# Relationship history for MSHA mine 1513167

Current hierarchy: **Beddow James A & Edna Ruth → E R Trucking Company Inc → River Venture**

- 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:** River Venture Company → River Venture; 1981-10-01 to 1987-08-17; source msha-controller-operator-history
- **controller_controls_mine:** Smith Jim Contracting Co Inc & Jader Fuel Inc → River Venture; 1981-10-01 to 1987-08-17; source msha-controller-operator-history
- **controller_controls_operator:** Smith Jim Contracting Co Inc & Jader Fuel Inc → River Venture Company; 1981-10-01 to 1987-08-17; source msha-controller-operator-history
- **controller_controls_mine:** Beddow James A & Edna Ruth Et Al → River Venture; 1986-10-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** E R Trucking Company Inc → River Venture; 1987-08-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Beddow James A & Edna Ruth Et Al → E R Trucking Company Inc; 1987-08-18 to current/open; source msha-controller-operator-history