# Relationship history for MSHA mine 1800710

Current hierarchy: **Vulcan Materials Company → Vulcan Construction Materials, LP → Goose Bay Aggregates**

- 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) → Goose Bay Aggregates; 1950-01-01 to 2007-11-15; source msha-controller-operator-history
- **controller_controls_mine:** Florida Rock Industries Inc → Goose Bay Aggregates; 1950-01-01 to 2007-11-15; source msha-controller-operator-history
- **operator_operates_mine:** Goose Bay Aggregates Inc → Goose Bay Aggregates; 1985-08-01 to 1997-10-03; source msha-controller-operator-history
- **controller_controls_mine:** Morauer & Hartzell Inc → Goose Bay Aggregates; 1985-08-01 to 1997-10-03; source msha-controller-operator-history
- **controller_controls_operator:** Morauer & Hartzell Inc → Goose Bay Aggregates Inc; 1985-08-01 to 1997-10-03; source msha-controller-operator-history
- **operator_operates_mine:** Florida Rock Industries Inc → Goose Bay Aggregates; 1997-10-04 to 2007-11-15; source msha-controller-operator-history
- **controller_controls_operator:** Florida Rock Industries Inc → Florida Rock Industries Inc; 1997-10-04 to 2007-11-15; source msha-controller-operator-history
- **controller_controls_mine:** Vulcan Materials Company → Goose Bay Aggregates; 2007-11-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Vulcan Materials Company → Florida Rock Industries Inc; 2007-11-16 to 2007-11-15; source msha-controller-operator-history
- **operator_operates_mine:** Vulcan Construction Materials, LP → Goose Bay Aggregates; 2007-11-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Vulcan Materials Company → Vulcan Construction Materials, LP; 2007-11-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Legacy Vulcan Corp (Form:Vulcan Materials Co) → Vulcan Construction Materials, LP; 2007-11-16 to 2007-11-15; source msha-controller-operator-history