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variety of growing conditions and can out-compete native plant populations for available nutrients,
prime growing locations, and other resources. They may hybridize with native species, thereby
impacting the genetic integrity of the native species. Because these plants reproduce so quickly
and in such large amounts, they can quickly replace many native plant populations, resulting in
lower species diversity, low of areas suitable for breeding and/or nesting by wildlife species,
changes in riparian ecosystems, and overall reduction in habitat functions and values.
This impact would be considered potentially significant. Implementation of MM 11 would reduce
this impact to less than significant.
4.3.4 Night
Lighting
Night lighting may impact the behavioral patterns of nocturnal and crepuscular (i.e., active at dawn
and dusk) wildlife adjacent to night lighting. Of greatest concern is the effect on small,
ground-dwelling animals that use the darkness to hide from predators and bats, owls, and
mountain lion, which are specialized night foragers.
Construction activities would not involve night work and, therefore, would not impact nocturnal
and crepuscular wildlife species. While there is existing development (including lighting of
homeowners’ backyards and landscaping) in the BSA, future projects may include the installation
of additional lighting that could negatively impact nocturnal and crepuscular wildlife species within
the lots as well as in the surrounding adjacent open space.
Implementation of MM 12 would
reduce this impact to less than significant.
4.3.5 Bird
Strikes
A potential long-term, operational impact associated with installation of large areas of glass (e.g.,
infinity edge pools, wind screens) concerns bird strike mortality and injury.
Ornithologists estimate
that up to a billion birds are killed or injured annually by collisions with clear and reflective sheet
glass and plastic (Klem 2009). It is thought that they cannot distinguish between the reflection on
the glass/plastic surface and the natural landscape. Installation of structures with glass surfaces
have the potential to result in bird strikes given the proximity to natural open space areas. The
potential loss of a federally-listed species due to bird strikes is potentially significant.
Implementation of MM 13 would ensure that potential impacts are less than significant.
4.3.6 Human
Activity
Given the developed nature of the BSA, individual homeowner projects are not expected to
increase human activity. Therefore, there would be no long-term impact, and no mitigation would
be required. During construction, there would be a slight increase in human activity within one lot at a time.
This would incrementally increase the disturbance of the natural open space immediately adjacent
to the construction areas. This increased activity could potentially disrupt foraging, nesting,
roosting, and/or denning activities for a variety of wildlife species. Increased human activity could
deter wildlife from using habitat adjacent to construction. This impact would be highly localized
and relatively short-term in nature; wildlife would be expected to disperse to adjacent open space.
Therefore, this impact would be considered adverse, but less than significant, and no mitigation
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4.4 MITIGATION
MEASURES
This section focuses on the development of MMs for those impacts of the Project found to be
significant or potentially significant. Strategies to mitigate each impact to a less than significant
level are identified and described in the following section. 4.4.1 Mitigation Measure 1: Environmentally Sensitive Areas
Avoidance. Impacts on sensitive natural communities (i.e., coast prickly pear scrub, California
walnut groves, and California walnut groves [disturbed]), jurisdictional features, Threatened and
Endangered and CRPR 1B and 2B plant locations shall be avoided or minimized to the extent
practicable during Project design. While not required, it is recommended that other coastal sage
scrub and coast live oak woodland communities and CRPR 3 and 4 locations also be avoided to
the extent practicable. Project plans shall be submitted to the City demonstrating that sensitive
natural communities, jurisdictional features, special status plant locations, and other native
vegetation types have been avoided to the extent practicable. If any sensitive natural
communities, jurisdictional features, special status plant locations, or other native vegetation
types are located within 500 feet of the project, they will be shown on project plans and labeled
Environmentally Sensitive Areas. If the sensitive natural communities, jurisdictional features,
special status plant locations, or other native vegetation types are located within 200 feet, the
plans shall include a note with the information below with regard to “Protection” of these
resources.
Protection. If a future homeowner project involves vegetation clearing and/or the use of
mechanized equipment, and the lot has sensitive habitats (i.e., coast prickly pear scrub, California
walnut groves, and California walnut groves [disturbed]), jurisdictional features, or Threatened
and Endangered and CRPR 1B or 2B plant locations within 200 feet of the project limits, the limits
shall be marked prior to the initiation of project activities. While not required, it is recommended
that this protection also be implemented if other native vegetation types (i.e., coastal sage scrub
and coast live oak woodland) or CRPR 3 or 4 plant locations are present within 200 feet of project
limits. Sensitive natural communities, jurisdictional features, special status plant locations, as well
as other native vegetation types (i.e., Environmentally Sensitive Areas), outside the limits shall be
avoided during project activities. No equipment, spoils piles, materials storage, or other
disturbance shall occur within sensitive natural communities, jurisdictional features, special status
plant locations or other native vegetation types (i.e., Environmentally Sensitive Areas).
4.4.2 Mitigation Measure 2:
Protected Trees
Removal of mature significant trees protected by the City of San Dimas Municipal Code shall be
avoided to the extent practicable. Mature significant trees may include native or non-native
species in developed or undeveloped areas, if they meet the size requirement for a mature
significant tree under the City’s code. Prior to removal of mature significant trees, homeowners
shall follow the procedures for tree removal described in San Dimas Municipal Code 18.162 (see
https://file.lacounty.gov/SDSInter/acwm/216023_SanDimasMC.pdf, Chapter
18.162: Tree
Preservation). This Code requires that a tree inventory be prepared by a Certified Arborist to map
trees on the property. If determined necessary through the City’s review process, conditions for
removal of a mature significant tree may include tree replacement at a 2:1 ratio with a minimum
15-gallon box tree(s), or other replacement of equivalent value and size, within the subject
property. No grading or building permits shall be issued and no mature significant trees shall be
removed until approved as described in San Dimas Municipal Code 18.162.
San Dimas Municipal
Code 18.162 also requires protection of existing mature significant trees during project activities
and prohibits topping and/or excessive pruning of a mature significant tree that would result in
significant damage to the tree to the point that it may limit future growth, as determined by a
Certified Arborist.
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To assist homeowners in the BSA, the Home Owner’s Association (HOA) could retain a Certified
Arborist to prepare a Native Tree Inventory for the entire BSA. Following the preparation of the
Native Tree Inventory, a map overlay could be made showing native trees to be avoided in order
to avoid the need for tree permitting. The preparation of a single Native Tree Inventory throughout
the BSA would provide an efficiency of scale that would be more cost-effective than the
preparation of individual tree surveys by lot.
4.4.3 Mitigation Measure 3: Jurisdictional
Permitting
If the project activities would occur within 200 feet of a potential drainage, including potential
jurisdictional features shown on Figure 7, or other topographic features that may comprise a bed,
bank, or channel, a formal Jurisdictional Delineation shall be prepared by a qualified Regulatory
Specialist. The project shall follow avoidance and protective measures described under MM 1.
To assist homeowners in the BSA, the HOA could retain a Regulatory Specialist to prepare a
Jurisdictional Delineation for the entire BSA. This would identify jurisdictional features and
associated regulatory authority for each lot. Following the preparation of the Jurisdictional
Delineation, a map overlay could be made showing jurisdictional features to be avoided in order
to avoid the need for further regulatory permitting. The preparation of a single Jurisdictional
Delineation throughout the BSA would provide an efficiency of scale that would be more costeffective than the preparation of individual Jurisdictional Delineations by lot. However, the
Jurisdictional Delineation may need to be periodically updated if regulatory requirements change
over time.
If project activities would impact features under the jurisdiction of the USACE (if applicable),
CDFW, and/or RWQCB, the homeowner shall obtain all necessary permits for impacts to
jurisdictional areas. Potential mitigation options shall include payment of an in-lieu mitigation fee
to an approved mitigation bank; long-term preservation of existing jurisdictional habitat at an onsite or off-site location; or another strategy as approved by the USACE, CDFW, and/or RWQCB.
Jurisdictional areas shall be replaced at a minimum 1:1 ratio, or as otherwise determined by the
resource agencies during permitting. The appropriate jurisdictional permits must be obtained and
mitigation must be secured (i.e., in-lieu mitigation fee paid or demonstration of long-term
preservation has been obtained) prior to issuance of a grading or building permit.
4.4.4 Mitigation Measure 4: Nesting
Birds/Raptors
To the extent possible, vegetation clearing shall be conducted during the non-breeding season
(i.e., September 16 to January 31) in order to minimize impacts on nesting birds. If vegetation
clearing would be initiated during the breeding season for nesting birds/raptors (i.e., February 1–
September 15), the construction activity shall be conducted in compliance with the Migratory Bird
Treaty Act and/or Sections 3503, 3503.5, and 3513 of the California Fish and Game Code.
In order to avoid direct impacts on active nests, a pre-construction survey shall be conducted by
a qualified Biologist (one with experience conducting nesting bird surveys) for nesting birds and/or
raptors within three days prior to vegetation clearing or initiation of project activities. The nesting
bird survey area shall include a buffer of 100 feet around the work area for nesting birds and a
buffer of 500 feet around the work area for nesting raptors and coastal California gnatcatcher (if
there is coastal sage scrub). If the Biologist does not find any active nests within or immediately
adjacent to the impact area, the vegetation clearing/construction activities shall be allowed to
proceed.
If the Biologist finds an active nest within or immediately adjacent to the construction area and
determines that the nest may be impacted, or breeding activities substantially disrupted, the
Biologist shall determine an appropriate protective buffer zone around the nest depending on the
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sensitivity of the species and the nature of the construction activity. The protective buffer shall be
25–100 feet for nesting birds and 200–500 feet for special status bird species or nesting raptors.
The active nest shall be protected until nesting activity has ended as determined by a qualified
Biologist (i.e., nestlings have fledged or the nest has failed). Encroachment into the protective
buffer around a known nest shall only be allowed if the Biologist determines that the proposed
activity would not disturb the nest occupants.
4.4.5 Mitigation Measure 5: Special Status
Plant Species
Prior to removal of vegetation (including coastal sage scrub, native woodland, non-native
woodland, or non-native herbaceous vegetation types) for projects requiring a City permit, the
homeowner shall retain a qualified Botanist to conducted focused surveys for special status plant
species within the proposed impact area. The survey shall be performed during the target species’
peak blooming period in accordance with the most current protocols approved by CDFW and
CNPS. Because blooming periods overlap, generally one early spring (i.e., March/April) and one
late spring/early summer (May/June) survey can be conducted to cover all target species. The
peak blooming time varies based on the rainfall of the year.
To assist homeowners in the BSA, the HOA could retain a qualified Biologist to conduct a special
status plant survey for the entire BSA during a year of adequate rainfall. This would identify special
status plant locations for each lot. Following the survey, a map overlay could be made showing
special status plant locations to be avoided in order to avoid the need for further mitigation. The
preparation of a single special status plant survey throughout the BSA would provide an efficiency
of scale that would be more cost-effective than the preparation of individual special status plant
surveys by lot.
If no special status plant species are located within 200 feet of project activities, no further
measures would be required.
If there is a special status plant location present, but it would not be impacted, avoidance and
protective measures described under MM 1 shall be followed.
If a special status plant location is observed within the project impact area, the qualified Biologist
conducting the survey shall evaluate the significance with respect to the number of individuals
that would be impacted and the status of the species. If Nevin’s barberry or thread-leaved brodiaea are observed in the impact area and cannot
be avoided, any impact on these species shall be considered significant.
Prior to impacting
individuals of either species, approval shall be required from both the USFWS and CDFW.
One of the following mitigation options shall be required: (1) payment of an in-lieu
mitigation fee to an approved mitigation bank with credits for the subject species; or (2)
preparation of a Special Status Plant Translocation Plan. If translocation is selected, a
qualified Restoration Biologist shall be retained to prepare a Special Status Plant Species
Translocation Plan for approval by the USFWS and CDFW. The Special Status Plant
Translocation Plan shall include the following topics: (1) responsibilities and qualifications
of the personnel to implement and supervise the plant, (2) mitigation site selection criteria,
(3) methods for seed/bulb/corm or individual collection; (4) site preparation and planting
implementation, (5) implementation schedule, (6) maintenance plan/guidelines, (7)
monitoring plan, and (8) long-term preservation. If seeds/bulbs/corms or individuals will be
collected as part of the mitigation strategy, a qualified Restoration Biologist/Seed Collector
shall collect seed/bulbs/corms or individuals for translocation and shall store them in
appropriate conditions to maintain the viability of the seed.
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If plants with a CRPR of 1B or 2B are observed in the impact area and cannot be avoided,
the determination of significance will be based on the size of the impacted population
relative to the regional population size. The regional population size will be determined
based on the current total population sizes (excluding occurrences considered extirpated)
of CNDDB and CCH records from the USGS Baldwin Park, San Dimas, Ontario, La Habra,
Yorba Linda, Prado Dam, Azusa, Glendora, and Mt. Baldy 7.5-minute quadrangles. If the
impacted population of CRPR 1B or 2B species represents less than five percent of the
regional population, the impact will be considered less than significant and no mitigation
will be required. If the impacted population of CRPR 1B or 2B species represents five
percent or more of the regional population, compensatory mitigation shall be required.
One of the following mitigation options shall be required: (1) payment of an in-lieu
mitigation fee to an approved mitigation bank with credits for the subject species; (2)
collection of seeds/bulbs/corms or individuals by a qualified Seed Collector and donation
to the California Botanic Garden for their use; or (3) preparation of a Special Status Plant
Translocation Plan. If translocation is selected, a qualified Restoration Biologist shall be
retained to prepare a Special Status Plant Species Translocation Plan for approval by the
City. The Special Status Plant Translocation Plan shall include the following topics: (1)
responsibilities and qualifications of the personnel to implement and supervise the plant,
(2) mitigation site selection criteria, (3) methods for seed/bulb/corm or individual collection;
(4) site preparation and planting implementation, (5)
implementation schedule, (6)
maintenance plan/guidelines, (7) monitoring plan, and (8) longterm preservation. If seeds/bulbs/corms or individuals will be collected as part of the mitigation strategy, a
qualified Restoration Biologist/Seed Collector shall collect seed/bulbs/corms or individuals
for translocation and shall store them in appropriate conditions to maintain the viability of
the seed.
If plants with a CRPR of 3 or 4 are observed in the impact area and cannot be avoided,
the impact shall be considered less than significant and no further measures shall be
required. However, it should be noted that any Southern California black walnut
(CRPR 4.2) meeting the definition of a mature significant tree shall be subject to the
requirements of MM 2.
4.4.6 Mitigation Measure 6: Crotch
Bumble Bee
If CDFW determines that listing of the Crotch bumble bee is not warranted prior to or during
implementation of the project activities, this measure shall not be required.
Until CDFW makes a determination, or if CDFW determines that listing of the Crotch bumble bee
is warranted, the following measure shall be required.
Prior to vegetation clearing or grading, homeowners requiring grading permits shall retain a
qualified Biologist to conduct pre-construction focused surveys for Crotch bumble bee within 100
feet of Project impact areas. The survey shall be performed during the appropriate window for
this species (i.e., March to July). Three visual surveys will be conducted by a qualified Biologist.
Surveys shall be conducted at least two hours after sunrise and three hours before sunset during
suitable weather conditions. Sunny days with temperatures greater than 60 degrees Fahrenheit
and wind speeds less than 8 mph are optimal, but partially cloudy days or overcast conditions are
permissible if a person’s shadow is visible. Surveys shall not be conducted during wet, foggy, or
rainy conditions. Meandering transects shall be walked slowly within the Project survey area to
obtain a 100% survey cover. Transect spacing will depend on the habitat. The Biologist will search
for Crotch’s bumble bee activity and the presence of ground nests.
Cavities such as mammal
burrows shall be inspected with binoculars for evidence of bumble bee use. If multiple
exiting/entering bumble bees are observed at a cavity, further observation shall occur until nesting
is confirmed (e.g. multiple individuals entering the cavity).
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If no Crotch bumble bee are observed, no further action will be required within the year that the
focused survey is conducted. Because Crotch bumble bee moves ground nests annually, the
pre-construction focused survey shall be repeated if construction does not begin before the spring
(i.e., March 1) following the previous focused survey.
If Crotch bumble bee is present, the Project Applicant shall consult with CDFW to determine if a
permit (2081) will be needed. If a ground nest is observed, it shall be protected in place until it is
no longer active as determined by a Biologist. An initial protective buffer of at least 100 feet shall
be established around the active ground nest until CDFW can be consulted.
