# Relationship history for MSHA mine 4404532

Current hierarchy: **Mullins Carl & Sylvia → C & S Coal Company → No 2**

- 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:** Dotson Rail & Dexter → No 2; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** R & D Coal Company → No 2; 1976-10-14 to 1982-05-19; source msha-controller-operator-history
- **controller_controls_operator:** Dotson Rail & Dexter → R & D Coal Company; 1976-10-14 to 1982-05-19; source msha-controller-operator-history
- **controller_controls_mine:** Mullins Carl & Sylvia → No 2; 1981-09-23 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** C & S Coal Company → No 2; 1982-05-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mullins Carl & Sylvia → C & S Coal Company; 1982-05-20 to current/open; source msha-controller-operator-history