# Relationship history for MSHA mine 4103534

Current hierarchy: **Vulcan Materials Company → Vulcan Constr. Materials, L.P. → Y-100 PORTABLE**

- 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:** Legacy Vulcan Corp (Form:Vulcan Materials Co) → Y-100 PORTABLE; 1950-01-01 to 2007-11-15; source msha-controller-operator-history
- **controller_controls_mine:** Wayne  Yates → Y-100 PORTABLE; 1983-11-01 to 1999-12-30; source msha-controller-operator-history
- **operator_operates_mine:** Garves W Yates & Sons Inc → Y-100 PORTABLE; 1988-08-01 to 1999-12-30; source msha-controller-operator-history
- **controller_controls_operator:** Wayne  Yates → Garves W Yates & Sons Inc; 1988-08-01 to 1999-12-30; source msha-controller-operator-history
- **operator_operates_mine:** Vulcan Constr. Materials, L.P. → Y-100 PORTABLE; 1999-12-31 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Legacy Vulcan Corp (Form:Vulcan Materials Co) → Vulcan Constr. Materials, L.P.; 1999-12-31 to 2007-11-15; source msha-controller-operator-history
- **controller_controls_mine:** Vulcan Materials Company → Y-100 PORTABLE; 2007-11-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Vulcan Materials Company → Vulcan Constr. Materials, L.P.; 2007-11-16 to current/open; source msha-controller-operator-history