# Relationship history for MSHA mine 2103903

Current hierarchy: **GCC SAB de CV → Consolidated Ready Mix → POWERSCREEN**

- 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

- **controller_controls_mine:** GCC SAB de CV → POWERSCREEN; 2006-01-18 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Consolidated Ready Mix → POWERSCREEN; 2017-05-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** GCC SAB de CV → Consolidated Ready Mix; 2017-05-17 to current/open; source msha-controller-operator-history