# Relationship history for MSHA mine 4202528

Current hierarchy: **Summit Materials LLC → Kilgore Contracting → Benjamin**

- 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:** Harold  Elam → Benjamin; 1950-01-01 to 2011-03-31; source msha-controller-operator-history
- **operator_operates_mine:** Kilgore Pavement Maintenance → Benjamin; 2009-08-19 to 2010-08-01; source msha-controller-operator-history
- **controller_controls_mine:** Jason  Kilgore → Benjamin; 2009-08-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jason  Kilgore → Kilgore Pavement Maintenance; 2009-08-19 to 2010-08-01; source msha-controller-operator-history
- **operator_operates_mine:** Kilgore Contracting → Benjamin; 2010-08-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Harold  Elam → Kilgore Contracting; 2010-08-02 to 2011-03-31; source msha-controller-operator-history
- **controller_controls_mine:** Summit Materials LLC → Benjamin; 2011-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Summit Materials LLC → Kilgore Contracting; 2011-04-01 to current/open; source msha-controller-operator-history