# Relationship history for MSHA mine 4104429

Current hierarchy: **William Clay  Coleman → South Texas Aggregates, Inc. → Roca Real Caliche 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

- **controller_controls_mine:** William Clay  Coleman → Roca Real Caliche Pit; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** South Texas Aggregates, Inc. → Roca Real Caliche Pit; 2003-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** William Clay  Coleman → South Texas Aggregates, Inc.; 2003-05-01 to current/open; source msha-controller-operator-history