# Relationship history for MSHA mine 0900593

Current hierarchy: **Vulcan Materials Company → Vulcan Construction Materials, LLC → LITHONIA 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:** Legacy Vulcan Corp (Form:Vulcan Materials Co) → LITHONIA QUARRY; 1950-01-01 to 2007-11-15; source msha-controller-operator-history
- **operator_operates_mine:** Gifford-Hill & Company → LITHONIA QUARRY; 1950-01-01 to 1978-07-31; source msha-controller-operator-history
- **controller_controls_mine:** Hanson PLC → LITHONIA QUARRY; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Hanson PLC → Gifford-Hill & Company; 1950-01-01 to 1978-07-31; source msha-controller-operator-history
- **controller_controls_mine:** Mc Dowell Enterprises → LITHONIA QUARRY; 1950-01-01 to 1985-12-01; source msha-controller-operator-history
- **operator_operates_mine:** Mc Dowell Materials Corp → LITHONIA QUARRY; 1978-08-01 to 1983-06-26; source msha-controller-operator-history
- **controller_controls_operator:** Mc Dowell Enterprises → Mc Dowell Materials Corp; 1978-08-01 to 1983-06-26; source msha-controller-operator-history
- **operator_operates_mine:** Jasper Construction Company → LITHONIA QUARRY; 1983-06-27 to 1986-09-14; source msha-controller-operator-history
- **controller_controls_mine:** S J Groves & Sons Company → LITHONIA QUARRY; 1983-06-27 to 1986-09-14; source msha-controller-operator-history
- **controller_controls_operator:** S J Groves & Sons Company → Jasper Construction Company; 1983-06-27 to 1986-09-14; source msha-controller-operator-history
- **operator_operates_mine:** Vulcan Construction Materials, LLC → LITHONIA QUARRY; 1986-09-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Legacy Vulcan Corp (Form:Vulcan Materials Co) → Vulcan Construction Materials, LLC; 1986-09-15 to 2007-11-15; source msha-controller-operator-history
- **controller_controls_mine:** Vulcan Materials Company → LITHONIA QUARRY; 2007-11-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Vulcan Materials Company → Vulcan Construction Materials, LLC; 2007-11-16 to current/open; source msha-controller-operator-history