# Relationship history for MSHA mine 1000338

Current hierarchy: **James E  McGill → Magic Valley Sand & Gravel Inc → Sand And Gravel Plant**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-18T09:31:49.615908+00:00

## Valid-time edges

- **operator_operates_mine:** Magic Valley Sand & Gravel Inc → Sand And Gravel Plant; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** James E  McGill → Sand And Gravel Plant; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James E  McGill → Magic Valley Sand & Gravel Inc; 1950-01-01 to current/open; source msha-controller-operator-history