# Relationship history for MSHA mine 1202534

Current hierarchy: **Bryan  Shutt → K & G Engineering, LLC → I-140**

- 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:** K & G Engineering, LLC → I-140; 2026-03-04 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Bryan  Shutt → I-140; 2026-03-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bryan  Shutt → K & G Engineering, LLC; 2026-03-04 to current/open; source msha-controller-operator-history