HomeMy WebLinkAbout6.3 RPCA La Porte Rd Oak Woodland Eval (6.2.23) FINAL
LA PORTE ROAD SOLAR PROJECT
OAK WOODLAND EVALUATION PLAN
BUTTE COUNTY, CALIFORNIA
JUNE 2023
ONLY THE CLIENT OR ITS DESIGNATED REPRESENTATIVES MAY USE THIS DOCUMENT AND ONLY FOR
THE SPECIFIC PROJECT FOR WHICH THIS REPORT WAS PREPARED.
Project 20232542.001A June 2023
Prepared for:
Stephanie Loucas
VP, Development
RPCA Solar 6, LLC
Wildcat Renewables, LLC
Renewable Properties, LLC
879 Sanchez Street
San Francisco, CA 94114
La Porte Road Solar Project
Oak Woodland Evaluation Plan
Butte County, California
Prepared by:
Susan Dewar
International Society of Arboriculture Certified Arborist WE-7374A
Phone: 530-521-2385
Reviewed by:
Lisa Achter
Senior Biologist
KLEINFELDER
2882 Prospect Park Drive, Suite 200
Rancho Cordova, CA 95670
June 2023
Kleinfelder Project No. 20232542.001A
Project 20232542.001A June 2023
TABLE OF CONTENTS
Section Page
SUMMARY .................................................................................................................................................................... 1
1 INTRODUCTION ............................................................................................................................................. 2
1.1 Background and Project Description ................................................................................................. 2
1.2 Project Location ................................................................................................................................. 2
2 REGULATORY SETTING ............................................................................................................................... 2
2.1 Senate Bill 1334 ................................................................................................................................ 2
2.2 Butte County Draft Oak Woodland Mitigation Ordinance .................................................................. 4
2.2.1 Oak Canopy Mitigation ........................................................................................................ 5
2.2.2 Oak Canopy Replacement Ratio ......................................................................................... 5
2.3 Oak Woodland Technical Manual ...................................................................................................... 6
3 METHODS ....................................................................................................................................................... 6
3.1 Desktop Mapping............................................................................................................................... 6
3.2 Field Survey ...................................................................................................................................... 6
4 RESULTS ........................................................................................................................................................ 7
4.1 Description of Oak Woodland ............................................................................................................ 7
4.2 Measure of Canopy ........................................................................................................................... 7
4.3 Oak Woodland to Remain ................................................................................................................. 7
4.4 Fencing Plan and Preservation Measures ......................................................................................... 9
4.5 Proposed Replacement ................................................................................................................... 10
5 REFERENCES CITED .................................................................................................................................. 11
FIGURES
Figure 1 Site Location .................................................................................................................................................... 3
Figure 2 Oak Canopy and Trunk Locations ................................................................................................................... 8
ATTACHMENTS
A RPCA La Porte Road Solar Project Site Plan
B RPCA La Porte Road Solar Project Representative Site Photos
C RPCA La Porte Road Solar Project Tree Inventory within Project Area
Project 20232542.001A Page 1 June 2023
LA PORTE ROAD SOLAR PROJECT
OAK WOODLAND EVALUATION PLAN
_____________________________________________________________________________________________
SUMMARY
The proposed RPCA La Porte Road Solar Project (Project) is a small-scale utility solar generating and energy storage
project located near the unincorporated community of Bangor, in Butte County, California (Figure 1). In September of
2022 and May of 2023, Kleinfelder Certified Arborist Susan Dewar performed an oak tree survey and mapped the tree
canopy within the parcel where the Project is located (APN # 028-240-061; Project Site). The locations, sizes, and
condition of native oak trees (of the genus Quercus) were documented.
The tree survey focused on the approximate 23.5-acre area within the proposed security fence and proposed access
road (Project Area). In addition, the canopy area for oak trees within the subject parcel (Project Site) but outside the
Project Area were mapped.
This report serves to document the methods and results of the oak tree and canopy mapping survey, describes the
condition of the oak woodland on the subject property, and analyzes the potential Project impacts to oak woodland
canopy.
Project 20232542.001A Page 2 June 2023
1 INTRODUCTION
1.1 BACKGROUND AND PROJECT DESCRIPTION
The La Porte Road Solar Project is a small-scale utility solar generation project located on approximately 23.5 acres
of an 82-acre parcel located just northeast of the unincorporated community of Bangor in Butte County, California. The
Project is located at 5864 La Porte Road (APN # 028-240-061). Wildcat Renewables, LLC has entered into a long-term
lease agreement with the property owner (Ross W. McGowan Trust) to facilitate the development of a small-scale,
solar energy generating facility.
The Project will generate a total of 3.0 megawatts (MW) alternating current (AC) (4.2 MW direct current [DC]) of clean,
reliable solar energy when complete. The Project will interconnect to Pacific Gas and Electric Company’s (PG&E’s)
pre-existing electrical distribution system located on site. The power generated from this facility will be sold to PG&E
through a long-term Power Purchase Agreement (PPA). Additionally, the Project will be equipped with energy storage
technology that will allow on site renewable energy generation to be stored and dispatched onto the grid when needed.
The Project will utilize approximately 7,776 solar modules and 24 string inverters to convert the sun’s energy into
usable, AC power. Single-axis tracking technology will be utilized to allow the modules to efficiently track the sun
throughout the day and maximize the efficiency of solar collection. The modules will be mounted on a steel racking
system, which will be anchored into the ground using driven steel piers. The overall height of the array will be no more
than 15-feet tall. See Attachment A for the project site plan.
