# Relationship history for MSHA mine 3609475

Current hierarchy: **Robert R  Shingara → Robert Shingara Coal → No 13 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

- **controller_controls_mine:** Shingara Robert R → No 13 Slope; 1979-02-12 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Chestnut Coal Co → No 13 Slope; 2006-10-23 to 2009-11-24; source msha-controller-operator-history
- **controller_controls_operator:** Shingara Robert R → Chestnut Coal Co; 2006-10-23 to 2009-11-24; source msha-controller-operator-history
- **operator_operates_mine:** Robert Shingara Coal → No 13 Slope; 2009-11-25 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Robert R  Shingara → No 13 Slope; 2009-11-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Robert R  Shingara → Robert Shingara Coal; 2009-11-25 to current/open; source msha-controller-operator-history