# Relationship history for MSHA mine 4002875

Current hierarchy: **Alpha Natural Resources Holdings, Inc → Tennessee Consolidated Coal Company → Mine #41**

- 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:** Massey Energy Company → Mine #41; 1976-09-01 to 2011-05-31; source msha-controller-operator-history
- **operator_operates_mine:** Tennessee Consolidated Coal Company → Mine #41; 1985-01-01 to 1987-09-23; source msha-controller-operator-history
- **controller_controls_operator:** Massey Energy Company → Tennessee Consolidated Coal Company; 1985-01-01 to 1987-09-23; source msha-controller-operator-history
- **operator_operates_mine:** J & B Coal Company Inc → Mine #41; 1987-09-24 to 1993-04-06; source msha-controller-operator-history
- **controller_controls_mine:** Johnson Alton → Mine #41; 1987-09-24 to 1993-04-06; source msha-controller-operator-history
- **controller_controls_operator:** Johnson Alton → J & B Coal Company Inc; 1987-09-24 to 1993-04-06; source msha-controller-operator-history
- **operator_operates_mine:** Tennessee Consolidated Coal Company → Mine #41; 1993-04-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Massey Energy Company → Tennessee Consolidated Coal Company; 1993-04-07 to 2011-05-31; source msha-controller-operator-history
- **controller_controls_mine:** Alpha Natural Resources, Inc. → Mine #41; 2011-06-01 to 2016-07-25; source msha-controller-operator-history
- **controller_controls_operator:** Alpha Natural Resources, Inc. → Tennessee Consolidated Coal Company; 2011-06-01 to 1987-09-23; source msha-controller-operator-history
- **controller_controls_operator:** Alpha Natural Resources, Inc. → Tennessee Consolidated Coal Company; 2011-06-01 to 2016-07-25; source msha-controller-operator-history
- **controller_controls_mine:** Alpha Natural Resources Holdings, Inc → Mine #41; 2016-07-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Alpha Natural Resources Holdings, Inc → Tennessee Consolidated Coal Company; 2016-07-26 to 1987-09-23; source msha-controller-operator-history
- **controller_controls_operator:** Alpha Natural Resources Holdings, Inc → Tennessee Consolidated Coal Company; 2016-07-26 to current/open; source msha-controller-operator-history