# Relationship history for MSHA mine 5001939

Current hierarchy: **Timothy A  Eddy → S&S General Contractors and Equipment Rental Inc → S&S Quarry Crusher**

- 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

- **controller_controls_mine:** John Roger  Sudnikovich → S&S Quarry Crusher; 1984-04-01 to 2008-08-17; source msha-controller-operator-history
- **controller_controls_mine:** Timothy A  Eddy → S&S Quarry Crusher; 2008-08-18 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** S&S General Contractors and Equipment Rental Inc → S&S Quarry Crusher; 2010-06-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Timothy A  Eddy → S&S General Contractors and Equipment Rental Inc; 2010-06-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** John Roger  Sudnikovich → S&S General Contractors and Equipment Rental Inc; 2010-06-18 to 2008-08-17; source msha-controller-operator-history