# Relationship history for MSHA mine 4406846

Current hierarchy: **Alpha Natural Resources, Inc. → Paramont Coal Company Virginia, LLC → Deep Mine #27**

- 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:** Pittston Company → Deep Mine #27; 1986-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Cumberland Resources Corporation → Deep Mine #27; 1994-07-01 to 2010-04-18; source msha-controller-operator-history
- **operator_operates_mine:** Dorchester Enterprises Inc → Deep Mine #27; 1996-08-01 to 1998-02-19; source msha-controller-operator-history
- **controller_controls_operator:** Cumberland Resources Corporation → Dorchester Enterprises Inc; 1996-08-01 to 1998-02-19; source msha-controller-operator-history
- **operator_operates_mine:** Paramont Coal Corp → Deep Mine #27; 1998-02-20 to 2002-12-12; source msha-controller-operator-history
- **controller_controls_operator:** Pittston Company → Paramont Coal Corp; 1998-02-20 to 2002-12-12; source msha-controller-operator-history
- **operator_operates_mine:** Paramont Coal Company Virginia, LLC → Deep Mine #27; 2002-12-13 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Alpha Natural Resources, Inc. → Deep Mine #27; 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
- **controller_controls_mine:** Massey Energy Company → Deep Mine #27; 2010-04-19 to 2011-05-31; source msha-controller-operator-history
- **controller_controls_operator:** Massey Energy Company → Dorchester Enterprises Inc; 2010-04-19 to 1998-02-19; source msha-controller-operator-history
- **controller_controls_mine:** Alpha Natural Resources, Inc. → Deep Mine #27; 2011-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Alpha Natural Resources, Inc. → Dorchester Enterprises Inc; 2011-06-01 to 1998-02-19; source msha-controller-operator-history