# Relationship history for MSHA mine 4801039

Current hierarchy: **Sulenta John M → Sulenta Construction Company Inc → Sulenta 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

- **operator_operates_mine:** Sulenta Construction Company Inc → Sulenta Sand & Gravel; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Sulenta John M → Sulenta Sand & Gravel; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Sulenta John M → Sulenta Construction Company Inc; 1950-01-01 to current/open; source msha-controller-operator-history