# Relationship history for MSHA mine 3003986

Current hierarchy: **County Of Oswego-Ny → OSWEGO COUNTY HIGHWAY DEPARTMENT → 2016 MCCLOSKEY SCREEN, OS#252**

- 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:** County Of Oswego-Ny → 2016 MCCLOSKEY SCREEN, OS#252; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Oswego County Highway Department → 2016 MCCLOSKEY SCREEN, OS#252; 2016-12-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** County Of Oswego-Ny → Oswego County Highway Department; 2016-12-13 to current/open; source msha-controller-operator-history