HomeMy WebLinkAbout17-TR_Tree_Arborist_Report_230124_v1.pdfWASHINGTON FORESTRY CONSULTANTS, INC.
FORESTRY AND VEGETATION MANAGEMENT SPECIALISTS W F C I
O: 360/943-1723
C: 360/561-4407
9136 Yelm Hwy SE
Olympia, WA 98513
URBAN/RURAL FORESTRY • TREE APPRAISAL • TREE RISK ASSESSMENT
RIGHT-OF-WAYS • VEGETATION MANAGEMENT • FOREST/TREE MGT. PLANS • EXPERT TESTIMONY
Member of International Society of Arboriculture and Society of American Foresters
-Preliminary Tree Protection Plan-
HARMONY RIDGE PLAT
15509 116th Avenue SE
Renton, WA 98058
Prepared for: Barghausen Consulting Engineers, Inc.
Prepared by: Washington Forestry Consultants, Inc.
Date of Report: January 24, 2023
Introduction
The project proponent is planning to construct a new 21-lot plat on 6.27 acres at 15509 116th
Avenue SE in Renton. The proponent has retained WFCI to:
•Evaluate and inventory all trees on the site pursuant to the requirements of the City of
Renton Tree Protection Ordinance.
•Make recommendations for retention of significant trees, along with required protection
and cultural measures.
Observations
Methodology
WFCI has evaluated all trees 6 inches diameter at breast height (DBH) and larger in the forested
area of the site using standard forestry sampling methodology. Seven variable area plots were
installed on a systematic grid across the forested portion of the site. The plot locations are marked
in the field with pink and black stripped flagging. Data from the counts of significant trees were
entered into SuperAce®, a forest inventory software program that projected the total number of
significant trees on the site. This plot data will be used to determine the tree retention requirement.
Sampling was designed to achieve a 95% confidence level for the projection of the population of
significant trees. A 100% inventory was conducted in the non-forested area of the site.
Harmony Ridge Plat – Preliminary Tree Protection Plan
Washington Forestry Consultants, Inc. Page 2
To be a significant tree, it must have a condition rating of Fair or better. Trees rated as Poor, Very
Poor, or Dead or are defective, diseased and/or in decline and are not long-term trees and are not
considered to be significant trees.
The tree evaluation phase used methodology developed by Nelda Matheny and Dr. James Clark
in their 1998 publication Trees and Development: A Technical Guide to Preservation of Trees
during Land Development.
Site Description
The 6.27-acre parcel has three church buildings, a playground and parking lot currently occupying
the northern portion of the parcel. The site is mostly forested with the buildings in the northern
part of the parcel. The topography is mostly flat to gently rolling with a westerly aspect. The
project is bordered by a forested lot to the north, 116th Avenue SE to the east, and single-family
homes to the south and west.
Soils Description
According to the USDA Natural Resource Conservation Service soil survey there are two soil
types in the project area.
The first type is the Alderwood gravelly sandy loam, a moderately deep, moderately well drained
soil found on glacial till plains. It is formed in ablation till overlying basal till. A weakly cemented
hardpan is at a depth of 20 to 40 inches. Permeability is moderately rapid above the hardpan and
very slow in the pan. Available water capacity is low. The effective rooting depth for trees is 20-
40 inches. A perched seasonal high-water table is at a depth of 18-36 inches from November to
March. The potential for windthrow of trees is moderate under normal conditions. New trees
require irrigation for establishment. In areas where grading brings the Alderwood hardpan
nearer to the surface, the hardpan must be fractured under new trees to provide soil volume
for root development and to improve drainage around the tree.
The second is the Arents-Alderwood material, a moderately deep, moderately well drained soil
found on glacial till plains. It is formed in ablation till overlying basal till. A weakly cemented
hardpan is at a depth of 20 to 40 inches. Permeability is moderately rapid above the hardpan and
very slow in the pan. Available water capacity is very low. The effective rooting depth for trees
is 20-40 inches. The potential for windthrow of trees is moderate under normal conditions. New
trees require irrigation for establishment. In areas where grading brings the hardpan nearer
to the surface, the hardpan must be fractured under new trees to provide soil volume for
root development and to improve drainage around the tree.
Harmony Ridge Plat – Preliminary Tree Protection Plan
Washington Forestry Consultants, Inc. Page 3
Figure 1. Harmony Ridge Plat Soils Map
AgC – Alderwood gravelly sandy loam
AmC – Arents-Alderwood material
Existing Tree Conditions
There are two forest cover type for the purpose of description. The aerial photo of the parcel is
shown in Appendix I.
