# Relationship history for MSHA mine 3102339

Current hierarchy: **Alton  Williams Jr → Prize Management DBA SandRidge Materials → Prize Management DBA SandRidge Materials**

- 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:** Sand Ridge Materials → Prize Management DBA SandRidge Materials; 2022-01-11 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Alton  Williams Jr → Prize Management DBA SandRidge Materials; 2022-01-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Alton  Williams Jr → Sand Ridge Materials; 2022-01-11 to current/open; source msha-controller-operator-history