# Relationship history for MSHA mine 3002812

Current hierarchy: **Robert  Scheinman → Woodburne Materials → Woodbourne Materials Woodburne Plt Rt42**

- 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:** Nick F  Badami → Woodbourne Materials Woodburne Plt Rt42; 1983-04-21 to 1996-05-31; source msha-controller-operator-history
- **operator_operates_mine:** Maybrook Materials Inc → Woodbourne Materials Woodburne Plt Rt42; 1987-09-01 to 1992-08-03; source msha-controller-operator-history
- **controller_controls_operator:** Nick F  Badami → Maybrook Materials Inc; 1987-09-01 to 1992-08-03; source msha-controller-operator-history
- **operator_operates_mine:** Woodburne Materials → Woodbourne Materials Woodburne Plt Rt42; 1992-08-04 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Robert  Scheinman → Woodbourne Materials Woodburne Plt Rt42; 1992-08-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Robert  Scheinman → Woodburne Materials; 1992-08-04 to current/open; source msha-controller-operator-history