# Relationship history for MSHA mine 4105206

Current hierarchy: **Ingram Readymix → Ingram Readymix No. 87, L.L.C. → Proctor 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) → Proctor Quarry; 1950-01-01 to 2007-11-15; source msha-controller-operator-history
- **controller_controls_mine:** Vulcan Materials Company → Proctor Quarry; 2007-11-16 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** US Concrete → Proctor Quarry; 2008-03-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Leon River Aggregate Materials → Proctor Quarry; 2016-07-20 to 2018-08-29; source msha-controller-operator-history
- **controller_controls_mine:** Jerrel E  Bolton → Proctor Quarry; 2016-07-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jerrel E  Bolton → Leon River Aggregate Materials; 2016-07-20 to 2018-08-29; source msha-controller-operator-history
- **operator_operates_mine:** Ingram Concrete LLC → Proctor Quarry; 2018-08-30 to 2021-10-31; source msha-controller-operator-history
- **controller_controls_operator:** US Concrete → Ingram Concrete LLC; 2018-08-30 to 2021-10-31; source msha-controller-operator-history
- **operator_operates_mine:** Vulcan Construction Materials, LLC → Proctor Quarry; 2021-11-01 to 2025-02-10; source msha-controller-operator-history
- **controller_controls_operator:** Vulcan Materials Company → Vulcan Construction Materials, LLC; 2021-11-01 to 2025-02-10; 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
- **operator_operates_mine:** Ingram Readymix No. 87, L.L.C. → Proctor Quarry; 2025-02-11 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Ingram Readymix → Proctor Quarry; 2025-02-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ingram Readymix → Ingram Readymix No. 87, L.L.C.; 2025-02-11 to current/open; source msha-controller-operator-history