# Relationship history for MSHA mine 4103962

Current hierarchy: **Henry  Trujillo → Henry Trujillo Trucking → TRUJILLO SAND & GRAVEL PIT**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-18T09:31:49.615908+00:00

## Valid-time edges

- **operator_operates_mine:** Henry Trujillo Trucking → TRUJILLO SAND & GRAVEL PIT; 1997-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Henry  Trujillo → TRUJILLO SAND & GRAVEL PIT; 1997-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Henry  Trujillo → Henry Trujillo Trucking; 1997-09-01 to current/open; source msha-controller-operator-history