# Relationship history for MSHA mine 4104956

Current hierarchy: **Thomas A  Gaedtke → N-Tex Sand & Gravel Wolf Creek, LLC → Wolf Creek**

- 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:** N-Tex Sand & Gravel Wolf Creek, LLC → Wolf Creek; 2012-08-27 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Thomas A  Gaedtke et al → Wolf Creek; 2012-08-27 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Thomas A  Gaedtke et al → N-Tex Sand & Gravel Wolf Creek, LLC; 2012-08-27 to current/open; source msha-controller-operator-history