# Relationship history for MSHA mine 3402218

Current hierarchy: **Zach R  Ham → Stone works llc → Carr Creek Mine**

- 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:** Stone works llc → Carr Creek Mine; 2021-12-06 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Zach R  Ham → Carr Creek Mine; 2021-12-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Zach R  Ham → Stone works llc; 2021-12-06 to current/open; source msha-controller-operator-history