# Relationship history for MSHA mine 3003762

Current hierarchy: **Quentin  Call → A. D. Call & Sons Excavating & Trucking, Inc. → Dills Pit**

- 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

- **operator_operates_mine:** A. D. Call & Sons Excavating & Trucking, Inc. → Dills Pit; 2010-05-25 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Quentin  Call → Dills Pit; 2010-05-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Quentin  Call → A. D. Call & Sons Excavating & Trucking, Inc.; 2010-05-25 to current/open; source msha-controller-operator-history