# Relationship history for MSHA mine 4403328

Current hierarchy: **Alpha Natural Resources, Inc. → Paramont Coal Company Virginia, LLC → Greenbrier Dock**

- 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:** Clinchfield Coal Company → Greenbrier Dock; 1950-01-01 to 1989-07-18; source msha-controller-operator-history
- **controller_controls_mine:** Pittston Company → Greenbrier Dock; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Pittston Company → Clinchfield Coal Company; 1950-01-01 to 1989-07-18; source msha-controller-operator-history
- **controller_controls_mine:** Pittston Company → Greenbrier Dock; 1985-10-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Cecil Construction Inc → Greenbrier Dock; 1989-07-19 to 1991-04-30; source msha-controller-operator-history
- **controller_controls_mine:** Jack W  Cecil Jr → Greenbrier Dock; 1989-07-19 to 1991-04-30; source msha-controller-operator-history
- **controller_controls_operator:** Jack W  Cecil Jr → Cecil Construction Inc; 1989-07-19 to 1991-04-30; source msha-controller-operator-history
- **operator_operates_mine:** Motivation Coal Company → Greenbrier Dock; 1991-05-01 to 2002-12-12; source msha-controller-operator-history
- **controller_controls_operator:** Pittston Company → Motivation Coal Company; 1991-05-01 to 2002-12-12; source msha-controller-operator-history
- **operator_operates_mine:** Paramont Coal Company Virginia, LLC → Greenbrier Dock; 2002-12-13 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Alpha Natural Resources, Inc. → Greenbrier Dock; 2002-12-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Alpha Natural Resources, Inc. → Paramont Coal Company Virginia, LLC; 2002-12-13 to current/open; source msha-controller-operator-history