# Relationship history for MSHA mine 4801624

Current hierarchy: **Basic Energy Inc → Basic Energy Services, L.P. → PS249**

- 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:** First Energy Services Co. → PS249; 2002-06-27 to 2011-03-31; source msha-controller-operator-history
- **controller_controls_mine:** First Energy Services Inc → PS249; 2002-06-27 to 2003-10-02; source msha-controller-operator-history
- **controller_controls_operator:** First Energy Services Inc → First Energy Services Co.; 2002-06-27 to 2003-10-02; source msha-controller-operator-history
- **controller_controls_mine:** Basic Energy Inc → PS249; 2003-10-03 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Basic Energy Inc → First Energy Services Co.; 2003-10-03 to 2011-03-31; source msha-controller-operator-history
- **controller_controls_mine:** Basic Energy Inc → PS249; 2007-09-20 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Basic Energy Services, L.P. → PS249; 2011-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Basic Energy Inc → Basic Energy Services, L.P.; 2011-04-01 to current/open; source msha-controller-operator-history