# Relationship history for MSHA mine 3002670

Current hierarchy: **Fulton County Highway Department → Fulton County Highway Department → Fulton County Sand & Gravel**

- 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

- **controller_controls_mine:** Fulton County Highway Department → Fulton County Sand & Gravel; 1984-04-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Fulton County Highway Department → Fulton County Sand & Gravel; 1984-12-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Fulton County Highway Department → Fulton County Highway Department; 1984-12-01 to current/open; source msha-controller-operator-history