# Relationship history for MSHA mine 5001649

Current hierarchy: **James W Baxter; Robert W Baxter → Northern Gravel & Trucking LLC → Northern Gravel & Trucking**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-18T09:31:49.615908+00:00

## Valid-time edges

- **operator_operates_mine:** Baxter Inc. → Northern Gravel & Trucking; 1999-06-01 to 2016-10-06; source msha-controller-operator-history
- **controller_controls_mine:** James  Baxter → Northern Gravel & Trucking; 1999-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James  Baxter → Baxter Inc.; 1999-06-01 to 2016-10-06; source msha-controller-operator-history
- **operator_operates_mine:** Northern Gravel & Trucking LLC → Northern Gravel & Trucking; 2016-10-07 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** James W Baxter → Northern Gravel & Trucking; 2016-10-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James W Baxter → Northern Gravel & Trucking LLC; 2016-10-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Robert W Baxter → Northern Gravel & Trucking LLC; 2016-10-07 to current/open; source msha-controller-operator-history