# Relationship history for MSHA mine 3003173

Current hierarchy: **Di Stefano Bruce W → Green Island Construction Company Inc → SCREEN II ROADRUNNER**

- 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:** Di Stefano Bruce W → SCREEN II ROADRUNNER; 1992-05-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Green Island Construction Company Inc → SCREEN II ROADRUNNER; 1996-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Di Stefano Bruce W → Green Island Construction Company Inc; 1996-09-01 to current/open; source msha-controller-operator-history