Tree Survey Report for the Amberwood Project City of Wildomar

Transcription

Tree Survey Report
for the Amberwood Project
City of Wildomar, Riverside County, California
Prepared for:
Lennar Homes, Inc.
980 Montecito Drive, Suite 302
Corona, CA 92879
951.817.3500
Contact: Ms. Jarnne’ Valdez
Prepared by:
Michael Brandman Associates
220 Commerce, Suite 200
Irvine, CA 92602
714.508.4100
Contact: Diana Lloyd, Certified Arborist, Biologist
Report Date: December 17, 2012
Lennar Homes, Inc. - Amberwood Project
Tree Survey Report
Table of Contents
Table of Contents
Section 1: Introduction ......................................................................................................... 1
1.1 - Survey Area Location.......................................................................................... 1
1.2 - Environmental Setting ......................................................................................... 1
Section 2: Methodology........................................................................................................ 9
Section 3: Results ............................................................................................................... 13
Section 4: Regulatory Framework ..................................................................................... 17
Section 5: Findings ............................................................................................................. 19
Section 6: References......................................................................................................... 23
Appendix A: Tree Survey Data Table
Appendix B: Detailed Inset Maps
Appendix B - Tree Location Index Map
B.1 - Tree Location Map
Appendix C: Disclaimer
List of Tables
Table 1: Summary of Tree Species in the Survey Area ........................................................ 13
List of Exhibits
Exhibit 1: Regional Location Map............................................................................................ 3
Exhibit 2: Local Vicinity Map - Topographic Base ................................................................... 5
Exhibit 3: Local Vicinity Map - Aerial Base.............................................................................. 7
Exhibit 4: Tree Location Map ................................................................................................ 11
Exhibit 5: Species Location Map ........................................................................................... 15
Exhibit 6: Tree Conservation Area ........................................................................................ 21
H:\Client (PN-JN)\2156\21560078\Arborist\21560078 Arborist 12-17-2012.doc
iii
Tree Survey Report
Introduction
SECTION 1: INTRODUCTION
This report presents the results of a tree inventory survey conducted by First Carbon SolutionsMichael Brandman Associates (MBA) for the Amberwood Project located in the City of Wildomar,
County of Riverside, California. The arborist survey is consistent with scientific and professional
standards accepted by the International Society of Arboriculture (ISA). This report provides
identification, location, and size of trees within the project impact area. This tree survey is required
for activities associated with development of the site. The survey and report adhere to all applicable
standards of the International Society of Arboriculture (ISA) and is in accordance with the City of
Wildomar’s request for the tree survey.
1.1 - SURVEY AREA LOCATION
The project is generally located north of State Route (SR) 79, south of SR-74, east of Interstate (I) 15,
and west of I-215, in the southern portion of the City of Wildomar, Riverside County, California
(Exhibit 1). The project site is located within Section 6 of Township 7 South and Range 3 West of
the Murrieta, California, United States Geological Survey (USGS) 7.5-minute topographic quadrangle
map (Exhibit 2). The project area is specifically located north of I-15, south of Clinton Keith Road,
east of Kennadine Drive, and west of Elizabeth Lane (Exhibit 3).
The survey area within the project site includes trees planted within grading areas and within 50 feet
of grading areas.
1.2 - ENVIRONMENTAL SETTING
The project site covers 24 acres and is situated on a disturbed rural slope with an elevation of
approximately 1,300 feet above mean sea level (MSL). Portions of the project site contain previously
developed rural residences that have been recently torn down (2011) as required by the City of
Wildomar. Some of the trees surveyed are non-native ornamental or fruit trees that were part of the
landscaping around the previously existing residences. Other trees on the site are associated with
southern cottonwood-willow riparian forest in a drainage feature.
The project site is bounded by residential development to the southeast, commercial and industrial
development to the west and northwest, and natural open space with several dirt access roads to the
north and south.
1
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60
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·
91
(
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&
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Woodcrest
215
Mystic Lake
Perris Reservoir
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|
·
79
Lake Mathews
Nuevo
Perris
San Jacinto
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!
