# Relationship history for MSHA mine 4400166

Current hierarchy: **Quikrete Holdings Inc. → Blue Ridge Stone Corp → Horsepasture Plant**

- 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:** Boxley Materials Co → Horsepasture Plant; 1950-01-01 to 2016-03-20; source msha-controller-operator-history
- **operator_operates_mine:** Wilson Quarries → Horsepasture Plant; 1950-01-01 to 1999-05-06; source msha-controller-operator-history
- **controller_controls_mine:** Wilson Robert L & A C → Horsepasture Plant; 1950-01-01 to 1999-05-06; source msha-controller-operator-history
- **controller_controls_operator:** Wilson Robert L & A C → Wilson Quarries; 1950-01-01 to 1999-05-06; source msha-controller-operator-history
- **operator_operates_mine:** Blue Ridge Stone Corp → Horsepasture Plant; 1999-05-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Boxley Materials Co → Blue Ridge Stone Corp; 1999-05-07 to 2016-03-20; source msha-controller-operator-history
- **controller_controls_mine:** Summit Materials LLC → Horsepasture Plant; 2016-03-21 to 2025-02-09; source msha-controller-operator-history
- **controller_controls_operator:** Summit Materials LLC → Blue Ridge Stone Corp; 2016-03-21 to 2025-02-09; source msha-controller-operator-history
- **controller_controls_mine:** Quikrete Holdings Inc. → Horsepasture Plant; 2025-02-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Quikrete Holdings Inc. → Blue Ridge Stone Corp; 2025-02-10 to current/open; source msha-controller-operator-history