# Relationship history for MSHA mine 2602067

Current hierarchy: **Clesson Donald O → Dimension Mining & Milling Ltd → Golden Bell Mill**

- 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:** Dimension Mining & Milling Ltd → Golden Bell Mill; 1988-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Clesson Donald O Et Al → Golden Bell Mill; 1988-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Clesson Donald O Et Al → Dimension Mining & Milling Ltd; 1988-07-01 to current/open; source msha-controller-operator-history