# Relationship history for MSHA mine 5400261

Current hierarchy: **Torres Hector → Gurabo Aggregates Inc → Gurabo Aggregates**

- 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:** Cartagena Espanola En Puerto Rico Inc → Gurabo Aggregates; 1981-03-01 to 1984-08-29; source msha-controller-operator-history
- **controller_controls_mine:** Martinez Cayetano → Gurabo Aggregates; 1981-03-01 to 1984-08-29; source msha-controller-operator-history
- **controller_controls_operator:** Martinez Cayetano → Cartagena Espanola En Puerto Rico Inc; 1981-03-01 to 1984-08-29; source msha-controller-operator-history
- **operator_operates_mine:** Gurabo Aggregates Inc → Gurabo Aggregates; 1984-08-30 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Torres Hector → Gurabo Aggregates; 1984-08-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Torres Hector → Gurabo Aggregates Inc; 1984-08-30 to current/open; source msha-controller-operator-history