# Relationship history for MSHA mine 3607255

Current hierarchy: **Anglo United PLC → Coal Contractors Inc → Gowen Cleaning 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:** Louis J  Beltrami → Gowen Cleaning Plant; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Beltrami Enterprises Inc → Gowen Cleaning Plant; 1981-12-01 to 1982-08-24; source msha-controller-operator-history
- **controller_controls_operator:** Louis J  Beltrami → Beltrami Enterprises Inc; 1981-12-01 to 1982-08-24; source msha-controller-operator-history
- **operator_operates_mine:** Coal Contractors Inc → Gowen Cleaning Plant; 1982-08-25 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Anglo United PLC → Gowen Cleaning Plant; 1982-08-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Anglo United PLC → Coal Contractors Inc; 1982-08-25 to current/open; source msha-controller-operator-history