# Relationship history for MSHA mine 4703603

Current hierarchy: **James F  Melvin → Francis Melvin Inc. → Kolberg Screen Plant**

- 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:** James F  Melvin → Kolberg Screen Plant; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Francis Melvin Inc. → Kolberg Screen Plant; 2011-03-29 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James F  Melvin → Francis Melvin Inc.; 2011-03-29 to current/open; source msha-controller-operator-history