# Relationship history for MSHA mine 2700474

Current hierarchy: **Constantine  Halvatzes → CSSI Contractors → CSSI-12**

- 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:** CSSI Contractors → CSSI-12; 2013-07-08 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Constantine  Halvatzes → CSSI-12; 2013-07-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Constantine  Halvatzes → CSSI Contractors; 2013-07-08 to current/open; source msha-controller-operator-history