# Relationship history for MSHA mine 3700205

Current hierarchy: **Enrico F  DiGregorio → DiGregorio Corporation → Brighter Vision**

- 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:** Bella Sand → Brighter Vision; 2008-03-03 to 2023-08-27; source msha-controller-operator-history
- **controller_controls_mine:** Enrico F  DiGregorio → Brighter Vision; 2008-03-03 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Enrico F  DiGregorio → Bella Sand; 2008-03-03 to 2023-08-27; source msha-controller-operator-history
- **operator_operates_mine:** DiGregorio Corporation → Brighter Vision; 2023-08-28 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Enrico F  DiGregorio → Brighter Vision; 2023-08-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Enrico F  DiGregorio → DiGregorio Corporation; 2023-08-28 to current/open; source msha-controller-operator-history