1.2 PROJECT LOCATION
The approximate 82-acre parcel is located on the east side of La Porte Road, approximately 0.35-mile northeast of the
intersection of Los Verjeles Road and La Porte Road (Figure 1). The parcel is surrounded primarily by rural residential
properties where grazing and small-scale agricultural practices are common.
The Project Area is located at an elevation of approximately 800-900 feet above mean sea level in the foothills of the
Sierra Nevada. No structures are located in the Project Area; however, a residence is located in the northern portion
of the parcel.
The Project Area is situated within Township 18 North, Range 5 East, and Section 27 of the Bangor 7.5-minute U.S.
Geological Survey (USGS) quadrangle. The corresponding latitude and longitude at the approximate center of the
Project Area is 39°23'36.33" north latitude and 121°23'57.49" west longitude.
2 REGULATORY SETTING
2.1 SENATE BILL 1334
Senate Bill (SB) 1334 (Oak Woodlands Conservation: Environmental Quality) passed in 2004, and requires counties
with oak woodlands to consider significant impacts as defined in the California Environmental Quality Act (CEQA) for
all non-agricultural projects affecting oaks, and to develop an oak woodlands management plan.
ProjectLocation
^_±0 2.5 5Kilometers
Figure 1. Regional VicinityRPCA La Porte RoadSolar ProjectButte County, California01.5 3MilesCreated By: C BARKERSWITZER Document Path: \\azrgisstorp01\GIS_Projects\Client\GANDA\Renewable_Properties\20232542_RPCA_LaPorte_Solar\Figure1_LaPorte_Solar_RegionalVicinity.mxdScale 1:190,080
Source: Bing Maps
1 in = 3 miles
^_
Project Location
§¨¦5
Æÿ45 Æÿ70
Æÿ99
Æÿ20
Æÿ49
Æÿ20
Æÿ162
Æÿ174
Æÿ149
Æÿ191
Æÿ99
Æÿ49
§¨¦80
Æÿ32
Æÿ65
PLUMASCOUNTYPLUMAS COUNTY
BUTTE COUNTYGLENNCOUNTY
SIERRACOUNTY
YUBA COUNTY NEVADACOUNTYCOLUSACOUNTYSUTTERCOUNTYPLACERCOUNTY
PLACERCOUNTY
Parcel Boundary
Project 20232542.001A Page 4 June 2023
2.2 BUTTE COUNTY DRAFT OAK WOODLAND MITIGATION ORDINANCE
The Butte County Draft Oak Woodland Mitigation Ordinance (ordinance; Butte County 2018a) sets standards for oak
canopy retention and establishes an in-lieu payment methodology for oak canopy removal for discretionary projects.
Projects that require the removal of oak canopy and/or trees but are less than the thresholds established under the
CEQA Significance Criteria are not considered a potentially significant impact and do not require mitigation to reduce
impacts to Less Than Significant levels. Under the ordinance, oak trees and canopy are defined as:
- native tree species in the genus Quercus not designated as Group A or Group B commercial species pursuant
to regulations adopted by the State Board of Forestry and Fire Protection pursuant to Public Resources Code
Section 4526,
- and that are five (5) inches or more in diameter at breast height ([DBH]; (i.e., the diameter of the trunk at 4.5
feet above natural grade).
- Oak canopy is defined as the surface area directly under the live branches of oak trees.
- Oak woodland is defined as any oak tree or group of oak trees. Project site land where a majority of living
trees are native oaks and with 10 percent or greater oak canopy cover. The 10 percent canopy cover standard
applies to the individual stand of oaks and not to the entire project site; consequently, a project site may
contain one or more oak woodland.
The provisions of the ordinance apply to discretionary projects that result in land development and removal of oak
canopy or disturbance to the critical root zone (CRZ; a circle on the ground around a tree that generally corresponds
to the drip line of the tree1). The ordinance requires preparation of an Oak Woodland Evaluation Plan for discretionary
projects to document existing conditions and the extent of oak woodland area that could be adversely impacted by
construction and operation of a proposed project or new development.
Discretionary projects are subject to the following thresholds of significance regarding removal of oak canopy and/or
oak trees:
1. Oak Canopy Thresholds of Significance
a. Less than significant impact, no mitigation required. Oak canopy mitigation shall not be required
for projects that meet the following standards:
i. Ten percent or less of the oak canopy is removed;
ii. Where the oak woodland is of a severely degraded condition, then up to 10 oak trees,
regardless of whether the number exceeds the 10 percent canopy, may be removed without
a replacement requirement.
1 The Oak Woodland Technical Manual (Butte County 2018b) defines the CRZ as “a radius equal in feet to the number of inches
of a tree’s trunk DBH, with a minimum of eight feet” which differs from the ordinance definition of dripline.
Project 20232542.001A Page 5 June 2023
b. Less than significant impact with mitigation required. Removal of oak canopy exceeding the
thresholds above is reduced to a level of less than significant through oak canopy mitigation.
Mitigation shall be required for removal of over 10 percent and up to 70 percent total oak canopy
cover.
c. Independent evaluation required. If the total removal of oak canopy exceeds 70 percent,
alternative analysis is required to determine if the impact can be reduced to a level of less than
significant.
