# Relationship history for MSHA mine 3607501

Current hierarchy: **Suto R P → R P Suto Coal & Minerals Inc → Barbara Rail Siding**

- 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:** R P Suto Coal & Minerals Inc → Barbara Rail Siding; 1983-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Suto R P → Barbara Rail Siding; 1983-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Suto R P → R P Suto Coal & Minerals Inc; 1983-10-01 to current/open; source msha-controller-operator-history