# Relationship history for MSHA mine 4002233

Current hierarchy: **Vulcan Materials Company → Vulcan Constr. Materials, L.P. → SOUTH PITTSBURG PLANT**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Legacy Vulcan Corp (Form:Vulcan Materials Co) → SOUTH PITTSBURG PLANT; 1950-01-01 to 2007-11-15; source msha-controller-operator-history
- **operator_operates_mine:** Marion Sand & Gravel Company Inc → SOUTH PITTSBURG PLANT; 1950-01-01 to 1992-02-29; source msha-controller-operator-history
- **controller_controls_mine:** V P  Serodino → SOUTH PITTSBURG PLANT; 1950-01-01 to 1992-02-29; source msha-controller-operator-history
- **controller_controls_operator:** V P  Serodino → Marion Sand & Gravel Company Inc; 1950-01-01 to 1992-02-29; source msha-controller-operator-history
- **operator_operates_mine:** Southern Sand Inc → SOUTH PITTSBURG PLANT; 1992-03-01 to 1997-03-11; source msha-controller-operator-history
- **controller_controls_mine:** Bobby  Fryar → SOUTH PITTSBURG PLANT; 1992-03-01 to 1997-03-11; source msha-controller-operator-history
- **controller_controls_operator:** Bobby  Fryar → Southern Sand Inc; 1992-03-01 to 1997-03-11; source msha-controller-operator-history
- **controller_controls_mine:** U S Aggregate Inc → SOUTH PITTSBURG PLANT; 1996-11-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Bradley Stone & Sand → SOUTH PITTSBURG PLANT; 1997-03-12 to 2002-05-29; source msha-controller-operator-history
- **controller_controls_operator:** U S Aggregate Inc → Bradley Stone & Sand; 1997-03-12 to 2002-05-29; source msha-controller-operator-history
- **operator_operates_mine:** Vulcan Constr. Materials, L.P. → SOUTH PITTSBURG PLANT; 2002-05-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Legacy Vulcan Corp (Form:Vulcan Materials Co) → Vulcan Constr. Materials, L.P.; 2002-05-30 to 2007-11-15; source msha-controller-operator-history
- **controller_controls_mine:** Vulcan Materials Company → SOUTH PITTSBURG PLANT; 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