Tree Guidelines - Protecting Trees During Construction Mayor Fenty has prioritized tree establishment and maintenance in his efforts to revitalize the District. In this light, The Urban Forestry Administration (UFA) has provided the following guidelines regarding the basic concerns and how to avoid problems when doing construction in and around trees: Construction Guidelines * * This document is presented in Portable Document Format (PDF). A PDF reader is required for viewing. Download a PDF Reader or Learn More About PDFs