# Relationship history for MSHA mine 3003734

Current hierarchy: **John M  Tatko Jr → Sheldon Slate Prod. Co, Inc. → Sheldon Slate Prod Co Inc. Hampton Quarry**

- 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:** John M  Tatko Jr → Sheldon Slate Prod Co Inc. Hampton Quarr; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Sheldon Slate Prod. Co, Inc. → Sheldon Slate Prod Co Inc. Hampton Quarr; 2009-11-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** John M  Tatko Jr → Sheldon Slate Prod. Co, Inc.; 2009-11-23 to current/open; source msha-controller-operator-history