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United States Capitol

Tree Inventory, Risk Assessment, and Arboretum Management

​Urban Canopy Works is honored to provide expert arboricultural services to the Architect of the Capitol (AOC). The AOC is responsible for the management and care of over 5,000 trees within a unique and valuable arboretum in Washington D.C. The trees on the historic Frederick Law Olmstead- designed grounds of Capitol Hill and surrounding government buildings and parks provide the expected benefits of temperature moderation and cooling, reduction of air pollutants, shade, and aesthetics, but are also important cultural and educational resources for visitors.

​Given the historic significance of the Capitol grounds and the sheer number of visitors that travel through and within the arboretum, in 2019 the AOC first placed their confidence in Urban Canopy Works to conduct an inventory of nearly 5,000 trees and to perform a Level 3 risk assessment on approximately 100 mature trees.  Each year since, the UCW team provides AOC with a Level 2 inventory across all grounds, climbing inspections of tree support and lightning protection systems inspections, Level 3 risk assessment services.  

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UCW has also worked to help grow and maintain AOC's 
arboretum accreditation levels, including a comprehensive inventory of woody shrubs, and a regularly-updated Arboretum Management Plan. 
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With the data from the tree inventory, recommendations from the tree risk assessment, and an updated Arboretum Plan, the AOC is better positioned to manage the trees and shrub collections not only as iconic features of an historic landscape and the grounds and as an urban oasis that provides many benefits to visitors and workers in our nation’s capital, but also as an educational resource for all.  
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  • Home
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