# Relationship history for MSHA mine 2301942

Current hierarchy: **Lyn  Havin → Havin Material Service Inc Virginia Mine Div. → Havin Material Service Inc VA Mines**

- 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

- **controller_controls_mine:** Lyn  Havin → Havin Material Service Inc VA Mines; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Virginia Mines Sand & Gravel → Havin Material Service Inc VA Mines; 1985-09-01 to 1997-08-04; source msha-controller-operator-history
- **controller_controls_mine:** Donna A  Pruitt → Havin Material Service Inc VA Mines; 1985-09-01 to 1997-08-04; source msha-controller-operator-history
- **controller_controls_operator:** Donna A  Pruitt → Virginia Mines Sand & Gravel; 1985-09-01 to 1997-08-04; source msha-controller-operator-history
- **operator_operates_mine:** Havin Material Service Inc Virginia Mine Div. → Havin Material Service Inc VA Mines; 1997-08-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lyn  Havin → Havin Material Service Inc Virginia Mine Div.; 1997-08-05 to current/open; source msha-controller-operator-history