# Relationship history for MSHA mine 4105674

Current hierarchy: **Jacob Neufeld Knelsen; Randy Martens Knelsen → Desert Custom Crushing LLC → Wellman 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:** Desert Custom Crushing LLC → Wellman Pit; 2023-03-15 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Randy Martens Knelsen et al → Wellman Pit; 2023-03-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Randy Martens Knelsen et al → Desert Custom Crushing LLC; 2023-03-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jacob Neufeld Knelsen et al → Desert Custom Crushing LLC; 2023-03-15 to current/open; source msha-controller-operator-history