# Relationship history for MSHA mine 1601523

Current hierarchy: **Victor S  Phillip; Sandra M Phillip → VSP Materials, Inc. → VSP Materials, Inc.**

- 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:** VSP Materials, Inc. → VSP Materials, Inc.; 2012-01-30 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Sandra M Phillip et al → VSP Materials, Inc.; 2012-01-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Sandra M Phillip et al → VSP Materials, Inc.; 2012-01-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Victor S  Phillip et al → VSP Materials, Inc.; 2012-01-30 to current/open; source msha-controller-operator-history