# Relationship history for MSHA mine 3401168

Current hierarchy: **Major County-Ok → Major County → Fuzzell 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** Major County → Fuzzell Sand & Gravel; 1979-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Major County-Ok → Fuzzell Sand & Gravel; 1979-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Major County-Ok → Major County; 1979-01-01 to current/open; source msha-controller-operator-history