Type I. -- This cover type is the developed portion of the parcel. There are a total of 13 trees in
the type. The size of significant trees ranges from 8 inches to 24 inches in diameter at breast height
(DBH). Tree species include bigleaf maple (Acer macrophyllum), Callery pear (Pyrus calleryana),
Colorado blue spruce (Picea pungens), flowering dogwood (Corus florida), honey locust
(Gleditsia triacanthos), Raywood ash (Fraxinus oxycarpa ‘Raywood’), western hemlock (Tsuga
heterophylla), and western redcedar (Thuja plicata).
Tree conditions on the site range from ‘Dead’ to ‘Good,’ with most trees (92%) described as being
in ‘Fair’ or better condition. Most of the trees were planted in the landscape and will make quality
save trees.
Harmony Ridge Plat – Preliminary Tree Protection Plan
Washington Forestry Consultants, Inc. Page 4
Table 1. Summary of trees in Type I of Harmony Ridge Plat.
Species
DBH
Range
(in.)
Condition
Range
Total #
of Trees
# of
Healthy
Trees
# of
Unhealthy
Trees*
Species
Composition
of the Stand
Bigleaf
Maple 8 – 24 Fair – Good 5 5 0 38%
Callery Pear 11 Fair 1 1 0 8%
Colorado
Blue Spruce 12 Fair 1 1 0 8%
Flowering
Dogwood 20 Fair 1 1 0 8%
Honey
Locust 8 – 10 Fair 2 2 0 15%
Raywood
Ash 14 Fair 1 1 0 8%
Western
Hemlock 10 Dead 1 0 1 8%
Western
Redcedar 20 Fair 1 1 0 8%
Sum 8 – 24 Dead – Good 13 12 1 100%
*Trees rated as dead, very poor, or poor.
In summary, 12 of the 13 significant trees could be potentially retained on this site when only tree
health is considered.
The understory vegetation throughout the type is plants in the landscaping, grass, and weeds.
Harmony Ridge Plat – Preliminary Tree Protection Plan
Washington Forestry Consultants, Inc. Page 5
Photo 1: View of Cover Type I of the project area.
Type II. -- This cover type is the forested portion of the site. There are a total of 391 trees in the
type. The size of significant trees ranges from 6 inches to 36 inches in diameter at breast height
(DBH). Tree species include bigleaf maple, Douglas-fir (Pseudotsuga menziesii), bird cherry
(Prunus avium), red alder (Alnus rubra), and black cottonwood (Populus trichocarpa).
Tree conditions on the site range from ‘Dead’ to ‘Good,’ with most trees (93%) described as being
in ‘Fair’ or better condition. The trees were naturally seeded or are stump sprouts from the last
harvest. The larger trees in the site will not make quality save trees and only smaller diameter
trees have potential to be retained.
Table 2. Summary of trees in Type II of Harmony Ridge Plat.
Species
DBH
Range
(in.)
Condition Range
Total #
of Trees
# of
Healthy
Trees
# of
Unhealthy
Trees*
Species
Composition
of the Stand
Bigleaf
Maple 6 – 45 Dead – Good 296 284 12 76%
Black
Cottonwood 6 – 44 Poor – Fair 44 34 10 11%
Bird Cherry 6 – 16 Very Poor – Fair 15 12 3 4%
Douglas-fir 7 – 36 Fair – Good 22 22 0 6%
Harmony Ridge Plat – Preliminary Tree Protection Plan
Washington Forestry Consultants, Inc. Page 6
Species
DBH
Range
(in.)
Condition Range
Total #
of Trees
# of
Healthy
Trees
# of
Unhealthy
Trees*
Species
Composition
of the Stand
Red Alder 6 – 18 Dead – Fair 14 11 3 3%
Sum 6 – 45 Dead – Good 391 363 28 100%
*Trees rated as dead, very poor, or poor.
The understory vegetation in the type is Indian plum (Oemleria cerasiformis), sword fern
(Polystichum munitum), Oregon grape (Mahonia nervosa), holly (Ilex aquifolium), English ivy
(Hedera helix), Himalayan blackberry (Rubus armeniacus), and yellow archangel (Lamium
galeobdolon).
Photo 2: View of Cover Type II of the project area.
Off-site Impacts
No offsite trees will be impacted by this project. Tree retention areas are located around the
perimeter of the site near all offsite trees.
Harmony Ridge Plat – Preliminary Tree Protection Plan
Washington Forestry Consultants, Inc. Page 7
Discussion
Potential for Tree Retention
There are five areas identified for tree retention on the site plan. Three designated tree tracts, the
existing church lot, and one landscape area along the southern property line.
The new lot around the existing church building has 12 healthy trees that could be retained. Two
trees will be removed to construct the frontage sidewalk, leaving 10 trees being retained.