2. Oak Tree Removal and Additional Requirement:
a. The removal of any oak tree within the less than significant canopy removal threshold that is 24
inches DBH or greater shall be replaced at a ratio of 2:1 for the oak canopy removed.
2.2.1 OAK CANOPY MITIGATION
If a project exceeds the removal thresholds described above, then direct replacement of trees or contribution of funds
or dedication of land inside Butte County boundaries must occur. Mitigation shall be of similar species mix, density of
oak canopy, of the type of oak woodland found on the project site, and viability as would be found in a naturally occurring
and healthy oak woodland. The project shall include one of a combination of the following measures as mitigation:
1. Conservation easement
2. Payment to a mitigation bank
3. Payment to an accredited land trust
4. Payment to the State Oak Woodlands Conservation Fund
2.2.2 OAK CANOPY REPLACEMENT RATIO
1. A 2:1 replacement ratio shall apply to the removal of more than 10% and up to 50% of the total oak canopy.
2. A 3:1 replacement ratio shall apply to removal that exceeds 50% and up to 70% of the total oak canopy
3. Replacement ratios for oak canopy removal exceeding 70% requires alternative analysis.
4. Replanting within the project site does not count toward the replacement ratio requirements.
Project 20232542.001A Page 6 June 2023
Table 1: Oak Canopy Replacement Ratios by Percent Removal2
Percent
Range 0 to 10% 10.1% to 50% 50.1% to 70% 70.1% to 100%
Replacement None 2:1 Replacement Ratio 3:1 Replacement
Ratio
See Section 53-5 of
ordinance (additional
analysis)
Note: the replacement ratios apply to the percentage removal of oak canopy within the range. For example, at 28% canopy removal,
the mitigation requirement is for the 18% that exceeds the 10% less-than-significant portion of the canopy removal.
The total oak canopy area for mitigation shall be calculated by the area of oak canopy proposed for removal multiplied
by the respective replacement ratios by percent removal.
Where a County approved conservation easement, mitigation bank or accredited land trust carries out the mitigation
through replanting, the replanting shall be similar to the oak canopy removed or the following minimum replacement
standard, whichever is greater. The minimum replacement planting standard is one or a combination of the following:
1. Replacement trees: 200 trees (sapling in 1-gallon or greater) per acre of replacement oak canopy.
2. Replacement acorns: 600 acorns per acre of replacement oak canopy
2.3 OAK WOODLAND TECHNICAL MANUAL
The Oak Woodland Technical Manual (manual; Butte County 2018b) is a companion document to the ordinance that
establishes specific technical regulations, standards and specifications necessary to implement the ordinance.
3 METHODS
3.1 DESKTOP MAPPING
A Kleinfelder geographic information system (GIS) specialist utilized publicly available aerial imagery to map tree
canopies on the subject parcel. The aerial image and digitized data were uploaded to a mobile global positioning
system (GPS) device and printed map for use during the field survey.
3.2 FIELD SURVEY
A field survey was performed by Kleinfelder Certified Arborist Susan Dewar on September 27 and 29, 2022, and May
11, 2023, to verify and edit the digitized tree canopies and to document species, size, and condition of oaks greater
than five inches in DBH within the Project Area that are likely to be impacted by project activities. The arborist recorded
the location of each oak tree trunk within the Project Area (or with CRZ within the Project Area) with a GPS unit capable
2 Source: adapted from “An Ordinance of the County of Butte Adding Chapter 53, Entitled “Development Mitigation,” and Article I,
Entitled “Oak Woodland Mitigation,” to the Butte County Code” (Butte County 2018a)
Project 20232542.001A Page 7 June 2023
of sub-meter accuracy (Figure 2). The canopies of non-oak species or dead trees were clipped from the canopy outline
to produce the final oak canopy area (Figure 2).
4 RESULTS
4.1 DESCRIPTION OF OAK WOODLAND
The parcel is composed primarily of non-native annual grasses and forbs with scattered patches of blue oak (Quercus
douglasii) woodland. The majority of the oaks onsite are blue oaks, however interior live oak (Quercus wislizeni) and
valley oak (Quercus lobata) are also present in low numbers. Other tree species present include foothill pine (Pinus
sabiniana), willow (Salix spp.), and white mulberry (Morus alba). The species dominant within the non-native annual
grassland of the understory and between the oaks included rattlesnake grass (Briza maxima), filaree (Erodium sp.),
soft chess (Bromus hordeaceus), wild oats (Avena sp.), clover (Trifolium sp.), medusa head (Elymus caput-medusae),
salt grass (Distichlis spicata), Italian thistle (Carduus pycnocephalus), yellow star thistle (Centaurea solstitialis), and
tarweed (Madia sp.).
The site includes one residence in the northern portion of the parcel and a few small artificial impoundments, likely to
provide water for livestock. There is presence of some invasive plant species such as yellow star thistle and Italian
thistle. Many small trees are dead or severely drought stressed with thin canopies. Despite the drought and understory
composition, the overall condition of the oak woodland would be considered “Intact” per the University of California
Oak Woodland Impact Decision Matrix methodology (Butte County 2018a).
4.2 MEASURE OF CANOPY
A total of 9.91 acres of oak canopy is present on the Project Site (parcel). As designed, the Project will remove 0.10-
acre of oak canopy for the proposed access road (1% of the oak canopy). The Project will not result in removal of any
tree 24-inches DBH or larger. Since the Project will not result in removal of oak canopy acreage above the 10%
threshold of significance replacement mitigation will not be required.
