# Relationship history for MSHA mine 3602104

Current hierarchy: **Shalamanda Stephen Jr → D R Z Coal Company → No 5 Vein Slope**

- 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:** D R Z Coal Company → No 5 Vein Slope; 1950-01-01 to 1978-08-23; source msha-controller-operator-history
- **controller_controls_mine:** Shalamanda Steve → No 5 Vein Slope; 1950-01-01 to 1978-08-23; source msha-controller-operator-history
- **controller_controls_operator:** Shalamanda Steve → D R Z Coal Company; 1950-01-01 to 1978-08-23; source msha-controller-operator-history
- **operator_operates_mine:** D R Z Coal Company → No 5 Vein Slope; 1978-08-24 to 1980-02-04; source msha-controller-operator-history
- **controller_controls_mine:** Shalamanda Anthony → No 5 Vein Slope; 1978-08-24 to 1980-02-04; source msha-controller-operator-history
- **controller_controls_operator:** Shalamanda Anthony → D R Z Coal Company; 1978-08-24 to 1980-02-04; source msha-controller-operator-history
- **operator_operates_mine:** D R Z Coal Company → No 5 Vein Slope; 1980-02-05 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Shalamanda Stephen Jr → No 5 Vein Slope; 1980-02-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Shalamanda Stephen Jr → D R Z Coal Company; 1980-02-05 to current/open; source msha-controller-operator-history