# Relationship history for MSHA mine 0201937

Current hierarchy: **Harris Jerry → Harris Granite Company → Harris Granite**

- 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:** Harris Jerry → Harris Granite; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Sand & Stone Town Of Arizona Inc → Harris Granite; 1979-06-01 to 1981-06-07; source msha-controller-operator-history
- **controller_controls_mine:** Wells Dick → Harris Granite; 1979-06-01 to 1981-06-07; source msha-controller-operator-history
- **controller_controls_operator:** Wells Dick → Sand & Stone Town Of Arizona Inc; 1979-06-01 to 1981-06-07; source msha-controller-operator-history
- **operator_operates_mine:** Harris Granite Company → Harris Granite; 1981-06-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Harris Jerry → Harris Granite Company; 1981-06-08 to current/open; source msha-controller-operator-history