4.3 OAK WOODLAND TO REMAIN
The project has been designed to minimize fragmentation of the oak woodland to remain. Most major equipment
associated with the project will be situated in non-native grassland along the southern portion of the parcel, adjacent
to the neighboring house and other associated residential developments. The oak woodland along Wilson Creek, an
intermittent waterway and potential wildlife corridor crossing the parcel from west to east, will be preserved in addition
to large groups of oaks to the north and east of the array (Figure 2). The Wilson Creek corridor connects to large
expanses of intact oak woodland east of the parcel and to some intact oak woodland across La Porte Road west of the
parcel.
ProjectLocation
^_
Tree Canopy and Trunk LocationRPCA La Porte Road Solar ProjectButte County, CaliforniaCreated By: CBarkerSwitzer Document Path: \\azrgisstorp03\GIS_Projects\Client\GANDA\Renewable_Properties\20232542_RPCA_LaPorte_Solar\LaPorte_Solar_Tree_Canopy_11x17.mxdProject Site /Parcel Boundary (79.38 acres)
Project Fence
Access Road
Solar Array
Protective Fencing
Wilson Creek
Critical Root Zone (4.56 acres)
Oak Canopy (9.91 acres)
!(Trunk Location
Potential Removal or Encroachment ±0 40 80Meters
0 125 250Feet
1 Inch = 250 FeetScale1:3,000
Project 20232542.001A Page 9 June 2023
4.4 FENCING PLAN AND PRESERVATION MEASURES
Trees that will remain within or adjacent to the work area will be demarcated by a protective barrier and signage to:
1. Keep foliage, branches and crown clear from contact with equipment, materials and activities;
2. Preserve roots and soil conditions in an intact and non-compacted state;
3. Visually identify the CRZ in which no soil disturbance is permitted and activities are restricted, unless
otherwise approved.
A protective fence made of chain link or high visibility plastic mesh fencing will be placed five feet beyond the
established CRZ of the tree or group of trees being protected adjacent to work areas under the approval of a qualified
professional. Warning signs shall be prominently displayed on each fence to ensure avoidance of protected trees. The
signs shall be a minimum of 16 x 24 inches, brightly colored and clearly visible from the ground and from vehicles. The
signs must clearly indicate that the CRZ is a restricted area. The tree fencing shall be installed before any demolition,
clearing, grading or other construction begins and shall remain in place until the final inspection by a qualified
professional.
The ordinance (Butte County 2018a) defines the CRZ as the dripline while the manual (Butte County 2018b) defines
CRZ as the radius in feet equal to the inches of a tree’s DBH (with an 8-foot minimum distance for trees with DBH of
5-8”). Where possible, the more conservative (farther) distance will be utilized for placement of protective fencing.
Activities prohibited within the CRZ include:
Grade changes
Drainage changes
The severing of roots over 2” in diameter (unless done with approval from a qualified professional)
Heavy equipment use, vehicular traffic, parking of vehicles
The use of tree trunks as winch support, anchorage, as a temporary power pole, signpost or other similar
function
Storage or dumping of construction materials, waste, or tools
Trenching, pipe or conduit installation within the CRZ must either be cut by hand, air spade, by mechanically boring a
tunnel under the roots with a horizontal directional drill (hydraulic or pneumatic air excavation) or any other method
approved by a qualified professional (Certified Arborist). Tunneling under a root system can greatly reduce damage to
the tree as well as minimizing the cost of replacing landscaping or other features. Tunneling may be restricted by sloped
areas or rocky soils. Once the pipe or conduit has been installed, the tunnel should be backfilled with excavated soil
and the disturbed area should be irrigated the same day.
Compaction of soil around tree roots can impair tree development by restricting drainage and inhibiting new root growth.
Damage from soil compaction can manifest years after construction activities take place. To ensure damage does not
occur after construction, maintenance personnel should avoid driving vehicles over the CRZ and drip line of trees. If
driving over these areas is unavoidable, tires should be deflated slightly to redistribute the weight over a larger area. If
repeated crossings are required, up to six inches of mulch should be placed over the CRZ to prevent compaction. The
mulch material shall be composed of two-inch untreated wood chip mulch or an approved equal per the qualified
professional. Plywood can also be used to construct a temporary crossing bridge that distributes vehicle weight over
Project 20232542.001A Page 10 June 2023
the CRZ. The contractor shall consult with a qualified professional to determine the best mitigation method and to
review soil compaction mitigations before beginning construction.
If a tree or group of trees is adjacent to or in the immediate proximity to a grade slope of 8% (23 degrees) or more,
then erosion control or silt barriers shall be installed outside the CRZ to prevent siltation and/or erosion within the CRZ.
Erosion and sedimentation control barriers shall be installed or maintained in a manner which does not result in soil
build-up within tree drip lines or CRZs.
The project contractor, consultant or manager will collaborate with a qualified professional to verify, in writing, that all
pre-construction oak woodlands preservation conditions have been met as follows:
1. Tree fencing has been installed around any trees or tree areas that are to be preserved.
2. Erosion control has been secured on trees or tree areas that are to be preserved.
3. Tree pruning has been completed, if necessary.
4. Preventative measures for soil compaction have been installed.
5. A tree maintenance schedule has been established, if needed.
Written verification of the above conditions must be submitted to and approved by the Department of Development
Services prior to the removal of oak trees.
