# Relationship history for MSHA mine 4603140

Current hierarchy: **Lexington Coal Holdings, Inc → Lexington Coal Company, LLC → Spruce Laurel Preparation Plant**

- 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

- **operator_operates_mine:** Westmoreland Coal Company → Spruce Laurel Preparation Plant; 1950-01-01 to 1995-01-02; source msha-controller-operator-history
- **controller_controls_mine:** Westmoreland Coal Company → Spruce Laurel Preparation Plant; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Westmoreland Coal Company → Westmoreland Coal Company; 1950-01-01 to 1995-01-02; source msha-controller-operator-history
- **controller_controls_mine:** Cooper Phillip R → Spruce Laurel Preparation Plant; 1990-05-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Wind River Resources Corp → Spruce Laurel Preparation Plant; 1995-01-03 to 2001-08-13; source msha-controller-operator-history
- **controller_controls_operator:** Cooper Phillip R → Wind River Resources Corp; 1995-01-03 to 2001-08-13; source msha-controller-operator-history
- **operator_operates_mine:** Endurance Mining → Spruce Laurel Preparation Plant; 2001-08-14 to 2011-09-27; source msha-controller-operator-history
- **controller_controls_mine:** Massey Energy Company → Spruce Laurel Preparation Plant; 2001-08-14 to 2011-05-31; source msha-controller-operator-history
- **controller_controls_operator:** Massey Energy Company → Endurance Mining; 2001-08-14 to 2011-05-31; source msha-controller-operator-history
- **controller_controls_mine:** Franklin D  Robertson  et al → Spruce Laurel Preparation Plant; 2003-07-03 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Alpha Natural Resources, Inc. → Spruce Laurel Preparation Plant; 2011-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Alpha Natural Resources, Inc. → Endurance Mining; 2011-06-01 to 2011-09-27; source msha-controller-operator-history
- **operator_operates_mine:** Coal River Mining, LLC → Spruce Laurel Preparation Plant; 2011-09-28 to 2018-05-22; source msha-controller-operator-history
- **controller_controls_operator:** Franklin D  Robertson  et al → Coal River Mining, LLC; 2011-09-28 to 2018-05-22; source msha-controller-operator-history
- **controller_controls_operator:** James O  Bunn  et al → Coal River Mining, LLC; 2011-09-28 to 2018-05-22; source msha-controller-operator-history
- **controller_controls_mine:** Lexington Coal Holdings, Inc → Spruce Laurel Preparation Plant; 2017-10-23 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Lexington Coal Company, LLC → Spruce Laurel Preparation Plant; 2018-05-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lexington Coal Holdings, Inc → Lexington Coal Company, LLC; 2018-05-23 to current/open; source msha-controller-operator-history