# Relationship history for MSHA mine 3301885

Current hierarchy: **Thomas G  Gentile → Ohio River Collieries → Negus Strip**

- 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:** Thomas G  Gentile → Negus Strip; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** N & G Construction Inc → Negus Strip; 1950-01-01 to 1984-07-10; source msha-controller-operator-history
- **controller_controls_mine:** Gentile Robert H → Negus Strip; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Gentile Robert H → N & G Construction Inc; 1950-01-01 to 1984-07-10; source msha-controller-operator-history
- **operator_operates_mine:** Ohio River Collieries → Negus Strip; 1984-07-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Thomas G  Gentile → Ohio River Collieries; 1984-07-11 to current/open; source msha-controller-operator-history