# Relationship history for MSHA mine 3609571

Current hierarchy: **R James  Knouse Jr → Gettysburg Granite → Gettysburg 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** Gettysburg Granite → Gettysburg Granite; 2007-10-31 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Philip E  Justice → Gettysburg Granite; 2007-10-31 to 2008-05-08; source msha-controller-operator-history
- **controller_controls_operator:** Philip E  Justice → Gettysburg Granite; 2007-10-31 to 2008-05-08; source msha-controller-operator-history
- **controller_controls_mine:** R James  Knouse Jr → Gettysburg Granite; 2008-05-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** R James  Knouse Jr → Gettysburg Granite; 2008-05-09 to current/open; source msha-controller-operator-history