# Relationship history for MSHA mine 3605829

Current hierarchy: **Wrubel John → Atlas Coal Company → Atlas 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:** Atlas Coal Company → Atlas Slope; 1975-09-24 to 1978-10-10; source msha-controller-operator-history
- **controller_controls_mine:** Garber George M → Atlas Slope; 1975-09-24 to 1978-10-10; source msha-controller-operator-history
- **controller_controls_operator:** Garber George M → Atlas Coal Company; 1975-09-24 to 1978-10-10; source msha-controller-operator-history
- **operator_operates_mine:** Atlas Coal Company → Atlas Slope; 1978-10-11 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Wrubel John → Atlas Slope; 1978-10-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Wrubel John → Atlas Coal Company; 1978-10-11 to current/open; source msha-controller-operator-history