A qualified Biologist
shall determine the protective buffer distance needed depending on the location with respect to
construction activities and the type of construction activities occurring; CDFW shall approve the
protective buffer distance needed.
A Letter Report shall be prepared to document the results of the preconstruction surveys and shall be provided to CDFW within 30 days of completion of the survey.
4.4.7 Mitigation Measure 7: Coastal California
Gnatcatcher
Prior to vegetation clearing or construction, homeowners with projects that would impact coastal
sage scrub shall retain a qualified Biologist with the appropriate permit to conduct focused surveys
for coastal California gnatcatcher within 500 feet of Project impact areas.
The survey shall be
performed in accordance with the most current protocols approved by the USFWS.
To assist homeowners in the BSA, the HOA could retain a qualified Biologist to conduct a focused
coastal California gnatcatcher survey for the entire BSA. Following the survey, a map overlay
could be made showing occupied habitat to be avoided in order to avoid the need for further
mitigation. Conducting a focused coastal California gnatcatcher survey throughout the BSA would
provide an efficiency of scale that would be more cost-effective than the preparation of individual
surveys by lot.
If coastal California gnatcatchers are not observed within 500 feet of the project impact area, no
further measures would be needed.
If coastal California gnatcatchers are observed within 500 feet of the project impact area, then
impacts on coastal sage scrub should be avoided or minimized to the extent practicable. If
avoidance of coastal sage scrub is not feasible, then consultation with the USFWS (Section 7 or
Section 10) shall be required to determine the appropriate mitigation required prior to removal of
coastal sage scrub. Potential mitigation options shall include payment of an in-lieu mitigation fee
to an approved mitigation bank; long-term preservation of existing coastal sage scrub habitat
occupied by coastal California gnatcatcher at an on-site or off-site location; or another strategy
as approved by the USFWS. Coastal sage scrub shall be replaced at a minimum 1:1 ratio, or as
otherwise determined by the USFWS. The USFWS approval (under Section 7 or 10 of the FESA)
must be obtained and mitigation must be secured (i.e., in-lieu mitigation fee paid or demonstration
of long-term preservation has been obtained) prior to issuance of a grading permit.
4.4.8 Mitigation Measure 8
Burrowing Owl
Per the Staff Report on Burrowing Owl Mitigation (CDFW 2012), the homeowner shall retain a
qualified Biologist to conduct a pre-construction survey for the burrowing owl no less than 14 days
prior to any ground disturbance by the Project and no greater than 30 days prior to ground
disturbance in each Project area (year-round). The pre-construction survey shall include the area
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If an active burrow is observed outside the breeding season (i.e., September 1 to January 31)
and it cannot be avoided, the burrowing owl shall be passively excluded from the burrow following
methods described in CDFW guidelines. One-way doors shall be used to exclude owls from the
burrows; doors shall be left in place for at least 48 hours. Once the burrow is determined to be
unoccupied, the burrow shall be closed by a qualified Biologist who shall excavate the burrow
using hand tools.
If an active burrow is observed outside the breeding season (i.e., September 1 to January 31)
and it can be avoided, the Biologist shall determine an appropriate protective buffer for the burrow.
The designated protective buffer will be clearly marked in the field and mapped as an
Environmentally Sensitive Area on construction plans.
If an active burrow is observed during the breeding season (February 1 to August 31), the active
burrow shall be protected until nesting activity has ended (i.e., all young have fledged from the
burrow). The Biologist shall determine the appropriate protective buffer for the burrow (minimum
300 to 500 feet) based on the sensitivity of the individuals and the type of construction activities.
The designated protective buffer will be clearly marked in the field and mapped as an
Environmentally Sensitive Area on construction plans.
Upon completion of the pre-construction burrowing owl survey, a Letter Report shall be prepared
and submitted to CDFW documenting the results of the survey within two weeks of completion of
the survey effort. If an active burrow is observed, the Letter Report shall include a description of
the protective buffer that has been designated.
4.4.9 Mitigation Measure 9:
Roosting Bats
The bats with potential to roost in the BSA (i.e., western red bat and western mastiff bat) roost in
trees. If native or non-native trees are proposed for removal, then either tree removal shall be
conducted between September and November (to avoid the bat maternity and the bat hibernation
season), or the tree removal will occur under the supervision of a qualified Biologist and will utilize
phased tree trimming. First, branches are removed from the trees; lowered to the ground as gently
as possible; and left overnight on the ground to allow bats to escape. After they have been left
overnight for at least one night, the branches can be chipped and/or removed from the site. The
day after branches are cut from the tree, the tree trunk can be cut; lowered to the ground as gently
as possible; and left overnight on the ground to allow bats to escape. After the trunk has been left
overnight for at least one night, the trunk can be cut into pieces, chipped, and/or removed from
the site.
4.4.10 Mitigation Measure 10:
Water Quality
The following Best Management Practices (BMPs) shall be used during construction activities:
Erosion control measures shall be used to minimize erosion (e.g., temporary installation
of silt fences, straw wattles, fiber rolls, gravel bags, etc.).
Wattles used for erosion control shall be biodegradable and certified as weed-free.
Spoils shall be stockpiled in disturbed areas lacking native vegetation. Construction vehicles shall be washed prior to delivery to the site to prevent weed seeds
from entering the construction area. Track-clean or other methods of vehicle cleaning shall
be used by the construction contractor to prevent weed seeds from entering/exiting the
site on vehicles.
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Fueling and equipment maintenance shall occur on existing streets or other developed
areas. No equipment maintenance shall occur within or adjacent to drainages or native
vegetation. Contractor equipment shall be checked for leaks prior to operation and
repaired as necessary.
Any spilled hazardous materials shall be immediately cleaned and hazardous materials
properly disposed of. All trash and debris shall be picked up and removed from the site at the end of each
workday. All work shall be conducted during daylight
hours only.
Trenches and excavations shall be covered at the end of each work day or a wood plank shall be
placed from the bottom of the trench to the ground level to allow wildlife to escape from the
trench/excavation. 4.4.11 Mitigation Measure 11: Invasive Species
Landscaping designs shall be submitted to the City for review to ensure that no invasive, exotic
plant species are used in proposed landscaping (i.e., those listed on the California Invasive Plant
Council’s Invasive Plant Inventory with a Risk Rating of “High” [Cal-IPC 2023]). The review may
be conducted by City staff or a qualified Biologist. If a qualified Biologist conducts the review,
suitable substitutes should be suggested for any plants not allowed.
4.4.12 Mitigation Measure 12: Night
Lighting
Lighting plans shall be submitted to the City for review to ensure that night lighting is focused
within the usable backyard space and does not shine into adjacent habitat areas to the extent
practicable. Exterior lighting adjacent to natural open space shall be diffused, shielded, and low
intensity and located so that direct rays are confined to the developed areas.
4.4.13 Mitigation Measure 13: Bird
Strikes
If landscaping or improvements includes installation of glass walls in outdoor areas within 200
feet of coastal sage scrub or native woodlands, landscaping plans shall demonstrates that
window/glass used are designed to minimize bird strikes. This may include measures such as
angling of windows/glass downward so that the windows reflect the ground instead of the
surrounding habitat or sky or the use of bird-safe glass that exhibits the “2×4 Rule”, as defined by
the American Bird Conservancy. The 2 X 4 Rule describes the distance between elements making
up a pattern applied to windows for the purpose of preventing bird strikes.
To be effective, the
pattern must uniformly cover the entire window and consist of elements of any shape (e.g., lines,
dots, other geometric figures) separated by no more than 2 inches if oriented in horizontal rows,
or 4 inches if oriented in vertical columns (i.e., the 2 X 4 Rule). These patterns reduce bird-window
collisions when applied to the outer surface of reflective panes. Greater spacing between pattern
elements increases the risk of a strike and casualties. Bird-safe glass may include a uniformly
dense dot, striped, or grid pattern created as ceramic frit on the external surface of the window or
a uniformly dense dot, striped, or grid patterns of clear UV-reflecting and UV-absorbing film
applied to the exterior of windows. Opaque glass can also be used. It should be noted that single
decals (e.g., falcon silhouettes or large eye patterns) are ineffective and shall not be used unless
the entire glass surface is uniformly covered with the objects or patterns (Klem 1990).
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5.0 LEVEL OF SIGNIFICANCE AFTER
MITIGATION
Implementation of the recommended measures will mitigate biological impacts to a level that is
considered less than significant.
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6.0 REFERENCE
S
American Ornithological Society (AOS). 2023 (July 11). Check-list of North and Middle American
Birds (7th ed., as revised through 64th Supplement).
Washington, D.C.: AOU.
Atwood, J.L. 1992. Rare, Local, Little-Known, and Declining North American https://checklist.americanornithology.org/.
Breeders – A Closer
Look. Birding 25: 228–233.
Atwood, J.L. 1990. Status Review of the California Gnatcatcher (Polioptila californica). Manomet Bird Observatory, Manomet,
MA.
Baker, R. O, & Timm, R. M., (1998). Management of conflicts between urban coyotes and
humans in Southern California. Proceedings of the Vertebrate Pest Conference, 18.
http://dx.doi.org/10.5070/V418110164 Retrieved from
https://escholarship.org/uc/item/5064c
0n7.
Baldwin, B.G., D.J. Keil, R. Patterson, T.J. Rosatti, and D.H. Wilken (Eds.). 2012. The Jepson
Manual: Vascular Plants of California (Second ed.). Berkeley, CA:
University of California
Bennett, A.F. 1990. Habitat Corridors and the Conservation of Small Mammals Press. in the Fragmented
Forest Environment. Landscape Ecology 4(2–3):109–122. New York, NY: International
California Department of Fish and Wildlife (CDFW). 2023a (June 12, date Association for Landscape Ecology. accessed). California
Natural Diversity Database. Records of Occurrence for the USGS Black Star Canyon,
Orange, Tustin, and El Toro 7.5-minute quadrangles. Sacramento, CA: CDFW, Natural
Heritage Division.
———. 2023b (April). Special Animals List. Sacramento, CA: CDFW, Natural Heritage Division. https://nrm.dfg.ca.gov/FileHandler.ashx?DocumentID=10940 6&inline.
———. 2023c (April). Special Vascular Plants, Bryophytes, and Lichens List. Sacramento, CA: CDFW, Natural Heritage Division.
https://nrm.dfg.ca.gov/FileHandler.ashx?DocumentID=10938 3&inline.
———. 2023d (June 1). California Natural Communities List. Natural Communities List Arranged
Alphabetically by Life Form (PDF). Sacramento, CA: CDFW Biogeographic Data Branch. ———. 2023e (June 17, date accessed). Bald Eagles in California. California https://nrm.dfg.ca.gov/FileHandler.ashx?DocumentID=153398&inline. Department of Fish and Wildlife. http://wildlife.ca.gov/Conservation/Birds/Bald-Eagle ———. 2023f (June 12, date accessed). Petitions to List Species Under the California
Endangered Species Act, Petitions, Notices and Documents, Mountain Lion. California
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program). Life History Accounts for Species in Table 8.
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Star Canyon, Orange, Tustin, and El Toro 7.5-minute quadrangles.
Sacramento, CA:
CNPS. http://www.rareplants.cnps.org/.
———. 2023b (June 12, date accessed). A Manual of California Vegetation, Online Edition.
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Southern California/Central
Coast Evolutionarily Significant Unit (ESU) of Mountain Lions as Threatened under the
California Endangered Species Act (CESA). Oakland, CA: Center for Biological Diversity.
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City of San Dimas. 2022. San Dimas, California Municipal Code Title 18 Zoning, Chapter 18.518
Specific Plan No. 11.
———. 1991. San Dimas, General Plan.
https://sandimasca.gov/departments/community_development/planning_divis ion/general
_plan/general_plan_sections.php.
Consortium of California Herbaria (CCH). 2023. Consortium of California Herbaria. Data provided
by the participants of the Consortium of California Herbaria. Berkeley, CA: University of
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Reptiles of North America North of Mexico, with Comments Regarding Confidence in Our
Understanding. Society for the Study of Amphibians and Reptiles Herpetological Circular
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Dechant, J.A., M.L. Sondreal, D.H. Johnson, L.D. Igl, C.M. Goldade, P.A.
Rabie, and B.R. Euliss.
2003. Effects of Management Practices on Grassland Birds: Burrowing Owl. Jamestown,
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resource/literatr/grasbird/buow/buow.htm.
England, A.S., M.J. Bechard, and C.S. Houston. 1997. Swainson’s Hawk (Buteo swainsoni). In
The Birds of North America, No. 265 (A. Poole and F. Gill, eds.). The Academy of Natural
Sciences, Philadelphia, PA and The American Ornithologists’ Union, Washington, D.C.
Faber-Langendoen, D., L. Master, J. Nichols, K. Snow, A. Tomaino, R.
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B. Heidel, L. Ramsay, and B. Young. 2012 (June). NatureServe Conservation Status
Assessments: Methodology for Assigning Ranks (Revised
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Fahrig, L. and G. Merriam. 1985. Habitat Patch Connectivity and Population Survival. Ecology 66(6): 1762–1768. Tempe, AZ: Ecological Society of America.
Grubbs, Shannon E., and Paul R. Kraussman, 2009. Use of urban landscape by coyotes. The
Southwestern Naturalist 54(1):1–12. March 2009.
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Harris, L.D. and P.B. Gallagher. 1989. New Initiatives for Wildlife Conservation: The Need for
Movement Corridors (pp. 11–34). Preserving Communities and Corridors (G. Mackintosh,
Haug, E.A., B.A. Millsap, and M.S. Martell. 1993. Burrowing Owl (Speotyto Ed.). Washington, D.C.: Defenders of Wildlife. cunicularia). In The
Birds of North America, No. 61 (A. Poole and F. Gill, eds.). Philadelphia:
The Academy of
Natural Sciences; Washington, D.C.: The American Ornithologists’ Union, Washington,
D.C.
Holland, R.F., 1986. Preliminary Descriptions of the Terrestrial Natural Communities of California.
State of California, The Resources Agency, Nongame Heritage Program, California
Jepson Flora Project. 2023 (December 23, 2022, Revision 11). Jepson Department of Fish & Game, Sacramento, Calif. 156 pp. eFlora (Taxonomy for
common species in the Plant Compendium). Berkeley, CA: The Jepson Herbarium.
Klem, D. 2009. Preventing Bird-window Collisions. The Wilson http://ucjeps.berkeley.edu/eflora/.
Journal of Ornithology
121(2):314–321. Albuquerque, NM: University of New Mexico Larson, Rachel N., Justin
L. Brown, Tim Karels, and Seth P,D. Riley, 2020. Effects of urbanization on resource use
and individual specialization in coyotes (Canis latrans) in southern California. PLoS ONE
15(2): e0228881. https://doi.org/10.1371/journal.pone.0228881.
MacArthur, R.H. and E.O. Wilson. 1967. The Theory of Island Biogeography. Princeton, NJ: Princeton University
Press.
Ng et al. 2004. Ng, Sandra J., Jim W. Dole, Raymond M. Sauvajot, Seth P.D.
Riley, and Thomas
J. Valone, 2003. Use of highway undercrossings by wildlife in southern California.
Noss, R.F. 1983. A Regional Landscape Approach to Maintain Diversity. Biological Conservation 115 (2004) 499–507.
BioScience. 33(11): 700–706. Washington, D.C.: American Institute of Biological Sciences.
Noss, R.F. and R.L. Peters. 1995. Endangered Ecosystems: a Status Report on America’s
Vanishing Habitat and Wildlife. Washington, D.C.: Defenders of Quinn, R.D. 1989. The Status of Walnut Forests and Woodlands (Juglans Wildlife. californica) in Southern
California. Pomona, CA: California State Polytechnic University.
Remsen, J.V., Jr. 1978.
Bird Species of Special Concern in California: An Annotated List of Declining or Vulnerable
Bird Species (Administrative Report No. 78-1). Sacramento, CA:
CDFG, Wildlife
Management Branch.
Ruben, J.A. and W.J. Hillenius. 2005 (May). Cold Blooded. Natural History. New York, NY: American Museum of Natural
History.
Sawyer, J.O., T. Keeler-Wolf, J.M. Evens. 2009. A Manual of California Vegetation, Second
Edition. California Native Plant Society Press. Sacramento, CA.
Schoenherr, A.A. 1992. A Natural History of California. Berkeley, CA:
University of California
Press.
