# Relationship history for MSHA mine 3201088

Current hierarchy: **Andy  Thomas → Energy Sand Solutions LLC → ENERGY SAND SOLUTIONS-HAZEN**

- 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:** Energy Sand Solutions LLC → ENERGY SAND SOLUTIONS-HAZEN; 2022-09-07 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Andy  Thomas → ENERGY SAND SOLUTIONS-HAZEN; 2022-09-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Andy  Thomas → Energy Sand Solutions LLC; 2022-09-07 to current/open; source msha-controller-operator-history