$
#
15
þ
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Project Site
74
Sun City
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Text
NOT
TO SCALE
Hemet
Menifee
Railroad Canyon Reservoir
Lake Elsinore
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·
74
Cleveland National Forest
79 Diamond Valley Lake
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|
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&
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Lake Elsinore
Winchester
215
Wildomar
þ
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74
Skinner Reservoir
!
Murrieta
Project Site
Murrieta Hot Springs
Temecula
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ide
San
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nty
þ
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79
Rainbow
Fallbrook
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15
Cleveland National Forest
þ
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|
·
76
Camp Pendleton North
þ
}
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76
Bonsall
NORTH
Source: Census 2000 Data, The CaSIL, MBA GIS 2012.
5
21560078 • 12/2012 | 1_regional.mxd
2.5
0
5
Miles
Exhibit 1
Regional Location Map
LENNAR HOMES, INC. • AMBERWOOD PROJECT
ARBORIST REPORT
Project Site
NORTH
Source: TOPO! USGS Murrieta, CA (1976) and Wildomar, CA (1997) 7.5' DRG.
2,000
21560078 • 122012 | 2_local_topo.mxd
1,000
0
2,000
Feet
Exhibit 2
Local Vicinity Map
Topographic Base
ARBORIST REPORT
George
George Ave
Ave
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15
Project Site
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ar
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aks
Rd
Elizabeth
Elizabeth Ln
Ln
RRdd
Kennadine
Kennadine Dr
Dr
nn
ttoo
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KKee
Inland
Inland Valley
Valley Dr
Dr
Clinton
Clinton Keith
Keith Rd
Rd
Rd
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15
NORTH
Source: ESRI Aerial Imagery.
2,000
1,000
21560078 • 12/2012 | 3_local_aerial.mxd
0
2,000
Feet
Exhibit 3
Local Vicinity Map
Aerial Base
ARBORIST REPORT
Tree Survey Report
Methodology
SECTION 2: METHODOLOGY
Prior to the tree survey in the field, reference materials such as aerial photography, the Murrieta
USGS topographic map, and applicable local policies regarding tree protection were reviewed.
The tree survey was conducted by MBA biologist Scott Crawford and certified arborist Diana Lloyd
(ISA No. WE-8790A) on December 11 and 12, 2012.
The survey was conducted on foot to survey all trees in the survey area. The survey area includes the
project development footprint, which includes all grading areas and any offsite disturbance, as well as
a 50-foot buffer surrounding the development footprint. For the purpose of this report, “tree” is
defined as: a woody perennial plant, typically having a single trunk and bearing lateral branches at
some distance from the ground. Trees with a trunk greater than 4 inches in Diameter at Breast Height
(DBH; 1.3 meters or 4.5 feet from the ground) were surveyed, however, trees with a trunk less than 4
inches in DBH and shrubs were not surveyed. Shrubs include plants that are greatly branched from
the base with none of the stems reaching 4 inches in DBH. For woody trees having multiple trunks,
the DBH of each trunk was recorded and summed, per standard arborist practice. The Italian cypress
trees (Cupressus sempervirens) on the site had foliage very low on the trunk, therefore, the trunk
diameter of these trees could only be measured beneath the green foliage near the base of the trunk.
The City of Wildomar is particularly interested in impacts to any mature trees and oak trees. The City
of Wildomar defines a “mature tree” as having a DBH of greater than 9.5 inches.
For identification, a round, numbered aluminum tag was nailed at the base of each tree on the north
side; if the north side of the tree was inaccessible, the most accessible direction was tagged. Tree
numbers used during the survey include 298 to 347, and 401 to 479; three trees do not have a tag due
to inaccessibility beyond a fence, but were mapped.
The location of each tree was mapped using a Trimble GeoXT Global Positioning System (GPS)
hand-held unit. This unit provides sub-meter accuracy in real-time. The tree location map was
prepared using the digital data collected in the field (Exhibit 4).