Simberloff, D. and J. Cox. 1987. Consequences and Costs of Conservation Corridors.
Conservation Biology 1(1): 63–71. Boston, MA: Blackwell Scientific Publications.
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(20-0005)
Smithsonian National Museum of Natural History (SNMNH). 2011. Mammal Species of the World
(3rd ed.) (a database based on Wilson, D.E., and D.M. Reeder’s 2005 publication entitled
Mammal Species of the World, A Taxonomic and Geographic Reference, 3rd ed.).
Washington, D.C.: SNMNH.
https://www.departments.bucknell.edu/biology/resources
/msw3/.
Soule, M.E. 1987. Viable Populations for Conservation. New York, NY:
Cambridge University Press.
State Water Resources Control Board (SWRCB).- (2023) Municipal Stormwater Program. https://www.waterboards.ca.gov/water_issues/programs/stormwater/mun icipal.html
_____. 2021. State Water Resources Control Board Resolution No. 2021- 0012. Confirmation that
the “State Wetland Definition and Procedures for Discharges of Dredged or Fill Material
to Waters of the State” (1) Are in Effect as State Policy for Water Quality Control for all
Waters of the State and (2) Shall be Applied Via the Inland Surface Waters and Enclosed
Bays and Estuaries Plan to Only Waters of the State.
Sacramento, CA: SWRCB.
https://www.waterboards.ca.gov/water_issues/programs/cwa401/docs/wrapp/r s2021_00
12.pdf.
_____. 2019 (April 2). State Wetland Definition and Procedures for Discharges of Dredged or Fill Material to Waters of the State. https://www.waterboards.ca.gov/water_issues/programs/cwa401/docs/procedu res_confo
rmed.pdf.
Tietje et al. 2005. Oak Woodlands as Wildlife Habitat. A Planner’s Guide for Oak Woodlands, Second Edition. Davis, CA: University of California. https://anrcatalog.ucanr.edu/pdf/3491E
.pdf.
Ultrasystems. 2022. Biological Resources Evaluation Report for the San Dimas Municipal Code
Text Amendment 20-0005, City of San Dimas, Los Angeles County, California. Irvine, CA:
Unitt, P. 1984. The Birds of San Diego County. San Diego Society of Natural Ultrasystems.
History, Memoir 13, San Diego,
CA.
U.S. Army Corps of Engineers and Environmental Protection Agency (USACE and USEPA).
2023a (January 18). Revised Definition of “Waters of the United States”.
Federal Register
———. 2023b (September 8). Revised Definition of “Waters of the United 88(11):3004–3144. Washington, D.C.: USACE and USEPA.
States”; Conforming. Federal Register 88(173):61964–61969. Washington, D.C.:
USACE and USEPA.
U.S. Department of Agriculture, Natural Resources Conservation Service (USDA NRCS). 2022
(November 1, date accessed). State Soil Data Access Hydric Soils List.
Washington, D.C.:
USDA, NRCS.
http://www.nrcs.usda.gov/wps/portal/nrcs/main/soils/use/hydric/.
U.S. Department of Agriculture, U.S. Forest Service (USDA USFS). 2023 (June 17, date
accessed). Put on Your Eagle Eyes! It’s Time to Count Eagles! San Bernardino National
Forest. San Bernardino, CA. https://www.fs.usda.gov/detail/sbnf/n events/?cid=STELPRDB54084 ews73.
U.S. Environmental Protection Agency (USEPA). 2022a. EPA Waters Geo Viewer.
epa.gov/waterdata/waters-geoviewer.
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86 Biological Technical
Report
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(20-0005)
_____. 2017 (January 17, last update). Climate Change.
Washington, D.C.: USEPA.
https://19january2017snapshot.epa.gov/climatechange/climate-change-basicinformation_.html.
U.S. Fish and Wildlife Service. 2023a. General Provisions; Revised List of Migratory Birds. Federal Register 88: 49310.
https://www.federalregister.gov/documents/2023/07/31/2023-15551/generalprovisionsrevised-list-of-migratory-birds. _____. 2023b.. Wetlands Mapper [Information for the BSA]. Washington D.C.: USFWS, National
Wetlands Inventory. http://www.fws.gov/wetlands/ Data/Mapper.html. _____. 2023c (June 17, date accessed). Monarch butterfly (Danaus plexippus). Environmental Conservation Online System.
https://ecos.fws.gov/ecp/species/9743#lifeHistory.
———.2007 (December 19). Endangered and Threatened Wildlife and Plants; Revised
Designation of Critical Habitat for the Coastal California Gnatcatcher (Polioptila californica
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USFWS. United States Forest Service (USFS). 2018. Pacific Southwest Region, Climate Change.
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America: An Identification guide. Princeton University Press, Princeton. Xerces Society. 2023 (October 1, date accessed). Western Monarch Count.
Xerces Society for
Invertebrate Conservation. https://www.westernmonarchcount.org. ———. 2016 (June). State of the Monarch Butterfly Overwintering Sites in California. Prepared
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https://www.xerces.org/sites/default/files/2018-05/16-
015_01_XercesSoc_State-ofMonarch-Overwintering-Sites-in-California_web.pdf.
Zeiner, D.C., W.F. Laudenslayer Jr., K.E. Mayer, M. White (Eds). 1988- 1990 (with updates).
California’s Wildlife. Vol. I-III. California Depart. of Fish and Wildlife, Sacramento,
California. (Accessed October 2023).
https://map.dfg.ca.gov/imaps/cwhr/cwhrlife.html.
Zungri, D. 2005. Notes on three species of Bombus (Hymenoptera: Apidae) in the Central Valley
of California: new records of distribution and abundance. Pan-Pacific Entomologist 81(3-
4): 179-180.
R:\Projects\SAN04\3SAN040200\Documentation\BioTech\San Dimas BioTech-010524.docx
87 Biological Technical
Report
APPENDIX
A
REPRESENTATIVE
PHOTOGRAPHS
PHOTO 1: Areas 4a, 4g, and 4f from southwest
of Area 3c.
California buckwheat scrub, walnut woodland, and
coast live oak
woodland visible midground; water tank to the west
(8/5/2022).
PHOTO 2: Areas 3b and 3c from southwest. Ribbon
drain from
water tank visible in middle foreground. Also
shown: walnut
woodland, upland mustards/star thistle fields,
California buckwheat
scrub, and developed areas (8/5/2022).
PHOTO 3: Area 1c, coast prickly pear scrub
(7/1/2022).
PHOTO 4: Area 5f; coastal cactus scrub with
buckwheat in
foreground, and coast live oak woodland in left
background. View is
southwest (8/4/2022).
R:\Projects\SAN04\3SAN040200\Graphics\Bio\AttA Site
Photos.pdf
APPENDIX
B
PLANT AND WILDLIFE
COMPENDIA
San Dimas Municipal Code Text Amendment
(20-0005)
PLANT SPECIES DETECTED DURING
THE SURVEY
Species
Common
Name
Scientific
Name
Ultrasystem
s
Psomas
GYMNOSPERMS
PINACEAE – PINE
FAMILY
pine
Pinus
sp.*
x x
x
EUDICOT
ADOXACEAE – MUSKROOT S
FAMILY
blue elderberry
Sambucus
mexicana
Amaranthus
albus*
x
x
AMARANTHACEAE – AMARANTH
FAMILY
ANACARDIACEAE – SUMAC tumbleweed
FAMILY
laurel sumac
Malosma
laurina Schinus
molle*
pepper tree x
x
x
Toxicodendron x
diversilobum
western poison
APOCYNACEAE – DOGBANE oak
Funastrum cynanchoides var. FAMILY
hartwegii
climbing milkweed
ASTERACEAE – SUNFLOWER
FAMILY
California
sagebrush
x x
Artemisia x
californica
x
x
x
x
x
x
x
x
Baccharis pilularis ssp.
consanguinea
Baccharis salicifolia ssp.
salicifolia
coyote brush
mule fat
Carduus pycnocephalus ssp.
pycnocephalus*
Centaurea melitensis*
Cirsium occidentale
Italian
thistle
x
tocalote x
cobwebby
thistle
horseweed
Erigeron
canadensis Gutierrezia
microcephala
Lactuca serriola*
sticky snakeweed
prickly lettuce
rocky
malacothrix
Bioletti’s
cudweed
milk thistle
x
Malacothrix x
saxatilis
x
x
x
Pseudognaphalium
biolettii
Silybum marianum Sonchus *
oleraceus*
common sow
thistle
x
x
BIGNONIACEAE – BIGNONIA
FAMILY
blue jacaranda
Jacaranda
mimosifolia*
R:\Projects\SAN04\3SAN040200\Documentation\BioTech\San Dimas BioTech-010524.docx
B-1 Plant and Wildlife
Compendia
San Dimas Municipal Code Text Amendment
(20-0005)
PLANT SPECIES DETECTED DURING
THE SURVEY
Species
Common
Name
Scientific
Name
Ultrasystem
s
Psomas
BORAGINACEAE – BORAGE
FAMILY
cryptantha
Cryptantha
sp.
Phacelia sp.
x
phacelia x
BRASSICACEAE – MUSTARD
FAMILY
black mustard
Brassica
nigra*
x
x
x
Hirschfeldia x
incana*
grayish shortpod
mustard
CACTACEAE – CACTUS FAMILY
mission prickly-pear
Opuntia ficusindica*
Opuntia littoralis
x
coast prickly- x
pear
x
x
CAPRIFOLIACEAE – HONEYSUCKLE
FAMILY
Japanese
honeysuckle
Lonicera
japonica*
x
CHENOPODIACEAE – GOOSEFOOT
FAMILY
Australian saltbush
Atriplex
semibaccata*
Chenopodium
album*
Salsola tragus*
x
x
x
lamb’s
quarters Russian
CONVOLVULACEAE – MORNING–GLORY thistle
FAMILY
large-bracted morningglory
dodder
Calystegia
macrostegia
Cuscuta sp.
x
x x
CUCURBITACEAE – GOURD
FAMILY
buffalo gourd
Cucurbita
foetidissima
Marah macrocarpa
x
chilicothe x x
x
EUPHORBIACEAE – SPURGE
FAMILY
rattlesnake
sandmat
Euphorbia
albomarginata
Ricinus communis*
x
common castor x
bean FABACEAE – LEGUME
FAMILY
deerweed
Acmispon
glaber
x
Lupinus x
succulentus
arroyo
lupine
x
x
x
FAGACEAE – OAK
FAMILY
coast live
oak
Quercus agrifolia var.
agrifolia
Juglans californica
x
x
JUGLANDACEAE – WALNUT FAMILY
southern California black
walnut
R:\Projects\SAN04\3SAN040200\Documentation\BioTech\San Dimas BioTech-010524.docx
B-2 Plant and Wildlife
Compendia
San Dimas Municipal Code Text Amendment
(20-0005)
PLANT SPECIES DETECTED DURING
THE SURVEY
Species
Common
Name
Scientific
Name
Ultrasystem
s
Psomas
LAMIACEAE – MINT FAMILY
common
horehound
Marrubium
vulgare*
Salvia mellifera
x
x
x
x
black sage x
Trichostema
lanceolatum
vinegar weed
MYRTACEAE – MYRTLE
FAMILY
gum tree
Eucalyptus
spp.*
x x
x
x
NYCTAGINACEAE – FOUR O'CLOCK
FAMILY
bougainvillea
Bougainvillea
sp. OLEACEAE – OLIVE
FAMILY
European
olive
Olea
europaea* PLANTAGINACEAE – PLANTAIN
FAMILY
bunch leaf
beardtongue
POLYGONACEAE – BUCKWHEAT
FAMILY
California buckwheat
Penstemon
heterophyllus
x
Eriogonum
fasciculatum
Polygonum
aviculare*
x
x
x
knotweed
RHAMNACEAE – BUCKTHORN
FAMILY
hollyleaf redberry
Rhamnus
ilicifolia
x
x
ROSACEAE – ROSE
FAMILY
toyon
Heteromeles
arbutifolia
Rosa sp.*
x
cultivated x
rose SALICACEAE – WILLOW
FAMILY
arroyo willow
Salix
lasiolepis
x
x
SIMAROUBACEAE – SIMAROUBA
FAMILY
tree of heaven
Ailanthus
altissima* SOLANACEAE – NIGHTSHADE
FAMILY
night cestrum
Cestrum
nocturnum*
Datura wrightii
x
Wright’s x
jimsonweed
x
Nicotiana x
glauca*
tree tobacco
TAMARICACEAE – TAMARISK
FAMILY
saltcedar
Tamarix
ramosissima*
x
R:\Projects\SAN04\3SAN040200\Documentation\BioTech\San Dimas BioTech-010524.docx
B-3 Plant and Wildlife
Compendia
San Dimas Municipal Code Text Amendment
(20-0005)
PLANT SPECIES DETECTED DURING
THE SURVEY
Species
Common
Name
MONOCOTS
Scientific
Name
Ultrasystem
s
Psomas
AGAVACEAE – AGAVE FAMILY
Whipple’s chaparral
yucca
POACEAE – GRASS FAMILY
oat
Hesperoyucca
whipplei
x
Avena
sp.*
x
x
x
x
Bromus
diandrus*
Bromus rubens*
Hordeum
vulgare*
Stipa coronata
ripgut grass x
red brome x
barley
crested needle
grass
x
* Non-native
species
R:\Projects\SAN04\3SAN040200\Documentation\BioTech\San Dimas BioTech-010524.docx
B-4 Plant and Wildlife
Compendia
San Dimas Municipal Code Text Amendment
(20-0005)
WILDLIFE SPECIES DETECTED DURING
THE SURVEY
Species
Scientific
Name
Common
Name
Ultrasystem
s
Psomas
MILKWEED
NYMPHALIDAE – BRUSH-FOOTED BUTTERFLIES
BUTTERFLY FAMILY monarch
butterfly
x
LIZARDS
PHRYNOSOMATIDAE – SPINY
LIZARD FAMILY
western fence lizard
Sceloporus
occidentalis
Uta stansburiana
x
x
x
common side-blotched
lizard
ODONTOPHORIDAE – NEW WORLD BIRDS
QUAIL FAMILY
California quail
Callipepla
californica
x
x
COLUMBIDAE – PIGEON AND DOVE
FAMILY
Eurasian collareddove
Streptopelia
decaocto*
Zenaida macroura
x
x
mourning
dove TROCHILIDAE – HUMMINGBIRD
FAMILY
Anna’s
hummingbird
Calypte
anna
x
Selasphorus x
sasin
Allen’s
ACCIPITRIDAE – HAWK hummingbird
FAMILY
Cooper’s hawk
Accipiter
cooperii
Buteo lineatus
x
x
x
red-shouldered
hawk Buteo
jamaicensis
red-tailed
hawk
x
PHASIANIDAE - PARTRIDGE AND
TURKEY FAMILY
domestic rooster
Gallus
domesticus*
x
PICIDAE – WOODPECKER
FAMILY
acorn
woodpecker
Melanerpes
formicivorus
Picoides nuttallii
x
x
x
Nuttall’s x
woodpecker TYRANNIDAE – TYRANT FLYCATCHER
FAMILY
black phoebe
Sayornis
nigricans
x
x
x
Myiarchus
cinerascens
Tyrannus
vociferans
ash-throated
flycatcher Cassin’s
kingbird
x
R:\Projects\SAN04\3SAN040200\Documentation\BioTech\San Dimas BioTech-010524.docx
B-5 Plant and Wildlife
Compendia
San Dimas Municipal Code Text Amendment
(20-0005)
WILDLIFE SPECIES DETECTED DURING
THE SURVEY
Species
Scientific
Name
Common
Name
Ultrasystem
s
Psomas
Tyrannus
verticalis
western
kingbird
x
CORVIDAE – JAY AND CROW
FAMILY
