# Relationship history for MSHA mine 4404492

Current hierarchy: **Elkins Charles C → Hursel H Coal Company Inc → Mine No 1**

- 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

- **operator_operates_mine:** Hursel H Coal Company Inc → Mine No 1; 1976-07-02 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Elkins Charles C Et Al → Mine No 1; 1976-07-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Elkins Charles C Et Al → Hursel H Coal Company Inc; 1976-07-02 to current/open; source msha-controller-operator-history