# Relationship history for MSHA mine 0400946

Current hierarchy: **Vulcan Materials Company → CalMat Co → LEXINGTON 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

- **operator_operates_mine:** Hillsdale Rock Company → LEXINGTON QUARRY; 1950-01-01 to 1983-03-17; source msha-controller-operator-history
- **controller_controls_mine:** Henry  Matoza Jr → LEXINGTON QUARRY; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Henry  Matoza Jr → Hillsdale Rock Company; 1950-01-01 to 1983-03-17; source msha-controller-operator-history
- **operator_operates_mine:** Dastrup Paving Company → LEXINGTON QUARRY; 1983-03-18 to 1986-04-14; source msha-controller-operator-history
- **controller_controls_mine:** J K  Dastrup → LEXINGTON QUARRY; 1983-03-18 to 1986-04-14; source msha-controller-operator-history
- **controller_controls_operator:** J K  Dastrup → Dastrup Paving Company; 1983-03-18 to 1986-04-14; source msha-controller-operator-history
- **operator_operates_mine:** Dastrup Paving Company → LEXINGTON QUARRY; 1986-04-15 to 1988-07-12; source msha-controller-operator-history
- **controller_controls_mine:** Roy E  Cook → LEXINGTON QUARRY; 1986-04-15 to 1988-07-12; source msha-controller-operator-history
- **controller_controls_operator:** Roy E  Cook → Dastrup Paving Company; 1986-04-15 to 1988-07-12; source msha-controller-operator-history
- **operator_operates_mine:** Lexington Quarry Ltd → LEXINGTON QUARRY; 1988-07-13 to 1989-12-14; source msha-controller-operator-history
- **controller_controls_mine:** Murray  Hall et al → LEXINGTON QUARRY; 1988-07-13 to 1989-12-14; source msha-controller-operator-history
- **controller_controls_operator:** Murray  Hall et al → Lexington Quarry Ltd; 1988-07-13 to 1989-12-14; source msha-controller-operator-history
- **operator_operates_mine:** West Coast Aggregates, Inc → LEXINGTON QUARRY; 1989-12-15 to 2014-07-29; source msha-controller-operator-history
- **controller_controls_mine:** Eucon Corporation → LEXINGTON QUARRY; 1989-12-15 to 2008-10-05; source msha-controller-operator-history
- **controller_controls_operator:** Eucon Corporation → West Coast Aggregates, Inc; 1989-12-15 to 2008-10-05; source msha-controller-operator-history
- **controller_controls_mine:** Legacy Vulcan Corp (Form:Vulcan Materials Co) → LEXINGTON QUARRY; 1999-01-06 to 2007-11-15; source msha-controller-operator-history
- **controller_controls_mine:** Vulcan Materials Company → LEXINGTON QUARRY; 2007-11-16 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Lafarge North America Inc. et al → LEXINGTON QUARRY; 2008-10-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lafarge North America Inc. et al → West Coast Aggregates, Inc; 2008-10-06 to 2014-07-29; source msha-controller-operator-history
- **controller_controls_operator:** Richard O DeAtley et al → West Coast Aggregates, Inc; 2008-10-06 to 2014-07-29; source msha-controller-operator-history
- **controller_controls_operator:** Neal  DeAtley et al → West Coast Aggregates, Inc; 2008-10-06 to 2014-07-29; source msha-controller-operator-history
- **operator_operates_mine:** CalMat Co → LEXINGTON QUARRY; 2014-07-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Vulcan Materials Company → CalMat Co; 2014-07-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Legacy Vulcan Corp (Form:Vulcan Materials Co) → CalMat Co; 2014-07-30 to 2007-11-15; source msha-controller-operator-history