HomeMy WebLinkAboutARCH-0161-2019 Arborist Report FAA Transitional air space north-
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Arborist Assessment of Trees
Date: January 17, 2022
Site: FAA Transitional Air Space North
Tree Number/Species: #13 (8 trees) Eucalyptus globulus
Observed – Very tall Blue Gum Eucalyptus. Canopy is healthy, not particularly thick, and new growth is noted.
Noted some dieback in certain trees. Branches range from well-placed and well attached to some narrow angles
and poor attachments. Trunks/stems are mostly straight. Trees have not been maintained. These trees are within
the FAA transitional surface zone for exiting helicopters.
Reason for removal – Trees are close to the air space needed for medivac helicopter flights. The FAA considers
this area as Transitional Surface: “Transitional Surface – An area not directly below a flight path that allows for
clearance on either side.” Tall trees such as these falls into the category as being a clearance issue. Without
removal of the trees, medivac flights at the hospital will not be permitted. Trimming these trees lower is not
possible as there are no branches to trim down to and still meet the FAA requirements (i.e., trees would be
stubbed).
Near by Coast Live Oak trees will remain as they are not a clearance issue. Removal of these Blue Gum’s may
actually help the oaks as they will have more light, room and less competition for water and nutrients.
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 is the group of 8 trees that need removal for Transitional Surface requirements from FAA.