California scrubjay
Aphelocoma
californica
Corvus
brachyrhynchos
Corvus corax
x
x
x
x
x
American
crow common
HIRUNDINIDAE – SWALLOW raven
FAMILY
cliff swallow
Petrochelidon
pyrrhonota
Baeolophus inornatus
Psaltriparus minimus
x
PARIDAE – TITMOUSE
FAMILY
oak titmouse
x
x
AEGITHALIDAE – BUSHTIT
FAMILY
bushtit
x
TROGLODYTIDAE – WREN
FAMILY
house wren
Troglodytes
aedon
x
Thryomanes x
bewickii
Bewick’s
wren
x
x
x
x
x
x
SYLVIIDAE – SILVIID WARBLERS
FAMILY
wrentit
Chamaea
fasciata
Mimus
polyglottos
Sturnus
vulgaris*
MIMIDAE – MOCKINGBIRD AND
THRASHER FAMILY
northern mockingbird
x
STURNIDAE – STARLING
FAMILY
European
starling* BOMBYCILLIDAE – WAXWING
FAMILY
cedar waxwing
Bombycilla
cedrorum
Phainopepla
nitens
Passer
domesticus*
PTILOGONATIDAE – SILKYFLYCATCHER FAMILY
phainopepla PASSERIDAE – OLD WORLD SPARROW
FAMILY
house sparrow*
x
FRINGILLIDAE – FINCH
FAMILY
house finch
Haemorhous
mexicanus
Spinus psaltria
x
x
x
x
lesser x
goldfinch Spinus
tristis
American
goldfinch
R:\Projects\SAN04\3SAN040200\Documentation\BioTech\San Dimas BioTech-010524.docx
B-6 Plant and Wildlife
Compendia
San Dimas Municipal Code Text Amendment
(20-0005)
WILDLIFE SPECIES DETECTED DURING
THE SURVEY
Species
Scientific
Name
Common
Name
Ultrasystem
s
Psomas
PASSERELLIDAE – NEW WORLD
SPARROW FAMILY
California towhee
Melozone
crissalis
Pipilo maculatus
x
x
x
x
spotted
towhee ICTERIDAE – BLACKBIRDS AND
ORIOLES
brown-headed
cowbird
Molothrus
ater MAMMAL
S SCIURIDAE – SQUIRREL
FAMILY
eastern fox
squirrel
Sciurus
niger*
x
x
x
Sciurus
griseus
western gray
squirrel Otospermophilus
beecheyi
California ground
squirrel
GEOMYIDAE – POCKET GOPHER
FAMILY
Botta’s pocket gopher
x
Thomomys bottae
Neotoma macrotis
Sylvilagus
audubonii
Canis latrans
x
x
x
CRICETIDAE – NEW WORLD RATS AND
MICE FAMILY
big-eared woodrat LEPORIDAE – HARE AND RABBIT
FAMILY
desert cottontail
x
CANIDAE – CANID
FAMILY
coyote
x
Canis lupus x
familiaris*
domestic
dog
X
* Non-native
species
R:\Projects\SAN04\3SAN040200\Documentation\BioTech\San Dimas BioTech-010524.docx
B-7 Plant and Wildlife
Compendia
APPENDIX
C
PROJECT IMPACTS BY
PARCEL
San Dimas Municipal Code Text Amendment
(20-0005)
TABLE CVEGETATION ACREAGE WITHIN THE 35 1 % LOT
COVERAGE
Parcel Total
1 2
3 4
5 6
7 8
9 10
11 12
13 14
15 16
17 18
19 20
21 22
23 24
25 26
27 28
29 30
31 32
33 —
—
—
—
—
—
—
—
—
0.040 —
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
0.040
—
—
—
—
—
—
—
—
—
—
0.711 —
—
—
—
—
—
—
—
—
—
—
—
0.004 —
—
—
—
—
0.101
0.103 —
—
—
—
—
—
—
—
—
—
—
—
—
—
—
0.074 —
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
0.074
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
0.000
—
—
—
—
—
—
—
—
—
—
0.981 —
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
0.981
—
—
—
—
—
—
—
—
—
—
—
—
0.117
0.030 —
—
—
—
—
—
—
—
—
—
—
—
0.012
0.019 —
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
0.003 —
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
0.003
0.799 ——
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
0.000
—
—
—
—
—
—
—
—
0.076
0.266 —
—
—
—
—
—
—
—
—
—
—
—
—
—
0.214 —
—
—
—
—
—
—
—
—
—
—
—
—
—
—
0.788
0.056
0.132
0.176
0.395
0.092 —
—
—
—
—
0.015 —
—
0.181 —
—
0.043 —
—
—
—
0.799
0.788
0.540
0.490
0.473
0.672
0.647
0.745
1.379
0.992
3.697
0.692
0.329
1.358
0.581
1.011
0.543
0.384
0.349
0.244
0.324
0.370
0.497
1.050
1.149
1.020
0.588
0.842
0.842
0.366
0.595
0.592
0.578
0.511
0.437
0.493
0.000
26.967
0.367
0.328
0.297
0.277
0.474
0.298
1.129
0.053
1.084
0.691
0.314
1.358
0.342
0.501
0.481
0.244
0.000*
0.244
0.324
0.370
0.273
0.391
0.189
0.528
0.303
0.664
0.592 —
— —
—
—
0.081 —
0.130
0.035
0.034
0.804 —
—
—
—
—
0.050
0.121
0.306 —
—
—
0.313
0.019 —
0.030
0.001 —
0.004
0.120
0.599
0.010 —
—
—
0.207
0.248 —
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
0.032
0.081 —
—
—
—
—
—
—
0.627
0.257 —
—
—
—
—
—
—
0.224 — 0.028
0.048
0.437 —
0.441
0.055
0.285
0.178 —
—
0.250
0.265
0.301
0.289
0.420 —
—
—
—
3.916
—
0.191
0.303
0.134 —
—
—
—
—
—
—
—
—
—
1.360
0.024
0.511
0.437
0.493 —
34 35
36 —
—
—
—
—
—
—
0.556
Open Space
Total
—
0.919
—
3.372 0.178 14.380 1.188
R:\Projects\SAN04\3SAN040200\Documentation\BioTech\San Dimas BioTech-010524.docx
C-1 Project Impacts by
Parcel
San Dimas Municipal Code Text Amendment
(20-0005)
TABLE CVEGETATION ACREAGE WITHIN THE CONCEPTUAL GRADING AREA 2 – 20 FEET BEYOND THE 35% LOT COVERAGE AREA
Parcel Total
1 2
3 4
5 6
7 8
9 10
11 12
13 14
15 16
17 18
19 20
21 22
23 24
25 26
27 28
29 30
31 32
33 —
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
0.000
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
0.000
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
0.000
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
0.002 —
—
—
—
—
—
—
—
0.002
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
0.000
—
—
—
—
—
—
—
—
—
—
—
—
0.015 —
—
—
0.014 —
—
—
—
—
—
—
—
—
—
—
—
0.050 —
—
—
—
—
—
—
—
—
—
—
—
—
0.012
0.004 —
—
—
—
—
—
—
—
—
—
—
—
0.005
0.026 —
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
0.000
0.068 —
—
—
—
—
—
—
0.032 —
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
0.000
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
0.000
—
—
—
—
—
—
—
0.004
0.056
0.039 —
—
—
—
—
0.024 —
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
0.088
0.021
0.065
0.065
0.049
0.037 —
—
—
—
—
0.053 —
—
0.032 —
—
—
—
—
—
0.068
0.088
0.033
0.069
0.065
0.049
0.059
0.032
0.088
0.039
0.000
0.069
0.058
0.129
0.000
0.056
0.073
0.062
0.061
0.059
0.071
0.054
0.068
0.000
0.078
0.094
0.091
0.065
0.070
0.084
0.029
0.008
0.053
0.050
0.063
0.083
0.000
2.118
—
0.022
0.013 —
—
—
—
—
—
—
—
0.055
0.005
0.129 —
—
0.024 —
—
0.044
0.036
0.061
0.002
0.004 —
—
0.057
0.067
0.054
0.000* —
—
0.023 —
—
0.023 —
—
—
0.068 ——
—
0.008
0.066 —
0.020
0.005
0.091
0.065 —
—
0.045
0.084 —
—
0.042 —
—
—
—
0.655
—
0.029
0.008
0.011 —
—
—
0.000*
0.050
0.063
0.083 —
34 35
36 —
—
—
Open Space —
Total
—
0.479
—
0.079
—
0.047 0.733 0.123
R:\Projects\SAN04\3SAN040200\Documentation\BioTech\San Dimas BioTech-010524.docx
C-2 Project Impacts by
Parcel
San Dimas Municipal Code Text Amendment
(20-0005)
TABLE CVEGETATION ACREAGE WITHIN THE 3
CONSERVATION EASEMENT
Parcel Total
1 2
3 4
5 6
7 8
9 10
11 12
13 14
15 16
17 18
19 20
21 22
23 24
25 26
27 28
29 30
31 32
33 —
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
0.000
—
—
—
0.107
0.165 —
—
—
—
—
0.316 —
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
0.340
0.332
0.060
0.101
0.173
0.847 —
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
0.216 —
0.013 —
—
—
—
—
—
—
—
—
—
—
—
—
—
1.890 —
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
1.890
—
—
—
—
—
—
—
—
—
0.309
0.200
0.030 —
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
0.056 —
—
—
—
—
0.030
0.106 —
—
—
—
—
—
—
3.383 —
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
0.579
0.252 —
0.010 —
—
—
—
—
—
—
—
—
—
—
0.657 —
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
0.657
—
—
—
—
—
—
—
—
0.030
0.115 —
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
0.004
0.333
0.432
0.411
0.354
0.621
0.237 —
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
0.456
0.176
0.397 —
0.220
0.064 —
—
—
0.028
0.018 —
—
2.332
6.083
0.583
0.924
0.738
0.563
0.527
0.961
0.704
1.146
2.237
1.773
16.222
1.109
0.052
1.092
1.465
1.693
0.000
0.000
0.000
0.000
0.000
0.000
0.000
2.616
2.137
1.341
0.440
0.897
0.583
0.000
0.958
1.027
0.743
0.557
0.404
0.603
11.613
55.708
0.005
0.008 —
0.135
0.867
0.175
0.394
7.237
0.297 —
0.047
0.067
0.000* —
—
—
—
—
—
—
—
—
0.000*
0.582
0.061
1.393
0.812
0.052
0.484
0.854
0.496 —
—
—
—
—
—
—
2.160
0.913 —
—
—
—
—
—
—
—
—
—
—
2.802
10.609
0.008 —
0.001
0.007
0.000* —
—
—
—
—
—
—
—
—
—
—
—
—
—
0.000* —
—
—
—
—
—
0.020
0.073
0.579
0.997
2.526
0.211
1.349
1.029
0.492 —
0.000*
0.561
0.544
1.197 —
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
1.748
7.131
—
—
—
—
—
1.048
0.944
0.440
0.677
0.247 —
0.945
1.027
0.715
0.472
0.160
0.018
3.282
19.207
34 35
36 0.047
0.171
0.006 —
—
—
—
—
—
0.452
1.040
—
—
0.229
—
—
3.519
Open Space
Total
—
1.853 0.819 0.145
R:\Projects\SAN04\3SAN040200\Documentation\BioTech\San Dimas BioTech-010524.docx
C-3 Project Impacts by
Parcel
San Dimas Municipal Code Text Amendment
(20-0005)
TABLE CVEGETATION ACREAGE WITHIN THE REMAINDER OF 4
THE PARCEL
Parcel Total
1 2
3 4
5 6
7 8
9 10
11 12
13 14
15 16
17 18
19 20
21 22
23 24
25 26
27 28
29 30
31 32
33 —
—
—
—
—
—
—
—
—
0.049 —
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
0.049
—
—
—
—
—
—
—
—
—
—
0.020 —
—
—
—
—
—
—
—
—
—
—
0.004
0.017 —
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
0.000
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
0.020 —
—
—
—
—
—
—
—
—
0.020
—
—
—
—
—
—
—
—
—
—
0.609 —
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
0.609
—
—
—
—
—
—
—
—
—
0.006
0.342 —
—
—
—
—
—
—
—
—
—
—
—
—
0.106 —
—
—
—
—
—
—
—
—
—
—
—
—
—
0.169
0.379 —
—
—
0.102
0.001 —
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
0.326 —
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
0.326
0.821 —
—
—
—
—
—
—
—
0.019
0.160
0.137
0.098
0.397
0.095
0.107
0.144
0.065
0.009
0.170
0.217
0.267
0.115
0.071
0.037
0.123
0.114
0.149 —
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
0.000
—
—
—
—
—
—
—
—
—
0.018 —
—
—
—
—
—
—
—
—
—
—
—
—
—
0.078 —
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
0.130 —
—
0.070
0.417
0.025
0.095 —
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
0.005
0.359 —
—
—
—
—
—
—
—
—
—
0.260 —
0.826
0.465
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.222
1.478
0.210
0.507
1.021
0.144
0.352
0.935
0.661
0.585
0.394
0.534
0.629
0.877
0.166
0.249
0.452
0.547
0.616
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
11.870
—
0.021
0.073
0.079
0.207
0.024
0.013 —
—
—
—
—
—
—
0.039
0.025 —
—
—
—
—
—
—
—
0.137
0.006
0.004
0.037 —
0.616
0.213
0.539
0.224
0.317
0.259
0.410 —
0.063
0.130
0.433
0.447 —
—
—
—
—
—
—
—
—
—
0.001
0.347
0.039
0.046
0.199 —
—
—
—
—
—
—
—
—
—
—
1.440
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
0.481
34 35
36 —
—
—
0.757
—
—
0.041
—
—
0.096
Open Space
Total 3.999 3.315 0.737
R:\Projects\SAN04\3SAN040200\Documentation\BioTech\San Dimas BioTech-010524.docx
C-4 Project Impacts by
Parcel
San Dimas Municipal Code Text Amendment
(20-0005)
TABLE CMAXIMUM POTENTIAL VEGETATION 5
IMPACTS
Parcel Total
1 2
3 4
5 6
7 8
9 10
11 12
13 14
15 16
17 18
19 20
21 22
23 24
25 26
27 28
29 30
31 32
33 —
—
—
—
—
—
—
—
—
0.089 —
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
0.089
—
—
—
—
—
—
—
—
—
—
0.731 —
—
—
—
—
—
—
—
—
—
—
0.004
0.021 —
—
—
—
—
0.101
0.103 —
—
—
—
—
—
—
—
—
—
—
—
—
—
—
0.074 —
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
0.074
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
0.020
0.002 —
—
—
—
—
—
—
—
—
—
—
—
—
—
—
1.590 —
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
1.590
—
—
—
—
—
—
—
—
—
—
—
0.106
0.129
0.034 —
—
—
—
—
—
—
—
—
—
—
—
0.186
0.424 —
—
—
0.102
0.001 —
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
0.329 —
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
0.329
1.688 ——
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
0.000
—
—
—
—
—
—
—
—
0.076
0.284 —
—
—
—
—
—
—
—
—
—
—
—
—
—
0.292 —
—
—
—
—
—
—
—
—
—
—
—
—
—
0.005
1.235
0.077
0.197
0.241
0.444
0.129 —
—
—
—
—
0.328 —
—
0.350
0.006
0.004
0.008 —
1.693
1.341
0.573
0.559
0.538
0.721
0.706
0.777
1.467
1.253
5.175
0.971
0.894
2.508
0.725
1.419
1.551
1.107
0.995
0.697
0.929
1.053
1.442
1.216
1.476
1.566
1.226
1.523
0.912
0.450
0.624
0.600
0.631
0.561
0.500
0.576
0.000
40.955
0.367
0.328
0.297
0.277
0.474
0.298
1.161
0.072
1.244
0.883
0.417
1.884
0.437
0.608
0.649
0.309
0.009
0.471
0.608
0.691
0.388
0.462
0.226
0.674
0.417
0.813
0.615 —
— —
—
—
0.103 —
0.143
0.035
0.040
1.146 —
—
—
—
—
0.710
0.370
0.906
0.226
0.321
0.259
0.702 —
0.524
0.190
0.809
0.690 —
0.328
0.019 —
0.051
0.088
0.079
0.207
0.056
0.094 —
—
—
—
—
—
—
0.666
0.332 —
—
—
—
—
—
—
—
—
—
—
—
1.920
0.008
0.176
0.768
0.010 —
0.070
0.417
0.232
0.367 —
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
0.001
0.347
0.067
0.102
0.702 —
—
0.295
0.349
0.301
0.289
0.462 —
—
—
—
6.011
—
0.220
0.311
0.145 —
—
—
—
—
0.024
0.561
0.500
0.576 —
34 35
36 —
—
—
0.022
—
—
—
0.982
—
—
—
0.652
Open Space
Total
—
0.960
—
7.850 18.428 2.048
Note: The maximum potential vegetation impacts represents all areas within the parcel outside the conservation easement.
