# Relationship history for MSHA mine 0405626

Current hierarchy: **Vulcan Materials Company → CalMat Co → Fort Cady 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Peter Kiewit Sons' Inc → Fort Cady Quarry; 1984-07-01 to 2023-09-18; source msha-controller-operator-history
- **controller_controls_mine:** Legacy Vulcan Corp (Form:Vulcan Materials Co) → Fort Cady Quarry; 1999-01-06 to 2007-11-15; source msha-controller-operator-history
- **operator_operates_mine:** Kiewit Pacific Co. → Fort Cady Quarry; 2004-12-22 to 2012-08-09; source msha-controller-operator-history
- **controller_controls_operator:** Peter Kiewit Sons' Inc → Kiewit Pacific Co.; 2004-12-22 to 2012-08-09; source msha-controller-operator-history
- **controller_controls_mine:** Vulcan Materials Company → Fort Cady Quarry; 2007-11-16 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Security Paving Company, Inc. → Fort Cady Quarry; 2012-08-10 to 2015-02-25; source msha-controller-operator-history
- **controller_controls_mine:** Albert  Mattivi → Fort Cady Quarry; 2012-08-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Albert  Mattivi → Security Paving Company, Inc.; 2012-08-10 to 2015-02-25; source msha-controller-operator-history
- **operator_operates_mine:** CalMat Co → Fort Cady Quarry; 2015-02-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Vulcan Materials Company → CalMat Co; 2015-02-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Legacy Vulcan Corp (Form:Vulcan Materials Co) → CalMat Co; 2015-02-26 to 2007-11-15; source msha-controller-operator-history
- **controller_controls_mine:** Kiewit Infrastructure Group Inc → Fort Cady Quarry; 2023-09-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kiewit Infrastructure Group Inc → Kiewit Pacific Co.; 2023-09-19 to 2012-08-09; source msha-controller-operator-history