# Relationship history for MSHA mine 2103172

Current hierarchy: **Glen R Mathiowetz; Matt  Mathiowetz → M. R. Paving & Excavating, Inc. → Portable Crusher #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

- **controller_controls_mine:** John R  Carlson → Portable Crusher #1; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Timothy C  Rahe → Portable Crusher #1; 1995-03-22 to 2023-01-31; source msha-controller-operator-history
- **operator_operates_mine:** Carlson Brothers Inc → Portable Crusher #1; 1998-07-01 to 2004-05-03; source msha-controller-operator-history
- **controller_controls_operator:** John R  Carlson → Carlson Brothers Inc; 1998-07-01 to 2004-05-03; source msha-controller-operator-history
- **operator_operates_mine:** M. R. Paving & Excavating, Inc. → Portable Crusher #1; 2004-05-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Timothy C  Rahe → M. R. Paving & Excavating, Inc.; 2004-05-04 to 2023-01-31; source msha-controller-operator-history
- **controller_controls_mine:** Matt  Mathiowetz et al → Portable Crusher #1; 2023-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Matt  Mathiowetz et al → M. R. Paving & Excavating, Inc.; 2023-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Glen R Mathiowetz et al → M. R. Paving & Excavating, Inc.; 2023-02-01 to current/open; source msha-controller-operator-history