HomeMy WebLinkAboutParks and Rec Advisory Board-Agenda Packets-2/6/2006 (2)
city Of
llC9
Texas
TREE BOARD AGENDA
Monday, February 6, 2006
6:00 p.m.
For the meeting conducted at the Park Annex
located at 5109 Bransford Road
AGENDA
NUMBER AGENDA ITEM
1. Call to Order
2. Approval of the November 7,2005 minutes
3. Neighborwoods Program
4. Tree City USA update
5. Citizen comments/presentations regarding items not on the agenda*
6. Other informational items
7. Adjournment
*(ThiS time is allocated for citizens to informally address the Board on matters not on the agenda that require no formal action.
Each presentation will be limited to a maximum of five (5) minutes. Board members may not respond to citizens who speak
regarding matters not on the agenda.)
I certify that the above agenda was posted on the bulletin board at City Hall on February 3, 2006. /'c.. , . :~..,..t
city Of
ilcg
Texas
p~
COLLEYVILLE TREE BOARD
MINUTES
November 7, 2005
6:00 p.m.
Monica Sue Walsh called the meeting to order at 6:03 p.m. on Monday, November
7, 2005 at the Parks and Recreation office.
ROLL CALL:
Connie Hampton, Ginny Tigue, Moira Brunken, Pete
Riis, Roger Nelson, and Councilperson Rich Hendler
STAFF:
Monica Sue Walsh, Director of Parks and Recreation
and Dixie Smith, Administrative Secretary
1. Call to Order
2. Approval of the November 1, 2004 Minutes
Pete Riis moved to approve the November 1, 2004 Colleyville Tree Board minutes.
Connie Hampton seconded the motion. The vote was unanimous.
3. Recertification for Tree City USA
Monica Sue Walsh handed out a copy of the Tree City USA application and went
over the different criteria used to qualify for the recertification. The deadline for
application is December 31, 2005.
4. Citizens Comments/Presentations Regarding Items not on the Agenda
5. Other Informational Items
6. Adjournment
Monica Walsh adjourned the meeting 6:25 p.m.
Respectfully submitted and approved:
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Dixie S. Smith, Administrative Secretary
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CITY OF COLLEYVILLE
Street Tree Inventory
and Recommendations
June 2005
TEXAS
FOREST -,- SERVICE
The Texas A&M University System
E.xecutive SUnl1naf'l1 - (-'ollel/ville Il11Jentorll
~ ~ v
In April 2005, Texas Forest Service conducted a five-percent sample of public street trees for the City of
Colleyville, Texas. During the survey, potential planting sites in the public right-of-way and on private
front yards were also recorded.
Overall, the survey found that the street tree population is estimated to contain 36% oak species (14%
post oaks) and a total of 11,900 street trees. Most trees are under 10" diameter, indicating an overall
young forest. Eighty-eight percent of the trees are in at least fair condition, with 50% listed as good or
excellent.
The value for Colleyville's public street trees is estimated to be more than $20 million based on the Tree
and Plant Appraisal Guide, 9th Edition.
An abundance of possible planting sites were identified on both public and private land. It is estimated
that there are more than 20,000 of these potential planting sites.
Recommendations include both short- and long-term options. Major recommendations include
increasing tree plantings, reducing risk by training young trees, annual inspections of all street trees and
developing an annual work plan.
Other short-term recommendations include additional staff training and ISA certification, as well as
increasing public awareness of the value of the community forest.
Long-term recommendations include a 100 percent public tree inventory in order to develop a master
plan for management of this valuable resource.
Colleyville, Texas Sample Street Tree Inventory Report
2
lntrotl'uctio
Texas Forest Service (TFS) was contacted in early 2005 by Colleyville City Councilman Rich Hendler
to review the current tree management and help the city determine priorities for future urban forestry
efforts. In April, six TFS regional urban foresters conducted a Texas Sample Community Tree Inventory
(TXSCTI) of five percent of the street blocksides in Colleyville. This was a survey of public street trees
only and not trees on private property. This report consists of two sections: The State of the Urban
Forest and Recommendations.
(~olle!IVillefTexas
Incorporated in 1956, today Colleyville has over 27,000 residents. The town is located in Northeast
Tarrant County near DFW International Airport. On average, residents of Colleyville have a higher
annual median household income and higher educational levels than Tarrant County as a whole. The city
has fixed boundaries and according to a 1994 master plan, the anticipated population at build-out may be
as much as 36,000.
