# Relationship history for MSHA mine 4003120

Current hierarchy: **Alpha Natural Resources Holdings, Inc → Tennessee Consolidated Coal Company → Kelley Creek Strip Mine No 3**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-18T09:31:49.615908+00:00

## Valid-time edges

- **controller_controls_mine:** Massey Energy Company → Kelley Creek Strip Mine No 3; 1976-09-01 to 2011-05-31; source msha-controller-operator-history
- **operator_operates_mine:** Tennessee Consolidated Coal Company → Kelley Creek Strip Mine No 3; 1998-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Massey Energy Company → Tennessee Consolidated Coal Company; 1998-02-01 to 2011-05-31; source msha-controller-operator-history
- **controller_controls_mine:** Alpha Natural Resources, Inc. → Kelley Creek Strip Mine No 3; 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 2016-07-25; source msha-controller-operator-history
- **controller_controls_mine:** Alpha Natural Resources Holdings, Inc → Kelley Creek Strip Mine No 3; 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 current/open; source msha-controller-operator-history