# Relationship history for MSHA mine 2003663

Current hierarchy: **Charles E  Stringer → Thumb Aggregate Sales LLC → Superior Plant 2**

- 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:** Charles E  Stringer → Superior Plant 2; 2016-07-24 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Thumb Aggregate Sales LLC → Superior Plant 2; 2023-08-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Charles E  Stringer → Thumb Aggregate Sales LLC; 2023-08-24 to current/open; source msha-controller-operator-history