Cllrrel1t Tree l\/lanagelnent In Colle,Y7)ille
Colleyville is located mostly in the Eastern Cross Timbers region, characterized by oak woodlands
composed primarily of post oak forest, with pockets of prairie. There is some neighborhood group
involvement in urban forestry issues with excellent interaction between these groups and the city.
Citizen awareness is considered high by the city with trees viewed as vital components of the
community according to an urban forestry survey.
A limited, city-wide tree management plan exists, which includes an approved species list, a tree
preservation ordinance, pre-development tree inventories, and fines and penalties for violations. A
penalty of $100 per inch of removed or damaged trees is enforced as well as an inch-for-inch
replacement of the removed trees. Program funding is considered "fair" by the city, and care consists
primarily of contracted response to emergency situations. A partial tree inventory of park trees has been
conducted, however no written tree care standards exists. No inventory of street trees has ever been
conducted, and Colleyville has no Urban Forestry Master Plan.
The Colleyville Tree Board currently interprets and enforces the tree preservation ordinance. The Parks
Department oversees the care and maintenance of city trees in parks and greenbelt areas, however they
have no line-item budget for tree care activities. Ninety-eight percent of new tree planting stock for the
parks is obtained from commercial nurseries. A contract maintenance program was drafted six years
ago for park properties to guide tree management and includes pruning and a regular watering program
for newly planted trees.
The street department, along with the code enforcement office, handles tree related issues for trees
situated adjacent to city streets or for trees illegally removed. In total, these three departments receive
less than 100 citizen calls each year concerning tree issues. A TMOS Energy is the utility company
responsible for trimming trees near overhead power lines.
Colleyville, Texas Sample Street Tree Inventory Report
3
State of tl1eUrlJal1 Forest
A five percent sample street tree inventory was conducted on April 20- 21, 2005, by a team of urban
foresters from Texas Forest Service, and serves as the benchmark in the planning process for public
trees in Colleyville. A windshield survey was taken and data recorded on a collection form, which can
be found in Appendix I. For each of the 595 trees surveyed in the five percent blockside sample, data
was collected on species, diameter, condition, and deadwood in the crown. Potential planting sites were
also listed for both public right-of-way and front yards. Definitions of these data fields are found in
Appendix II.
SIJecies
The species or type of each tree was recorded by the foresters. For a complete list of trees, see
Appendix II.
.. There are 42 species of trees.
.. Almost 15% of the forest is composed of crape myrtles and Callery Pears. While
attractive, both are non-native and provide limited environmental benefits. Research
indicates that no one tree type should make up more than 10% of the population.
.. Colleyville has an estimated 11,900 street trees.
~.
\
Top Ten Genera
of Street Trees in
Colleyville, Texas
Pines
10%
Crape Myrtle /
. 9% /
"" /
~.~
From 5% Blocksl de Sample
Colleyville, Texas Sample Street Tree Inventory Report
4
Figure 1
Street Tree Types by Percentage in Colleyville, Texas
?~,
\, N1~
l' 1Kli!R!lI~\5'
~l~
'J oc::~
:} l)~;o
r') i)!~;'(J.
41)"0
2 (!~';1
'~; :)f"b
~~~,~~~~~~~~~~~,~~~~~
.., 0 ~,. ~ ~.I.. :i'/~ O~ (;~~ ~~ ~,. J.. -16,.., ~?- , 0"... b'~l $,.c(; W" ~ b ".f< '$,,, Q' ">1,. ~." ~
~.f ..~ "TJo: 10)., * "0' If... '0) '/ ..0 b ".f ....00 r.) b:;O ...~ 0 ...'" ",fA b
~/(l ~">1 0... '''~t' 0 ('''~I': ~qc, '.;.,. O~ Q' is,(l O<),f ('(;., "" --o,,?- is,,
~.. ").. ~,.
:'.:) t'\.j'::,~J~: :~J-~'iL"~' .:\~~
Figure :z
... The top 20 species are evenly divided between planted and native trees. Over time the
planted trees will replace most of the native forest trees.
.... 730/0 of all trees are in the top ten species (post oak 140/0, cedar elm 11 %, crape myrtle
10%, American elm 8%, live oak 7%, Shumard oak 5%, swamp white oak 5%,
hackberry 40k, Redcedar 4%, pear 4%)
.... The most abundant species, post oak (14%), is long-lived, slow growing and very
sensitive to root disturbance from construction.
