HomeMy WebLinkAbout19 TR_Sather_Arborist_Report_20180220_v1Shoffner Consulting
21529 4TH AVE. W #C31 BOTHELL, WA 98021 MOBILE:(206)755-2871
May 30, 2017
Revised: December 13, 2017
Patter Sather
532 SW 3rd Pl.
Renton, WA
98057
RE: Tree Inventory and Retention Plan - Sather SP, Renton, WA.
Patty:
This report is provided to address the recent inventory I conducted on the
property at the address of 532 SW 3rd Pl. in the City of Renton. Please see the
accompanying Tree Inventory Map and Tree Evaluation Data spreadsheet for
reference to this report.
1. Site Conditions and Proposed Development
The property is located in Renton in an area primarily developed with single
family residences. The project site is currently developed as a nursery with
several buildings, greenhouses and a home. The site slopes downward to the
south.
The proposed development of the site is to short plat it into as many as four
single family residence lots.
2. Tree Inventory Methods and Results
I visited the site on May 22, 2017 to conduct an inventory and gather information
on all of the trees during which I labeled them with numbered metal tags which
correspond to the numbers on the inventory map and in the tree evaluation data
spreadsheet.
I conducted visual condition assessments according to the methods and
procedures specified in the ISA Tree Risk Assessment Manual (2013) by viewing
them up close to observe the trunk and root collar and from afar to observe
conditions in the crown. The tree evaluation data spreadsheet provides
information on all of the trees. In total, I conducted evaluations on 29 trees. One
tree shown on the survey has recently fallen.
The accompanying Tree Evaluation Data spreadsheet provides information on all
of the inventoried trees.
Two of the trees on the site, both western red cedars (#6 and #11) have very
sparse crowns, a condition that is indicative of decline that will ultimately end in 1
the death of these trees very soon. In my opinion, these trees should not be
retained as they will soon need to be removed.
3. Tree Retention and Replacement Required and Proposed
This property is located in a residential zone and is planned to be developed with
single family residences, therefore the City of Renton specifies tree retention at 2
trees per every 5,000 square feet of property area. The project site measures
22,920 square feet requiring the retention/replacement with 9 trees.
Trees 30” and greater are classified as landmark in the City of Renton and are
prohibited from removal without an approved Vegetation Management Plan or a
Land Development Permit. There are 2 trees on the site that meet the size
threshold to be classifed as landmark. They are trees #6 and #9. Number 6,
however, is in an advanced state of decline and not recommended to be retained
as it will need to be removed in the near future once it has died.
A total of 12 trees, including the healthy exceptional tree (#9) are proposed to be
retained satisfying the requirement for tree retention on developing lots in the
City of Renton.
For trees not retained to meet the minimum requirement, replacement trees are
to be 2 inch caliper for deciduous trees and a minimum of 6’ in height for
evergreen trees.
For trees not planted as replacement below the required minimum, section 3.H.
1.e.iii of the RMC specifies the following:
iii. Fee in Lieu: When the Administrator determines that it is infeasible to replace
trees on the site, payment into the City’s Urban Forestry Program fund may be
approved in an amount of money approximating the current market value of the
replacement trees and the labor to install them. The City shall determine the
value of replacement trees.
No tree replacement is required on this project as the required tree retention is
being provided.
4. Impact Assessment
This impact assessment is to provide information on the potential impact
removing trees will have on the retained trees.
Most of the trees to be removed are on the new lots, to the north of the existing
residence. Three trees to be removed on the existing lot are east of the trees to
be retained on that lot.
The main impact associated with the removal of trees on retained trees is the
increase in exposure of the retained trees to winds. In this area, the prevailing
winds (which create the strongest gusts) blow from the south to southwest. Since 2
all of the trees to be removed are north or east of the trees to be retained, the
removal of trees on the site will not increase the exposure of the retained trees,
therefore, they will not be impacted.
5. Tree Protection Measures
The following tree protection measures are required for all of the retained trees:
• Prior to beginning any work on the site, including clearing and grading,
protection fencing is to be installed at the required locations at or beyond
the dripline edge.
• The fencing is to be a type required or approved by the City of Renton.
• Signs calling out the area within the fencing as the Tree Protection Zone -
No Entry, No Dumping, No Storage of Materials and No Machinery, are to
be hung from the fencing around each tree.
• The fencing is to remain in place throughout construction and removed
only upon approval of the City of Renton.
Any impacts proposed within the tree protection zone is to be evaluated and
assessed for extent of impacts by the project consulting arborist.