The following data was recorded for each tree during the field survey:
• Tag number
• Tree species
• DBH
• Trunk location
9
Legend
Tree Location
Construction Avoidance Area
50-Foot Buffer Area
Development Boundary
439
313 311 309 306 303 301 298
440
441
no tag
316
320
315
314
325
318
319
445
444 443
446 473
453 476
450 456 479 478
466
451
463
442
321
341
322
323
343
344
407
438
436
409
410 411
412
345
347
348
406
405
419
433
340
342
324
435
327
329
332
335
337
338
339
403
405
413
414
415
416
418
418
432
431
430
429
428
426
427
425
424 423
420
NORTH
Source: ESRI Aerial Imagery. MBA 2012
115
57.5
21560078 • 12/2012 | 4_Tree_Locationl.mxd
0
115
Feet
Exhibit 4
Tree Location Map
ARBORIST REPORT
Tree Survey Report
Results
SECTION 3: RESULTS
The project site was previously used as a residential development, but has recently been abandoned.
The houses have been demolished, however, many of the mature landscaped trees remain. Weed
abatement activities has also caused recent disturbance to the project site. A total of 133 trees were
mapped on the site, of which 78 are classified as “mature trees” (greater than 9.5” DBH). One Coast
live oak overhangs onto the project site, but would be preserved.
Appendix A provides the tree survey data table with details on all of the trees surveyed within the
survey area including which would be preserved and which would be removed. Appendix B provides
more detailed maps depicting each tree’s location and tag number. Table 1 below, summarizes the
total quantity of each species of tree surveyed within the project site, including whether the tree is
considered a mature tree by the City of Wildomar, and is shown in Exhibit 5.
Table 1: Summary of Tree Species in the Survey Area
Common Name
Botanic Name
Quantity
Observed
Quantity of
Mature Trees
by Species
Albizia julibrissin
Persian silk tree
1
0
Cupressus sempervirens
Italian cypress
31
13
Eucalyptus camaldulensis
Red river gum
8
8
Eucalyptus polyanthemus
Red box
1
1
Fraxinus velutina
Arizona ash
4
2
Fraxinus uhdei
Shamel ash
1
1
Melia azedarach
Chinaberry
1
1
Morus alba
White mulberry
2
1
Myoporum laetum
Ngaio
1
1
Olea europa
Olive
2
2
Pinus attenuata
Knobcone pine
1
1
Pinus halapensis
Aleppo pine
1
0
Populus fremontii
Freemont cottonwood
22
12
Prunus persica
Peach
1
1
Quercus agrifolia
Coast live oak
1
1
Salix laevigata
Red willow
30
10
Schinus molle
Peruvian pepper
25
23
133
78
Total
13
Legend
coast live oak Mature Trees
Construction Avoidance Area
Project Site Boundary
cottonwood
Immature Trees
mulberry
Aleppo pine
myoprum
Arizona ash
olive
Cinaberry tree
red box
Knobcone pine
red river gum
Persian silk tree
red willow
Peruvian pepper tree
Arizona ash
Cinaberry tree
Italian Cypress
peach
Italian Cypress
Aleppo pine
shamel ash
Knobcone pine
Persian silk tree
Peruvian pepper tree
coast live oak
cottonwood
mulberry
myoprum
olive
peach
red box
red river gum
red willow
shamel ash
NORTH
115
57.5
0
21560078 • 12/2012 | 5_Species_Location_Map.mxd
115
Feet
Exhibit 5
Species Location Map
ARBORIST REPORT
Tree Survey Report
Regulatory Framework
SECTION 4: REGULATORY FRAMEWORK
The City of Wildomar only regulates the trimming or removal of trees on public rights-of-way, not on
private property. However, in the City’s revised letter (November 28, 2012) regarding the planning
application for this development, the City specifically requested the following:
1. Specify whether there are any existing mature trees with a trunk caliper over 9.5 inches or
whether there are any Quercus agrifolia (coast live oak) on the property. If any are existing,
label their locations, trunk caliper, species, whether they will be removed or preserved. If
none exist, specify it.
2. Please provide a tree preservation plan that identifies all trees within the project boundary and
indicates trees that will be saved and incorporated into the project design.