R:\Projects\SAN04\3SAN040200\Documentation\BioTech\San Dimas BioTech-010524.docx
C-5 Project Impacts by
Parcel
San Dimas Municipal Code Text Amendment
(20-0005)
C-6
MITIAGTION MEASURES APPLICABLE TO EACH
LOT NUMBER
Mitigation
Mitigation
Measure 3:
Jurisdictiona
l
Permitting
(SurveyJurisdictiona
l
Delineation)2
Measure 4:
Nesting
Birds/
Raptors
(Constructio
n
Timing/ Preconstruction
Survey)
Mitigation
Measure 7:
Coastal
California
Gnatcatche
r
(Focused
Survey)
Mitigation
Measure 1:
Environmentall
y
Sensitive
Areas
(Design/Plan
Check)
Mitigation
Measure 5:
Special
Status
Plant
Species
(Focused
Mitigation
Measure 11:
Invasive
Species
(Design/Pla
n
Check)
Mitigation
Measure 2:
Protected
Trees
Mitigation
Measure 6:
Crotch
Bumble
Bee
(Focused
Survey)
Mitigation
Measure 8
Burrowing
Owl
(PreMitigation
Measure 9:
Roosting
Bats
(Constructio
n
Timing/BMPs
)
Mitigation
Measure 10:
Water
Quality
(Constructio
n
BMPs)
Mitigation
Measure 12:
Night
Lighting
(Design/Plan
Check)
Mitigation
Measure 13:
Bird Strikes
(Design/Pla
n
Check)
Vegetation Types within
Potential
Impact Area1
Lot
Number
Lot 1
(Tree
Survey)
Survey) construction
) None P
P
P
P
P
P
P
X
P
X
X
X
X
P
P
P
P
P
P
P
P
P
P
P
X
P
P
P
P
P
P
P
P
P
P
P
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
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
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
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
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
X
X
X
X
X
X
X
X
X
X
X
X
X
X
Lot 2 Woodland,
Ruderal
Woodland,
Ruderal
Woodland,
Ruderal
Ruderal
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
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
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
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
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
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
Lot 3
Lot 4
Lot 5
Lot 6 Ruderal
Lot 7 Woodland, Ruderal
Woodland, Ruderal
Woodland, Ruderal
CSS, Woodland, Ruderal
CSS/Cactus Scrub, Woodland,
Ruderal
Woodland
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
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
Lot 8
Lot 9
Lot 10
Lot 11
Lot 12
Lot 13
Lot 14
Lot 15
Lot 16
Lot 17
Lot 18
Lot 19
Lot 20
Lot 21
Lot 22
Lot 23
Lot 24
Lot 25
Lot 26
Lot 27
Lot 28
Lot 29
Lot 30
Lot 31
Lot 32
Lot 33
Lot 34
Lot 35
Lot 36
Open Space
X
X
Woodland,
Ruderal
Woodland,
Ruderal
Woodland,
Ruderal
Woodland,
Ruderal
Woodland
Woodland
Woodland, Ruderal
CSS, Woodland,
Ruderal
CSS, Woodland,
Ruderal
Woodland, Ruderal
Woodland, Ruderal
Woodland
X
X
X
X
X
CSS, Woodland,
Ruderal
CSS, Ruderal
X
X
X
X
X
X
X
X
X
CSS, Ruderal
CSS, Woodland,
Ruderal
Woodland, Ruderal
Woodland, Ruderal
None
X
X
X
X
X
X
Woodland X X X X X X X
None
None [all within Conservation
1 Easement]
1 1
2 2
CSS: Coastal sage scrub vegetation types include California sagebrush scrub (disturbed), California buckwheat scrub, California buckwheat scrub (disturbed), California sagebrush – California buckwheat scrub, California sagebrush – black sage scrub, and coast prickly pear scrub.
Woodland: Woodland vegetation types include California walnut groves, California walnut groves (disturbed), and coast live oak woodland (disturbed). Ruderal: Ruderal vegetation types include upland mustards or star-thistle fields and upland mustards or star-thistle fields (disturbed); these areas are dominated by non herbaceous species.
X - This mitigation measure would be required for the parcel. P - A formal jurisdictional delineation was not conducted; therefore, it is unknown whether these parcels contain drainage features that were not identified by the National Wetlands Inventory (see Exhibit 10). If a proposed homeowner project would impact a drainage feature, a jurisdictional delineation may be required. Color Code for Type of Mitigation Design/Plan Check Focused
Surveys Pre-construction
Survey
Construction
Timing/BMP
R:\Projects\SAN04\3SAN040200\Documentation\BioTech\San Dimas BioTech-010524.docx
C-6 Project Impacts by
Parcel
Appendix C
Recirculated Draft
IS/MND
June 2024
Recirculated
Draft Initial Study/
Mitigated Negative
Declaration
Prepared for
the
Municipal Code Text Amendment
20-0005
San Dimas - MCTA 20-0005 Project
In San Dimas, California
State Clearinghouse Number:
2022120594
Prepared
for
Prepared
by
Ken Fichtelman
Associate
Planner
City of San
Dimas
Psomas
5 Hutton Centre Drive,
Suite 300
Santa Ana, California
92707
June
2024
TableofCon
tents
Page
TABLEOFCON
TENTS
Section
1.0 2.0
ExecutiveSummary............................................................................... ..............................1‐1
RecirculatedDraftIS/MND................................................................ ...............................2‐1 2.1
2.2 2.3
2.4 Project
Location........................................................................................... ............................2-1
Proposed Project
......................................................................................................... ............2-1
Incorporation by
Reference......................................................................................... .......2-1
Notice of
Recirculation.................................................................................... ......................2-1
3.0 4.0
EnvironmentalChecklist....................................................................... ............................3‐1
UpdatedBiologicalResourcesSection................................................ ..........................4‐1 4.1.1
RegulatorySetting..................................................................................... ..................4‐3
4.1.2 Methodology.................................................................................................. ..............4‐14
4.1.3 ExistingConditions................................................................................... .................4‐16
4.1.4 ImpactAnalysis.......................................................................................... .................4‐62
4.1.5 MitigationProgram.................................................................................. ................4‐78
4.1.6 LevelofSignificanceAfterMitigation...................................... .........................4‐89
TABLE
S
Table
Page
4.4-1 Vegetation Types and Other Areas in the BSA
.......................................................................4-17
4.4-2 Special Status Plant Species Reported from the Project Region ....................................4-30
4.4-3 Special Status Wildlife Species Reported from the Project Region...............................4-49
4.4-4 Vegetation Types and Other Areas in the BSA
.......................................................................4-64
4.4-5 Mitigation Measures Applicable to Each Lot Number ........................................................4-79
MUNICIPAL CODE TEXT AMENDMENT 20-
0005 PROJECT
i
RECIRCULATED DRAFT INITIAL STUDY/MITIGATED
NEGATIVE DECLARATION
1.0 EXECUTIVE
SUMMARY
In December 2023, the City of San Dimas (City) circulated a Draft Initial Study/Mitigated
Negative Declaration (IS/MND) for the Municipal Code Text Amendment (MCTA) 20-0005
San Dimas - MCTA 20-0005 Project (Project) pursuant to the California Environmental
Quality Act (CEQA).
During public review of the Draft IS/MND, the City received a comment from California
Department of Fish and Wildlife (CDFW) that identified revisions in the biological resources
analyses which were needed. As required by Section 15073.5 of the State CEQA Guidelines, a lead agency is required to
recirculate a negative declaration when the document must be substantially revised after
public notice of its availability but prior to its adoption. A “substantial revision” of the
negative declaration means: (1) A new, avoidable significant effect is identified and
mitigation measures or project revisions must be added in order to reduce the effect to
insignificance, or (2) The lead agency determines that the proposed mitigation measures or
project revisions will not reduce potential effects to less than significance and new measures
or revisions must be required.
The purpose of this Recirculated Draft IS/MND is to provide the public, interested agencies,
and other stakeholders with an opportunity to review and comment on the updated
biological resources analyses that have been prepared for the Project since the original Draft
IS/MND was circulated in December 2023. The updated biological resources analyses and
responses to the related CEQA thresholds are provided within Section 4.0, Updated
Biological Resources Section, of this Recirculated Draft IS/MND. The City requests that any
comments on the revised biological resources analyses be provided to the City during the
thirty-day public review period for this Recirculated Draft IS/MND of June 21, 2024 to July
21, 2024.
In summary, based on the updated biological resources technical report and associated
environmental analysis, impacts related to biological resources would be less than
significant with implementation of mitigation measures.
MUNICIPAL CODE TEXT AMENDMENT 20-
0005 PROJECT
1-1
RECIRCULATED DRAFT INITIAL STUDY/MITIGATED
NEGATIVE DECLARATION
Recirculated Draft
IS/MND
This page intentionally left
blank
MUNICIPAL CODE TEXT AMENDMENT 20-
0005 PROJECT
1-2
RECIRCULATED DRAFT INITIAL STUDY/MITIGATED
NEGATIVE DECLARATION
2.0 RECIRCULATED DRAFT
IS/MND
2.1 PROJECT
LThe Project site is approximately 92 acres in the southwest part of the OCATION city of San Dimas.
Regional access to the site is from Interstate 10, (I-10 or the San Bernardino Freeway) via
Via Verde, Covina Hills Road, and Calle Francesca. The Project site is bounded by Covina Hills
Road to the south; single-family residential uses and vacant land in the city of Covina and
unincorporated Los Angeles County to the west; single-family residences opposite Puente
Street to the north; and single-family residences and vacant land to the east. The site includes
36 single-family residential parcels, 29 of which are developed and seven vacant.
2.2 PROPOSED
PROJECT The proposed Municipal Code Text Amendment (MCTA) would allow for up to one thousand
(1,000) cubic yards (CY) of grading, cut, and fill, beyond the grading necessary for the
primary residence, driveway and garage for properties located within SP-11 Planning Area
1 (36 residential lots, up to 36,000 CY grading). Per the previous Development Plan Review
Board policy, a swimming pool and five (5) feet of decking surrounding the pool were
exempted from the additional grading calculations, and will be codified as part of the
proposed MCTA. The proposed MCTA would also include development standards for the
grading, landscaping, and any retaining walls that the additional grading would require.
2.3 INCORPORATION BY
REFERENCE As allowed by Section 15150 of the State CEQA Guidelines, an IS/MND may incorporate by
reference all or portions of another document which is a matter of public record or is
generally available to the public. Where all or part of another document is incorporated by
reference, the incorporated language shall be considered to be set forth in full as part of the
text of the IS/MND.
This Recirculated Draft IS/MND incorporates the Draft IS/MND that was prepared and
circulated for the Project in December 2023, which is provided as Appendix A. 2.4 NOTICE OF
RECIRCULATION Notice of recirculation shall comply with Sections 15072 and 15073.
As required by State CEQA Guidelines Section 15072, the City has provided an updated notice
of intent to adopt an IS/MND for this Project to the public, responsible agencies, trustee
agencies, and the County Clerk prior to the City’s adoption of the IS/MND. Also, the City has
mailed a notice of intent to adopt an IS/MND to the last known name and address of all
organizations and individuals who have previously requested such notice in writing. The City
has also provided notice of intent to adopt a mitigated negative declaration for this Project
by direct mailing.
MUNICIPAL CODE TEXT AMENDMENT 20-
0005 PROJECT
2-1
RECIRCULATED DRAFT INITIAL STUDY/MITIGATED
NEGATIVE DECLARATION
Recirculated Draft
IS/MND
Finally, the notice of intent for this recirculated Draft IS/MND has been submitted to the State
Clearinghouse and has been posted with the County Clerk such notices in the office of the
County Clerk for a period of thirty days.
MUNICIPAL CODE TEXT AMENDMENT 20-
0005 PROJECT
2-2
RECIRCULATED DRAFT INITIAL STUDY/MITIGATED
NEGATIVE DECLARATION
EnvironmentalChe
cklist
Thispageintentionally
leftblank
MUNICIPAL CODE TEXT AMENDMENT 20-
0005 PROJECT
3-2
RECIRCULATED DRAFT INITIAL STUDY/MITIGATED
NEGATIVE DECLARATION
4.0 UPDATEDBIOLOGICALRESOURCES
SECTION
The information in this section is based on the Biological Technical Report for the SanDimas
MunicipalCodeTextAmendment(200005),CityofSanDima
s,LosAngelesCounty,California
prepared by Psomas in January 2024. Ultrasystems conducted a literature review and biological surveys of the Biological Study
Area (BSA) in 2022. Following the surveys, Ultrasystems (2022) prepared a Biological
Resources Evaluation to support the IS/MND that was publicly circulated for the Project. The
City received extensive public comments on the mitigation approach for biological resources
and hired Psomas to conduct a peer review of the Biological Resources Evaluation and
ultimately to prepare a mitigation approach that addressed public comments. Psomas
conducted a field visit to verify the vegetation mapping and subsequently updated the
findings and mitigation approach based on their professional judgement. As requested by
the City, the Biological Technical Report incorporates the extensive information collected by
Ultrasystems during their literature review and 2022 biological surveys to describe existing
conditions, including use of figures prepared by Ultrasystems (2022). Psomas has
supplemented information with additional literature review and observations made during
Psomas’ 2023 field visit. The findings within this section are based on the professional
opinion of Psomas. Psomas’ Biological Technical Report (2024) is included as Appendix B.
MUNICIPAL CODE TEXT AMENDMENT 20-
0005 PROJECT
4-1
RECIRCULATED DRAFT INITIAL STUDY/MITIGATED
NEGATIVE DECLARATION
UpdatedBiologicalResourc
esSection
Lessthan
Significant
with
Mitigation
Potentially
Significant
Impact
Lessthan
Significant
Impact
No
Wouldtheproje Impact
ct:
Incorporated
a) Have a substantial adverse
effect, either
directly or through habitat modifications, on any species identified
as a candidate, sensitive, or
special
status species in local or regional
plans,
policies, or regulations, or by the
California Department of Fish
and
Wildlife or U.S. Fish and Wildlife
Service?
X
b) Have a substantial adverse effect
on any
riparian habitat or other sensitive
natural community identified in
local or
regional plans, policies,
regulations or
by the California Department of
Fish and
Wildlife or U.S. Fish and Wildlife
Service?
X
X
c) Have a substantial adverse
effect on
state or federally protected
wetlands
(including, but not limited to,
marsh,
vernal pool, coastal, etc.) through
direct
removal, filling, hydrological
interruption, or other
means? d) Interfere substantially with the
movement of any native resident
or
migratory fish or wildlife species
or with
established native resident or
migratory
wildlife corridors, or impede the
use of
native nursery sites?
X
X
e) Conflict with any local policies
or
ordinances protecting
biological
resources, such as a tree
preservation
policy or ordinance?
f) Conflict with the provisions of
an
adopted Habitat Conservation
Plan,
Natural Community
Conservation Plan,
or other approved local,
regional, or
state habitat conservation plan?
X
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4.1.1 REGULATORYSETTIN
GProjects are required to comply with various federal, State, and local regulations designed to
protect and promote environmental quality. These regulations are summarized below. It should be noted that because the environmental document for SP-11 is being modified, the
Project must be evaluated according to current regulatory requirements, some of which have
changed since the initial Specific Plan was adopted. For example, new species have been
listed under the federal and State Endangered Species Acts; the potential for these species to
occur and the requirements resulting from potential impacts must be evaluated by today’s
standards within this Biological Resources section.
Federal
NationalEnvironmentalPoli
cyAct The National Environmental Policy Act (NEPA) establishes a broad national framework for
protecting the environment. NEPA’s basic policy is to assure that all branches of government
give proper consideration to the environment prior to undertaking any major federal action
that significantly affects the environment (42 UnitedStatesCode [USC] 4321-4347). NEPA
established the U.S. Environmental Protection Agency (USEPA) with the following roles and
functions: (1) to establish and enforce environmental protection standards consistent with
national environmental goals; (2) to conduct research on the adverse effects of pollution and
on methods and equipment for controlling it; the gathering of information on pollution; and
the use of this information in strengthening environmental protection programs and
recommending policy changes; (3) to assist, through grants, technical assistance, and other
means, in arresting pollution of the environment; and (4) to assist the Council on
Environmental Quality in developing and recommending to the President new policies for
the protection of the environment.
