# Relationship history for MSHA mine 2104112

Current hierarchy: **Larry R  Sanders; Clayton  Sanders → Sanders Const Inc → Cedar Rapids 45 Classic**

- 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:** Sanders Const Inc → Cedar Rapids 45 Classic; 2025-11-06 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Clayton  Sanders et al → Cedar Rapids 45 Classic; 2025-11-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Clayton  Sanders et al → Sanders Const Inc; 2025-11-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Larry R  Sanders et al → Sanders Const Inc; 2025-11-06 to current/open; source msha-controller-operator-history