Black Tea tree to be removed in Denison Road

Showing the split in the trunk

Marrickville Council has given notice that they intend to remove 3 public trees in Lewisham.

Tree 1:  A Black Tea tree (Melaleuca bracteata) outside 99 Denison Road Lewisham.

They give the following reason for removal –

  • “A tree assessment has identified an active shear split between the tree’s codominant stems.  The tree poses an unacceptable hazard to the public.”

Council says they will replace this tree with another Black Tea tree (Melaleuca bracteata) during the 2012-2013 replacement tree planting program.

The tree on the left is to be removed

Tree 2:  A Magenta Cherry (Syzygium paniculatum) at 115-117 Constitution Road

Showing the split – with complimentary poo bag

(rear southern boundary); opposite 217 Denison Road, Lewisham.

Council give the following reason for removal –

  • “A tree assessment has identified an active shear split between the tree’s codominant stem (main trunk). The tree poses an unacceptable hazard to the public.”

Council says they will replace this tree with another Magenta Cherry (Syzygium paniculatum) during the 2012-2013 replacement tree planting program.

Arborism 101:  1. shear split  2. codominant stem.

1. Shear cracks, a type of vertical crack, become hazardous when they go completely through the stem & separate the stem into two halves. As the tree bends & sways in the wind, one half of the stem slides over the other, elongating the crack. Eventually the enlarging crack causes the two halves of the stem to shear apart. A shear crack always has a high risk of failure.” http://www.southerntreeservices.com/pdf/cracks_in_trees.pdf

2. The term “codominant stems” is used to describe 2 or more main stems (or “leaders”) that are about the same diameter & emerge from the same location on the main trunk.  As the tree grows older, the stems remain similar in size without any single one becoming dominant.  Codominant stems tend to fail much more often than others, especially in storms.”  http://www.umass.edu/urbantree/factsheets/35codominantstems_rev1.html

Showing the decay in the Toothill Street tree

Tree 3: A Golden Robinia (Robinia pseudoacacia ‘frisia’) at the corner Denison Street

Golden Robinia to be removed in Toothill Street

& Toothill Street Lewisham.

Council give the following reason for removal –

  • “A tree assessment has identified significant trunk decay extending into the tree’s basal flare.  The tree poses an unacceptable hazard to the public.”

Council says they will replace this tree with another Golden Robinia (Robinia pseudoacacia ‘frisia’) the 2012-2013 replacement tree planting program.

The deadline for any submissions for all of the above trees is Friday 13th July 2012.

Arborism 101: Basal flare – The basal flare is the part of the trunk where the trunk starts getting larger just before the roots start leaving the tree.” http://anse.rs/N55xPI  So, with this tree, decay goes all the way to  the base of the tree.

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