FederalEndangeredSpecie
sAct The Federal Endangered Species Act (FESA) designates and protects plants and animals that
are listed as “Endangered” or “Threatened.” The USFWS and the National Marine Fisheries
Service (NMFS) share responsibility for administration of the FESA. The USFWS is primarily
responsible for terrestrial and freshwater organisms while the NMFS is primarily
responsible for marine wildlife. Under Section 9 of the FESA, federally listed species are
protected from unauthorized “take,” which is defined in the FESA as acts to “harass, harm,
pursue, hunt, shoot, wound, kill, trap, capture, or collect or attempt to engage in any such
conduct” (16 USC Sections 1532[19] and 1538[a]). In this definition, “harm” includes “any
act which actually kills or injures fish or wildlife, and emphasizes that such acts may include
significant habitat modification or degradation that significantly impairs essential
behavioral patterns of fish or wildlife” (50
CodeofFederalRegulations[CFR], Title 50, Section
17.3). Section 9 take prohibitions apply to listed wildlife and fish species, but not to plants.
Endangered plants are not protected from take, although it is unlawful to remove, possess,
or maliciously damage or destroy them on federal lands. Removing or damaging listed plants
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on State and private lands in knowing violation of State law, or in the course of violating a
State criminal trespass law, is also illegal under the FESA.
Two sections of the FESA authorize incidental take. Section 7 regulates take associated with
federal projects or projects that require a federal permit. It also requires federal agencies to
use their authority to carry out conservation programs to benefit Endangered and
Threatened species. Under Section 7, federal agencies are required to consult with the
USFWS or the NMFS to ensure that any action they carry out, including those they fund or
authorize (such as through a permit) would “not likely to jeopardize the continued existence
of any Endangered species or Threatened species or result in the destruction or adverse
modification of habitat of such species” (16 USC 1536[a]). Under Section 7, consultations can
be either informal or formal. An incidental take permit pursuant to Section 10(a)(1)(B) is
required when non-federal, otherwise lawful activities, including lawful project
development, would result in take of Threatened or Endangered wildlife. Under this
provision, the USFWS and/or the NMFS may, where appropriate, authorize the taking of
federally listed wildlife or fish if such taking occurs incidentally during otherwise legal
activities. Section 10(a)(2)(B) requires an application for an incidental take permit to include
a Habitat Conservation Plan (HCP). The purpose of the habitat conservation planning process
associated with the permit is to ensure there are adequate avoidance, minimization, and
mitigation measures to address the effects of the authorized incidental take. Section 10
provides a clear regulatory mechanism to permit the incidental take of federally listed fish
and wildlife species by private interests and non-federal governmental agencies.
FESA also provides for designation of Critical Habitat: specific areas within the geographical
range occupied by a species where physical or biological features “essential to the
conservation of the species” are found and “which may require special management
considerations or protection” (16 USC 1538[5][A]). Critical Habitat may also include areas
outside the current geographical area occupied by the species that are nonetheless essential
for the conservation of the species.
FishandWildlifeCoordina
tionAct The Fish and Wildlife Coordination Act requires consultation with the USFWS and the fish
and wildlife agencies of States where the “waters of any stream or other body of water are
proposed or authorized, permitted or licensed to be impounded, diverted . . . or otherwise
controlled or modified” by any agency under a federal permit or license.
Consultation is to
be undertaken for the purpose of “preventing loss of and damage to wildlife resources.”
CleanWaterActof
1972 Section
404 Section 404 of the Clean Water Act (CWA) (33 USC 1251 et seq.) regulates the discharge of
dredged or fill material into waters of the United States (WOTUS), including wetlands. The
U.S. Army Corps of Engineers (USACE) is the designated regulatory agency responsible for
administering the 404 permit program and for making jurisdictional determinations. This
permitting authority applies to all WOTUS where the material has the effect of (1) replacing
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any portion of WOTUS with dry land or (2) changing the bottom elevation of any portion of
WOTUS. These fill materials would include sand, rock, clay, construction debris, wood chips,
and materials used to create any structure or infrastructure in WOTUS. Dredge and fill
activities are typically associated with development projects; water resource-related
projects; infrastructure development; and wetland conversion to farming, forestry, or urban
development. Authorizations are conducted through the issuance of Nationwide (or General)
Permits, through Individual (or Standard) Permits, or through Letters of Permission.
Wetlands and other waters that do not meet the definition of WOTUS are not covered by the
CWA; however, they are regulated by the State of California through the Porter-Cologne
Water Quality Control Act and State Water Resources Control Board (SWRCB) Resolution No.
2019-0015 for California.
Under Section 401 of the CWA, an activity requiring a USACE Section 404 permit must obtain
a State Water Quality Certification (or waiver thereof) to ensure that the activity will not
violate established federal or State water quality standards. The SWRCB, in conjunction with
the nine California Regional Water Quality Control Boards (RWQCBs), is responsible for
administering the Section 401 water quality certification program.
The definition of WOTUS has been the subject of shifting regulations.
Past federal revisions
to regulations addressing the extent of USACE jurisdiction and the definition of WOTUS have
been issued by the Obama Administration in 2015 and the Trump Administration in 2020.
On January 18, 2023, the USEPA published a final Water Rule in the Federal Register that
went into effect on March 20, 2023 (“the 2023 Rule”) (USACE and USEPA 2023a).
The definition of WOTUS changed again in response to the Supreme Court decision in the
case of Sackettv.USEPA. On September 8, 2023, the USEPA and the USACE amended the Code
of Federal Regulations to conform the definition of WOTUS to the Supreme Court decision
(USACE and USEPA 2023b). This conforming rule amends the provisions of the agencies’
definition of WOTUS that were invalid under the Supreme Court’s interpretation of the CWA
under Sackett. Based on these changes, tributaries must have at least relatively permanent
flow to be considered WOTUS from the federal definition. This would exclude ephemeral
drainages from being WOTUS. This represents a substantial change to areas under federal
jurisdiction in the arid west.
Section
402 Pursuant to Section 402(p) of the CWA, stormwater permits are required for discharges from
a municipal separate storm sewer system (MS4) serving a population of 100,000 or more.
The SWRCB and RWQCBs have been authorized by the USEPA to implement and enforce the
Municipal Storm Water Program (SWRCB 2023).
In the County of Los Angeles, Order No. R4-2012-0175 as amended by State Water Board
Order WQ 2015-0075 and Los Angeles Water Board Order R4-2012- 0175-A01 National
Pollutant Discharge Elimination System (NPDES) Permit No.
CAS004001 Waste Discharge
Requirements for Municipal Separate Storm Sewer System (MS4) Discharges within the
Coastal Watersheds of Los Angeles County, Except Those Discharges Originating from the
City of Long Beach MS4 (MS4 Permit), is currently in effect; the City of San Dimas is a
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signatory to this permit, and is subject to the Waste Discharge Requirements set forth in this
Order.
Section VI(D)(8) of the MS4 Permit applies exclusively to construction sites with
construction activities involving soil disturbance with the exception of agricultural activities.
Activities covered by this permit include but are not limited to grading, vegetation clearing,
soil compaction, paving, re-paving, and linear underground/overhead projects. The City of
San Dimas, as signatory to the MS4 Permit, shall, though their erosion and sediment control
ordinance and/or building permit, require the implementation of an effective combination
of erosion and sediment control Best Management Practices (BMPs) to prevent erosion and
sediment loss, and the discharge of construction wastes.
Section
401 Under Section 401 of the federal CWA, an activity involving discharge into a water body must
obtain a federal permit and a State Water Quality Certification to ensure that the activity will
not violate established water quality standards. The SWRCB’s and RWQCB’s jurisdiction also
extend to all “waters of the State” when no WOTUS are present, including wetlands and nonwetland waters of the State (isolated and non-isolated). The USEPA is the federal regulatory
agency responsible for implementing the CWA. However, it is the SWRCB, in conjunction
with the nine RWQCBs, who has been delegated the responsibility of administering the water
quality certification (Section 401) program.
MigratoryBirdTreatyAct
of1918 The Migratory Bird Treaty Act (MBTA) of 1918 (16 USC 703–711), as amended in 1972,
makes it unlawful at any time, by any means or in any manner, unless permitted by
regulations, to “pursue; hunt; take; capture; kill; attempt to take, capture, or kill; possess;
offer for sale; sell; offer to barter; barter; offer to purchase; purchase; deliver for shipment;
ship; export; import; cause to be shipped, exported or imported; deliver for transportation;
transport or cause to be transported; carry or cause to be carried; or receive for shipment,
transportation, carriage, or export, any migratory bird; any part, nest, or eggs of any such
bird; or any product, whether or not manufactured, which consists, or is composed in whole
or part, of any such bird or any part, nest, or egg thereof. . . .” (16 USC 703).
The MBTA covers the taking of any nests or eggs of migratory birds, except as allowed by
permit pursuant to 50 CFR, Part 21. This regulation seeks to protect migratory birds and
active nests. The MBTA protects over 800 species, including geese, ducks, shorebirds,
raptors, songbirds, and many relatively common species. Bird species protected under the
provisions of the MBTA include all species native to the United States or its territories, which
are those that occur as a result of natural biological or ecological processes. The MBTA does
not protect non-native species whose occurrences in the U.S. are solely the result of
intentional or unintentional human-assisted introduction. The List of Migratory Birds (50
CFR 10.13) was updated by the USFWS (effective August 30, 2023) (USFWS 2023a).
In 1972, the MBTA was amended to include protection for migratory birds of prey
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amendment: Accipitridae (kites, hawks, and eagles); Cathartidae (New World vultures);
Falconidae (falcons and caracaras); Pandionidae (ospreys); Strigidae (typical owls); and
Tytonidae (barn owls). The provisions of the 1972 amendment to the MBTA protect all
species and subspecies of these families.
BaldandGoldenEagleProte
ctionAct The Bald and Golden Eagle Protection Act (16 USC 668) provides for the protection of bald
eagle (Haliaeetusleucocephalus) and golden eagle (Aquilachrysaetos) by prohibiting, except
under certain specified conditions, the taking, possession, and commerce of such birds. The
1972 amendments increased penalties for violating provisions of the Act and strengthened
other enforcement measures. A 1978 amendment authorized the Secretary of the Interior to
permit the taking of golden eagle nests that interfere with resource development or recovery
operations.
The Bald and Golden Eagle Protection Act defines "take" as "pursue, shoot, shoot at, poison,
wound, kill, capture, trap, collect, molest or disturb." Regulations further define "disturb" as
“to agitate or bother a bald or golden eagle to a degree that causes, or is likely to cause, based
on the best scientific information available, 1) injury to an eagle, 2) a decrease in its
productivity, by substantially interfering with normal breeding, feeding, or sheltering
behavior, or 3) nest abandonment, by substantially interfering with normal breeding,
feeding, or sheltering behavior" (50 CFR 22.6).
In addition to immediate impacts, this definition also covers effects that result from humaninduced alterations initiated around a previously used nest site during a time when eagles
are not present, if, upon the eagle’s return, such alterations agitate or bother an eagle to a
degree that interferes with or interrupts normal breeding, feeding, or sheltering habits, and
causes injury, death, or nest abandonment.
A 1994 Memorandum from President William Clinton to the heads of Executive Agencies and
Departments established the policy concerning collection and distribution of eagle feathers
for Native American religious purposes. PreventionandControlofInvasiveSpecies– ExecutiveOrder13112 Executive Order 13112 (February 3, 1999) directs all federal agencies to work cooperatively
to prevent and control the introduction of invasive, non-native species in a cost-effective and
environmentally sound manner to minimize their economic, ecological, and human health
impacts. Executive Order 13112 established the National Invasive Species Council made up
of federal agencies and departments and a supporting Invasive Species Advisory Committee
composed of State, local, and private entities. The Invasive Species Council and Advisory
Committee oversees and facilitates implementation of the Executive Order, including
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State
CaliforniaEnvironmentalQuali
tyAct CEQA (13 PublicResourcesCode Sections 21000 et seq.) is a statute that requires State and
local agencies to identify the significant environmental impacts of their actions and to avoid
or mitigate those impacts, if feasible. The CEQA Guidelines (14 CaliforniaCodeofRegulations
Chapter 3) are the regulations that explain and interpret the law for both public agencies and
private development required to administer CEQA. The CEQA Guidelines specify that a
project has a significant impact to the environment if, among other things, it has the potential
to “substantially degrade the quality of the environment; substantially reduce the habitat of
a fish or wildlife species; cause a fish or wildlife population to drop below self-sustaining
levels; threaten to eliminate a plant or an animal community; substantially reduce the
number or restrict the range of an Endangered, Rare, or Threatened species. . . .” (CEQA
Guidelines Section 15065[a][1]).
With regards to plants and animals, Section 15380 of the CEQA Guidelines independently
defines “Endangered” and “Rare” species separately from the definitions of the California
Endangered Species Act (CESA). Under CEQA, Endangered species of plants or animals are
defined as those whose survival and reproduction in the wild are in immediate jeopardy,
while Rare species are defined as those that (1) have such low numbers that they could
become Endangered if their environment worsens or (2) are likely to become endangered
within the foreseeable future (i.e., “threatened” as used in the FESA).
In addition, a Lead
Agency can consider a non-listed species (e.g., species with a California Rare Plant Rank
[CRPR], California Species of Special Concern, or species of Local Concern) to be treated as if
it were Endangered, Rare, or Threatened for the purposes of CEQA if the species can be
shown to meet the criteria in the definition of “Rare” or “Endangered” in the Project region.
The CEQA Guidelines designate certain “trustee agencies” that have jurisdiction by law over
natural resources affected by a project which are held in trust for the people of California.
CDFW is the trustee responsible for conservation, protection, and management of wildlife,
native plants, and habitat necessary to maintain biologically sustainable populations.
Trustee agencies are generally required to be notified of CEQA documents relevant to their
jurisdiction, whether or not these agencies have actual permitting authority or approval
power over aspects of the underlying project. CDFW shall provide the requisite biological
expertise to review and comment upon environmental documents and impacts arising from
project activities and shall make recommendations regarding those resources held in trust
for the people of California (CaliforniaFishandGameCode §1802).
CaliforniaEndangeredSpeci
esAct The State of California implements the CESA, which is enforced by the CDFW. While the
provisions of the CESA are similar to the FESA, CDFW maintains a list of California
Threatened and Endangered species, independent of the FESA Threatened and Endangered
species list. It also lists species that are considered Rare and Candidates for listing, which
also receive protection. The California list of Endangered and Threatened species is
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contained in Title 14, Sections 670.2 (plants) and 670.5 (animals) of the CaliforniaCodeof
Regulations.
State-listed Threatened and Endangered species are protected under provisions of CESA.
Activities that may result in take of individuals (defined in CESA as acts to “hunt, pursue,
catch, capture, or kill, or attempt to hunt, pursue, catch, capture, or kill”) are regulated by
CDFW. While habitat degradation or modification is not included in the definition of “take”
under CESA, the CDFW has interpreted “take” to include the destruction of nesting, denning,
or foraging habitat necessary to maintain a viable breeding population of protected species.
If it is determined that the “take” would not jeopardize the continued existence of the species,
an Incidental Take Permit (ITP) can be issued by CDFW per Section 2081 of the California
CodeofRegulations. If a State-listed species is also federally listed, and the USFWS has issued
an ITP that satisfies CDFW’s requirements, CDFW may issue a consistency finding in
accordance with Section 2080.1 of the
CaliforniaFishandGameCode.
CaliforniaFishandGam
eCode CDFW administers the CaliforniaFishandGameCode. Particular sections of the Code are
applicable to natural resource management.
Native Plant
Protection Sections 1900–1913 of the CaliforniaFishandGameCode were developed to preserve,
protect, and enhance Endangered and Rare plants in the State of California. The act requires
all State agencies to use their authority to carry out programs to conserve Endangered and
Rare native plants. Provisions of the Native Plant Protection Act prohibit the taking of listed
plants from the wild and require notification of the CDFW at least ten days in advance of any
change in land use that would adversely impact listed plants. This allows the CDFW to
salvage listed plant species that would otherwise be destroyed.
Unlawful Take or Destruction of
Nests or Eggs These sections duplicate federal protection under the MBTA. Section 3503 of the California
FishandGameCode makes it unlawful to take, possess, or destroy any bird’s nest or any
bird’s eggs. Further, any birds in the orders Falconiformes or Strigiformes (i.e., birds of prey,
such as hawks, eagles, and owls) and their nests and eggs are protected under Section 3503.5
of the CaliforniaFishandGameCode. Section 3513 of the
CaliforniaFishandGameCode
prohibits the take and possession of any migratory nongame bird, as designated in the MBTA.
