# Relationship history for MSHA mine 0505026

Current hierarchy: **Vulcan Materials Company → Vulcan Construction Materials, LLC → Lamar Sand & Gravel**

- 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) → Lamar Sand & Gravel; 1950-01-01 to 2007-11-15; source msha-controller-operator-history
- **controller_controls_mine:** James C  Marvel Jr → Lamar Sand & Gravel; 1996-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Vulcan Materials Company → Lamar Sand & Gravel; 2007-11-16 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Ezra Eldon Lee → Lamar Sand & Gravel; 2014-01-13 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Crossfire Aggregate Services LLC → Lamar Sand & Gravel; 2014-03-17 to 2016-07-28; source msha-controller-operator-history
- **controller_controls_operator:** Ezra Eldon Lee → Crossfire Aggregate Services LLC; 2014-03-17 to 2016-07-28; source msha-controller-operator-history
- **operator_operates_mine:** Prowers Aggregate Operators, LLC → Lamar Sand & Gravel; 2016-07-29 to 2021-11-17; source msha-controller-operator-history
- **controller_controls_mine:** Prowers Holding Company, LLC → Lamar Sand & Gravel; 2016-07-29 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Prowers Holding Company, LLC → Prowers Aggregate Operators, LLC; 2016-07-29 to 2021-11-17; source msha-controller-operator-history
- **operator_operates_mine:** Brannan Sand & Gravel Company → Lamar Sand & Gravel; 2021-11-18 to 2026-06-05; source msha-controller-operator-history
- **controller_controls_operator:** James C  Marvel Jr → Brannan Sand & Gravel Company; 2021-11-18 to 2026-06-05; source msha-controller-operator-history
- **operator_operates_mine:** Vulcan Construction Materials, LLC → Lamar Sand & Gravel; 2026-06-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Vulcan Materials Company → Vulcan Construction Materials, LLC; 2026-06-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Legacy Vulcan Corp (Form:Vulcan Materials Co) → Vulcan Construction Materials, LLC; 2026-06-06 to 2007-11-15; source msha-controller-operator-history