(Portland, OR) -- An iconic elm tree that's been in downtown Portland since 1870 will be cut down. It's the city's first Heritage Tree and is located on Southwest 10th Avenue between Jefferson and Main streets. It's also likely the oldest elm in Oregon. It's known as the Burrel elm or Rosa's tree, in honor of Rosetta Burrel, a prominent social reformer in Portland. In January, the tree suffered extensive damage during a storm. On July 20th, another large limb fell. Arborists say the tree is too damaged and unhealthy to remain. The tree will be removed in early August.