# Relationship history for MSHA mine 1515387

Current hierarchy: **Jones Barry T → Savfin Inc → No 6 Strip**

- 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:** Jones Barry T → No 6 Strip; 1984-05-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Savfin Inc → No 6 Strip; 1985-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jones Barry T → Savfin Inc; 1985-10-01 to current/open; source msha-controller-operator-history