Newcom TRA formISA. Basic Tree Risk Assessment Form
Client Newcom
Address/Tree location 19117 Olympic View Dr.
Tree species bigleaf maple (Acer macrophyllum)
Assessor(s) Katy Bigelow
Date 4-7-2021
Tree no
dbh Height
Time frame Tools
Target Assessment
Time
Sheet
Crown spread dia. _
of 1
Target zone
Occupancy
M1•
r
a
3
=
v
t
2
rate
1—rare
m
c
F
Target description
d a
E
3 x
u1
z—occasional
F W
` F
F 1Z
ai
—frequent3
u>
u
4—costant
6` E
z `L
1
Newcom home
✓
✓
✓
3
no
no
2
Newcom parking area
✓
✓
✓
3
no
no
3
Neighbors parking area
✓
✓
✓
3
no
no
4
Site Factors
History of failures - Topography Flat❑ SlopeO % Aspect
Site changes None 0 Grade change ❑ Site clearing❑ Changed soil hydrology Root cuts Describe
Soil conditions Limited volume 0 Saturated ❑ Shallow Compacted ❑ Pavement over roots ❑ % Describe
Prevailing wind direction SW Common weather Strong winds ❑ Ice ❑ Snow ❑ Heavy rain ❑ Describe
Tree Health and Species Profile
Vigor Low ❑ Normal 0 High ❑ Foliage None (seasonal) ❑ None (dead) ❑ Normal % Chlorotic % Necrotic %
Pests Abiotic
Species failure profile Branches❑ Trunk❑ Roots❑ Describe
Load Factors
Wind exposure Protected ❑ Partial0 Full ❑ Wind funneling❑
Relative crown size Small ❑ Medium ❑ Large 0
Crowndensity Sparse❑ Normal❑ Dense❑ Interior branches Few[] Normal❑ Dense❑ Vines/Mistletoe/Moss❑
Recent or planned change in load factors
Tree Defects and Conditions Affecting the Likelihood of Failure
— Crown and Branches —
Unbalanced crown ❑ LCR %
Cracks ❑ Lightning damage ❑
Dead twigs/branches ❑ %overall Max. dia.
Codominant ❑ Included bark ❑
Broken/Hangers Number Max. dia.
Weak attachments ❑ Cavity/Nest hole % circ.
Over -extended branches ❑
Previous branch failures ❑ Similar branches present ❑
Pruning history
Crown cleaned ❑ Thinned ❑ Raised ❑
Dead/Missing bark ❑ Cankers/Galls/Burls ❑ Sapwood damage/decay ❑
Reduced ❑ Topped ❑ Lion -tailed ❑
Conks ❑ Heartwood decay ❑
Flush cuts ❑ Other
Response growth
Main concern(s) See report
Load on defect N/A ❑ Minor ❑ Moderate
❑ Significant ❑
Likelihood of failure Improbable ❑ Possible ❑ Probable
❑ Imminent ❑
—Trunk —
— Roots and Root Collar —
Dead/Missing bark ❑ Abnormal bark texture/color ❑
Collar buried/Not visible ❑ Depth Stem girdling ❑
Codominant stems ❑ Included bark ❑ Cracks ❑
Dead ❑ Decay ❑ Conks/Mushrooms ❑
Sapwood damage/decay ❑ Cankers/Galls/Burls ❑ Sap ooze ❑
Ooze ❑ Cavity ❑ % circ.
Lightning damage ❑ Heartwood decay Conks/Mushrooms ❑
Cracks ❑ Cut/Damaged roots ❑ Distance from trunk
Cavity/Nest hole % circ. Depth Poor taper ❑
Root plate lifting ❑ Soil weakness ❑
Lean ° Corrected?
Response growth
Response growth
Main concern(s) See report
Main concern(s) Limited soil area
Load on defect N/A ❑ Minor ❑ Moderate ❑ Significant ❑ Load on defect N/A ❑ Minor ❑ Moderate ❑ Significant ❑
Likelihood of failure
Likelihood of failure
Improbable ❑ Possible ❑ Probable ❑ Imminent ❑'KImprobable
❑ Possible ❑ Probable ❑ Imminent ❑
Page I of 2
Risk Categorization
Likelihood
-0
E
u
a)
-0
Consequences
Failure
Impact
Failure & Impact
(from Matrix 1)
c
N
+°
Risk
rating
s
„
a
c
Conditions
L
°
°'
uLa
Tar et
g
o
a
N
o
f
2
3
m
v
v,
£
Y
Y
�,
r-
G
a)
of part
(from
c°�
Tree part
of concern
a
LL
protection
£
a
a
>
°
_
°
>
z
0
0
Matrix 2)
Structural
rot under their
OOOO
0
0
OOO
OOO,O
high
1
branches
attachments, see
report
0I0I00
00�0
00I00
0000
00000000
00
000
0000
O
00
00
000
0000
0000
O
000
2
00000
0
000
0000
0000
000
O
O
3
0000
0000
000000,00
0000010000000
0000
010100
001010
00
0
0000
000001000
000
000
4
010100
O
00
0100
000
Matrix I. Likelihood matrix.
Likelihood
of Failure
Likelihood of Impacting Target
Very low
Low
Medium
High
Imminent
Unlikely
Somewhat likely
Likely
Very likely
Probable
Unlikely
Unlikely
Somewhat likely
Likely
Possible
Unlikely
Unlikely
Unlikely
Somewhat likely
Improbable
Unlikely
Unlikely
Unlikely
Unlikely
Matrix2. Risk rating matrix.
Likelihood of
Failure & Impact
Consequences of Failure
Negligible
Minor
Significant
Severe
Very likely
Low
Moderate
High
Extreme
Likely
Low
Moderate
High
High
Somewhat likely
Low
Low
Moderate
Moderate
Unlikely
Low
Low
Low
Low
Notes, explanations, descriptions
See report
Mitigation options Create a short habitat trunk or cut to a stump. See report for details.
Overall tree risk rating
Overall residual risk
Low ❑ Moderate ❑ High 0 Extreme ❑
Low 0 Moderate ❑ High ❑ Extreme ❑
North
Residual risk low
Residual risk
Residual risk
Residual risk
Work priority 1 0 20 30 40
Recommended inspection interval none
Data M Final ❑ Preliminary Advanced assessment needed ❑No ❑Yes-Type/Reason
Inspection limitations ONone ❑Visibility ❑Access ❑Vines ❑Root collar buried Describe
This datasheet was produced by the International Society of Arboriculture (ISA) and is intended for use by Tree Risk Assessment Qualified (TRAQ) arborists — 2013
Page 2 of 2