# Relationship history for MSHA mine 1901191

Current hierarchy: **Jerome J  Gagliarducci → GAGLIARDUCCI CONSTRUCTION, INC. → METSO LT106 #78466**

- 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:** Jerome J  Gagliarducci et al → METSO LT106 #78466; 2006-08-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Gagliarducci Construction, Inc. → METSO LT106 #78466; 2009-07-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jerome J  Gagliarducci et al → Gagliarducci Construction, Inc.; 2009-07-22 to current/open; source msha-controller-operator-history