# Relationship history for MSHA mine 1509363

Current hierarchy: **Kaneb Services Inc → United States Coal Company Inc → No 1 Surface**

- 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:** United States Coal Company → No 1 Surface; 1975-08-01 to 1977-10-19; source msha-controller-operator-history
- **controller_controls_mine:** Rogers Odell → No 1 Surface; 1975-08-01 to 1977-10-19; source msha-controller-operator-history
- **controller_controls_operator:** Rogers Odell → United States Coal Company; 1975-08-01 to 1977-10-19; source msha-controller-operator-history
- **operator_operates_mine:** United States Coal Company Inc → No 1 Surface; 1977-10-20 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Kaneb Services Inc → No 1 Surface; 1977-10-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kaneb Services Inc → United States Coal Company Inc; 1977-10-20 to current/open; source msha-controller-operator-history