# Relationship history for MSHA mine 3304506

Current hierarchy: **William T  Gaffney; Scott T  Marucci → Marucci and Gaffney Excavating Co. → Vienna Yard**

- 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:** Marucci and Gaffney Excavating Co. → Vienna Yard; 2002-07-09 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Scott T  Marucci et al → Vienna Yard; 2002-07-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Scott T  Marucci et al → Marucci and Gaffney Excavating Co.; 2002-07-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** William T  Gaffney et al → Marucci and Gaffney Excavating Co.; 2002-07-09 to current/open; source msha-controller-operator-history