controller_controls_operator:** Alpha Natural Resources, Inc. → Paramont Coal Company Virginia, LLC; 2003-02-01 to 2016-07-25; source msha-controller-operator-history
- **operator_operates_mine:** Paramont Contura, LLC → TOMS CREEK COMPLEX; 2016-07-26 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Alpha Metallurgical Resources Inc → TOMS CREEK COMPLEX; 2016-07-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Alpha Metallurgical Resources Inc → Paramont Contura, LLC; 2016-07-26 to current/open; source msha-controller-operator-history