# Relationship history for MSHA mine 2401416

Current hierarchy: **Rex  Leipheimer; John  Jeffery → Jeffery Contracting → JEFFERY PORTABLE 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:** Jim Gilman Excavating Inc → JEFFERY PORTABLE CRUSHER; 1978-03-09 to 2023-01-23; source msha-controller-operator-history
- **controller_controls_mine:** James C  Gilman → JEFFERY PORTABLE CRUSHER; 1978-03-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James C  Gilman → Jim Gilman Excavating Inc; 1978-03-09 to 2023-01-23; source msha-controller-operator-history
- **operator_operates_mine:** Jeffery Contracting → JEFFERY PORTABLE CRUSHER; 2023-01-24 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Rex  Leipheimer et al → JEFFERY PORTABLE CRUSHER; 2023-01-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Rex  Leipheimer et al → Jeffery Contracting; 2023-01-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** John  Jeffery et al → Jeffery Contracting; 2023-01-24 to current/open; source msha-controller-operator-history