# Relationship history for MSHA mine 3101094

Current hierarchy: **Vulcan Materials Company → Vulcan Construction Materials, LLC → Lenoir**

- 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) → Lenoir; 1950-01-01 to 2007-11-15; source msha-controller-operator-history
- **operator_operates_mine:** State Contracting & Materials Division → Lenoir; 1950-01-01 to 1978-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Medusa Corp → Lenoir; 1950-01-01 to 1979-01-31; source msha-controller-operator-history
- **controller_controls_operator:** Medusa Corp → State Contracting & Materials Division; 1950-01-01 to 1978-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Medusa Corp → Lenoir; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Crane Company → Lenoir; 1978-12-13 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Medusa Aggregates Company → Lenoir; 1979-01-01 to 1988-10-06; source msha-controller-operator-history
- **controller_controls_operator:** Crane Company → Medusa Aggregates Company; 1979-01-01 to 1988-10-06; source msha-controller-operator-history
- **operator_operates_mine:** Medusa Aggregates Company → Lenoir; 1988-10-07 to 1998-06-29; source msha-controller-operator-history
- **controller_controls_operator:** Medusa Corp → Medusa Aggregates Company; 1988-10-07 to 1998-06-29; source msha-controller-operator-history
- **operator_operates_mine:** Medusa Aggregates Company → Lenoir; 1998-06-30 to 1999-01-28; source msha-controller-operator-history
- **controller_controls_mine:** Southdown Inc → Lenoir; 1998-06-30 to 1999-01-28; source msha-controller-operator-history
- **controller_controls_operator:** Southdown Inc → Medusa Aggregates Company; 1998-06-30 to 1999-01-28; source msha-controller-operator-history
- **operator_operates_mine:** Vulcan Construction Materials, LLC → Lenoir; 1999-01-29 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Legacy Vulcan Corp (Form:Vulcan Materials Co) → Vulcan Construction Materials, LLC; 1999-01-29 to 2007-11-15; source msha-controller-operator-history
- **controller_controls_mine:** Vulcan Materials Company → Lenoir; 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