Contractors or employees who will be interacting with trees or operating within the CRZ must attend a pre-construction
meeting with a qualified professional. The meeting will be intended to ensure that all involved parties are aware of the
tree protection measures and procedures that will be employed. The meeting will also review procedures, tree
protections, hauling routes, staging areas and any other procedures deemed important by a qualified professional.
Additional measures for tree preservation during construction are detailed in the Oak Woodland Technical Manual
(Butte County 2018b).
4.5 PROPOSED REPLACEMENT
Since the threshold of significance of removal of 10% of oak woodland canopy area will not be exceeded and removal
of trees with 24-inch or greater DBH will not occur, the Project does not require replacement planting. The Project will
result in a less than significant impact, with no mitigation required.
Project 20232542.001A Page 11 June 2023
5 REFERENCES CITED
Butte County. 2018a. An Ordinance of the County of Butte Adding Chapter 53, Entitled “Development Mitigation,” and
Article I, Entitled “Oak Woodland Mitigation,” to the Butte County Code.
Butte County. 2018b. Oak Woodland Technical Manual (Draft). Department of Development Services. Dated October
23.
Project 20232542.001A June 2023
ATTACHMENT A: RPCA LA PORTE SOLAR PROJECT SITE PLAN
OVEOVEOVEOVEOVEOVEOVEOVEOVEOVEOVE
OVE
OVE OVE
OVE
OVE
OVE
OVE
OVE
OVE
OVE
OVE
OVE
OVE
OVE
OVE
OVE
OVE
OVE
OVE
OVE
OVE OVE
OVE
OVE
OVE
OVE
OVE
OVE
OVE OVE
OVE
OVE
OVE OVE
OVE
OVE
OVE
OVE
OVE
OVE
OVE
OVE
OVE
OVE
OVE
OVE
OVEOVEOVEOVE
OVE
OVE
OVE OVEOVE
OVE
OVE
OVE
OVE
OVE
OVE
COLLECTIONSEGMENTBATTERYSEGMENT12 3 4 5 6 7 8 COLLECTIONSEGMENTBATTERYSEGMENT12 3 4 5 6 7 8XX
X X X X X XXXXXXXXCOLLECTIONSEGMENTBATTERYSEGMENT12 3 4 5 6 7 8COLLECTIONSEGMENTBATTERYSEGMENT12345678
X
X
X
XXX X XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX X X X
X X
X X X X X X X X X X X X X X X X X X X X X XXX XXXXX X X X X XXX X X X X X
XXXX X X
MV MV MV MV
MVMV MV MV MV MV MV MV
MV M
V
MV MV MV MV MV MV MV MV
SITE PLAN
PV-100
SHEET TITLE
PROJECT
REVISIONS
SE48OIAEN*INEERIN* DESI*NASSOCIATES:::SE48OIAEN*INEERIN*CO0)A; 95 95:ALN8T CREE., CA 95955 LENNON LANE, S8ITE 5PHONE 95 9:::RENE:PROPCO0SAN )RANCISCO, CA 99 SANCHE= STREET,PHONE 5 5669LA PORTE ROAD SOLARLA PORTE ROAD, OROVILLE,CA 95966,LAT 9999LON 5GENERAL NOTES
1.REFER TO SINGLE LINE DIAGRAM FOR DETAILS.
2.INSTALLATION TO COMPLY WITH NEC 2020 ARTICLE 690 AND ALL APPLICABLE
LOCAL, STATE AND NATIONAL CODES OR REGULATIONS.
3.EQUIPMENT SHALL BE LABELED PER NEC 690 AND UTILITY REGULATIONS.
4.12' ACCESS ROADS SHALL BE DESIGNED TO ACCOMMODATE ALL CONSTRUCTION,
OPERATIONS, MAINTENANCE, AND UTILITY TRAFFIC THROUGHOUT THE SITE.
5.DIMENSIONS TO PROPERTY LINES AND EXISTING FEATURES ARE APPROXIMATE
PENDING SURVEY.
ARRAY LOCATION1
SCALE:1"=150'
N
SYSTEM SPECIFICATIONS
SYSTEM SIZE DC 4,203.36 kW
SYSTEM SIZE AC 3,000.00 kW
DC/AC RATIO 1.40
MODULE MANUFACTURER VSUN
MODULE MODEL VSUN540-144BMH
MODULE RATING 540 W
TOTAL MODULE QTY 7,784
MODULES PER STRING 28
TOTAL NO. OF STRINGS 278
INVERTER MODEL SUNGROW SG125HV
INVERTER RATING 125 kW
INVERTER QTY 24
STEP-UP TRANSFORMER 12kV/600V, 3000kVA
RACKING ATI HSAT
# OF 84 MODULE RACKS 50
# OF 56 MODULE RACKS 64
TILT ANGLE 0°
INTER-ROW SPACING 11.2'
PITCH 18.7'
GCR 40%
SITE AREA INSIDE FENCE 22.52 Ac
%ESS DETAILS
BESS DETAILS 3,000.00 kW
POI BESS CAPACITY 12,000 kWh
INVERTER MODEL EPC POWER CAB1000/AC - 2L.1
TOTAL INVERTER QTY 2
O) %ESS CONTAINERS 4
* MAX SYSTEM OUTPUT @POI IS LIMITED TO 3MW.
