# Relationship history for MSHA mine 2501176

Current hierarchy: **Joanie  Dudden → Dudden Gravel & Rock Products → Dudden Gravel & Rock Products**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-18T09:31:49.615908+00:00

## Valid-time edges

- **operator_operates_mine:** J Dudden Gravel → Dudden Gravel & Rock Products; 1997-10-01 to 1998-05-31; source msha-controller-operator-history
- **controller_controls_mine:** Joanie  Dudden → Dudden Gravel & Rock Products; 1997-10-01 to 1998-05-31; source msha-controller-operator-history
- **controller_controls_operator:** Joanie  Dudden → J Dudden Gravel; 1997-10-01 to 1998-05-31; source msha-controller-operator-history
- **operator_operates_mine:** C K Gravel → Dudden Gravel & Rock Products; 1998-06-01 to 2000-01-14; source msha-controller-operator-history
- **controller_controls_mine:** Charles  Saunders → Dudden Gravel & Rock Products; 1998-06-01 to 2000-01-14; source msha-controller-operator-history
- **controller_controls_operator:** Charles  Saunders → C K Gravel; 1998-06-01 to 2000-01-14; source msha-controller-operator-history
- **operator_operates_mine:** Dudden Gravel & Rock Products → Dudden Gravel & Rock Products; 2000-01-15 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Joanie  Dudden → Dudden Gravel & Rock Products; 2000-01-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Joanie  Dudden → Dudden Gravel & Rock Products; 2000-01-15 to current/open; source msha-controller-operator-history