# Relationship history for MSHA mine 2103937

Current hierarchy: **William D  Smude → Smude Construction LLC → Washplant**

- 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:** Smude Construction LLC → Washplant; 2018-09-12 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** William D  Smude → Washplant; 2018-09-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** William D  Smude → Smude Construction LLC; 2018-09-12 to current/open; source msha-controller-operator-history