# Relationship history for MSHA mine 3610317

Current hierarchy: **Ray A  Darby → R.S. SERVICES → J45**

- 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:** Ray A  Darby → J45; 2009-06-16 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** R.S. Services → J45; 2020-03-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ray A  Darby → R.S. Services; 2020-03-26 to current/open; source msha-controller-operator-history