# Relationship history for MSHA mine 2902243

Current hierarchy: **Vulcan Materials Company → CalMat Co → SANTO DOMINGO PUEBLO MINE**

- 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) → SANTO DOMINGO PUEBLO MINE; 1999-01-06 to 2007-11-15; source msha-controller-operator-history
- **controller_controls_mine:** Lafarge S A → SANTO DOMINGO PUEBLO MINE; 2002-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** CalMat Co → SANTO DOMINGO PUEBLO MINE; 2002-11-04 to 2011-10-02; source msha-controller-operator-history
- **controller_controls_operator:** Legacy Vulcan Corp (Form:Vulcan Materials Co) → CalMat Co; 2002-11-04 to 2007-11-15; source msha-controller-operator-history
- **controller_controls_mine:** Vulcan Materials Company → SANTO DOMINGO PUEBLO MINE; 2007-11-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Vulcan Materials Company → CalMat Co; 2007-11-16 to 2011-10-02; source msha-controller-operator-history
- **operator_operates_mine:** Lafarge Southwest Inc → SANTO DOMINGO PUEBLO MINE; 2011-10-03 to 2014-08-28; source msha-controller-operator-history
- **controller_controls_operator:** Lafarge S A → Lafarge Southwest Inc; 2011-10-03 to 2014-08-28; source msha-controller-operator-history
- **operator_operates_mine:** CalMat Co → SANTO DOMINGO PUEBLO MINE; 2014-08-29 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Vulcan Materials Company → CalMat Co; 2014-08-29 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Legacy Vulcan Corp (Form:Vulcan Materials Co) → CalMat Co; 2014-08-29 to 2007-11-15; source msha-controller-operator-history