# Relationship history for MSHA mine 4105106

Current hierarchy: **Breck  Colquett; Karla  Colquett → Triple C Concrete of Lubbock, Ltd → Pondarosa Pit**

- 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:** Triple C Concrete of Lubbock, Ltd → Pondarosa Pit; 2015-02-04 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Karla  Colquett et al → Pondarosa Pit; 2015-02-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Karla  Colquett et al → Triple C Concrete of Lubbock, Ltd; 2015-02-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Breck  Colquett et al → Triple C Concrete of Lubbock, Ltd; 2015-02-04 to current/open; source msha-controller-operator-history