# Relationship history for MSHA mine 4406445

Current hierarchy: **Barton Channe → S & C Mining Inc → No 2 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:** Barton Channe → No 2 Mine; 1987-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Jackson Jimmie → No 2 Mine; 1987-10-28 to 1990-09-25; source msha-controller-operator-history
- **operator_operates_mine:** Beck-Tawn Coal Company Inc → No 2 Mine; 1988-02-01 to 1989-09-19; source msha-controller-operator-history
- **controller_controls_operator:** Jackson Jimmie → Beck-Tawn Coal Company Inc; 1988-02-01 to 1989-09-19; source msha-controller-operator-history
- **operator_operates_mine:** S & C Mining Inc → No 2 Mine; 1989-09-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Barton Channe → S & C Mining Inc; 1989-09-20 to current/open; source msha-controller-operator-history