# Relationship history for MSHA mine 5400463

Current hierarchy: **Enrique  Betancourt → Frenber Inc → Guaynabo Sand Pta. 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Adelco Contractor Corp → Guaynabo Sand Pta. 1; 2006-04-26 to 2006-12-04; source msha-controller-operator-history
- **controller_controls_mine:** Adaberto  Garcia → Guaynabo Sand Pta. 1; 2006-04-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Adaberto  Garcia → Adelco Contractor Corp; 2006-04-26 to 2006-12-04; source msha-controller-operator-history
- **operator_operates_mine:** Movement, Earth, Transport, Aggregate, Corp. → Guaynabo Sand Pta. 1; 2006-12-05 to 2012-07-09; source msha-controller-operator-history
- **controller_controls_mine:** Marcos  Navarro → Guaynabo Sand Pta. 1; 2006-12-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Marcos  Navarro → Movement, Earth, Transport, Aggregate, Corp.; 2006-12-05 to 2012-07-09; source msha-controller-operator-history
- **operator_operates_mine:** Frenber Inc → Guaynabo Sand Pta. 1; 2012-07-10 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Enrique  Betancourt → Guaynabo Sand Pta. 1; 2012-07-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Enrique  Betancourt → Frenber Inc; 2012-07-10 to current/open; source msha-controller-operator-history