# Relationship history for MSHA mine 2602343

Current hierarchy: **Raymond L  Whipple, Jr. → Elite Concrete Sand & Gravel → Elite Concrete Sand & Gravel**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-18T09:31:49.615908+00:00

## Valid-time edges

- **operator_operates_mine:** American Concrete Inc → Elite Concrete Sand & Gravel; 1998-04-01 to 2002-05-22; source msha-controller-operator-history
- **controller_controls_mine:** Larry  Kuhn → Elite Concrete Sand & Gravel; 1998-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Larry  Kuhn → American Concrete Inc; 1998-04-01 to 2002-05-22; source msha-controller-operator-history
- **operator_operates_mine:** Elite Concrete Sand & Gravel → Elite Concrete Sand & Gravel; 2002-05-23 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Raymond L  Whipple, Jr. → Elite Concrete Sand & Gravel; 2002-05-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Raymond L  Whipple, Jr. → Elite Concrete Sand & Gravel; 2002-05-23 to current/open; source msha-controller-operator-history