Portland Heritage Tree Program, 1120 SE Fifth Avenue, Suite 1302, Portland, Oregon. Telephone: 503-823-8733. The program is managed by the city’s Urban Forestry Commission. Nominations forms may be downloaded off the program website. The program hosts a searchable online heritage tree database on the city’s website. A program 2016 Heritage Trees Guidebook is available as an online download or for sale. Print copies (black and white) are available from the Urban Forestry office for $5. To receive a copy, please send a $5 check to: PP&R Urban Forestry, Heritage Tree Program, 10910 N. Denver Ave, Portland, OR 97217.