# Relationship history for MSHA mine 3700180

Current hierarchy: **Stephen A  Cardi → Cardi Corp → CARDI CORPORATION**

- 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:** Cardi Corp → CARDI CORPORATION; 1981-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Stephen A  Cardi  et al → CARDI CORPORATION; 1981-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Stephen A  Cardi  et al → Cardi Corp; 1981-05-01 to current/open; source msha-controller-operator-history