# Relationship history for MSHA mine 1401813

Current hierarchy: **Murfin Drilling Inc → WKDC, LLC → Lakin 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:** WKDC, LLC → Lakin Pit; 2020-05-18 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Murfin Drilling Inc → Lakin Pit; 2020-05-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Murfin Drilling Inc → WKDC, LLC; 2020-05-18 to current/open; source msha-controller-operator-history