# Relationship history for MSHA mine 4104649

Current hierarchy: **San Isidro Management LC; Blackstone Dilworth 1998 Trust → San Isidro Ready Mix Ltd. → San Isidro North**

- 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

- **controller_controls_mine:** Blackstone Dilworth 1998 Trust et al → San Isidro North; 2004-05-27 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** San Isidro Ready Mix Ltd. → San Isidro North; 2007-03-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Blackstone Dilworth 1998 Trust et al → San Isidro Ready Mix Ltd.; 2007-03-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** San Isidro Management LC et al → San Isidro Ready Mix Ltd.; 2007-03-02 to current/open; source msha-controller-operator-history