# Relationship history for MSHA mine 2103659

Current hierarchy: **Dean  Cumber → Cumber Construction, Inc. → Terex/Cedarapids Portable Screening Plant**

- 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:** Dean  Cumber → Terex/Cedarapids Portable Screening Plan; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Cumber Construction, Inc. → Terex/Cedarapids Portable Screening Plan; 2009-03-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dean  Cumber → Cumber Construction, Inc.; 2009-03-30 to current/open; source msha-controller-operator-history