# Relationship history for MSHA mine 0901045

Current hierarchy: **Vulcan Materials Company → Vulcan Construction Materials, LLC → ROCKMART QUARRY**

- 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) → ROCKMART QUARRY; 1950-01-01 to 2007-11-15; source msha-controller-operator-history
- **controller_controls_mine:** Robert E  Matthews → ROCKMART QUARRY; 1979-03-01 to 1998-05-01; source msha-controller-operator-history
- **operator_operates_mine:** Rockmart Limestone Inc → ROCKMART QUARRY; 1989-10-01 to 1990-07-26; source msha-controller-operator-history
- **controller_controls_mine:** George  Lambert et al → ROCKMART QUARRY; 1989-10-01 to 1990-07-26; source msha-controller-operator-history
- **controller_controls_operator:** George  Lambert et al → Rockmart Limestone Inc; 1989-10-01 to 1990-07-26; source msha-controller-operator-history
- **operator_operates_mine:** C W Matthews Quarries Inc → ROCKMART QUARRY; 1990-07-27 to 1998-05-01; source msha-controller-operator-history
- **controller_controls_operator:** Robert E  Matthews → C W Matthews Quarries Inc; 1990-07-27 to 1998-05-01; source msha-controller-operator-history
- **operator_operates_mine:** Vulcan Constr. Materials, L.P. → ROCKMART QUARRY; 1998-05-02 to 2002-07-31; source msha-controller-operator-history
- **controller_controls_operator:** Legacy Vulcan Corp (Form:Vulcan Materials Co) → Vulcan Constr. Materials, L.P.; 1998-05-02 to 2002-07-31; source msha-controller-operator-history
- **operator_operates_mine:** Vulcan Materials Company → ROCKMART QUARRY; 2002-08-01 to 2005-04-30; source msha-controller-operator-history
- **controller_controls_operator:** Legacy Vulcan Corp (Form:Vulcan Materials Co) → Vulcan Materials Company; 2002-08-01 to 2005-04-30; source msha-controller-operator-history
- **operator_operates_mine:** Vulcan Construction Materials, LLC → ROCKMART QUARRY; 2005-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Legacy Vulcan Corp (Form:Vulcan Materials Co) → Vulcan Construction Materials, LLC; 2005-05-01 to 2007-11-15; source msha-controller-operator-history
- **controller_controls_mine:** Vulcan Materials Company → ROCKMART QUARRY; 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 2002-07-31; source msha-controller-operator-history
- **controller_controls_operator:** Vulcan Materials Company → Vulcan Materials Company; 2007-11-16 to 2005-04-30; source msha-controller-operator-history
- **controller_controls_operator:** Vulcan Materials Company → Vulcan Construction Materials, LLC; 2007-11-16 to current/open; source msha-controller-operator-history