Tree Tract B is a designated tree tract in the SW corner of the site. There are 44 trees located in
the tract with 39 being healthy. Ten trees in the tract will be removed because of poor health or
impacts from grading. Thirty-four trees are planned to be retained in this tract.
Tree Tract C is located along the northern property line. Fifteen trees are in this tract. One tree in
poor condition and two trees impacted by grading will be removed, leaving 12 trees being saved.
Tree Tract D is a lawn area of the church with no trees. It should be planted with replacement
trees.
The landscape setback area along the southern property line contains nineteen trees. Fifteen of the
trees are healthy. Twelve trees will be removed from the tract because of poor tree health and
grading, leaving 7 healthy trees. This includes removing 4 healthy black cottonwood, a species
that is not recommended to be retained around targets due to its weak wood structure and
susceptibility to decay.
Tree Density Calculations
Title 4-4-130H of the Renton Municipal Code (RMC) requires 30% of the significant trees on the
site to be retained. There are a total of 404 significant sized trees on the parcel. After allowed tree
deductions 308 trees remain for calculating the 30% requirement. A total of 92 significant trees
will need to be retained in the project area to meet the requirement.
Total # of Significant Trees: 404 Trees
# of High Risk Significant Trees: 29 Trees
# of Trees in the Public Rights-of-Ways: 67 Trees
# of Significant Trees After Deductions: 308 Trees
# of Significant Trees Required to be Saved: 92 Trees
# of Significant Trees Planned to be Saved 63 Trees
Shortfall of Significant Tree Requirement 29 Trees
Additionally, RMC requires a minimum tree credit density of 30 tree credits per acre of net
developable acreage. The following is a summary of the projected tree density requirements:
Gross Site Acreage: 6.27 Acres
Harmony Ridge Plat – Preliminary Tree Protection Plan
Washington Forestry Consultants, Inc. Page 8
Designated Public Rights-of-way: 1.21 Acres
Net Developable Acres: 5.06 Acres
Required Tree Credit Density
(5.06 Acres x 30 Credits/Acre): 152.0 Tree Credits
Proposed Tree Retention:
Developed Areas (63 trees) 374.0 Tree Credits
Excess of Tree Credit Requirement: 222.0 Tree Credits
By retaining 63 of the significant trees on the site, this plan fall short of the minimum significant
tree retention requirement by 29 trees. Required tree credit retention exceeds the minimum tree
credits by 222.0 credits. Additional trees will be required to be replanted to replace the 30%
minimum shortfall. When the required number of protected trees cannot be retained, replacement
trees, with at least a two-inch (2") caliper deciduous or an evergreen at least six feet (6') tall, shall
be planted based on the tree credit value of each protected tree removed. A fee in lieu of tree
planting, the cost of which can be determined by the City of Renton can also substitute for tree
replacement if replanting on-site is not feasible.
The topography of the site requires significant grading to complete the project. This site work
limits the number of trees that can be retained in the interior area of the project. All trees being
retained are located in Tier 1 tree tracts, as described by RMC tree preservation priority within
subdivisions. The retained significant trees form a continuous canopy in the designated tracts.
Recommendations
Tree Protection Measures
Off-site edge trees must be protected during construction by a temporary chain-link fence
(Attachment 7), located at the property line. Placards shall be placed on the fencing every 50 feet
indicating the words, "NO TRESPASSING - Protected Trees". The individual tree RPZ is the
dripline (6 feet minimum), unless otherwise delineated by WFCI in the field and described in the
attached tree list (Table 2). If approved, the silt-fence could double as the tree protection fence for
select off-site trees.
Tree protection fences should be placed around the edge of the root protection zone (RPZ). The
fence should be erected after logging but prior to the start of clearing. The fences should be
maintained until the start of the landscape installation.
There should be no equipment activity (including rototilling) within the root protection zone. No
irrigation lines, trenches, or other utilities should be installed within the RPZ. Cuts or fills should
impact no more than 20% of a tree’s root system. If topsoil is added to the root zone of a protected
tree, the depth should not exceed 2 inches of a sandy loam or loamy fine sand topsoil and should
not cover more than 20% of the root system.
Harmony Ridge Plat – Preliminary Tree Protection Plan
Washington Forestry Consultants, Inc. Page 9
If roots are encountered outside the RPZ during construction, they should be cut cleanly with a
saw and covered immediately with moist soil. Noxious vegetation within the root protection zone
should be removed by hand. If a proposed save tree must be impacted by grading or fills more
than allowed for by WFCI in the tree list, then the tree should be re-evaluated by WFCI to
determine if the tree can be saved with mitigating measures, or if the tree should be removed.