Colleyville, Texas Sample Street Tree Inventory Report
5
I~ree S-iz
All trees were categorized by size according to "diameter class." This is a measurement of trunk
circumference 4.5 feet above the ground. Diameter classes are summarized in the chart below.
.. 750/0 of public street trees are less than ten inches in diameter.
.. Most of the street trees in Colleyville are young (small), and there are relatively few risk
management concerns from large deadwood at this time
.. Many of these young trees are in need of proper training to correct defects in their
structure. Maintenance performed while the trees are small is inexpensive, increases
the lifespan, and reduces future risk management concerns.
... A large number of the 0 - 5" trees are naturally regenerated trees along old fence lines
or in ditches. These trees generally have a lower value than planted landscape trees.
1: Dl ameter rne3surelj at
4 :, feet above 9fuund 18\'81
Diameter Size of Street Trees in Colleyville, Texas *
11-20 inches
18% \
'\ 21-30 inches
_-.J 3%
mu___\ !
I _",,___J
iiiii;==J
~'~.",
~I
31+ inches
1%
From 5% Blocks,d", SamplE- 4/05
Figure 3.
Colleyville, Texas Sample Street Tree Inventory Report
6
COlltlitio
Condition class is a general assessment of the overall health of a tree. Classes were separated into four
categories: "Excellent," "Good," "Fair" and "Poor."
.. 880/0 of the city's trees are in excellent, good or fair condition. This corresponds with
the data showing the majority of trees are young (small) and major faults have yet to
develop.
.. 13% of the trees are in poor condition or dead.
Condition Classes of Street Trees in CoUeyville. Texas
50%
45%
40%
35%
IIJ
CD
e 30%
~
'0
CD
1i. 25%
E
co
U)
'0 20%
~
0
15%
10%
5%
0%
Excellent
Good
Fair
Condition Class
Poor
Dead
Figure 4.
Colleyville, Texas Sample Street Tree Inventory Report
7
I~ree i\Janagelnent
Deadwood in trees is a risk management issue. Dead limbs three inches and larger were recorded so that
the city could determine the extent of these problems.
'. Only 7% of all trees had deadwood, reflecting the small size and young age of most
trees in Colleyville.
100%
90%
80%
70%
60%
50%
40%
30%
20%
10%
0%
Tree Value
Public Street Trees With 3" Dead Limbs in
Colleyville, Texas
"
Dead Limbs
7%
--,
Figure 5.
. The average value of a public street tree is $1,750.
. The approximate value of the public street trees in the City of Colleyville is
$20.4 million.
(From: Guide for Plant Appraisal, 9th Edition, Council of Tree and Landscape Appraisers, 2000, International Society of
Arboriculture, Champaign, IL. Trunk Formula Method and the Texas Species Approximation, 2003, Texas Chapter ofthe
International Society of Arboriculture, Elgin, Texas.)
Colleyville, Texas Sample Street Tree Inventory Report
8
Plantin<<- Sites
\...
During the sample inventory, foresters recorded potential tree planting sites. Underground utilities were
not considered as planting site criteria, therefore the actual number of sites will be lower than the sample
estimate. The following criteria were used to select a tree planting site:
PLANTING CRITERIA
Tree Size:
Only medium to large trees to be planted.
Planting Site Definition:
In public right-of-way (ROW) and/or within 30' of ROW in private front yard
Distance from objects:
Utilities - overhead (15'), Hydrants, utility poles, and light posts (10'),
Curb or Road Edge (4'), Intersections (from comers) (25'),
Driveways (5'), Other trees: 20-40'
.. There are more planting sites than existing street trees.
... There are about 20,500 tree planting sites on public right-of-way and in front yards 30
feet in from the right-of-way.
Number of Public Street Trees and Number of Planting Sites in CoIleyville, Texas
16000
14000
2000
13,500
12000
10000
8000
6000
7,000
4000
o
Number of Street Trees
Planting S~es on Public ROW
Planting Sftes on Private Front Yards
Fi e6
... There are approximately 13,500 potential tree planting sites on the public right-of-way.
.. There are approximately 7,000 potential tree planting sites on private front yards.
