# Relationship history for MSHA mine 3604864

Current hierarchy: **Craig A  Dally → American Bangor Slate & Stone → AMERICAN BANGOR SLATE & STONE**

- 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

- **operator_operates_mine:** John T Dally → AMERICAN BANGOR SLATE & STONE; 1950-01-01 to 1992-02-10; source msha-controller-operator-history
- **controller_controls_mine:** Dally Slate Company → AMERICAN BANGOR SLATE & STONE; 1950-01-01 to 1992-02-10; source msha-controller-operator-history
- **controller_controls_operator:** Dally Slate Company → John T Dally; 1950-01-01 to 1992-02-10; source msha-controller-operator-history
- **operator_operates_mine:** American Bangor Slate & Stone → AMERICAN BANGOR SLATE & STONE; 1992-02-11 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Craig A  Dally → AMERICAN BANGOR SLATE & STONE; 1992-02-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Craig A  Dally → American Bangor Slate & Stone; 1992-02-11 to current/open; source msha-controller-operator-history