# Relationship history for MSHA mine 4003615

Current hierarchy: **Hector  Vasquez Gomez → Vasquez Stone → Old Spencer Rd Quarry**

- 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:** Craig  Brown → Old Spencer Rd Quarry; 2010-04-12 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Craig Brown → Old Spencer Rd Quarry; 2024-05-29 to 2024-11-04; source msha-controller-operator-history
- **controller_controls_operator:** Craig  Brown → Craig Brown; 2024-05-29 to 2024-11-04; source msha-controller-operator-history
- **operator_operates_mine:** Vasquez Stone → Old Spencer Rd Quarry; 2024-11-05 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Hector  Vasquez Gomez → Old Spencer Rd Quarry; 2024-11-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Hector  Vasquez Gomez → Vasquez Stone; 2024-11-05 to current/open; source msha-controller-operator-history