# Relationship history for MSHA mine 2104110

Current hierarchy: **Steven  Westlund → Westlund Excavating LLC → Westlund Portable 2**

- 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:** Steven  Westlund → Westlund Portable 2; 2024-03-27 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Westlund Excavating LLC → Westlund Portable 2; 2025-09-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Steven  Westlund → Westlund Excavating LLC; 2025-09-16 to current/open; source msha-controller-operator-history