Pruning and Thinning
Pruning should be done to coincide with land clearing, to facilitate clean-up and while access to
the trees is available (before houses are constructed).
All individual trees to be saved near or within developed areas should have their crowns raised to
provide a minimum of 8 feet of ground clearance over sidewalks and landscape areas, 15 feet over
parking lots or streets, and at least 10 feet of building clearance. Care will need to be taken to
avoid trespass when pruning offsite trees. This is best achieved by getting cooperation and
permission from the tree owner. If no permission is obtained, then legally one cannot prune
beyond the property line – ground to sky.
All pruning should be done according to the ANSI A300 standards for proper pruning, and be
completed by an International Society of Arboriculture Certified Arborist®, or be supervised by a
Certified Arborist®.
Conclusions and Timeline for Activity
1. Sixty-three significant trees equaling 374.0 tree credits are proposed to be retained on the site.
2. The final, approved tree protection plan map should be included in the construction drawings
for bid and construction of the project and should be labeled as such.
3. Stake and heavily flag the clearing limits.
4. Contact WFCI to attend pre-job conference and discuss tree protection issues with contractors.
WFCI can verify all trees to be saved and/or removed are adequately marked.
5. Conduct logging. Complete necessary hazard tree removals and invasive plant removals from
the tree protection areas. No equipment should enter the tree protection areas during logging.
6. Before land clearing is complete, do all necessary pruning on save trees and off-site trees to
provided new home clearances.
7. Contact WFCI to inspect the tree tracts after logging, but prior to land clearing to identify any
additional hazard trees that should be removed.
8. Install tree protection fences along the 'limits of construction'. The fences should be located at
the limits of construction or at the dripline of the save tree or as otherwise specified by WFCI.
Maintain fences throughout construction.
9. Complete clearing of the project.
10. Do not excavate stumps within 10’ of trees to be saved. These should be individually
evaluated by WFCI to determine the method of removal.
11. Complete grading and construction of the project.
12. Contact WFCI to final inspect the tree protection areas after grading.
Harmony Ridge Plat – Preliminary Tree Protection Plan
Washington Forestry Consultants, Inc. Page 10
13. All save trees within reach of targets should be inspected annually for 2 years by a qualified
professional forester retained by the homeowner’s association, and bi-annually thereafter. The
purpose of these inspections is to identify trees that develop problems due to changing micro-
site conditions and to prescribe cultural care or removal.
Summary
The City of Renton Municipal Code calls for 92 of the healthy, significant trees and 152.0 tree
credits be retained on the site. Based on the current site plan, 63 existing trees equaling 374.0 tree
credits will be retained. An additional 29 trees will be required to replace the 30% significant tree
requirement shortfall.
Please give us a call if you have any questions.
Respectfully submitted,
Washington Forestry Consultants, Inc.
Galen M. Wright, ACF, ASCA Joshua Sharpes
ISA Bd. Certified Master Arborist PN-129BU Professional Forester
Certified Forester No. 44 ISA Certified Arborist®,
ISA Tree Risk Assessor Qualified Municipal Specialist, PN- 5939AM
ASCA Tree and Plant Appraisal Qualified ISA Tree Risk Assessor Qualified
attachments: 1: aerial photo of project area
2: site plan with tree tracts
3: tree list
4: individual tree rating key
5: description of tree evaluation methodology
6: glossary of terms
7: tree protection fence detail
8: assumptions and limiting conditions
Harmony Ridge Plat – Preliminary Tree Protection Plan
Washington Forestry Consultants, Inc. Page 11
Attachment 1. Aerial Photo of Harmony Ridge Plat Project
(2018 King County iMap)
Project Area Boundary
Forest Cover Type Boundary
Type I
Type II
Harmony Ridge Plat – Preliminary Tree Protection Plan
Washington Forestry Consultants, Inc. Page 12
Attachment 2. Harmony Ridge Plat Site Plan
Project Area Boundary
Tree Protection Fence Locations
Harmony Ridge Plat – Preliminary Tree Protection Plan
Washington Forestry Consultants, Inc. Page 13
Attachment 3. List of Trees in Tree Tracts on the Harmony Ridge Plat Project
Tree # Species DBH
(in.) Condition Dripline
(feet)
Save
Based on
Condition
Alone?
Yes or No
Minimum
Root
Protection
Zone
(feet)
Project
Plan.
