# Relationship history for MSHA mine 4105816

Current hierarchy: **Pablo  Calatrava → All Sands and Minerals, Corp. → Post Oak No 1**

- 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:** All Sands and Minerals, Corp. → Post Oak No 1; 2025-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Pablo  Calatrava → Post Oak No 1; 2025-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Pablo  Calatrava → All Sands and Minerals, Corp.; 2025-04-01 to current/open; source msha-controller-operator-history