# Relationship history for MSHA mine 0102743

Current hierarchy: **Vulcan Materials Company → Vulcan Materials Asphalt and Construction, LLC → Summit 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **controller_controls_mine:** Frank D Reed Jr → Summit Quarry; 1980-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Madison Materials → Summit Quarry; 1987-11-01 to 2018-01-04; source msha-controller-operator-history
- **controller_controls_operator:** Frank D Reed Jr → Madison Materials; 1987-11-01 to 2018-01-04; source msha-controller-operator-history
- **operator_operates_mine:** Whitaker Contracting Corp. → Summit Quarry; 2018-01-05 to 2024-04-28; source msha-controller-operator-history
- **controller_controls_mine:** Frank D Reed Jr → Summit Quarry; 2018-01-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Frank D Reed Jr → Whitaker Contracting Corp.; 2018-01-05 to 2024-04-28; source msha-controller-operator-history
- **controller_controls_mine:** Vulcan Materials Company → Summit Quarry; 2021-07-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Vulcan Materials Asphalt and Construction, LLC → Summit Quarry; 2024-04-29 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Vulcan Materials Company → Vulcan Materials Asphalt and Construction, LLC; 2024-04-29 to current/open; source msha-controller-operator-history