... If all the public tree planting spaces were f"illed with trees, there would be about 25,000
public street trees (11,900 + 13,500).
Colleyville, Texas Sample Street Tree Inventory Report
9
ReC01'111llelllta tilJl1S
The objective of the Colleyville 5% Texas Sample Community Tree Inventory (TXSCTI) was to provide
the city with an overview of their street tree resource. Presented below are the short. and long-range
recommendations provided by Texas Forest Service.
Short-ranfge reC01Ull1endations (2-3 years)
.. Planting: Increase the number of trees planted
Develop a citywide tree planting program in the range of 500 to 1,000 street trees each
year. It is recommended that the city use a NeighborWoods Program to accomplish this
planting in residential areas. With NeighborWoods, the city cooperates with businesses,
neighborhood groups and residents to plant trees that will impact public streets. There
should be no more than 10% of anyone type or species of tree. Another rule of thumb is
that the goal of total tree canopy coverage should be 40%. The city may also consider a
CommemorativelMemorial tree planting program that allows citizens to contribute funds to
public tree planting. For more about the NeighborWoods Program see
... Maintenance: Lower the risk from trees to the public
o Train young trees - Many trees in Colleyville are smaller, and work done to train these
trees now can avoid greater costs for maintenance as the trees get larger.
o Conduct an annual inspection of public trees to assess risk.
o Based on the annual inspection, develop an annual work contract to reduce risk from
blind comers (sight triangles at comers), low limbs, deadwood, removals, light/signage
blockage and downed limbs.
o All tree work should be done by Certified Arborists.
o Develop bid specifications for contract tree care. Use the latest ANSI A300
Standard Practices for Tree, Shrub and other Woody Plant Maintenance, the
ANSI Z133 Safety Standards and the latest Tree Pruning Guidelines from the
International Society of Arboriculture.
o Review the storm damage and emergency response for public trees within the current
emergency management operations protocols.
... Management and Regulation: Increase the efficiency of operations
o Develop an annual work plan and budget for public tree planting and care.
o Consider integrating planting and care into planning and development. Review ways
regulations overlap and seek to increase efficiencies.
o Training of staff on tree care and safety - Work with TFS Regional Forester to identify
training classes for city workers. Encourage several city workers to become ISA Certified
Arborists.
Colleyville, Texas Sample Street Tree Inventory Report
10
o Review utility (gas, electric, cable, telephone) franchise agreements for opportunities to
upgrade tree planting, care and protection.
o Interlocal Contract Forester - Review the feasibility of joining with adjacent
communities to contract the services of a forester/arborist to supply the city with part-
time urban forestry technical expertise.
~ Community Support: Get the public involved
o Involvement - Work to make sure citizen tree interests are represented to the City
Council by designating members of existing boards or forming a new Tree Commission
or Urban Forestry Board. Invite Scouts, civic groups, neighborhood groups and others to
continue to participate in urban forestry activities.
o Awareness - Continue with the annual Arbor Day celebration. Post these inventory
results on the city web site and as an article in the city newsletter. Continue to participate
in the National Arbor Day Foundation Tree City USA program.
o Education - Investigate developing a Big Tree and Historic/Heritage Tree registry to help
stimulate interest in the urban forest.
l.Jong-rall,ge reCOll11nelldatiol1S
... Prepare and Implement An Urban Forestry Master Plan
Conduct a comprehensive public tree inventory of all planting sites and trees on street, park and
public facilities to develop an Urban Forestry Management Plan for Colleyville.
Benefits of a comprehensive inventory:
. Provides actual location and severity of tree risk conditions.
. Provides the city with the baseline information to implement a reasonable care policy to
remove a portion of all risks over a scheduled period of time (years).
. 'Real time' data is produced in that daily reports of hazardous findings can be filed with
the proper city department to facilitate necessary action.
. If collected in a GIS, the data will provide spatial information, such as street address, to
compile a work order for pruning and other maintenance needs directly from the tree
inventory. A Geographical Information Systems-based work order system may save the
city money over a normal pruning cycle of 5-7 years.
. GIS tree information can be added to existing GIS layers of city infrastructure so that tree
information can be considered in development and construction plans.
. A 100 % sample would provide actual planting spaces information for replacement
plantings. Criteria for the exact type of tree would be catalogued according to growing
space, overhead utilities and other site characteristics.
. The inventory can be used as data for a planning document to establish budgets.
