# Relationship history for MSHA mine 0103079

Current hierarchy: **Robert A  Lewis; Thomas A  Lewis → Birmingham Coal & Coke Company Inc → Elk River Mine**

- 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:** Robert A  Lewis et al → Elk River Mine; 1983-04-01 to 2012-11-04; source msha-controller-operator-history
- **operator_operates_mine:** Birmingham Coal & Coke Company Inc → Elk River Mine; 1996-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Robert A  Lewis et al → Birmingham Coal & Coke Company Inc; 1996-07-01 to 2012-11-04; source msha-controller-operator-history
- **controller_controls_operator:** Thomas A  Lewis et al → Birmingham Coal & Coke Company Inc; 1996-07-01 to 2012-11-04; source msha-controller-operator-history
- **controller_controls_mine:** Radar USA Holding Corp → Elk River Mine; 2012-11-05 to 2017-05-21; source msha-controller-operator-history
- **controller_controls_operator:** Radar USA Holding Corp → Birmingham Coal & Coke Company Inc; 2012-11-05 to 2017-05-21; source msha-controller-operator-history
- **controller_controls_mine:** Robert A  Lewis et al → Elk River Mine; 2017-05-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Robert A  Lewis et al → Birmingham Coal & Coke Company Inc; 2017-05-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Thomas A  Lewis et al → Birmingham Coal & Coke Company Inc; 2017-05-22 to current/open; source msha-controller-operator-history