# Relationship history for MSHA mine 4104268

Current hierarchy: **Kelly A  Hendley → TQP-Crosby, LP → TQP - Crosby**

- 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:** Kelly A  Hendley → TQP - Crosby; 1991-08-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Texas Quality Products Inc → TQP - Crosby; 2001-02-01 to 2011-03-13; source msha-controller-operator-history
- **controller_controls_operator:** Kelly A  Hendley → Texas Quality Products Inc; 2001-02-01 to 2011-03-13; source msha-controller-operator-history
- **operator_operates_mine:** TQP-Crosby, LP → TQP - Crosby; 2011-03-14 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Kelly A  Hendley → TQP - Crosby; 2011-03-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kelly A  Hendley → TQP-Crosby, LP; 2011-03-14 to current/open; source msha-controller-operator-history