# Relationship history for MSHA mine 3610215

Current hierarchy: **Timothy M  Smith → Ronald Opeil Flagstone Company LLC → Wartman 1 Quarry**

- 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:** Timothy M  Smith → Wartman 1 Quarry; 2016-03-21 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Ronald Opeil Flagstone Company LLC → Wartman 1 Quarry; 2017-04-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Timothy M  Smith → Ronald Opeil Flagstone Company LLC; 2017-04-25 to current/open; source msha-controller-operator-history