# Relationship history for MSHA mine 5400057

Current hierarchy: **Francisco  Robles; Raul  Robles → Robles Aggregates Inc → GRAVERO COTO LAUREL**

- 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:** Inabon Aggregates Inc → GRAVERO COTO LAUREL; 1950-01-01 to 1997-02-26; source msha-controller-operator-history
- **controller_controls_mine:** Alfonso Hernandez  Torres → GRAVERO COTO LAUREL; 1950-01-01 to 1997-02-26; source msha-controller-operator-history
- **controller_controls_operator:** Alfonso Hernandez  Torres → Inabon Aggregates Inc; 1950-01-01 to 1997-02-26; source msha-controller-operator-history
- **operator_operates_mine:** Robles Aggregates Inc → GRAVERO COTO LAUREL; 1997-02-27 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Raul  Robles et al → GRAVERO COTO LAUREL; 1997-02-27 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Raul  Robles et al → Robles Aggregates Inc; 1997-02-27 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Francisco  Robles et al → Robles Aggregates Inc; 1997-02-27 to current/open; source msha-controller-operator-history