# Relationship history for MSHA mine 4102977

Current hierarchy: **Vulcan Materials Company → Vulcan Construction Materials, LLC → Cox Bend**

- 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) → Cox Bend; 1950-01-01 to 2007-11-15; source msha-controller-operator-history
- **operator_operates_mine:** Rainbow Aggregate Company Inc → Cox Bend; 1980-01-01 to 1988-05-01; source msha-controller-operator-history
- **controller_controls_mine:** Alton B  Hamm → Cox Bend; 1980-01-01 to 1988-05-01; source msha-controller-operator-history
- **controller_controls_operator:** Alton B  Hamm → Rainbow Aggregate Company Inc; 1980-01-01 to 1988-05-01; source msha-controller-operator-history
- **operator_operates_mine:** Ingram Enterprises Lp → Cox Bend; 1988-05-02 to 2008-02-29; source msha-controller-operator-history
- **controller_controls_mine:** Atlas Concrete Inc → Cox Bend; 1988-05-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Atlas Concrete Inc → Ingram Enterprises Lp; 1988-05-02 to 2008-02-29; source msha-controller-operator-history
- **controller_controls_mine:** Vulcan Materials Company → Cox Bend; 2007-11-16 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Ingram Concrete LLC → Cox Bend; 2008-03-01 to 2021-10-31; source msha-controller-operator-history
- **controller_controls_mine:** US Concrete → Cox Bend; 2008-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** US Concrete → Ingram Concrete LLC; 2008-03-01 to 2021-10-31; source msha-controller-operator-history
- **operator_operates_mine:** Vulcan Construction Materials, LLC → Cox Bend; 2021-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Vulcan Materials Company → Vulcan Construction Materials, LLC; 2021-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Legacy Vulcan Corp (Form:Vulcan Materials Co) → Vulcan Construction Materials, LLC; 2021-11-01 to 2007-11-15; source msha-controller-operator-history