# Relationship history for MSHA mine 4400038

Current hierarchy: **Frazier Quarry Inc → The Frazier Quarry, Inc. → Elkton Plant**

- 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) → Elkton Plant; 1950-01-01 to 2007-11-15; source msha-controller-operator-history
- **controller_controls_mine:** Charles S  Luck IV  et al → Elkton Plant; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Frazier Quarry Inc → Elkton Plant; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Elkton Limestone & Paving Inc → Elkton Plant; 1950-01-01 to 1982-10-05; source msha-controller-operator-history
- **controller_controls_mine:** Richard H  Shirley → Elkton Plant; 1950-01-01 to 1982-10-05; source msha-controller-operator-history
- **controller_controls_operator:** Richard H  Shirley → Elkton Limestone & Paving Inc; 1950-01-01 to 1982-10-05; source msha-controller-operator-history
- **operator_operates_mine:** Luck Stone Corp-Elkton → Elkton Plant; 1982-10-06 to 2008-03-27; source msha-controller-operator-history
- **controller_controls_operator:** Charles S  Luck IV  et al → Luck Stone Corp-Elkton; 1982-10-06 to 2008-03-27; source msha-controller-operator-history
- **controller_controls_mine:** Vulcan Materials Company → Elkton Plant; 2007-11-16 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** TCS Materials Inc → Elkton Plant; 2008-03-28 to 2012-01-25; source msha-controller-operator-history
- **controller_controls_mine:** Vulcan Materials Company → Elkton Plant; 2008-03-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Vulcan Materials Company → TCS Materials Inc; 2008-03-28 to 2012-01-25; source msha-controller-operator-history
- **operator_operates_mine:** Vulcan Construction Materials, L.P. → Elkton Plant; 2012-01-26 to 2012-12-14; source msha-controller-operator-history
- **controller_controls_operator:** Vulcan Materials Company → Vulcan Construction Materials, L.P.; 2012-01-26 to 2012-12-14; source msha-controller-operator-history
- **controller_controls_operator:** Legacy Vulcan Corp (Form:Vulcan Materials Co) → Vulcan Construction Materials, L.P.; 2012-01-26 to 2007-11-15; source msha-controller-operator-history
- **operator_operates_mine:** The Frazier Quarry, Inc. → Elkton Plant; 2012-12-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Frazier Quarry Inc → The Frazier Quarry, Inc.; 2012-12-15 to current/open; source msha-controller-operator-history