# Relationship history for MSHA mine 4602463

Current hierarchy: **Sorbello Charles J → Bell Mining Company → Bell Mining Tipple**

- 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:** Sorbello Charles J → Bell Mining Tipple; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Bay State Mining Co Inc → Bell Mining Tipple; 1950-01-01 to 1974-04-24; source msha-controller-operator-history
- **controller_controls_mine:** Bay State Mining Co Inc → Bell Mining Tipple; 1950-01-01 to 1974-04-24; source msha-controller-operator-history
- **controller_controls_operator:** Bay State Mining Co Inc → Bay State Mining Co Inc; 1950-01-01 to 1974-04-24; source msha-controller-operator-history
- **operator_operates_mine:** Bell Mining Company → Bell Mining Tipple; 1974-04-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Sorbello Charles J → Bell Mining Company; 1974-04-25 to current/open; source msha-controller-operator-history