POWER STATION - (1) MV TRANSFORMER, (1) DAS,
(1) WEATHER STATION
12' WIDE SITE ACCESS GRAVEL ROAD
SETBACK
(E) OH LINESOVEOVE
LEGEND
MV CABLEMVMV
PROPERTY LINE
PROJECT SITE SECURITY FENCEXXX
(E) PUBLIC ROAD
SUNGROW 125kW STRING INVERTER
ATI 84 MODULE TRACKER ROW
ATI 56 MODULE TRACKER ROW
LA PORTE RD(N) UTILITY POLE (UTILITY
SCADA RECLOSER)
(N) PAD MOUNTED UTILITY
MAIN SERVICE METER
(N) PROJECT RISER POLE &
UTILITY AC DISCONNECT)
(E) UTILITY
POLE (POI)
(N) CUSTOMER POLE (RECLOSER)
2 7
SEASONAL WETLANDS
20.0' SETBACK
FROM FRONT
HIGH SLOPES
50.0' SETBACK
FROM WETLAND
LINEAR WATER FEATURES
TREES
20' FROM TREE CANOPY
CULVERT
18.7'11.2'
40.0' SETBACK
FROM SIDE
25.0'
SETBACK
FROM REAR
NOT FOR CONSTRUCTION, FOR IA DISCUSSION ONLY.
20.0'
12.0'
138.9'
270.4'
500.1'
EXISTING STRUCTURES
8
7
Project 20232542.001A June 2023
ATTACHMENT B: RPCA LA PORTE SOLAR PROJECT REPRESENTATIVE PHOTOS
Project 20232542.001A June 2023
Photo 1: View across Project area from southeast corner of array looking northwest (September 29, 2022)
Project 20232542.001A June 2023
Photo 2: View across Project area from southern edge center of array looking northwest (September 29, 2022)
Project 20232542.001A June 2023
Photo 3: View across Project area from southern edge center of array looking northeast (September 29, 2022)
Project 20232542.001A June 2023
Photo 4: View across Project area from southern edge center of array looking northwest (September 29, 2022)
Project 20232542.001A June 2023
Photo 5: View toward proposed Project access route along southwest edge of array looking west (September 29, 2022)
Project 20232542.001A June 2023
Photo 6: View toward proposed Project north of array looking south uphill into array area (September 29, 2022)
Project 20232542.001A June 2023
ATTACHMENT C: RPCA LA PORTE SOLAR PROJECT TREE INVENTORY WITHIN PROJECT AREA
Project 20232542.001A June 2023
Tree
Number Species
Trunk
DBH
(inches)
Estimated
Canopy
Diameter
(feet)
Anticipated Impact (tree removal or encroachment
on CRZ)
1 Blue Oak 9 20 No
2 Blue Oak 8 12 No
3 Blue Oak 6 10 No
4 Blue Oak 5 8 No
5 Blue Oak 6 8 No
6 Blue Oak 10 12 No
7 Blue Oak 14 25 No
8 Blue Oak 11 20 No
9 Blue Oak 12 25 No
10 Blue Oak 21 40 No
11 Blue Oak 6 10 No
12 Blue Oak 7 10 No
13 Blue Oak 10 10 No
14 Blue Oak 12 20 No
15 Blue Oak 13 20 No
16 Blue Oak 18 50 No
17 Blue Oak 15 40 No
18 Interior Live Oak 18 25 No
19 Interior Live Oak 12 25 No
20 Blue Oak 17 40
Possible encroachment on CRZ (tree within 25
feet of access road)
21 Blue Oak 11 12 No
22 Blue Oak 18 40 No
23 Blue Oak 24 40 No
24 Blue Oak 11 12 No
25 Blue Oak 10 12 No
26 Interior Live Oak 32 40 No
27 Interior Live Oak 36 60 No
28 Interior Live Oak 52 60 No
29 Interior Live Oak 10 30 No
31 Blue Oak 10 12 No
32 Blue Oak 19 40 No
33 Blue Oak 22 40 No
34 Blue Oak 6 12 No
35 Blue Oak 10 12 Likely removal‐ within 8 feet of access road
36 Blue Oak 6 10 Likely removal ‐ within access road
37 Blue Oak 7 10 No
38 Blue Oak 10 12 No
Project 20232542.001A June 2023
Tree
Number Species
Trunk
DBH
(inches)
Estimated
Canopy
Diameter
(feet)
Anticipated Impact (tree removal or encroachment
on CRZ)
39 Blue Oak
23 (two
stems,
9" and
14") 16 Likely removal ‐ within 4 feet of access road
40 Blue Oak 15 20 No
41 Blue Oak 19 40 No
42 Blue Oak 28 40 No
43 Blue Oak 20 40 No
44 Blue Oak 15 30 No
45 Blue Oak 24 30 No
46 Blue Oak 19 20 No
47 Blue Oak 6 10 No
48 Blue Oak 9 10 No
49 Blue Oak 15 16 No
50 Blue Oak 10 16 No
51 Blue Oak 9 16 No
52 Blue Oak 9 12 No
53 Blue Oak 5 8 No
54 Blue Oak 20 40 No
55 Blue Oak 11 10 No
