# Relationship history for MSHA mine 1519980

Current hierarchy: **James H  Riley (Jr) → Marshall County Sand & Gravel, LLC. → Marshall County Sand & Gravel, LLC.**

- 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:** Marshall County Sand & Gravel, LLC. → Marshall County Sand & Gravel, LLC.; 2025-11-05 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** James H  Riley (Jr) → Marshall County Sand & Gravel, LLC.; 2025-11-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James H  Riley (Jr) → Marshall County Sand & Gravel, LLC.; 2025-11-05 to current/open; source msha-controller-operator-history