# Relationship history for MSHA mine 4202715

Current hierarchy: **Patricia  Gilbert; Keith  Gilbert → SoNev Construction → Crusher 2**

- 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

- **operator_operates_mine:** SoNev Construction → Crusher 2; 2020-07-13 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Keith  Gilbert et al → Crusher 2; 2020-07-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Keith  Gilbert et al → SoNev Construction; 2020-07-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Patricia  Gilbert et al → SoNev Construction; 2020-07-13 to current/open; source msha-controller-operator-history