# Relationship history for MSHA mine 3610311

Current hierarchy: **Ray A  Darby → R S Services → I54 McCloskey**

- 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 → I54 McCloskey; 2009-06-16 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** R S Services → I54 McCloskey; 2019-12-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ray A  Darby → R S Services; 2019-12-17 to current/open; source msha-controller-operator-history