# Relationship history for MSHA mine 4603440

Current hierarchy: **Sears Casey & Emery Smallman → Taner Coal Company Inc → No 1 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

- **operator_operates_mine:** H & S Coal Company → No 1 Mine; 1950-01-01 to 1973-11-30; source msha-controller-operator-history
- **controller_controls_mine:** Suffridge James S → No 1 Mine; 1950-01-01 to 1973-11-30; source msha-controller-operator-history
- **controller_controls_operator:** Suffridge James S → H & S Coal Company; 1950-01-01 to 1973-11-30; source msha-controller-operator-history
- **operator_operates_mine:** Taner Coal Company Inc → No 1 Mine; 1973-12-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Sears Casey & Emery Smallman → No 1 Mine; 1973-12-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Sears Casey & Emery Smallman → Taner Coal Company Inc; 1973-12-01 to current/open; source msha-controller-operator-history