# Relationship history for MSHA mine 3503849

Current hierarchy: **Shawn  Teevin → Teevin Bros. Land & Timber Company → Bradley 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

- **operator_operates_mine:** Teevin Bros. Land & Timber Company → Bradley Quarry; 2016-05-16 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Shawn  Teevin → Bradley Quarry; 2016-05-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Shawn  Teevin → Teevin Bros. Land & Timber Company; 2016-05-16 to current/open; source msha-controller-operator-history