# Relationship history for MSHA mine 4404179

Current hierarchy: **Dotson Bobby & James Little → Triangle Coal Company → 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:** Corbin Eugene  Cline et al → No 2 Mine; 1975-03-26 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Dotson Bobby & James Little → No 2 Mine; 1975-09-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** C & S Coal Company → No 2 Mine; 1975-09-29 to 1976-03-02; source msha-controller-operator-history
- **controller_controls_operator:** Corbin Eugene  Cline et al → C & S Coal Company; 1975-09-29 to 1976-03-02; source msha-controller-operator-history
- **operator_operates_mine:** Triangle Coal Company → No 2 Mine; 1976-03-03 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dotson Bobby & James Little → Triangle Coal Company; 1976-03-03 to current/open; source msha-controller-operator-history