. The inventory would provide individual tree values.
Colleyville, Texas Sample Street Tree Inventory Report
11
.. Consider Conducting an Ecosystem Analysis
A complete ecosystem analysis, such as "CityGreen" would quantify the environmental benefits
of the forest cover. Values for carbon sequestration, pollution removal and stormwater
mitigation could be verified and established.
Colleyville, Texas Sample Street Tree Inventory Report
12
Appendix I
Data Collection Form
TXSCTI Colleyville, Texas
Crew:
Blockside #:
Date:
RON Width (11:):
Street:
From:
To:
Median lree Species dbh Class Condition Deadwood Report to
Tree? 11 Class ~? communitY?
.... .. ..
on N ... +
. .... . ..
.. CD :: .... ...
N
M 1 1 . . . . 0 F P D a-
M 2 1 . . . . 0 F P D a-
M 3 1 . . . . 0 F P D a-
M 4 1 . . . . 0 F P D a-
M 5 1 . . . . 0 F P D a-
M 6 1 . . . . 0 F P D a-
M 7 1 . . . . 0 F P D a-
M 8 1 . . . . G F P D a-
M 9 1 . . . . 0 F P D a-
M 10 1 . . . . 0 F P D a-
M 11 1 . . . . 0 F P D a-
M 12 1 . . . . 0 F P D a-
M 13 1 . . . . 0 F P D a-
M 14 1 . . . . G F P D a-
M 15 1 . . . . 0 F P D a-
M 16 t . . . . 0 F P D ..
M 17 1 . . . . G F P D ..
M 18 t . . . . G F P D a-
M 19 1 . . . . G F P D a-
M 20 t . . . . G F P D a-
M 21 t . . . . G F P D a-
M 22 1 . . . . G F P D a-
M 23 t . . . . G F P D a-
M 24 t . . . . G F P D ..
25
M 26 t . . . . G F P D a-
M 27 1 . . . . G F P D ..
M 28 1 . . . . G F P D ..
Special Notes: Number of PlantinQ Sites Der Block:
In Public ROW
In Private Yard (S30' ROW)
Blockside Sheet of
Colleyville, Texas Sample Street Tree Inventory Report
13
Appendix II
Colleyville Tree Inventory Data Field Definitions: TXSCTI
Blockside Number: Blockside = street name from street name to street name. 5% random sample
has been mapped with ROW width and Blockside Numbers assigned before the survey begins.
Median Tree: The survey is taken by driving up one side of the block and down the other. Circle
'M' if tree is a tree in a center median strip.
Tree #: Tree number is just to help keep track of where the surveyor is since this is a sample
inventory. Start at a block end. All trees are counted in ROW for residences, businesses, parks and
other maintained areas. Only survey trees over 5 inches in fencerows or wild areas. If you have
more than 25 trees, use a sheet with blank tree number column and fill in 29, 30, 31... and fill in
"Blocks ide Sheet _ of _" at bottom of survey sheet.
Species Code: See Appendix III.
dbh Class: 1 (0-5),2 (6-10), 3 (11-20),4 (21-30), 5 (31+). Ifforked, take diameter below fork.
Diameter measures a breast height (4.5 ft. above grade).
Condition Class
Good - No apparent signs of physical damage, decay or insect damage, or deadwood in the crown,
limbs or trunk,
Fair - Minor signs of limited insect and disease infestation, structural faults and minor deadwood
in the crown, limb or trunk,
Poor - Tree in a general state of decline, exhibiting major disease or insect damage, physical
defect, major deadwood in the crown, limbs, or trunk.
Dead - Greater than 90% of the crown contains dead wood or your judgment. (Removal)
Deadwood ~ 3 inches diameter in crown: Circle 3" if yes
Report to Community: If the tree appears to need attention make a note.
PLANTING:
Planting: Only Medium to Large Trees to be planted.
Planting Site: In Public ROWand within 30' of ROW in Private Front Yard
Utilities - underground (5'), overhead (15')
Hydrants, utility poles, and light posts (10')
Curb or Road Edge (4')
Intersections (from comers) (25')
Driveways (5')
Other trees: 20-40'
Storm sewer - No posting
Colleyville, Texas Sample Street Tree Inventory Report
14
Appendix III
Colleyville Tree Species List
Colleyville, Texas Sample Street Tree Inventory Report
15