# Relationship history for MSHA mine 4406594

Current hierarchy: **Alpha Natural Resources, Inc. → Big Laurel Mining Corp → Mine No 1**

- 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:** Wesley D.  Burke et al → Mine No 1; 1982-10-12 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Southmountain Coal Company Inc → Mine No 1; 1990-08-01 to 1993-03-31; source msha-controller-operator-history
- **controller_controls_operator:** Wesley D.  Burke et al → Southmountain Coal Company Inc; 1990-08-01 to 1993-03-31; source msha-controller-operator-history
- **operator_operates_mine:** Big Laurel Mining Corp → Mine No 1; 1993-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Cumberland Resources Corporation → Mine No 1; 1993-04-01 to 2010-04-18; source msha-controller-operator-history
- **controller_controls_operator:** Cumberland Resources Corporation → Big Laurel Mining Corp; 1993-04-01 to 2010-04-18; source msha-controller-operator-history
- **controller_controls_mine:** Massey Energy Company → Mine No 1; 2010-04-19 to 2011-05-31; source msha-controller-operator-history
- **controller_controls_operator:** Massey Energy Company → Big Laurel Mining Corp; 2010-04-19 to 2011-05-31; source msha-controller-operator-history
- **controller_controls_mine:** Alpha Natural Resources, Inc. → Mine No 1; 2011-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Alpha Natural Resources, Inc. → Big Laurel Mining Corp; 2011-06-01 to current/open; source msha-controller-operator-history