California Fully Protected
Species The State of California created the “Fully Protected” classification in an effort to identify and
provide additional protection to those animals that are rare or that face possible extinction.
Lists were created for fish (§ 5515), amphibians, and reptiles (§ 5050), birds (§ 3511), and
mammals (§ 4700). Most of the species on these lists have subsequently been listed under
the State and/or Federal Endangered Species Acts; however, some have not been formally
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listed. Fully protected species may not be taken or possessed at any time, except as provided
in Sections 2081.7, 2081.9, or 2835. CDFW is unable to authorize the issuance of permits or
licenses to take these species, except for necessary scientific research. California Fish and Game Code (Sections 1600 through 1616) CaliforniaFishandGameCode Sections 1600 et seq. establish a process to ensure that
projects conducted in and around lakes, rivers, or streams do not adversely impact fish and
wildlife resources or, when adverse impacts cannot be avoided, ensures that adequate
mitigation and/or compensation is provided.
CaliforniaFishandGameCodeSection 1602 requires any person, State, or local governmental
agency or public utility to notify CDFW before beginning any activity that will do one or more
of the following:
substantially obstruct or divert the natural flow of a river, stream, or lake; substantially change or use any material from the bed, channel, or bank of a river,
stream, or lake; or deposit or dispose of debris, waste, or other material containing crumbled, flaked, or
ground pavement where it can pass into a river, stream, or lake.
Section 1602 of the CaliforniaFishandGameCode applies to all perennial, intermittent, and
ephemeral rivers, streams, and lakes in the State. CDFW’s regulatory authority extends to
include riparian habitat (including wetlands) supported by a river, stream, or lake regardless
of the presence or absence of hydric soils and saturated soil conditions.
Generally, CDFW
takes jurisdiction to the top bank of the stream or to the outer limit of the adjacent riparian
vegetation (outer drip line), whichever is greater. Notification is generally required for any
project that will take place in or in the vicinity of a river, stream, lake, or their tributaries.
This includes rivers or streams that flow at least periodically or permanently through a bed
or channel with banks that support fish or other aquatic life and watercourses having a
surface or subsurface flow that support or have supported riparian vegetation. A Section
1602 Lake or Streambed Alteration Agreement would be required if impacts to identified
CDFW jurisdictional areas occur.
CaliforniaPorter‐CologneWaterQuality
ControlAct The Porter-Cologne Water Quality Control Act (Porter-Cologne) broadly defines “waters of
the State” as any surface water or groundwater, including saline waters, within the
boundaries of the State.” In 2020, the Office of Administrative Law began implementing the
State Wetland Definition and Procedures for Discharges of Dredged or Fill Material to waters
of the State. Under these new regulations, the SWRCB and its nine RWQCBs assert
jurisdiction over all existing WOTUS, and all waters that would have been considered
WOTUS under any historical definition.
Impacts to WOTUS are authorized by the RWQCBs through a Water Quality Certification per
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would be authorized by Waste Discharge Requirements (WDRs) issued by the RWQCB,
pursuant to Porter-Cologne.
Pursuant to Porter-Cologne, the SWRCB and the nine RWQCBs may require permits (known
as “Waste Discharge Requirements” or WDRs) for the fill or alteration of the waters of the
State. The term “waters of the State” is defined as “any surface water or groundwater,
including saline waters, within the boundaries of the state” (CaliforniaWaterCode, Section
13050[e]). The SWRCB and RWQCB have interpreted their authority to require WDRs to
extend to any proposal to fill or alter waters of the State, even if those same waters are not
under USACE jurisdiction. Pursuant to this authority, the State and Regional Boards may
require the submission of a “report of waste discharge” under Section 13260, which is
treated as an application for WDRs.
Porter-Cologne charges the SWRCB and the nine RWQCBs statewide with protecting water
quality throughout California. Typically, the SWRCB and RWQCB act in concert with the
USACE under Section 401 of the CWA in relation to permitting fill of federal WOTUS.
However, SWRCB and the RWQCBs may require permits (i.e., WDRs) for the fill or alteration
of the waters of the State that are outside WOTUS.
StateWaterResourcesControlBoardResolution
No.2019‐0015 The California Code of Regulations, Title 23, Section 3831(w) states that “all waters of the
United States are also ‘waters of the state.’” This regulation has remained in effect despite
Supreme Court decisions such as Rapanos and SWANCC, which added limitations to what
could be considered a WOTUS. Because the interpretation of WOTUS in place at the time §
3831(w) was adopted was broader than any post-Rapanos or postSWANCC regulatory definitions that incorporated more limitations into the scope of federal jurisdiction, it is
consistent with the Water Boards’ intent to include both historic and current definitions of
WOTUS into the SWRCBs wetland jurisdictional framework.
As set forth in Resolution No. 2009-0026, although the State of California has historically
relied primarily on requirements in the CWA to protect wetlands, U.S.
Supreme Court rulings
reducing the jurisdiction of the CWA over wetland areas by limiting the definition of WOTUS
necessitated the use of California’s independent authorities under PorterCologne to protect these vital resources.
The inclusion of both current and historic definitions of WOTUS ensures some regulatory
stability in an area that has otherwise been in flux. The status of a WOTUS may only be used
to establish that a wetland or water qualifies as waters of the State; it cannot be used to
exclude a wetland or water from qualifying as waters of the State. In other words, wetlands
that are categorically excluded from qualifying as a WOTUS may nevertheless qualify as
waters of the State under another jurisdictional category. Examples of waters of the State
include (but are not limited to) ephemeral streams and isolated wetlands.
On April 2, 2019, the SWRCB adopted Resolution No. 2019-0015, Amendment to the Water
Quality Control Plan for Ocean Waters of California and the Water Quality Control Plan for
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Wetland Definition and Procedures for Discharges of Discharges of Dredged or Fill Material
to Waters of the State (Procedures) for inclusion in the forthcoming Water Quality Control
Plan for Inland Surface Waters and Enclosed Bays and Estuaries and Ocean Waters of
California (SWRCB 2019).
On January 26, 2021, the Superior Court in
SanJoaquinTributariesAuthorityv.California
StateWaterResourcesControlBoard issued a judgment
upholding the adoption of the
Procedures as part of the (1) California Ocean Plan and (2) Inland Surface Waters and
Enclosed Bays and Estuaries Water Quality Control Plan (ISWEBE Plan) for WOTUS as
defined by the CWA.
On April 6, 2021, the SWRCB issued Resolution No. 2021-0012 confirming that the “State
Wetland Definition and Procedures for Discharges of Dredged or Fill Material to Waters of
the State” (1) are in effect as state policy for water quality control for all waters of the State
and (2) shall be applied via the inland surface waters and enclosed bays and estuaries plan
to only waters of the United States. (SWRCB 2021).
The SWRCB and its nine RWQCBs have the authority to regulate the discharge of dredged or
fill material under § 401 CWA and Porter-Cologne. Dischargers that obtain a federal permit
or license that authorizes impacts to waters of the U.S. (i.e., waters that are within federal
jurisdiction), such as § 404 CWA and § 10 of the Safe Rivers and Harbors Act, must obtain
certification from the SWRCB or a RWQCB to ensure that the discharge does not violate State
water quality standards or any other appropriate requirement of State law. When a
discharge is proposed to waters outside of federal jurisdiction, the SWRCB and the RWQCBs
regulate the discharge under Porter-Cologne through the issuance of WDRs.
ConstructionGeneralPermit;Order2009‐
0009‐DWQ If a project will disturb one or more acres of soil during construction, project owners are
required by the SWRCB to obtain coverage under a General Permit for Discharges of Storm
Water Associated with Construction Activity (Construction General Permit Order 2009 0009
DWQ, as authorized by § 402 CWA, [NPDES permit]). The
Construction General Permit
requires potential dischargers of pollutants into waters of the U.S. to prepare a site-specific
Stormwater Pollution Prevention Plan, which establishes enforceable limits on discharges,
requires effluent monitoring, designates reporting requirements, and requires construction
BMPs to reduce or eliminate point and non-point source
discharges of pollutants.
Additionally, BMPs must be maintained, inspected before and after each precipitation event,
and repaired or replaced as necessary. The SWRCB authorizes Construction General Permits.
For projects that would disturb less than one acre of soil, applicants for grading permits
pursuant to the proposed Project would be required to comply with the WDRs for Municipal
Separate Storm Sewer System (MS4) Discharges within the Coastal Watersheds of Los
Angeles County (except those discharges originating from the City of Long Beach MS4), Order
No. R4-2012-0175 as mended by State Water Board Order WQ 2015- 0075 and Los Angeles
Water Board Order R4-2012-0175-A01 NPDES Permit No. CAS004001 (referred to as the
MS4 Permit), to which the City of San Dimas is a Permittee. The MS4 Permit applies to the
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discharge of pollutants from anthropogenic sources into WOTUS through stormwater and
urban runoff conveyance systems, including flood control facilities (e.g., storm drains). Section IV(D)(8)(d)(1) of the MS4 applies to construction sites of less than one acre and
requires the implementation of an effective combination of erosion and sediment control
BMPs to prevent erosion and sediment loss. Sections IV(D)(8)(e) and IV(D)(8)(f) of the MS4
require operators of public and private construction sites within its jurisdiction to select,
install, implement, and maintain BMPs that comply with its erosion and sediment control
ordinance, and state that the requirements contained in this part apply to all activities
involving soil disturbance with the exception of agricultural activities.
Activities covered by
this permit include but are not limited to grading, vegetation clearing, soil compaction,
paving, re-paving, and linear underground/overhead projects. Grading projects of less than
one acre would, with compliance with the Los Angeles County MS4 Permit, minimize or avoid
potential violations of water quality standards or waste discharge requirements, and would
not substantially degrade surface or groundwater quality.
Applicants for grading permits pursuant to the proposed Project would be required to
comply with § IV(D)(8)(d) of the MS4 Permit, which requires construction BMPs to reduce
or eliminate point and non-point source discharges of pollutants, including sediment.
Regional
SignificantEcologicalAreas
(SEAs) The SEA Program was originally established as a part of the 1980 County General Plan, to
help conserve the genetic and physical diversity within Los Angeles County by designating
biological resource areas capable of sustaining themselves into the future. The General Plan
2035 (General Plan) updated the SEA boundary map, goals, and policies in 2015.
SEAs are places where the County deems it important to facilitate a balance between
development and biological resource conservation. Where occurring within SEAs,
development activities are carefully guided and reviewed with a key focus on site design as
a means for conserving fragile resources such as streams, woodlands, and Threatened or
Endangered species and their habitats.
The SEA Ordinance (Title 22 Planning and Zoning Code) implements the goals and policies
of the General Plan by establishing permitting requirements, design standards, and review
processes for development within SEAs. The goal of the SEA Ordinance is to guide
development to the least impactful areas on a property to avoid adverse impacts to biological
resources (LACRP 2019, pp. 6-7).
CityofSanDimasMunicipalCode–
TreePreservation Chapter 18.162 Tree Preservation Ordinance of the San Dimas Municipal Code states the goal
of preserving and protecting the mature significant trees, as well as other trees which are
determined to be desirable, growing within the City. A “mature significant tree” is defined as
“any tree within the city of an oak genus which measures eight inches or more in trunk
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diameter and/or any other species of trees which measure ten inches or more in trunk
diameter and/or a multi-trunk tree(s) having a total circumference of thirty-eight inches or
more; the multi-trunk tree shall include at least one trunk with a diameter of a minimum of
four inches”. Exceptions are provided in § 18.162.080.
Mature significant trees may be removed from developed property with the approval of the
Director of Development Services or Development Plan Review Board, subject to procedures
listed in Section 18.162.040. “Developed” property refers to property that has been
improved with structures, buildings, surface materials, landscaping, and similar
improvements in accordance with all City ordinances.
A tree removal permit is required for undeveloped property. No issuance of any grading or
building permits or commencement of work shall be allowed on undeveloped property prior
to the approval of a permit. No mature significant tree which conforms to the standards and
definitions of this chapter shall be removed or relocated without obtaining the written
approval of the Director of Development Services. “Undeveloped” property refers to any
parcel or parcels of land which does not contain physical man-made improvements, and may
be improved in conformance with applicable development
standards of the zoning
classification where the property is located. Undeveloped property shall also refer to any
parcel or parcels of land which may or may not contain
improvements and on which
development applications, including but not limited to, development plan review board,
variance, zone change, and subdivision, have been submitted.
4.1.2 METHODOLOGY This section summarizes survey methods used to conduct biological surveys for the Project.
Detailed methods are included in the Biological Technical Report (Psomas 2024,
Appendix B). The BSA includes approximately 96 acres. Surveys did not extend beyond the
BSA (Figure 4.4-1).
As discussed in the Introduction, Ultrasystems conducted biological surveys of the BSA in
2022. As part of the 2022 effort, Ultrasystems conducted a literature review, vegetation
mapping, general plant and wildlife surveys, habitat assessments for special status species,
and a jurisdictional assessment of potential WOTUS and waters of the State; methods for
these efforts are described in the Biological Technical Report (Psomas 2024). The Biological
Resources Evaluation prepared by Ultrasystems (2022) was used to support the IS/MND
that was publicly circulated for the Project. The City received extensive public comments on
the mitigation approach for biological resources and hired Psomas to conduct a peer review
of the Biological Resources Evaluation and ultimately to prepare a mitigation approach that
addressed public comments. Psomas conducted a field visit to verify the vegetation mapping
and habitat assessment and subsequently updated the findings and mitigation approach
based on their professional judgement. As requested by the City, this Biological Technical
Report incorporates the extensive information collected by Ultrasystems during their
literature review and 2022 biological surveys to describe existing conditions, including use
of their figures. Psomas has supplemented information with additional literature review and
observations made during Psomas’ 2023 field visit; methods for this field visit are described
below. The findings within this report are based on the professional opinion of Psomas.
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San Dimas
MCTA 20-
0005Legend
Project
Boundary
Biological Study Area
(BSA)
Key Map
Kern
County
San
Bernardin
o
Los County
Angeles
County
Ventura
County Project
Location
Orange
County
Riverside
County P a c i f i c
O c e a n
¯
Map not to
scale
Source: UtlraSystems
2022
Project Boundary and
Biological Study Area
(BSA) Figure 4.4-
1 Disclaimer: Representations on this map or illustration are intended only to indicate locations of project parameters reported in the legend. Project parameter information supplied by others (see layer credits) may not have been independently verified for accuracy by UltraSystems Environmental, Inc. This map or illustration should not be used for, and does not replace, final grading plans or other documents that should be professionally certified for development purposes.
Path:
\\gissvr\GIS\Projects\7145_SanDimas_MunicipalCode_ISMND\MXDs\BIO\7145_San_Dimas_MCTA_Project_Location _BSA_2022_10_21.mxd
(10/09/2023 JMC)
R:\Projects\SAN04\3SAN040200\Graphics\Bio_MND\ex_BSA.pdf
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LiteratureRevie
w Prior to the start of surveys, Psomas reviewed the Ultrasystems (2022) Biological Resources
Evaluation for the Project and public comments submitted on the IS/MND. Psomas then conducted an updated literature search to identify special status plants,
wildlife, habitats, and potential jurisdictional water resources reported from the vicinity of
the Project. The Project region is generally defined as the United States Geological Survey
(USGS) San Dimas quadrangle and the eight surrounding
quadrangles, with the
understanding that the northernmost quadrangles extend to elevations well outside those
found in the BSA. The following sources of information were reviewed during the literature
review:
CDFW’s California Natural Diversity Database (CNDDB); USGS Baldwin Park, San Dimas,
Ontario, La Habra, Yorba Linda, Prado Dam, Azusa, Glendora, and Mt.
