# Relationship history for MSHA mine 2402724

Current hierarchy: **Rex  Leipheimer; John  Jeffery → Butana Sand and Gravel LLC → Stoltze Crusher**

- 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:** Butana Sand and Gravel LLC → Stoltze Crusher; 2018-02-23 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** John  Jeffery et al → Stoltze Crusher; 2018-02-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** John  Jeffery et al → Butana Sand and Gravel LLC; 2018-02-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Rex  Leipheimer et al → Butana Sand and Gravel LLC; 2018-02-23 to current/open; source msha-controller-operator-history