# Relationship history for MSHA mine 4002934

Current hierarchy: **Massey Energy Company → Tennessee Energy Corp → Mine No 78**

- 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 No 78; 1976-09-01 to 2011-05-31; source msha-controller-operator-history
- **operator_operates_mine:** Tennessee Consolidated Coal Company → Mine No 78; 1986-08-01 to 1987-08-12; source msha-controller-operator-history
- **controller_controls_operator:** Massey Energy Company → Tennessee Consolidated Coal Company; 1986-08-01 to 1987-08-12; source msha-controller-operator-history
- **controller_controls_mine:** Rogers Hollis → Mine No 78; 1987-07-13 to 1995-08-31; source msha-controller-operator-history
- **operator_operates_mine:** Kellys Creek Resources Inc → Mine No 78; 1987-08-13 to 1995-08-31; source msha-controller-operator-history
- **controller_controls_operator:** Rogers Hollis → Kellys Creek Resources Inc; 1987-08-13 to 1995-08-31; source msha-controller-operator-history
- **controller_controls_mine:** Massey Energy Company → Mine No 78; 1992-05-08 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Tennessee Energy Corp → Mine No 78; 1995-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Massey Energy Company → Tennessee Energy Corp; 1995-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Alpha Natural Resources, Inc. → Mine No 78; 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 1987-08-12; source msha-controller-operator-history
- **controller_controls_mine:** Alpha Natural Resources Holdings, Inc → Mine No 78; 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 1987-08-12; source msha-controller-operator-history