56 Blue Oak 9 10 No
57 Blue Oak 19 16 No
58 Blue Oak 12 16 No
59 Blue Oak 10 16 No
60 Blue Oak 16 10 No
61 Blue Oak 22 60 No
62 Blue Oak 17 60 No
63 Blue Oak 10 6 No
64 Blue Oak 17 40 No
65 Blue Oak 13 30 No
66 Blue Oak 13 20 No
67 Blue Oak 18 20 No
68 Blue Oak 14 20 No
69 Blue Oak 24 40 No
70 Blue Oak 14 36 No
71 Blue Oak 12 12 No
72 Blue Oak 7 16 No
73 Blue Oak 8 10 No
74 Blue Oak 13 24 No
75 Blue Oak 20 40 No
Project 20232542.001A June 2023
Tree
Number Species
Trunk
DBH
(inches)
Estimated
Canopy
Diameter
(feet)
Anticipated Impact (tree removal or encroachment
on CRZ)
76 Blue Oak 11 36 No
77 Blue Oak 9 20 No
78 Blue Oak 12 20 No
79 Blue Oak 10 20 No
80 Blue Oak 10 30 No
81 Blue Oak 15 30 No
82 Blue Oak 26 30 No
83 Blue Oak 22 40 No
84 Blue Oak 24 60 No
85 Blue Oak 28 60 No
86 Blue Oak 17 30 No
87 Blue Oak 15 30 No
88 Blue Oak 16 30 No
89 Blue Oak 13 40 No
90 Blue Oak 7 20 No
91 Blue Oak 14 40 No
92 Blue Oak 27 60 No
93 Blue Oak 33 60 No
94 Interior Live Oak 24 40 No
95 Blue Oak 14 30 No
96 Blue Oak 7 20 No
97 Blue Oak 20 40 No
98 Blue Oak 40 60 No
99 Blue Oak 17 20 No
100 Blue Oak 6 10 No
101 Blue Oak 15 30 No
102 Blue Oak 8 10 No
103 Blue Oak 13 30 No
104 Blue Oak 6 12 No
105 Blue Oak 6 12 No
106 Blue Oak 13 40 No
107 Blue Oak 9 20 No
108 Blue Oak 18 30 No
109 Interior Live Oak 15 30 No
110 Blue Oak 12 12 No
111 Blue Oak 11 12 No
112 Blue Oak 14 20 No
113 Blue Oak 21 50 No
114 Blue Oak 15 30 No
115 Blue Oak 10 30 No
Project 20232542.001A June 2023
Tree
Number Species
Trunk
DBH
(inches)
Estimated
Canopy
Diameter
(feet)
Anticipated Impact (tree removal or encroachment
on CRZ)
116 Blue Oak 29 30 No
117 Blue Oak 27 60 No
118 Blue Oak 16 40 No
119 Blue Oak 10 20 No
120 Blue Oak 19 20 No
121 Blue Oak 20 50 No
122 Blue Oak 14 36 No
123 Blue Oak 13 30 No
124 Interior Live Oak 30 50 No
125 Blue Oak 6 15 No
126 Interior Live Oak 7 15 No
127 Interior Live Oak 13 24 No
128 Interior Live Oak 17 24 No
129 Interior Live Oak 27 50 No
130 Blue Oak 18 50 No
131 Blue Oak 22 50 No
132 Blue Oak 5 8 No
133 Interior Live Oak 12 10 No
134 Blue Oak 45 40 No
135 Blue Oak 15 30 No
136 Blue Oak 17 30 No
137 Blue Oak 10 20 No
138 Blue Oak 9 10 No
139 Blue Oak 7 15 No
140 Blue Oak 8 12 No
141 Blue Oak 18 30 No
142 Interior Live Oak 17 20 No
143 Blue Oak 22 20 No
144 Blue Oak 6 10 No
145 Blue Oak 20 20 No
146 Blue Oak 10 20 No
147 Blue Oak 5 8 No
148 Blue Oak 5 8 No
149 Interior Live Oak 18 30 No
150 Blue Oak 8 18 No
151 Blue Oak 9 10 No
152 Blue Oak 9 12 No
153 Blue Oak 8 8 No
154 Interior Live Oak 15 40 No
155 Interior Live Oak 31 40 No
Project 20232542.001A June 2023
Tree
Number Species
Trunk
DBH
(inches)
Estimated
Canopy
Diameter
(feet)
Anticipated Impact (tree removal or encroachment
on CRZ)
155 Interior Live Oak 10 20 No
157 Blue Oak 14 15 Likely removal ‐ within 10 feet of access road
158 Blue Oak 12 15 Likely removal ‐ within 10 feet of access road
159 Blue Oak 14 20 Likely removal ‐ within access road
160 Blue Oak 8 8 Likely removal ‐ within access road
161 Blue Oak 12 15 Likely removal ‐ within access road
162 Blue Oak 16 30
Possible encroachment on CRZ (tree within 25
feet of access road)
163 Blue Oak 16 30 No
164 Blue Oak 14 20 No
165 Blue Oak 8 8 No
166 Blue Oak 7 6 No
167 Blue Oak 14 20 No
168 Blue Oak 7 10 No
169 Blue Oak 20 40 No
170 Blue Oak 14 30 No
171 Interior Live Oak 10 12 No
172 Interior Live Oak 7 12 No
173 Blue Oak 14 20 No
174 Interior Live Oak 21 50 No
175 Interior Live Oak 12 20 No
175 Blue Oak 29 60 No
177 Interior Live Oak 28 50 No
178 Interior Live Oak 35 40 No
