# Relationship history for MSHA mine 0600734

Current hierarchy: **Jerome J  Gagliarducci → Gagliarducci Construction, Inc → Adams Materials**

- 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:** Gagliarducci Construction, Inc → Adams Materials; 2006-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Jerome J  Gagliarducci et al → Adams Materials; 2006-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jerome J  Gagliarducci et al → Gagliarducci Construction, Inc; 2006-08-01 to current/open; source msha-controller-operator-history