# Relationship history for MSHA mine 2003343

Current hierarchy: **Dale A  Klett → Klett Recycle, Inc. → Portable Plant No.1**

- 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:** Klett Recycle, Inc. → Portable Plant No.1; 2005-12-16 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Dale A  Klett → Portable Plant No.1; 2005-12-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dale A  Klett → Klett Recycle, Inc.; 2005-12-16 to current/open; source msha-controller-operator-history