# Relationship history for MSHA mine 4607165

Current hierarchy: **Lexington Coal Holdings, Inc → Lexington Coal Company, LLC → North Surface Mine**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Dehart Virgil Et Al → North Surface Mine; 1984-05-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Magnet Coal Inc → North Surface Mine; 1986-07-01 to 1991-10-09; source msha-controller-operator-history
- **controller_controls_operator:** Dehart Virgil Et Al → Magnet Coal Inc; 1986-07-01 to 1991-10-09; source msha-controller-operator-history
- **operator_operates_mine:** Magnet Coal Inc → North Surface Mine; 1991-10-10 to 1996-08-31; source msha-controller-operator-history
- **controller_controls_mine:** Everett Gordon Justice → North Surface Mine; 1991-10-10 to 1996-08-31; source msha-controller-operator-history
- **controller_controls_operator:** Everett Gordon Justice → Magnet Coal Inc; 1991-10-10 to 1996-08-31; source msha-controller-operator-history
- **operator_operates_mine:** Magnet Coal Inc → North Surface Mine; 1996-09-01 to 1999-02-16; source msha-controller-operator-history
- **controller_controls_mine:** Melton Stephen J → North Surface Mine; 1996-09-01 to 1999-02-16; source msha-controller-operator-history
- **controller_controls_operator:** Melton Stephen J → Magnet Coal Inc; 1996-09-01 to 1999-02-16; source msha-controller-operator-history
- **controller_controls_mine:** Massey Energy Company → North Surface Mine; 1997-10-20 to 2011-05-31; source msha-controller-operator-history
- **controller_controls_mine:** Massey Energy Company → North Surface Mine; 1998-05-07 to 2011-05-31; source msha-controller-operator-history
- **operator_operates_mine:** Alex Energy Inc → North Surface Mine; 1999-02-17 to 2013-12-31; source msha-controller-operator-history
- **controller_controls_operator:** Massey Energy Company → Alex Energy Inc; 1999-02-17 to 2011-05-31; source msha-controller-operator-history
- **controller_controls_mine:** Alpha Natural Resources, Inc. → North Surface Mine; 2011-06-01 to 2016-07-25; source msha-controller-operator-history
- **controller_controls_operator:** Alpha Natural Resources, Inc. → Alex Energy Inc; 2011-06-01 to 2013-12-31; source msha-controller-operator-history
- **operator_operates_mine:** Highland Mining Company → North Surface Mine; 2014-01-01 to 2017-10-22; source msha-controller-operator-history
- **controller_controls_operator:** Alpha Natural Resources, Inc. → Highland Mining Company; 2014-01-01 to 2016-07-25; source msha-controller-operator-history
- **controller_controls_operator:** Massey Energy Company → Highland Mining Company; 2014-01-01 to 2011-05-31; source msha-controller-operator-history
- **controller_controls_mine:** Alpha Natural Resources Holdings, Inc → North Surface Mine; 2016-07-26 to 2018-11-08; source msha-controller-operator-history
- **controller_controls_operator:** Alpha Natural Resources Holdings, Inc → Alex Energy Inc; 2016-07-26 to 2013-12-31; source msha-controller-operator-history
- **controller_controls_operator:** Alpha Natural Resources Holdings, Inc → Highland Mining Company; 2016-07-26 to 2017-10-22; source msha-controller-operator-history
- **operator_operates_mine:** Lexington Coal Company, LLC → North Surface Mine; 2017-10-23 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Lexington Coal Holdings, Inc → North Surface Mine; 2017-10-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lexington Coal Holdings, Inc → Lexington Coal Company, LLC; 2017-10-23 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Alpha Metallurgical Resources Inc → North Surface Mine; 2018-11-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Alpha Metallurgical Resources Inc → Alex Energy Inc; 2018-11-09 to 2013-12-31; source msha-controller-operator-history
- **controller_controls_operator:** Alpha Metallurgical Resources Inc → Highland Mining Company; 2018-11-09 to 2017-10-22; source msha-controller-operator-history