# Relationship history for MSHA mine 4801613

Current hierarchy: **Cyral  Callender → Callender Construction LLC → Callender 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:** Callender Construction LLC → Callender Mine; 2002-01-25 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Cyral  Callender → Callender Mine; 2002-01-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Cyral  Callender → Callender Construction LLC; 2002-01-25 to current/open; source msha-controller-operator-history