# Relationship history for MSHA mine 3609059

Current hierarchy: **David B  Kuperavage → Kuperavage Ent Inc/Tuscarora Coal Co → Kuperavage Ent Inc/TA Tuscarora Coal**

- 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

- **controller_controls_mine:** Bernard J  Kuperavage Jr et al → Kuperavage Ent Inc/TA Tuscarora Coal; 1982-10-30 to 2009-05-25; source msha-controller-operator-history
- **operator_operates_mine:** Kuperavage Ent Inc/Tuscarora Coal Co → Kuperavage Ent Inc/TA Tuscarora Coal; 2002-01-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bernard J  Kuperavage Jr et al → Kuperavage Ent Inc/Tuscarora Coal Co; 2002-01-11 to 2009-05-25; source msha-controller-operator-history
- **controller_controls_mine:** David B  Kuperavage → Kuperavage Ent Inc/TA Tuscarora Coal; 2009-05-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** David B  Kuperavage → Kuperavage Ent Inc/Tuscarora Coal Co; 2009-05-26 to current/open; source msha-controller-operator-history