# Relationship history for MSHA mine 5400418

Current hierarchy: **Thomas C  Cordero → Cordeco North-West Corp → CORDECO NORTH-WEST**

- 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:** Cordeco North-West Corp → CORDECO NORTH-WEST; 1999-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Thomas C  Cordero → CORDECO NORTH-WEST; 1999-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Thomas C  Cordero → Cordeco North-West Corp; 1999-04-01 to current/open; source msha-controller-operator-history