# Relationship history for MSHA mine 3608716

Current hierarchy: **Ronald J  Kuperavage → Tuscarora Mines & Minerals Corp → Silver Creek Mtn Mine Operation**

- 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

- **controller_controls_mine:** Leonard  Zukes Sr → Silver Creek Mtn Mine Operation; 1984-02-01 to 2006-08-31; source msha-controller-operator-history
- **controller_controls_mine:** Waldermar T  Fetterolf Jr et al → Silver Creek Mtn Mine Operation; 1998-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Triple T Mining Company L P → Silver Creek Mtn Mine Operation; 1998-02-01 to 2009-06-17; source msha-controller-operator-history
- **controller_controls_operator:** Waldermar T  Fetterolf Jr et al → Triple T Mining Company L P; 1998-02-01 to 2009-06-17; source msha-controller-operator-history
- **controller_controls_mine:** Ronald J  Kuperavage → Silver Creek Mtn Mine Operation; 2006-09-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Tuscarora Mines & Minerals Corp → Silver Creek Mtn Mine Operation; 2009-06-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ronald J  Kuperavage → Tuscarora Mines & Minerals Corp; 2009-06-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Leonard  Zukes Sr → Tuscarora Mines & Minerals Corp; 2009-06-18 to 2006-08-31; source msha-controller-operator-history