# Relationship history for MSHA mine 2402323

Current hierarchy: **Chari L  Wipplinger; Douglas W  Wipplinger → Robin's Contracting, Inc. → Robin's Contracting, Inc. / Tompkins 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Robin's Contracting, Inc. → Robin's Contracting, Inc. / Tompkins Pit; 2003-04-09 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Douglas W  Wipplinger → Robin's Contracting, Inc. / Tompkins Pit; 2003-04-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Douglas W  Wipplinger → Robin's Contracting, Inc.; 2003-04-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Chari L  Wipplinger → Robin's Contracting, Inc.; 2003-04-09 to current/open; source msha-controller-operator-history