# Relationship history for MSHA mine 1517053

Current hierarchy: **Vulcan Materials Company → Vulcan Constr. Materials, L.P. → Elizabethtown**

- 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

- **controller_controls_mine:** Legacy Vulcan Corp (Form:Vulcan Materials Co) → Elizabethtown; 1950-01-01 to 2007-11-15; source msha-controller-operator-history
- **operator_operates_mine:** Cox'S Quarry → Elizabethtown; 1991-04-01 to 1994-02-04; source msha-controller-operator-history
- **controller_controls_mine:** Greg  Cox  et al → Elizabethtown; 1991-04-01 to 1994-02-04; source msha-controller-operator-history
- **controller_controls_operator:** Greg  Cox  et al → Cox'S Quarry; 1991-04-01 to 1994-02-04; source msha-controller-operator-history
- **controller_controls_mine:** Larry T  Glass → Elizabethtown; 1992-03-16 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Hart County Stone Company → Elizabethtown; 1994-02-05 to 2003-05-20; source msha-controller-operator-history
- **controller_controls_operator:** Larry T  Glass → Hart County Stone Company; 1994-02-05 to 2003-05-20; source msha-controller-operator-history
- **operator_operates_mine:** Vulcan Constr. Materials, L.P. → Elizabethtown; 2003-05-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Legacy Vulcan Corp (Form:Vulcan Materials Co) → Vulcan Constr. Materials, L.P.; 2003-05-21 to 2007-11-15; source msha-controller-operator-history
- **controller_controls_mine:** Vulcan Materials Company → Elizabethtown; 2007-11-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Vulcan Materials Company → Vulcan Constr. Materials, L.P.; 2007-11-16 to current/open; source msha-controller-operator-history