HomeMy WebLinkAboutARCH-0161-2019 Arborist Report Proposed Parking structure existing Trees
Arborist Assessment of Trees
Date: January 17, 2022
Site: Proposed Parking Structure
Tree Number/Species: 8 Cinnamomum camphora
9 Tristania conferta
10 Platenus X acerfolia
15, 16 Quercus agrifolia
Observed –
#8 – (11 trees) Camphor – Trees have a somewhat thin canopy overall. Those that are in the narrowest planters
have more discoloration and thinner canopies. Roots have filled the smaller planters (root bound) and soil is
very compacted. Poorly drained soil. Trees in some areas are cracking curbs and lifting pavements.
#9 – (5) Brisbane Box – Canopy health and vigor range from healthy to poor. These are planted in very narrow
planters, and all are root bound. Soil is compacted and drains poorly. Trees are very tall and have been skirted
up high. Roots are breaking curbs, cracking and lifting walks and lifting pavement. Trees have outgrown the
planters.
#10 – (22) – London Plane – Trees are dormant so health can not be fully assessed. Planted in extremely small
planters they are all root bound. Soil is compacted and poorly drained. I di note some cankers on smaller
branches and twigs. Trimming has been excessive and they are skirted up high. Trees likely will decline due to
poor rooting conditions (small planters).
#15 (9) #16 (4) – Coast Live Oak – The smaller trees (#15) are mostly healthy the larger trees (#16) that are in
larger planters are much healthier than those in small planters. Planters are somewhat compacted and may not
drain well. Larger planters are okay but not great.
Reason for removal – Most of these trees are in the direct foot print of the proposed parking garage or its
appurtenances (walkways, utilities etc.). Parking areas outside of the structure is slated for modifications and
repave that will affect trees as well. Existing oaks beyond the construction will be protected and maintained.
Chris Stier
ISA Certified Arborist WE9262-A
*Assessment was made with observation, history and sound arboricultural and horticultural knowledge. It is always possible that
other, or different problems exist that may contribute to the destabilization, decline and death of trees. Further evaluation may be
warranted if the steps above do not work. Construction activities can seriously disrupt roots and soils and lead to long term
problems that may directly or indirectly cause a tree to decline and die.
This Brisbane Box is a good example of narrow planters which are now root bound and poorly drained The tree
has outgrown its space. Note how the curb was removed to accommodate the trunk. Also note how the sidewalk
had to be planed to correct lifting. The Brisbane Box and London Plane trees all are like this.