# Relationship history for MSHA mine 1901201

Current hierarchy: **Vincent A  Mula → Mula Materials Corporation → Mula Materials Green Street**

- 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:** Mula Materials Corporation → Mula Materials Green Street; 2010-03-10 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Vincent A  Mula → Mula Materials Green Street; 2010-03-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Vincent A  Mula → Mula Materials Corporation; 2010-03-10 to current/open; source msha-controller-operator-history