3. Label all existing tree species, and trunk caliper for all trees within 50 feet of and within the
off-site grading areas.
17
Tree Survey Report
Findings
SECTION 5: FINDINGS
There are no coast live oaks within the project site. There is one coast live oak tree located within the
50-foot buffer area (Appendix B-1). The canopy of this oak tree overhangs onto the project site in the
northwest corner of the site immediately south of the adjacent property owner. This oak tree would
not be removed during project construction, but would be preserved in the designed open-space area
west of the project site.
All of the native and non-native trees within the development boundary would be removed, except for
the small group of trees in the northwestern corner of the project site, immediately north of the coast
live oak. These trees are also located within the 50-foot buffer area. Five Freemont cottonwood trees
would also be avoided during construction and preserved in the designated open-space area.
The remaining trees within the project site would be conserved within the designated open-space
(Exhibit 6). At the direction of the City of Wildomar staff, the trees within the conservation area
were not included in this tree report. Based on the previous surveys of the project site, the estimated
number of trees within the conservation area is well over 230 individuals. The riparian habitat
associated with the conservation area contains a mix of mature trees and immature saplings. Tree
species include Fremont cottonwood, red willow, arroyo willow, black willow, and coast live oak.
19
Legend
Tree Conservation Area
Development Boundary
Designated Open Space Area
Project Site Boundary
NORTH
200
100
21560078 • 12/2012 | 4_Tree_Locationl.mxd
0
200
Feet
Exhibit 6
Tree Conservation Area
ARBORIST REPORT
Tree Survey Report
References
SECTION 6: REFERENCES
Bassi, M.C. on behalf of the City of Wildomar. 2012. Letter to Ms. Jarnne’ Valdez, regarding
Planning Application No. 12-0364 (Lennar Residential Project). November 15; revised
November 28.
U.S. Geological Survey. 1975. 7.5' Murrieta, Quadrangle California [map]. 1:24,000. 7.5-minute
Series. Washington D.C.
23
Tree Survey Report
Appendix A:
Tree Survey Data Table
Tree Survey Report
Appendix B:
Detailed Inset Maps
Tree Survey Report
Appendix C:
Disclaimer
Tree Survey Report
Disclaimer
DISCLAIMER
Arborists are tree specialists who use their education, knowledge, training, experience, and research
to examine trees and woodlands. Arborists recommend measures to enhance the beauty and health of
trees and forests, while attempting to reduce the risk of living near them. Clients may choose to
accept or disregard the recommendations of the arborist or seek additional advice.
Arborists cannot detect every condition that could possibly lead to the structural failure of a tree.
Trees are living organisms subject to attack by disease, insects, fungi and other forces of nature.
There are some inherent risks with trees that cannot be predicted with any degree of certainty, even
by a skilled and experienced arborist. Arborists cannot predict acts of nature including, without
limitation, storms of sufficient strength, which can cause even a healthy tree to fail. Any entity that
develops land and builds structures with a tree in the vicinity should be aware and inform future
residents of the risks of living with trees and this arborist’s disclaimer.
Arborists cannot guarantee that a tree will be healthy or safe under all circumstances, or for a
specified period of time. Likewise, remedial treatments, like medical care, cannot be guaranteed. In
addition, construction activities are hazardous to trees and cause many short and long-term injuries,
which can cause trees to die or topple either in the short term or over many years or decades.
Treatment, pruning, and removal of trees may involve considerations beyond the scope of the
arborists services, such as property boundaries, property ownership, disputes between neighbors, and
other issues. Consulting arborists cannot take such considerations into account unless complete and
accurate information is disclosed to the arborist by the client. An arborist should then be expected to
reasonably rely upon the completeness and accuracy of the information provided.
Neither the author nor Michael Brandman Associates has assumed any responsibility for liability
associated with the trees on or adjacent to this project site, their future demise and/or any damage,
which may result from them. To live near trees is to accept some degree of risk.
C-1

Tree Survey Report for the Amberwood Project City of Wildomar

Transcription

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