# Relationship history for MSHA mine 4606181

Current hierarchy: **Callison W T → Little Sewell Mountain Coal Company → Little Sewell Mt Coal Co 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Little Sewell Mountain Coal Company → Little Sewell Mt Coal Co No 1; 1980-07-01 to 1984-12-01; source msha-controller-operator-history
- **controller_controls_mine:** Callison W T → Little Sewell Mt Coal Co No 1; 1980-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Callison W T → Little Sewell Mountain Coal Company; 1980-07-01 to 1984-12-01; source msha-controller-operator-history
- **operator_operates_mine:** Seice Corp → Little Sewell Mt Coal Co No 1; 1984-12-02 to 1985-03-24; source msha-controller-operator-history
- **controller_controls_mine:** Justice Danny K → Little Sewell Mt Coal Co No 1; 1984-12-02 to 1985-03-24; source msha-controller-operator-history
- **controller_controls_operator:** Justice Danny K → Seice Corp; 1984-12-02 to 1985-03-24; source msha-controller-operator-history
- **operator_operates_mine:** Little Sewell Mountain Coal Company → Little Sewell Mt Coal Co No 1; 1985-03-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Callison W T → Little Sewell Mountain Coal Company; 1985-03-25 to current/open; source msha-controller-operator-history