# Relationship history for MSHA mine 0202940

Current hierarchy: **Larry  Farnsworth; Suzanna  Lines → Universal Materials Inc → Universal Materials Skousen Pit**

- 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

- **operator_operates_mine:** Universal Materials Inc → Universal Materials Skousen Pit; 2001-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Larry  Farnsworth et al → Universal Materials Skousen Pit; 2001-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Larry  Farnsworth et al → Universal Materials Inc; 2001-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Suzanna  Lines et al → Universal Materials Inc; 2001-04-01 to current/open; source msha-controller-operator-history