# Relationship history for MSHA mine 2501260

Current hierarchy: **Jeffery  Yost; Shelley  Yost → B-Y Excavating Inc → Splitt Quarry**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** B-Y Excavating Inc → Splitt Quarry; 2009-08-11 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Neal  Everist → Splitt Quarry; 2009-08-11 to 2014-11-14; source msha-controller-operator-history
- **controller_controls_operator:** Neal  Everist → B-Y Excavating Inc; 2009-08-11 to 2014-11-14; source msha-controller-operator-history
- **controller_controls_mine:** Jeffery  Yost et al → Splitt Quarry; 2014-11-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jeffery  Yost et al → B-Y Excavating Inc; 2014-11-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Shelley  Yost et al → B-Y Excavating Inc; 2014-11-15 to current/open; source msha-controller-operator-history