# Relationship history for MSHA mine 3610309

Current hierarchy: **David D  Osikowicz Jr → Original Fuels, Inc. → Dora Mine**

- 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:** David D  Osikowicz Jr → Dora Mine; 1984-04-04 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Original Fuels, Inc. → Dora Mine; 2019-11-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** David D  Osikowicz Jr → Original Fuels, Inc.; 2019-11-18 to current/open; source msha-controller-operator-history