# Relationship history for MSHA mine 4607021

Current hierarchy: **Cline Kenneth S → Casey Coal Company Inc → Little Tina 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Cline Kenneth S → Little Tina Mine; 1984-04-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Casey Coal Company Inc → Little Tina Mine; 1985-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Cline Kenneth S → Casey Coal Company Inc; 1985-10-01 to current/open; source msha-controller-operator-history