# Relationship history for MSHA mine 4105042

Current hierarchy: **Daniel L  Robertson → Kickin A → Kickin A Materials**

- 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

- **operator_operates_mine:** Kickin A → Kickin A Materials; 2013-11-11 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Daniel L  Robertson → Kickin A Materials; 2013-11-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Daniel L  Robertson → Kickin A; 2013-11-11 to current/open; source msha-controller-operator-history