# Relationship history for MSHA mine 4703702

Current hierarchy: **Benjamin E  Gersek; Sheila M  Gersek → Bay Area Crushing, LLC. → Plant #1**

- 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:** Bay Area Crushing, LLC → Plant #1; 2013-11-05 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Benjamin E  Gersek et al → Plant #1; 2013-11-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Benjamin E  Gersek et al → Bay Area Crushing, LLC; 2013-11-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Sheila M  Gersek et al → Bay Area Crushing, LLC; 2013-11-05 to current/open; source msha-controller-operator-history