# Relationship history for MSHA mine 3610465

Current hierarchy: **Samuel Scott Grannas → GRANNAS BROS. SAND & STONE LLC → GRANNAS BROS. SAND & STONE 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:** Grannas Bros. Sand & Stone LLC → GRANNAS BROS. SAND & STONE LLC; 2025-02-28 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Samuel Scott Grannas → GRANNAS BROS. SAND & STONE LLC; 2025-02-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Samuel Scott Grannas → Grannas Bros. Sand & Stone LLC; 2025-02-28 to current/open; source msha-controller-operator-history