# Relationship history for MSHA mine 4404227

Current hierarchy: **Looney Ernest & Kendall → E & K Coal Co Inc → Surface 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

- **controller_controls_mine:** South Atlantic Coal Company Inc → Surface No 1; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Lester Coal Company → Surface No 1; 1975-10-01 to 1975-10-31; source msha-controller-operator-history
- **controller_controls_operator:** South Atlantic Coal Company Inc → Lester Coal Company; 1975-10-01 to 1975-10-31; source msha-controller-operator-history
- **operator_operates_mine:** E & K Coal Co Inc → Surface No 1; 1975-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Looney Ernest & Kendall → Surface No 1; 1975-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Looney Ernest & Kendall → E & K Coal Co Inc; 1975-11-01 to current/open; source msha-controller-operator-history