179 Blue Oak 48 60 No
180 Interior Live Oak 24 50 No
181 Blue Oak 12 40 No
182 Blue Oak 33 60 No
183 Interior Live Oak 32 60 No
184 Interior Live Oak 29 60 No
185 Blue Oak 17 40 No
186 Interior Live Oak 18 40 No
187 Blue Oak 9 12 No
188 Blue Oak 19 60 No
189 Interior Live Oak 18 40 No
190 Interior Live Oak 24 60
Possible encroachment on CRZ (security fence
under canopy)
191 Blue Oak 14 25
Possible encroachment on CRZ (security fence
under canopy)
Project 20232542.001A June 2023
Tree
Number Species
Trunk
DBH
(inches)
Estimated
Canopy
Diameter
(feet)
Anticipated Impact (tree removal or encroachment
on CRZ)
192 Blue Oak 16 30
Possible encroachment on CRZ (security fence
under canopy)
193 Interior Live Oak 16 30 No
194 Blue Oak 18 15 No
195 Blue Oak 12 20 No
196 Blue Oak 19 25 No
197 Blue Oak 12 20 No
198 Blue Oak 26 40 No
199 Blue Oak 16 30 No
200 Blue Oak 25 60 No
201 Blue Oak 16 40 No
202 Interior Live Oak 36 50 No
203 Blue Oak 18 25 No
204 Blue Oak 38 60 No
205 Blue Oak 25 60 No
206 Blue Oak 22 50 No
207 Blue Oak 13 30 No
208 Blue Oak 6 10 No
209 Blue Oak 13 18 No
210 Interior Live Oak 45 60 No
211 Interior Live Oak 15 20 No
212 Blue Oak 14 30 No
213 Interior Live Oak 23 40 No
214 Blue Oak 18 60 No
215 Blue Oak 13 20 No
216 Blue Oak 16 40 No
217 Blue Oak 19 60 No
218 Blue Oak 10 12 No
219 Blue Oak 19 30 No
220 Blue Oak 10 20 No
221 Blue Oak 13 12 No
222 Blue Oak 9 12 No
223 Blue Oak 30 60 No
224 Blue Oak 14 40 No
225 Blue Oak 8 16 No
226 Blue Oak 14 25 No
227 Blue Oak 8 14 No
228 Blue Oak 18 30 No
229 Blue Oak 8 10 No
230 Blue Oak 20 40 No
Project 20232542.001A June 2023
Tree
Number Species
Trunk
DBH
(inches)
Estimated
Canopy
Diameter
(feet)
Anticipated Impact (tree removal or encroachment
on CRZ)
231 Blue Oak 10 20 No
232 Blue Oak 6 10 No
233 Blue Oak 13 25 No
234 Blue Oak 18 40 No
235 Blue Oak 10 20 No
236 Blue Oak 8 14 No
237 Blue Oak 24 60 No
238 Blue Oak 17 50 No
239 Blue Oak 12 40 No
240 Blue Oak 13 40 No
241 Blue Oak 14 50 No
242 Blue Oak 7 12 No
243 Blue Oak 21 60 No
244 Blue Oak 8 14 No
245 Blue Oak 11 25 No
246 Blue Oak 13 20 No
247 Blue Oak 24 50 No
248 Blue Oak 10 15
Possible encroachment on CRZ (security fence
under canopy)
249 Blue Oak 26 40 No
250 Blue Oak 14 40 No
251 Blue Oak 23 40 No
252 Blue Oak 15 25 No
253 Interior Live Oak 19 40 No
254 Blue Oak 17 40 No
255 Valley Oak 24 40 No
256 Valley Oak 7 8 No
257 Valley Oak 18 30 No
258 Valley Oak 10 20 No
259 Blue Oak 10 20 No
260 Blue Oak 12 20 No
261 Valley Oak 16 20 No
262 Valley Oak 10 20 No
263 Blue Oak 14 14 No
264 Blue Oak 10 12 No
265 Valley Oak 15 40 No
266 Blue Oak 11 15 No
267 Blue Oak 8 10 No
268 Blue Oak 5 6 No
269 Interior Live Oak 16 10 No
Project 20232542.001A June 2023
Tree
Number Species
Trunk
DBH
(inches)
Estimated
Canopy
Diameter
(feet)
Anticipated Impact (tree removal or encroachment
on CRZ)
270 Valley Oak 17 30 No
271 Blue Oak 7 6 No
272 Blue Oak 8 10 No
273 Blue Oak 8 8 No
274 Valley Oak 12 20 No
275 Blue Oak 6 10 No
276 Blue Oak 10 30 No
277 Blue Oak 8 10 No
278 Blue Oak 8 12 No
279 Blue Oak 6 10 No
280 Valley Oak 14 30 No
281 Blue Oak 6 8 No
282 Blue Oak 6 8 No
283 Valley Oak 16 30 No
284 Valley Oak 6 8 No
285 Blue Oak 8 12 No
286 Blue Oak 12 14 No
287 Blue Oak 22 20 No
288 Valley Oak 9 14 No
289 Blue Oak 12 18 No
290 Blue Oak 15 16 No
291 Blue Oak 20 30 No
292 Blue Oak 21 40 No
293 Blue Oak 12 20 No
294 Blue Oak 12 14 No
295 Blue Oak 9 8 No
296 Blue Oak 10 18 No
297 Blue Oak 10 10 No
298 Blue Oak 14 30 No
299 Blue Oak 14 40 No
300 Blue Oak 12 30 No
301 Blue Oak 9 20 No
302 Blue Oak 14 40 No