# Relationship history for MSHA mine 4601939

Current hierarchy: **David J Stone → SNR Stonecoal LLC → STONECOAL**

- 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

- **operator_operates_mine:** Vantage Mining Company → STONECOAL; 1950-01-01 to 1990-02-08; source msha-controller-operator-history
- **controller_controls_mine:** Pittston Company → STONECOAL; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Pittston Company → Vantage Mining Company; 1950-01-01 to 1990-02-08; source msha-controller-operator-history
- **operator_operates_mine:** Vantage Mining Company → STONECOAL; 1990-02-09 to 1991-01-13; source msha-controller-operator-history
- **controller_controls_mine:** Massey Energy Company → STONECOAL; 1990-02-09 to 1991-01-13; source msha-controller-operator-history
- **controller_controls_operator:** Massey Energy Company → Vantage Mining Company; 1990-02-09 to 1991-01-13; source msha-controller-operator-history
- **operator_operates_mine:** Wayne Processing Inc → STONECOAL; 1991-01-14 to 1996-02-04; source msha-controller-operator-history
- **controller_controls_mine:** Rex  Fought → STONECOAL; 1991-01-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Rex  Fought → Wayne Processing Inc; 1991-01-14 to 1996-02-04; source msha-controller-operator-history
- **operator_operates_mine:** Spartan Mining Company → STONECOAL; 1996-02-05 to 2014-01-07; source msha-controller-operator-history
- **controller_controls_mine:** Massey Energy Company → STONECOAL; 1996-02-05 to 2011-05-31; source msha-controller-operator-history
- **controller_controls_operator:** Massey Energy Company → Spartan Mining Company; 1996-02-05 to 2011-05-31; source msha-controller-operator-history
- **controller_controls_mine:** Alpha Natural Resources, Inc. → STONECOAL; 2011-06-01 to 2016-07-25; source msha-controller-operator-history
- **controller_controls_operator:** Alpha Natural Resources, Inc. → Spartan Mining Company; 2011-06-01 to 2014-01-07; source msha-controller-operator-history
- **controller_controls_mine:** Dennis  Johnson → STONECOAL; 2013-01-29 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** APPALACHIAN MINING & RECLAMATION, LLC → STONECOAL; 2014-01-08 to 2017-08-17; source msha-controller-operator-history
- **controller_controls_operator:** Dennis  Johnson → APPALACHIAN MINING & RECLAMATION, LLC; 2014-01-08 to 2017-08-17; source msha-controller-operator-history
- **controller_controls_mine:** Alpha Natural Resources Holdings, Inc → STONECOAL; 2016-07-26 to 2018-11-08; source msha-controller-operator-history
- **controller_controls_operator:** Alpha Natural Resources Holdings, Inc → Spartan Mining Company; 2016-07-26 to 2014-01-07; source msha-controller-operator-history
- **operator_operates_mine:** SNR Stonecoal LLC → STONECOAL; 2017-08-18 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** David J Stone → STONECOAL; 2017-08-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** David J Stone → SNR Stonecoal LLC; 2017-08-18 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Alpha Metallurgical Resources Inc → STONECOAL; 2018-11-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Alpha Metallurgical Resources Inc → Spartan Mining Company; 2018-11-09 to 2014-01-07; source msha-controller-operator-history