5. Use of This Report and Limitations
This report is provided to Patty Sather as a means of reporting on the conditions
and statuses of the trees located on the short plat project site in the City of
Renton. While Shoffner Consulting has used every means available to determine
tree health and development impacts, trees are dynamic and their conditions can
change rapidly given changes in environmental factors and site development,
therefore this assessment pertains only for those noted on the day of their
evaluation, and no guarantee can be made against damage caused by
unforeseen development-related impacts. Natural decline and failure of trees is
not predictable.
Cordially, !
Tony Shoffner
ISA Certified Arborist #PN-0909A, CTRA #1759
3
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#1
#2#3
#4
#5
#6#7
#8 #9
#10
#11
#12
#13
#14
#27#28
#15
#16
#17 #18
#19
#21
#22
#20
#23
#29#25
#24 #26
TREE INVENTORY AND RETENTION PLAN
SATHER S.P.
532 SW 3RD PL. RENTON, WA.
TREE HAS
FALLEN
N
Tree Tag #Species DBH Crown Diameter Rating Condition Notes Status
1 FC/Ps 16”20’1 Good condition and health, young and vigorous Removed
2 TP/Pc 10”16’2 Generally good condition, extensive pruning Retained
3 TP/Pc 8”16’2 Generally good condition, extensive pruning Retained
4 BC/Pe 12”24’1 Good condition and health, young and vigorous Removed
5 FC/Ps 12”15’1 Good condition and health, young and vigorous Retained
6 WRC/Tp 39”40’4 Poor condition and health, declining Removed
7 BLM/Am 18”36’1 Good condition and health, young and vigorous Retained
8 WRC/Tp 8”15’1 Good condition and health, young and vigorous Retained
9 PM/Am 30”40’2 Generally good condition and health, some decay Retained
10 CP/Pc 6”12’1 Good condition and health, young and vigorous Retained
11 WRC/Tp 24”30’4 Poor condition and health, declining Retained
12 Ap/Md 12”26’1 Good condition and health, young and vigorous Retained
13 PL/Pl 12”32’2 Generally good condition and health, some decay Retained
14 DF/Pm 26”40’2 Generally good condition and health, large and older Retained
15 BC/Pe 8”24’1 Good condition and health, young and vigorous Removed
16 BC/Pe 8”24’1 Good condition and health, young and vigorous Removed
17 BC/Pe 10”24’1 Good condition and health, young and vigorous Removed
18 BC/Pe 8”20’1 Good condition and health, young and vigorous Removed
19 Ap/Md 10”20’1 Good condition and health, young and vigorous Removed
20 BC/Pe 16”36’1 Good condition and health, young and vigorous Removed
21 BC/Pe 8”24’1 Good condition and health, young and vigorous Removed
22 BC/Pe 8”24’1 Good condition and health, young and vigorous Removed
23 BC/Pe 8”20’1 Good condition and health, young and vigorous Retained
24 BC/Pe 12”24’1 Good condition and health, young and vigorous Removed
25 BC/Pe 8”24’1 Good condition and health, young and vigorous Removed
26 BC/Pe 6”24’1 Good condition and health, young and vigorous Removed
27 BC/Pe 10”15’1 Good condition and health, young and vigorous Removed
28 BC/Pe 8”20’1 Good condition and health, young and vigorous Removed
29 BC/Pe 12”36’1 Good condition and health, young and vigorous Removed
Tree Tag #Number assigned to tree on survey tag
Species Species code:
Ap/Md=Apple (Malus domestica)FC/Ps=Flowering cherry (Prunus serrulata)
BC/Pe=Bittercherry (Prunus emarginata)PL/Pl=Portugal laurel (Prunus laurocerasus)
BLM/Am=Big leaf maple (Acer macrophyllum)PM/Am=Pacific madrone (Arbutus menziesii)
CP/Pc=Common pear (Pyrus communis)TP/Pc-=Thundercloud plum (Prunus cerasifera)
DF/Pm=Douglas fir (Pseudotsuga menziesii)WRC/Tp=Western red cedar (Thuja plicata)
Dbh Diameter at 4.5’ above ground surface
Crown diameter Maximum diameter of crown spread in feet
Rating Condition rating (1=Excellent condition and health; 2=Generally good condition and health;
3=fair condition and health, minor defects or stress 4=Poor condition and/or health)
Condition Notes General notes about health, condition and vigor
TREE EVALUTION DATA Sather Short Plat
1