# Relationship history for MSHA mine 4105251

Current hierarchy: **Angel Brothers Holdings Corp → Century Asphalt, LTD. → Legna 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** Century Asphalt, LTD. → Legna Pit; 2017-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Angel Brothers Holdings Corp → Legna Pit; 2017-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Angel Brothers Holdings Corp → Century Asphalt, LTD.; 2017-05-01 to current/open; source msha-controller-operator-history