Save or
Remove
Tree
Credits Comment Tree
Location
550635 Bigleaf
Maple 10,11 Fair 28 Yes 11 Remove Church
550639 Bigleaf
Maple 24 Good 30 Yes 18 Save 9 Church
550644 Western
Redcedar 20 Fair 10 Yes 15 Remove 20 stems Church
551010 Raywood
Ash 14 Fair 21 Yes 11 Save 6 Church
551275 Honey
Locust 10 Fair 19 Yes 8 Save 5 Church
551276 Honey
Locust 8 Fair 25 Yes 6 Save 4 Church
551326 Colorado
Blue Spruce 12 Fair 10 Yes 9 Save 6 Church
551397 Dogwood 20 Fair 15 Yes 15 Save 8 Church
551474 Douglas-fir 26 Good 25 Yes 20 Remove Tract C
551475 Colorado
Blue Spruce 7 Fair 8 Yes 6 Save 4 Tract C
551476 Western
Redcedar 13 Fair 13 Yes 10 Save 6 Tract C
551480 Bigleaf
Maple 13 Poor 26 No Remove previous
top failure Tract C
551481 Bigleaf
Maple 11 Fair 20 Yes 8 Save 5 Tract C
551482 Bigleaf
Maple 8,8 Fair 18 Yes 8 Save 5 Tract C
551484 Bigleaf
Maple 12 Fair 18 Yes 9 Save 6 Tract C
551488 Douglas-fir 35 Good 22 Yes 26 Remove Tract C
551526 Bigleaf
Maple 9 Fair 18 Yes 7 Save 4 Tract C
551586 Bigleaf
Maple 23 Fair 25 Yes 17 Save 9 Church
551587 Bigleaf
Maple 10 Fair 20 Yes 8 Save 5 Church
551603 Callery
Pear 11 Fair 21 Yes 8 Save 5 Church
Harmony Ridge Plat – Preliminary Tree Protection Plan
Washington Forestry Consultants, Inc. Page 14
Tree # Species DBH
(in.) Condition Dripline
(feet)
Save
Based on
Condition
Alone?
Yes or No
Minimum
Root
Protection
Zone
(feet)
Project
Plan.
Save or
Remove
Tree
Credits Comment Tree
Location
551694 Incense
Cedar 7,12,12 Fair 12 Yes 14 Save 7 Church
551696 Colorado
Blue Spruce 7 Fair 10 Yes 6 Save 4 Tract C
551751 Bigleaf
Maple 7 Fair 23 Yes 6 Save 4 Tract C
551752 Bigleaf
Maple 18 Fair 22 Yes 14 Save 7 Tract C
551753 Bigleaf
Maple 8 Fair 17 Yes 6 Save 4 Tract C
551792 Bigleaf
Maple 8 Fair 15 Yes 6 Save 4 Tract C
551794 Bigleaf
Maple 10 Fair 18 Yes 8 Save 5 Tract C
551888 Douglas-fir 38 Fair 25 Yes 29 Remove Tract B
551895 Bigleaf
Maple 13 Fair 11 Yes 10 Save 6 Tract B
551898 Red Alder 10,10 Dead 0 No Remove Tract B
551899 Douglas-fir 9 Fair 12 Yes 7 Save 4 Tract B
551904 Bigleaf
Maple 18 Fair 25 Yes 14 Save 7 Tract B
552049 Douglas-fir 36 Fair 28 Yes 27 Save 12 Tract B
552050 Bigleaf
Maple 10,20 Fair 26 Yes 17 Save 9 Tract B
552051 Red Alder 10 Fair 25 Yes 8 Save 5 leaning Tract B
552052 Bigleaf
Maple 10 Fair 15 Yes 8 Save 5 Tract B
552053 Bigleaf
Maple 25 Fair 25 Yes 19 Save 10 Tract B
552054 Douglas-fir 14 Fair 8 Yes 11 Save 6 Tract B
552055 Douglas-fir 12 Fair 10 Yes 9 Save 6 Tract B
552056 Douglas-fir 7 Fair 8 Yes 6 Save 4 Tract B
552057 Bigleaf
Maple 10 Very Poor 0 No Remove
no top,
broken
out
Tract B
Harmony Ridge Plat – Preliminary Tree Protection Plan
Washington Forestry Consultants, Inc. Page 15
Tree # Species DBH
(in.) Condition Dripline
(feet)
Save
Based on
Condition
Alone?
Yes or No
Minimum
Root
Protection
Zone
(feet)
Project
Plan.
