# Relationship history for MSHA mine 0301900

Current hierarchy: **Scurlock Industries of Jonesboro Inc → Scurlock Aggregates, Inc. → Bradford Mine**

- 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:** Scurlock Aggregates, Inc. → Bradford Mine; 2004-11-03 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Scurlock Industries of Jonesboro Inc → Bradford Mine; 2004-11-03 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Scurlock Industries of Jonesboro Inc → Scurlock Aggregates, Inc.; 2004-11-03 to current/open; source msha-controller-operator-history