# Relationship history for MSHA mine 2200632

Current hierarchy: **James H  Williams Sr → Southwest Paving Inc → Jackson Plant**

- 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

- **controller_controls_mine:** James H  Williams Sr → Jackson Plant; 1990-04-02 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Southwest Paving Inc → Jackson Plant; 1991-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James H  Williams Sr → Southwest Paving Inc; 1991-05-01 to current/open; source msha-controller-operator-history