# Relationship history for MSHA mine 0505206

Current hierarchy: **Kasie  Smith; Russell  Smith → 4X Gravel, LLC → Four X Ranch Gravel Pit**

- 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:** 4X Gravel, LLC → Four X Ranch Gravel Pit; 2026-01-05 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Russell  Smith et al → Four X Ranch Gravel Pit; 2026-01-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Russell  Smith et al → 4X Gravel, LLC; 2026-01-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kasie  Smith et al → 4X Gravel, LLC; 2026-01-05 to current/open; source msha-controller-operator-history