# Relationship history for MSHA mine 4105822

Current hierarchy: **Somaiah  Kurre → Texas Concrete Sand and Gravel San Jac, LLC → San Jac Plant**

- 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:** Texas Concrete Sand and Gravel San Jac, LLC → San Jac Plant; 2025-08-22 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Somaiah  Kurre → San Jac Plant; 2025-08-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Somaiah  Kurre → Texas Concrete Sand and Gravel San Jac, LLC; 2025-08-22 to current/open; source msha-controller-operator-history