# Relationship history for MSHA mine 5001738

Current hierarchy: **Jerry  Fletcher → Tamsher Construction Inc. → Portable # 2**

- 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:** Jerry  Fletcher → Portable # 2; 1995-06-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Tamsher Construction Inc. → Portable # 2; 2002-06-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jerry  Fletcher → Tamsher Construction Inc.; 2002-06-19 to current/open; source msha-controller-operator-history