# Relationship history for MSHA mine 4105327

Current hierarchy: **Russell  Crisp → RWC Material LLC → Oasis 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

- **controller_controls_mine:** Russell  Crisp → Oasis Pit; 2013-06-24 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** RWC Material LLC → Oasis Pit; 2018-01-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Russell  Crisp → RWC Material LLC; 2018-01-05 to current/open; source msha-controller-operator-history