# Relationship history for MSHA mine 0600559

Current hierarchy: **Mullen Paul → East Longmeadow Sand & Gravel Inc → Wilson-Siano Pit & Mill**

- 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:** Sam Yacovone & Sons Inc → Wilson-Siano Pit & Mill; 1950-01-01 to 1980-08-10; source msha-controller-operator-history
- **controller_controls_mine:** Yacovone Enrico → Wilson-Siano Pit & Mill; 1950-01-01 to 1980-08-10; source msha-controller-operator-history
- **controller_controls_operator:** Yacovone Enrico → Sam Yacovone & Sons Inc; 1950-01-01 to 1980-08-10; source msha-controller-operator-history
- **operator_operates_mine:** East Longmeadow Sand & Gravel Inc → Wilson-Siano Pit & Mill; 1980-08-11 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Mullen Paul → Wilson-Siano Pit & Mill; 1980-08-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mullen Paul → East Longmeadow Sand & Gravel Inc; 1980-08-11 to current/open; source msha-controller-operator-history