# Relationship history for MSHA mine 5001737

Current hierarchy: **Jerry  Fletcher → Tamsher Enterprises & Rentals Inc → Portable #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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Jerry  Fletcher → Portable #1; 1995-06-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Tamsher Construction Inc. → Portable #1; 2002-06-19 to 2004-05-25; source msha-controller-operator-history
- **controller_controls_operator:** Jerry  Fletcher → Tamsher Construction Inc.; 2002-06-19 to 2004-05-25; source msha-controller-operator-history
- **operator_operates_mine:** Earthmoving Specialists → Portable #1; 2004-05-26 to 2005-03-21; source msha-controller-operator-history
- **controller_controls_mine:** Mike  Smith → Portable #1; 2004-05-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mike  Smith → Earthmoving Specialists; 2004-05-26 to 2005-03-21; source msha-controller-operator-history
- **operator_operates_mine:** Tamsher Enterprises & Rentals Inc → Portable #1; 2005-03-22 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Jerry  Fletcher → Portable #1; 2005-03-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jerry  Fletcher → Tamsher Enterprises & Rentals Inc; 2005-03-22 to current/open; source msha-controller-operator-history