# Relationship history for MSHA mine 2003017

Current hierarchy: **Jed D  Wuebben → Wuebben Sand & Gravel Inc → WSG Wash Plant**

- 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:** Pebbles Inc → WSG Wash Plant; 1997-06-01 to 2022-10-31; source msha-controller-operator-history
- **controller_controls_mine:** Paul  Tomasi → WSG Wash Plant; 1997-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Paul  Tomasi → Pebbles Inc; 1997-06-01 to 2022-10-31; source msha-controller-operator-history
- **operator_operates_mine:** Wuebben Sand & Gravel Inc → WSG Wash Plant; 2022-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Jed D  Wuebben → WSG Wash Plant; 2022-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jed D  Wuebben → Wuebben Sand & Gravel Inc; 2022-11-01 to current/open; source msha-controller-operator-history