Save or
Remove
Tree
Credits Comment Tree
Location
552058 Douglas-fir 14,24 Fair 25 Yes 21 Save 10 Tract B
552059 Douglas-fir 24 Fair 22 Yes 18 Save 9 Tract B
552060 Douglas-fir 10 Fair 12 Yes 8 Save 5 Tract B
552061 Bigleaf
Maple 8 Fair 15 Yes 6 Save 4 Tract B
552062 Bigleaf
Maple 32 Fair 30 Yes 24 Save 11 5 stems Tract B
552063 Bigleaf
Maple 14 Fair 20 Yes 11 Save 6 Tract B
552064 Bigleaf
Maple 8 Very Poor 0 No Remove no top,
cut off Tract B
552065 Bigleaf
Maple 8 Fair 15 Yes 6 Save 4 Tract B
552066 Bigleaf
Maple 15 Fair 20 Yes 11 Save 6 Tract B
552067 Bigleaf
Maple 13 Fair 20 Yes 10 Save 6 Tract B
552068 Bigleaf
Maple 14 Fair 20 Yes 11 Save 6 Tract B
552069 Bigleaf
Maple 10,12 Fair 22 Yes 12 Save 6 Tract B
552070 Bigleaf
Maple 10 Fair 16 Yes 8 Save 5 Tract B
552071 Bigleaf
Maple 8 Fair 15 Yes 6 Save 4 Tract B
552073 Bigleaf
Maple 7 Fair 10 Yes 6 Remove Tract B
552076 Bigleaf
Maple 28 Fair 24 Yes 21 Remove Tract B
552077 Bigleaf
Maple 15 Fair 22 Yes 11 Save 6 Tract B
552078 Bigleaf
Maple 8 Dead 0 No Remove Tract B
552079 Bigleaf
Maple 14 Fair 22 Yes 11 Save 6 Tract B
552080 Bigleaf
Maple 14 Fair 22 Yes 11 Save 6 Tract B
552081 Bigleaf
Maple 15 Fair 22 Yes 11 Save 6 Tract B
Harmony Ridge Plat – Preliminary Tree Protection Plan
Washington Forestry Consultants, Inc. Page 16
Tree # Species DBH
(in.) Condition Dripline
(feet)
Save
Based on
Condition
Alone?
Yes or No
Minimum
Root
Protection
Zone
(feet)
Project
Plan.
Save or
Remove
Tree
Credits Comment Tree
Location
552082 Bigleaf
Maple 6 Fair 18 Yes 6 Save 4 Tract B
552083 Bigleaf
Maple 6,6 Poor 18 No Remove previous
top failure Tract B
552088 Bigleaf
Maple 7 Fair 10 Yes 6 Save 4 Tract B
552089 Bigleaf
Maple 8 Fair 10 Yes 6 Remove Tract B
552090 Bigleaf
Maple 8 Fair 10 Yes 6 Remove Tract B
552091 Bigleaf
Maple 9 Fair 10 Yes 7 Save 4 Tract B
552092 Bigleaf
Maple 16 Fair 15 Yes Save 7 Tract B
552093 Bird Cherry 9 Fair 12 Yes 7 Save 4 Tract B
552095 Bigleaf
Maple 26 Fair 28 Yes 20 Save 10 Tract B
552242 Bird Cherry 9 Poor 15 No Remove heavy ivy South
Line
552247 Bird Cherry 7 Fair 20 Yes 6 Save 4 South
Line
552248 Bird Cherry 6 Fair 10 Yes 6 Save 4 South
Line
552249 Bird Cherry 6 Fair 15 Yes 6 Save 4 South
Line
552250 Douglas-fir 24 Good 22 Yes 18 Save 9 South
Line
552334 Douglas-fir 20 Good 20 Yes 15 Save 8 South
Line
552340 Douglas-fir 14 Good 13 Yes 11 Remove South
Line
552341 Douglas-fir 12 Good 12 Yes 9 Remove South
Line
552342 Douglas-fir 13 Good 9 Yes 10 Remove South
Line
552363 Douglas-fir 11 Good 11 Yes 8 Remove South
Line
552397 Black
Cottonwood 25 Fair 30 Yes 19 Remove South
Line
552400 Black
Cottonwood 28 Fair 30 Yes 21 Remove South
Line
Harmony Ridge Plat – Preliminary Tree Protection Plan
Washington Forestry Consultants, Inc. Page 17
Tree # Species DBH
(in.) Condition Dripline
(feet)
Save
Based on
Condition
Alone?
Yes or No
Minimum
Root
Protection
Zone
(feet)
Project
Plan.
