# Relationship history for MSHA mine 4403592

Current hierarchy: **Daniel L  Thrasher III → Thrasher Sand Company → Daniel L Thrasher Jr**

- 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:** Tidewater Sand Inc → Daniel L Thrasher Jr; 1950-01-01 to 1993-05-25; source msha-controller-operator-history
- **controller_controls_mine:** James S  Jackson → Daniel L Thrasher Jr; 1950-01-01 to 1993-05-25; source msha-controller-operator-history
- **controller_controls_operator:** James S  Jackson → Tidewater Sand Inc; 1950-01-01 to 1993-05-25; source msha-controller-operator-history
- **operator_operates_mine:** Thrasher Sand Company → Daniel L Thrasher Jr; 1993-05-26 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Daniel L  Thrasher III → Daniel L Thrasher Jr; 1993-05-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Daniel L  Thrasher III → Thrasher Sand Company; 1993-05-26 to current/open; source msha-controller-operator-history