# Relationship history for MSHA mine 0301480

Current hierarchy: **Colas S A → Delta Asphalt Of Arkansas Inc → Delta Asphalt Clay County 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Delta Asphalt Inc → Delta Asphalt Clay County Pit; 1979-11-01 to 2004-08-12; source msha-controller-operator-history
- **operator_operates_mine:** Delta Asphalt Of Arkansas Inc → Delta Asphalt Clay County Pit; 1980-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Delta Asphalt Inc → Delta Asphalt Of Arkansas Inc; 1980-02-01 to 2004-08-12; source msha-controller-operator-history
- **controller_controls_mine:** Colas S A → Delta Asphalt Clay County Pit; 2004-08-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Colas S A → Delta Asphalt Of Arkansas Inc; 2004-08-13 to current/open; source msha-controller-operator-history