# Relationship history for MSHA mine 1002001

Current hierarchy: **Clint  Meckel → Meckel Mining, Inc. → Meckel Mining Portable Rock Crusher**

- 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:** Tom Meckel Sand & Gravel Inc → Meckel Mining Portable Rock Crusher; 2001-05-01 to 2007-02-14; source msha-controller-operator-history
- **controller_controls_mine:** Thomas P  Meckel → Meckel Mining Portable Rock Crusher; 2001-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Thomas P  Meckel → Tom Meckel Sand & Gravel Inc; 2001-05-01 to 2007-02-14; source msha-controller-operator-history
- **operator_operates_mine:** Meckel Crushing, Inc. → Meckel Mining Portable Rock Crusher; 2007-02-15 to 2011-02-14; source msha-controller-operator-history
- **controller_controls_mine:** Clint  Meckel → Meckel Mining Portable Rock Crusher; 2007-02-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Clint  Meckel → Meckel Crushing, Inc.; 2007-02-15 to 2011-02-14; source msha-controller-operator-history
- **controller_controls_mine:** Thomas P  Meckel → Meckel Mining Portable Rock Crusher; 2007-02-15 to 2012-08-31; source msha-controller-operator-history
- **operator_operates_mine:** Meckel Mining, Inc. → Meckel Mining Portable Rock Crusher; 2011-02-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Thomas P  Meckel → Meckel Mining, Inc.; 2011-02-15 to 2012-08-31; source msha-controller-operator-history
- **controller_controls_mine:** Clint  Meckel → Meckel Mining Portable Rock Crusher; 2012-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Clint  Meckel → Meckel Mining, Inc.; 2012-09-01 to current/open; source msha-controller-operator-history