# Relationship history for MSHA mine 3606863

Current hierarchy: **Stella Robert & Joseph → S & T Coal Company → Nanticoke Bank**

- 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:** Stella Robert & Joseph → Nanticoke Bank; 1976-12-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** S & T Coal Company → Nanticoke Bank; 1979-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Stella Robert & Joseph → S & T Coal Company; 1979-06-01 to current/open; source msha-controller-operator-history