What are Grand Trees and why are they important?
Trees produce oxygen,
provide wildlife habitat and play many important ecological
roles. Certain trees also provide psychological benefits in
response to their impressive size and great character. Such
trees have been determined by Sarasota County to be “Grand” in
nature. Grand Trees are an especially significant component of
Sarasota County’s urban forest and have a unique and intrinsic
value to the general public because of their character, age,
size, and ecological importance.
The adoption of a program for the
designation and preservation of Grand Trees within Sarasota
County promotes the health and economic well being of the
residents and property owners in Sarasota.
Does your tree qualify as a Grand Tree?

What criteria
must be met for a tree to be “Grand”?
In Sarasota County a tree
is considered for “Grand” status if it meets or exceeds the
number of points given in Table 1.
|
Table 1. Criteria for Grand Trees |
|
|
Species of Tree |
Minimum Points |
| American
elm (Ulmus americana) |
100 |
| Bald
cypress (Taxodium distichum) |
100 |
| Hickory
(Carya spp.) 100 |
100 |
| Live oak
(Quercus virginiana) |
100 |
| Pine (Pinus
spp.) |
100 |
| Red bay
(Persea borbonia) |
85 |
| Sand
live oak (Quercus geminata) |
80 |
| Southern
magnolia (Magnolia grandiflora) |
80 |
Three different measurements need
to be taken in order to determine the points for a particular
tree.
- The first measurement is the
Diameter at Breast Height or DBH.
- This is the diameter of
the trunk 54 inches above the ground.
- If branches or stem
junctures prevent taking this measurement at 54 inches
above the ground then a different measurement must be
taken.
- The alternative
measurement is below the juncture where the trunk is
comprised of one main leader that is not forked.
- The second measurement is of
the Height of the tree.
- This is taken from the
ground to the upper most portion of the tree.
- The third measurement is the
Average Canopy Spread or Drip Line Diameter.
- The Drip Line is an
imaginary vertical line running from the outermost
branches or tree crown to the ground. Average canopy
spread is determined by taking the longest and shortest
diameters of limb spread or drip line and dividing by
two.
- The number of points
received for each inch or foot measured is shown in
Table 2.
|
Table 2.
Points received for inch measured |
|
Measurements |
Number of Points |
| DBH
(Diameter at Breast Height) |
One
point per inch |
| Height
of tree |
One
point per foot |
| Average
canopy spread |
One
point per each four feet |
If a tree species meets or
exceeds the point total listed above, then the Condition
Classification needs to be determined. The Condition
Classification is a rating of a plant based on its current
structural integrity and state of health as defined by the
“Guide for Plant Appraisal” published by the International
Society of Arboriculture. A rating of 70 percent or greater is
required for a tree to actually attain Grand Tree status.
How do I know
if I have a Grand Tree?
If you think your tree
might be a Grand Tree, Resource Protection staff can be
contacted at 861-5000 for consultation. If a tree has the
potential to be Grand based on a brief description staff will
perform a site inspection to take measurements and confirm the
tree’s status.
If I have a
Grand Tree, do I need a permit to remove it
Yes, a Tree Permit is
required for the removal of any Grand Tree. Information on
applying for a Tree Permit along with office locations and
telephone numbers are listed at the end of this brochure.
All subdivision plans, site and development plans, building
plans and rezone and special exception petitions shall be
designed to protect Grand Trees. Exceptions may only be made for
safety reasons or if the applicant can clearly show that setting
aside the space necessary to preserve a Grand Tree would
completely prevent the development of a lot or parcel.
If I will be
performing activities of potential disturbance and/or
development where Grand Trees exist, what protection standards
shall be adhered to?
During development,
including single and multi-family lots, and/or when performing
actions of potential disturbance where Grand Trees are present,
activities that may cause disturbance or injury to the tree
should not occur within 1 1/2 times the drip line area of the
Grand Tree (such as cut and fill activities, building pad
placements, road bed construction, construction material
storage, driving or parking of equipment, trenching, etc.).
Are barricades
required when working around Grand Trees?
Yes, tree protection
barricades are required if activities of disturbance or
development will occur where Grand Trees are present. Tree
barricades shall remain in place and intact until the work is
completed. The following are the minimum requirements for
protective barriers:
- Protective barricades
shall be placed at 1 1/2 times the drip line for each
Grand Tree, except when a plan has been approved by
Resource Protection staff to place the barricades closer
to the trunk.
- Barricades shall be a
minimum of 2 x 4 inches or larger wooden post and shall
be connected with a minimum of at least a 1 x 4 inch
wooden board and shall be clearly flagged. Other similar
methods such as construction fencing may be permitted if
approved in writing by staff in advance of installation.
Posts shall be implanted deep enough into the ground to
be stable and extend a minimum height of 3 feet above
the ground. A sign shall be installed at the edge of
each grand tree Barricade stating, ”No activities are
allowed within barricaded area, unless approved by the
County.” The text on the sign needs to be written in
English and Spanish.
Information for
Typical Site Plan/Tree Survey
The site plan shall
include all information as required by the tree protection
program, Sarasota County Code, section 54-586(b)(1).
If activities
within the drip line area or pruning must be performed on a
Grand Tree, what arboriculture practices must be observed?
When activities must
affect a Grand Tree within the drip line or when pruning must be
performed on the crown of a Grand Tree, the following
arboricultural practices are required:
- Roots must be severed by
clean pruning cuts. Roots can be pruned by utilizing
trenching equipment that is specifically designed for this
purpose or by hand digging a trench and pruning roots with a
chain saw, pruning saw or other equipment designed for tree
pruning. Root pruning shall be to a depth of 12 inches below
existing grade or to the depth of the disturbance if greater
than 12 inches below the existing grade. When underground
utilities are to be installed through the drip line, root
pruning requirements will be waived if the lines are
installed via tunneling or directional boring as opposed to
trenching.
- All pruning of Grand Trees
shall conform to ANSI (American National Standards
Institute) A300 Standards-1995 or latest edition. A copy of
these standards is available through the Board of County
Commissioners, Board Records Office, phone 941-861-7400.
- Where development activity
is permitted within the drip line of a Grand Tree, Resource
Protection staff may require additional tree protection
provisions to be incorporated in the conditions of the
permit to assure the protection of the Grand Tree.
- Where elevation changes are
proposed within the drip line of any Grand Tree, the
applicant will be required to install retaining walls or
drain tiles unless the applicant demonstrates such
protection would be impractical. The applicant has the
choice of the type or design. These root protection measures
shall be in place prior to the deposition of fill or
excavation of soil within the drip line. Resource Protection
staff will provide written conditions for work within the
drip line of a Grand Tree after the submitted plan has been
approved.
What
information must accompany an application for a Tree Permit?
A site plan must
accompany an application for Tree Permit. Trees in the
project/work area must be illustrated on the site plan. The
degree of detail in the plan will depend on the site and type of
work/development proposed. Staff may be contacted to discuss
your particular site requirements. At a minimum, Grand Trees
shall be identified by DBH, height, the size of the drip line
(in feet) and the proposed location of tree protection
barricades.
If a Grand Tree exists on a lot
and the proposed activity will encroach into the drip line, a
plan shall be submitted by a forester, certified arborist (with
current credentials from the International Society of
Arboriculture) or a Florida licensed landscape architect
specifying the methods to be utilized to preserve the tree. This
plan shall address the protection of the root system, crown and
trunk of the tree and the means of supplying water and essential
nutrients if applicable. |