Save or
Remove
Tree
Credits Comment Tree
Location
552403 Flowering
Plum 8 Fair 6 Yes 6 Save 4 South
Line
552446 Flowering
Plum 6 Very Poor 6 No Remove South
Line
552447 Black
Cottonwood 32 Poor 20 No Remove
poor co-
dominant
stems
South
Line
552448 Black
Cottonwood 10 Poor 20 No Remove
leaning
over
house
South
Line
552451 Black
Cottonwood 23 Fair 18 Yes 17 Remove South
Line
552491 Black
Cottonwood 26 Fair 15 Yes 20 Remove South
Line
552492 Flowering
Plum 15 Fair 15 Yes 11 Save 6 South
Line
Harmony Ridge Plat – Preliminary Tree Protection Plan
Washington Forestry Consultants, Inc. Page 18
Attachment 4. Individual Tree Rating Key for Tree Condition
RATING SYMBOL DEFINITION
Very Good VG • Balanced crown that is characteristic of the species
• Normal lateral and terminal branch growth rates for the species and
soil type
• Stem sound, normal bark vigor
• No root problems
• No insect or disease problems
• Long-term, attractive tree
Good G • Crown lacking symmetry but nearly balanced
• Normal lateral and terminal branch growth rates for the species and
soil type
• Minor twig dieback O.K.
• Stem sound, normal bark vigor
• No root problems
• No or minor insect or disease problems – insignificant
• Long-term tree
Fair F • Crown lacking symmetry due to branch loss
• Slow lateral and terminal branch growth rates for the species and
soil type
• Minor and major twig dieback – starting to decline
• Stem partly unsound, slow diameter growth and low bark vigor
• Minor root problems
• Minor insect or disease problems
• Short-term tree 10-30 years
RATING SYMBOL DEFINITION
Poor P • Major branch loss – unsymmetrical crown
• Greatly reduced growth
• Several structurally import dead or branch scaffold branches
• Stem has bark loss and significant decay with poor bark vigor
• Root damage
• Insect or disease problems – remedy required
• Short-term tree 1-10 years
Very Poor VP • Lacking adequate live crown for survival and growth
• Severe decline
• Minor and major twig dieback
• Stem unsound, bark sloughing, previous stem or large branch
failures, very poor bark vigor
• Severe root problems or disease
• No or minor insect or disease problems
• Mortality expected within the next few years
Dead DEAD • Dead
Harmony Ridge Plat – Preliminary Tree Protection Plan
Washington Forestry Consultants, Inc. Page 19
Cultural Care Needs:
ABBRV. ACTIVITY DESCRIPTION
CC Crown
Cleaning
Pruning of dead, dying, diseased, damaged, or defective branches over 1/2 inch in
diameter –includes removal of dead tops
CT Crown
Thinning
Pruning of branches described in crown cleaning, plus thinning of up to 20% of the
live branches over ½ inch diameter. Branch should be 1/3 to ½ the diameter of the
lateral branch. Thinning should be well distributed throughout crown of tree, and
should release healthy, long-term branches.
RC Crown
Reduction
Reduction of the crown of a tree by pruning to lateral branches. Generally used to
remove declining branches or to lighten end weight on long branches.
CR Crown
Raising
Pruning of lower branches to remove deadwood or to provide ground or building
clearances.
RMV Remove Remove tree due to decline or hazardous conditions that cannot be mitigated by
pruning.
RS Remove
Sprouts
Remove basal sprouts from stem of tree.
Rep Replace Tree is small – is in decline or dead. Replace with suitable tree species.
HT Hazard Tree Tree is hazardous and cannot be mitigated by pruning. Recommendation is to remove
tree.
None No Work No work necessary at this time.
Harmony Ridge Plat – Preliminary Tree Protection Plan
Washington Forestry Consultants, Inc. Page 20
Attachment 5. Description of Tree Evaluation Methodology
The evaluation of the tree condition on this site included the visual assessment of:
1. Live-crown ratio,
2. Lateral and terminal branch growth rates,
3. Presence of dieback in minor and major scaffold branches and twigs,
4. Foliage color,
5. Stem soundness and other structural defects,
6. Visual root collar examination,
7. Presence of insect or disease problems.
8. Windfirmness if tree removal will expose this tree to failure.
In cases where signs of internal defect or disease were suspected, a core sample was taken to look
for stain, decay, and diameter growth rates. Also, root collars were exposed to look for the
presence of root disease.
In all cases, the overall appearance of the tree was considered relative to its ability to add value
to either an individual lot or the entire subdivision. Also, the scale of the tree and its proximity
to both proposed and existing houses was considered.
Lastly, the potential for incorporation into the project design is evaluated, as well as potential site
plan modifications that may allow otherwise removed tree(s) to be both saved and protected in the
development.
Trees that are preserved in a development must be carefully selected to make sure that they can
survive construction impacts, adapt to a new environment, and perform well in the landscape.
Healthy, vigorous trees are better able to tolerate impacts such as root injury, changes in soils
moisture regimes, and soil compaction than are low vigor trees.
