# Relationship history for MSHA mine 3303794

Current hierarchy: **Nardulli James A → Belle Vernon Trucking Company Inc → I F A D No 1**

- 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:** Belle Vernon Trucking Company Inc → I F A D No 1; 1979-12-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Nardulli James A → I F A D No 1; 1979-12-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Nardulli James A → Belle Vernon Trucking Company Inc; 1979-12-01 to current/open; source msha-controller-operator-history