# Relationship history for MSHA mine 0203174

Current hierarchy: **Frank R  DalMolin → DalMolin Excavating, Inc. → DalMolin Evcavating, Inc.**

- 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:** DalMolin Excavating Inc → DalMolin Evcavating, Inc.; 2007-04-03 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Frank R  DalMolin → DalMolin Evcavating, Inc.; 2007-04-03 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Frank R  DalMolin → DalMolin Excavating Inc; 2007-04-03 to current/open; source msha-controller-operator-history