# Relationship history for MSHA mine 4104891

Current hierarchy: **Ruben  Salinas Sr → Ellinger Sand & Gravel → Ellinger Sand & Gravel**

- 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:** Ellinger Materials → Ellinger Sand & Gravel; 2011-07-06 to 2016-02-04; source msha-controller-operator-history
- **controller_controls_mine:** Ruben  Salinas Jr → Ellinger Sand & Gravel; 2011-07-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ruben  Salinas Jr → Ellinger Materials; 2011-07-06 to 2016-02-04; source msha-controller-operator-history
- **operator_operates_mine:** Ellinger Sand & Gravel → Ellinger Sand & Gravel; 2016-02-05 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Ruben  Salinas Jr → Ellinger Sand & Gravel; 2016-02-05 to 2024-05-29; source msha-controller-operator-history
- **controller_controls_operator:** Ruben  Salinas Jr → Ellinger Sand & Gravel; 2016-02-05 to 2024-05-29; source msha-controller-operator-history
- **controller_controls_mine:** Ruben  Salinas Sr → Ellinger Sand & Gravel; 2024-05-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ruben  Salinas Sr → Ellinger Sand & Gravel; 2024-05-30 to current/open; source msha-controller-operator-history