# Relationship history for MSHA mine 0203548

Current hierarchy: **Cody  Johnson → Cornerstone Aggregates Inc → Cornerstone Wellton 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:** Cornerstone Aggregates Inc → Cornerstone Wellton Mine; 2026-06-26 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Cody  Johnson → Cornerstone Wellton Mine; 2026-06-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Cody  Johnson → Cornerstone Aggregates Inc; 2026-06-26 to current/open; source msha-controller-operator-history