Structural characteristics are also important in assessing suitability. Trees with significant decay
and other structural defects that cannot be treated are likely to fail. Such trees should not be
preserved in areas where damage to people or property could occur.
Trees that have developed in a forest stand are adapted to the close, dense conditions found in such
stands. When surrounding trees are removed during clearing and grading, the remaining trees are
exposed to extremes in wind, temperature, solar radiation, which causes sunscald, and other
influences. Young, vigorous trees with well-developed crowns are best able to adapt to these
changing site conditions.
Harmony Ridge Plat – Preliminary Tree Protection Plan
Washington Forestry Consultants, Inc. Page 21
Attachment 6. Glossary of Forestry and Arboricultural Terminology
DBH: Diameter at Breast Height (measured 4.5 ft. above the ground line on the high side of the
tree).
Live Crown Ratio: Ratio of live foliage on the stem of the tree. Example: A 100’ tall tree with
40 feet of live crown would have a 40% live crown ratio. Conifers with less than 30%
live crown ratio are generally not considered to be long-term trees in forestry.
Crown: Portion of a trees stem covered by live foliage.
Crown Position: Position of the crown with respect to other trees in the stand.
Dominant Crown Position: Receives light from above and from the sides.
Codominant Crown Position: Receives light from above and some from the sides.
Intermediate Crown Position: Receives little light from above and none from the sides. Trees
tend to be slender with poor live crown ratios.
Suppressed Crown Position: Receives no light from above and none from the sides. Trees
tend to be slender with poor live crown ratios.
Harmony Ridge Plat – Preliminary Tree Protection Plan
Washington Forestry Consultants, Inc. Page 22
Attachment 7. Tree Protection Fence Detail
6 ft. Temporary Chain Link Fence
NO TRESPASSING - Protected Trees
Harmony Ridge Plat – Preliminary Tree Protection Plan
Washington Forestry Consultants, Inc. Page 23
Attachment 8. Assumptions and Limiting Conditions
1) Any legal description provided to the Washington Forestry Consultants, Inc. is assumed to be correct. Any
titles and ownership's to any property are assumed to be good and marketable. No responsibility is assumed for
matters legal in character. Any and all property is appraised or evaluated as though free and clear, under
responsible ownership and competent management.
2) It is assumed that any property is not in violation of any applicable codes, ordinances, statutes, or other
governmental regulations, unless otherwise stated.
3) Care has been taken to obtain all information from reliable sources. All data has been verified insofar as
possible; however, Washington Forestry Consultants, Inc. can neither guarantee nor be responsible for the
accuracy of information.
4) Washington Forestry Consultants, Inc. shall not be required to give testimony or to attend court by reason of
this report unless subsequent contractual arrangements are made, including payment of an additional fee for
such services as described in the fee schedule and contract of engagement.
5) Loss or alteration of any part of this report invalidated the entire report.
6) Possession of this report or a copy thereof does not imply right of publication or use for any purpose by any
other than the person to whom it is addressed, without the prior expressed written or verbal consent of
Washington Forestry Consultants, Inc.
7) Neither all or any part of the contents of this report, nor copy thereof, shall be conveyed by anyone, including
the client, to the public through advertising, public relations, news, sales or other media, without the prior
expressed written or verbal consent of Washington Forestry Consultants, Inc. -- particularly as to value
conclusions, identity of Washington Forestry Consultants, Inc., or any reference to any professional society or
to any initialed designation conferred upon Washington Forestry Consultants, Inc. as stated in its qualifications.
8) This report and any values expressed herein represent the opinion of Washington Forestry Consultants, Inc.,
and the fee is in no way contingent upon the reporting of a specified value, a stipulated result, the occurrence
neither of a subsequent event, nor upon any finding in to reported.
9) Sketches, diagrams, graphs, and photographs in this report, being intended as visual aids, are not necessarily to
scale and should not be construed as engineering or architectural reports or surveys.
10) Unless expressed otherwise: 1) information contained in this report covers only those items that were examined
and reflects the condition of those items at the time of inspection; and 2) the inspection is limited to visual
examination of accessible items without dissection, excavation, probing, or coring. There is no warranty or
guarantee, expressed or implied, that problems or deficiencies of the tree or other plant or property in question
may not arise in the future.
Note: Even healthy trees can fail under normal or storm conditions. The only way to eliminate all risk is to remove
all trees within reach of all targets. Annual inspections by an ISA Certified Arborist or Certified Forester will reduce
the potential of tree failures. It is impossible to predict with certainty that a tree will stand or fail, or the timing of the
failure. It is considered an ‘Act of God’ when a tree fails, unless it is directly felled or pushed over by man’s actions.