Cambridge's Water-by-Bike program was modeled after the Water By-Cycle program created by Casey Trees. Photo Courtesy City of
Cambridge, MA
RH: What other practices are you implementing in
Cambridge that you feel other communities could
benefit from knowing about?
DL: We realize that heaving pavement can pose
unsafe conditions, can be unsightly, and is not helpful
to the trees, so we are proactive about the issue of
tree root-sidewalk conflict. We routinely assess the
condition of our trees and that includes identifying any
side walk/curb conflicts. I work with contractors as
we attempt to address the issue and protect the tree
at the same time. In Cambridge, roots greater than 2
inches (5 cm) in diameter can only be cut or shaved
with my approval as the city arborist. To address
root-sidewalk conflicts in the long term, we are exper-
imenting with structural/engineered soils to provide
more sub-sidewalk rooting space, in combination with
flexible pavement.
RH: Any final thoughts, say, for new urban foresters?
DL:Yes, remain vigilant, whether it is a tree planting
effort, or addressing a sidewalk conflict or performing a
tree removal. Take the steps to make sure that the job
is done well, and learn from your mistakes along the
way. Also, though we have punitive mechanisms in place
here in Cambridge to fine contractors that blatantly
disregard local ordinances/laws, I feel it is important to
make a good faith effort to attempt to work cooperative-
ly with all of the folks that are involved.
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