Baldy 7.5-minute
quadrangles (CDFW 2023a) The California Native Plant Society’s (CNPS’) Inventory of Rare and Endangered Plants;
USGS Baldwin Park, San Dimas, Ontario, La Habra, Yorba Linda, Prado Dam, Azusa,
Glendora, and Mt. Baldy 7.5-minute quadrangles (CNPS 2023a) CDFW’s NaturalCommunitiesList (CDFW 2023b), SpecialVascularPlants,Bryophytes,and
LichensList (CDFW 2023c); and SpecialAnimals List (CDFW 2023d)
Jepson eFlora (Jepson Flora
Project 2023) Web Soil Survey data provided by the United States Department of Agriculture (USDA)’s
Natural Resources Conservation Service (NRCS) (USDA NRCS 2023a)
The National Hydric Soils List (USDA
NRCS 2023b)
The National Wetlands Inventory’s Wetland Mapper
(USFWS 2023b)
VegetationMappingandGeneral
Surveys Psomas Senior Biologists Allison Rudalevige and Jonathan Aguayo performed a general plant
and wildlife survey and verified vegetation mapping prepared by Ultrasystems on July 11,
2023. The map was updated, as necessary, based on current (i.e., July 11, 2023) conditions.
To update the existing vegetation map, an aerial photograph at a scale of 1-inch equals 400-
feet (1″=400′) was overlaid with the 2022 UltraSystems vegetation layer.
These base layers
were loaded onto Avenza Maps application on an Apple iPad.
Vegetation that was
inaccessible due to steep topography or access issues was mapped from a distance with the
use of binoculars.
Nomenclature of vegetation types generally follows that of AManualofCaliforniaVegetation
(CNPS 2023b), which is the most current vegetation classification system used by CDFW for
assessing sensitive natural communities (CDFW 2023b).
Nomenclature of plant taxa
conform to the
SpecialVascularPlants,Bryophytes,andLichensList (CDFW
2023c) for special
status species and the Jepson eFlora (Jepson Flora Project 2023) for all other taxa.
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Representative photographs of the BSA are included in the Biological Technical Report
(Appendix B).
All plant and wildlife species detected during the survey were documented in field notes and
are listed in the Biological Technical Report (Appendix B). Active searches for reptiles and
amphibians included lifting, overturning, and carefully replacing rocks and debris. Birds
were identified by visual and auditory recognition. Surveys for mammals were conducted
during the day and included searching for and identifying diagnostic signs, including scat,
footprints, scratch-outs, dust bowls, burrows, and trails. Taxonomy and nomenclature for
wildlife follows the SpecialAnimalsList (CDFW 2023c) for special status species and, for
other species, Crother (2017) for amphibians and reptiles, the American Ornithological
Society (AOS 2023) for birds, and the Smithsonian National Museum of Natural History
(SNMNH 2011) for mammals.
JurisdictionalAssessme
ntJurisdictional water resources include WOTUS under the regulatory authority of the USACE;
waters of the State under the regulatory authority of the RWQCB; and the bed, bank, and
channel of all lakes, rivers, and/or streams (and associated riparian vegetation), under the
regulatory authority of CDFW. A formal jurisdictional delineation was not performed.
However, information from the National Wetlands Inventory Wetland Mapper was used to
identify potential jurisdictional water resources in the BSA.
4.1.3 EXISTINGCONDITIONS
PhysicalEnvironmentalSe
tting The BSA is located in southeastern Los Angeles County. The BSA is located in the San Jose
Hills, between the San Gabriel Mountains that are approximately four miles to the north and
the Puente-Chino Hills that are approximately five miles to the south.
Walnut Creek is located
along the northern boundary of the San Jose Hills; it is approximately
0.5 mile north of the
BSA and is vegetated with oak woodlands along the creek.
Bonelli Regional
Park/Puddingstone Reservoir and associated open space areas are located at the eastern end
of the San Jose Hills; it is approximately 1.3 miles east of the BSA (and across State Route
[SR]-57). Open space hillsides, known as the Walnut Islands, are located in the southern
portion of the San Jose Hills; they are approximately 0.5 mile to the southeast of the BSA (and
across I-10). All of these open space areas are within the designated East San Gabriel Valley
SEA. High density development and roadways surround each of these areas just outside their
designated SEA boundaries.
The BSA is located in an area consisting of a mix of residential development interspersed
with undeveloped canyons, ridgelines, and slopes. Higher density residential development
and roadways surround the BSA in all directions, although there is some additional natural
open space located to the south between East Covina Hills Road and I-10.
Within the BSA, single family residences are generally located on the ridges with parcels that
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from approximately 680 to 980 feet above mean sea level (msl).
Topography slopes down
moderately from Calle Cristina to East Covina Hills Road. There are no blueline streams in
the BSA. Areas of herbaceous vegetation are periodically mowed. VegetationTyp esFourteen vegetation types and other landcovers were mapped in the BSA (Table 4.4-1,
Figure 4.4-2). Table 4.1-1, Vegetation Types and Other Areas in the BSA, below describes the
vegetation composition in the BSA; the corresponding vegetation classification as provided
by AManualofCaliforniaVegetation (CNPS 2023b); and whether the vegetation type would
be considered a sensitive natural community (CDFW 2023b).
TABLE4.4
VEGETATIONTYPESANDOTHERAR ‐1
EASINTHEBSA
Sensitive
Vegetation
Community
TotalVegetatio
AManualofCalif n
ornia
VegetationAllianc
e
inBS
VegetationTypeorOther A
Area
CoastalSageScrub
(CDFW2023
b)
(acres)
Artemisiacalifornica –
(Salvia
leucophylla) Shrubland
Alliance
California Sagebrush Scrub
(Disturbed)
California Buckwheat Scrub
No
No
No
0.089
2.000
1.927
Eriogonumfasciculatum
Shrubland Alliance
Eriogonumfasciculatum
Shrubland California Buckwheat Scrub
(Disturbed) Alliance
Artemisiacalifornica –
(Salvia
leucophylla) Shrubland
Alliance
with
Eriogonumfasciculatum
Shrubland Alliance
California Sagebrush – California
Buckwheat
Scrub
No 0.251
3.480 Artemisiacalifornica –
Salvia
mellifera Shrubland
Alliance
California Sagebrush – Black
Sage Scrub
Coast Prickly Pear Scrub
No
Opuntialittoralis –
Opuntiaoricola
–
Cylindropuntiaprolifer
a
Shrubland Alliance
Yes 3.848
SubtotalCoastalSag
eScrub
NativeWoodland
11.595
JuglansCalifornia
Forest & California Walnut
Groves
Yes
Yes
No
27.057
12.529
Woodland
Juglans Alliance California
Forest & California Walnut Groves
(Disturbed)
Coast Live Oak Woodland
(Disturbed)
Woodland
Quercus Alliance agrifolia
Woodland & 1.801 Forest
SubtotalNativeWo Alliance
odland
Non‐NativeWoodlan
d
41.387
Schinus (molle,
terebinthifolius) –
Myoporumlaetum
Forest &
Woodland Semi-Natural
Alliance
Pepper Tree
Groves
No 0.657
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TABLE4.4‐1
VEGETATIONTYPESANDOTHERAR
EASINTHEBSA
Sensitive
Vegetation
Community
(CDFW2023
b)
TotalVegetatio
n
inBSA
AManualofCalif
ornia
VegetationAllianc
e
VegetationTypeorOther
Area
Eucalyptus Groves
(acres)
Eucalyptus spp. –
Ailanthus
altissima –
Robiniapseudoacacia
Woodland Semi-Natural
Alliance
No 0.797
SubtotalNon‐NativeW
oodland
Non‐NativeHerbaceous
1.454
Brassicanigra –
Centaurea
(solstitialis, melitensis)
Herbaceous
Semi-Natural Alliance
Upland Mustards or Star-thistle
Fields
No
No
9.179
Brassicanigra –
Centaurea
(solstitialis, melitensis)
Herbaceous
Semi-Natural Alliance
Upland Mustards or Star-thistle
Fields
(mowed)
12.094
SubtotalNon‐NativeHer
baceous
DevelopedAreas
21.273
Developed/Ornamental
SubtotalDeveloped
Areas
Total
N/A No 20.954
20.954
a Ranked as sensitive based on less than 10 stands sampled; may be more 96.663 b widespread (CDFW 2023d). This blended community would be characterized more as riparian herb than southern black willow forest; therefore, it would not be
considered a sensitive community. BSA: Biological Survey Area
CoastalSageS
crub Coastal sage scrub communities mapped in the BSA consist of California sagebrush scrub
(disturbed), California buckwheat scrub, California buckwheat scrub (disturbed), California
sagebrush – California buckwheat scrub, California sagebrush – black sage scrub, and coast
prickly pear scrub.
California Sagebrush Scrub
(Disturbed)
Approximately 0.089 acre of California sagebrush scrub (disturbed) occurs in the BSA. It is
located in a small patch in the southern half of the BSA. In the BSA, this vegetation type is
dominated by California sagebrush (Artemisiacalifornica). Other native species observed
include laurel sumac (Malosmalaurina), phacelia (Phacelia sp.), and large-bracted morningglory (Calystegiamacrostegia). It is categorized as disturbed because it is degraded by the
presence of non-native species such as black mustard (Brassica nigra) and tocalote
(Centaureamelitensis).
The California sagebrush scrub (disturbed) in the BSA corresponds to the Artemisia
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Legend
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Boundary Conservation
Easement
Parcel Coastal Sage
ScrubCalifornia Sagebrush Scrub
(Disturbed)
California Buckwheat Scrub Rancho
California Buckwheat Scrub (Disturbed)
California Sagebrush - California
Buckwheat Scrub
California Sagebrush - Black Sage Scrub
Coast Prickly Pear Scrub Native
Woodland California Walnut
Groves
California Walnut Groves
(Disturbed)
Coast Live Oak Woodland Non-Native (Disturbed) Woodland Pepper Tree Groves
Eucalyptus Non-Native Groves Herbaceous Upland Mustards or Star-thistle Fields Upland Mustards or Star-thistle Fields
(Mowed)
Developed Areas
Developed/Ornamental
²
0 0
175
50 350
Feet
100
Meters Scale:
1:4,200
Data Source: Vegetation map developed by
UltraSystems (2022)
and updated by Psomas
(2023)
Aerial Source: Nearmap
2023
Vegetation Types and Other
Areas
Figure 4.4-2
(Rev: 01/05/2024 PLO)
R:\Projects\SAN04\3SAN040200\Graphics\Bio_NMD\ex_VegetationTypes.pdf
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Centaurea [solstitialis, melitensis] Herbaceous Semi-Natural Alliance (CNPS 2023b). The
Artemisiacalifornica – (Artemisiacalifornica) Shrubland Alliance is not considered a
sensitive natural community by CDFW (CDFW 2023b). California Buckwheat Scrub
Approximately 2.000 acres of California buckwheat scrub occurs in the BSA. It is located in a
few small, isolated patches. This vegetation type is dominated by California buckwheat
(Eriogonumfasciculatum). A small amount of oat (Avena sp.) and grayish shortpod mustard
(Hirschfeldiaincana) is also present.
The California buckwheat scrub in the BSA corresponds to the Eriogonumfasciculatum
Shrubland Alliance (CNPS 2023b). The Eriogonumfasciculatum Shrubland Alliance is not
considered a sensitive natural community by CDFW (CDFW 2023b). California Buckwheat Scrub (Disturbed)
Approximately 1.927 acres of California buckwheat scrub (disturbed) occurs in the BSA. It is
located in patches along East Covina Hills Road. In the BSA, this vegetation type consists of
an open cover of California buckwheat shrubs. These areas are characterized as disturbed
because there is a low cover of California buckwheat and they are heavily degraded by the
presence of non-native grasses and forbs, including grayish shortpod mustard, black
mustard, ripgut grass (Bromus diandrus), oat, and prickly lettuce (Lactucaserriola). Some
native species are also present, including rocky malacothrix (Malacothrixsaxatilis), phacelia,
and Wright’s jimsonweed (Daturawrightii).
The California buckwheat scrub (disturbed) in the BSA corresponds to the Eriogonum
fasciculatum Shrubland Alliance mixed with the Brassicanigra – Centaurea [solstitialis,
melitensis] Herbaceous Semi-Natural Alliance in
AManualofCaliforniaVegetation (CNPS
2023b). As noted above, the Eriogonumfasciculatum Shrubland Alliance is not considered a
sensitive natural community by CDFW (CDFW 2023b).
California Sagebrush – California
Buckwheat Scrub
Approximately 0.251 acre of California sagebrush – California buckwheat scrub occurs in the
BSA. It is located near the northeastern edge of the BSA. In the BSA, this vegetation type is
co-dominated by California sagebrush and California buckwheat. A small amount of grayish
shortpod mustard is also present.
The California sagebrush – California buckwheat scrub in the BSA corresponds most closely
to the Artemisia californica – Eriogonumfasciculatum Association in AManualofCalifornia
Vegetation (CNPS 2023b). This Association is not considered a sensitive natural community
by CDFW (CDFW 2023b).
California Sagebrush – Black
Sage Scrub
Approximately 3.480 acres of California sagebrush – black sage scrub occurs in the BSA. It is
located on a slope near the southwest corner of the BSA. In the BSA, this vegetation type isMUNICIPAL CODE TEXT AMENDMENT 20-
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co-dominated by California sagebrush and black sage
(Salviamellifera). A small amount of
oat and grayish shortpod mustard is also present.
The California sagebrush – black sage scrub in the BSA corresponds to the Artemisia
californica – Salvia mellifera Shrubland Alliance in
AManualofCaliforniaVegetation(CNPS
2023b). The Artemisiacalifornica – Salvia mellifera Shrubland Alliance is not considered a
sensitive natural community by CDFW (CDFW 2023b).
Coast Prickly Pear
Scrub
Approximately 3.848 acres of coast prickly pear scrub occurs in the BSA. It is located in the
southwest corner of the BSA. This vegetation type is characterized by the presence of
scattered patches of coast prickly pear (Opuntialittoralis) that is greater than 30 percent
relative cover and is mixed with other coastal sage scrub species. The dominant species
growing between the patches of cactus include California buckwheat and California
sagebrush with a small amount deerweed (Acmisponglaber). A member of the Boraginaceae
(either dessicated [dried out] popcorn flower [Cryptantha sp.] or fiddleneck [Amsinckia sp.])
was also observed but was not identifiable due to the timing of the survey, which was well
past the blooming period. A small amount of non-native vegetation is present and includes
tocalote and grayish shortpod mustard.
The coast prickly pear scrub in the BSA corresponds to the Opuntia littoralis – Opuntia
oricola – Cylindropuntiaprolifera Shrubland Alliance in AManualofCaliforniaVegetation
(CNPS 2023b). The Opuntialittoralis – Opuntiaoricola –
Cylindropuntiaprolifera Shrubland
Alliance is considered a sensitive natural community by CDFW (CDFW 2023b).
NativeWoodla
nd Native woodland communities mapped in the BSA consist of California walnut groves,
California walnut groves (disturbed), and coast live oak woodland (disturbed). California Walnut
Groves
Approximately 27.057 acres of California walnut groves occurs in the BSA. They are located
on slopes and drainage edges throughout the BSA. In the BSA, this vegetation type is
dominated by southern California black walnut (Juglanscalifornica) that is more than 50
percent relative cover. Some areas have a closed canopy while other areas have a canopy
that is open; a few individual trees are mapped. A few scattered coast live oak (Quercus
agrifolia) are also present. The understory contains a mix of native and non-native species.
Native species include phacelia, chilicothe (Marah macrocarpa), and western poison oak
(Toxicodendrondiversilobum). Non-native species include tocalote, Italian thistle (Carduus
pycnocephalus ssp. pycnocephalus), grayish shortpod mustard, and oats.
The California walnut groves in the BSA correspond to the Juglans californica Forest &
Woodland Alliance in AManualofCaliforniaVegetation (CNPS 2023b). The Juglans
californica Forest & Woodland Alliance is considered a sensitive natural community by
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CDFW (CDFW 2023b). Southern California black walnut is also considered a special status
plant species and is discussed below in Section 3.7.
California Walnut Groves
(Disturbed)
Approximately 12.529 acres of California walnut groves (disturbed) occurs in the BSA. They
are located on slopes throughout the BSA. This vegetation type contains an open canopy of
southern California black walnut that is more “savannah-like” than the undisturbed form of
California walnut groves (described above). The understory and areas between the trees are
dominated by non-native species such as grayish shortpod mustard and oat.
The California walnut groves (disturbed) in the BSA corresponds to the Juglanscalifornica
Forest & Woodland Alliance mixed with the Brassicanigra – Centaurea [solstitialis,
melitensis] Herbaceous Semi-Natural Alliance in
AManualofCaliforniaVegetation(CNPS
2023b). The Juglanscalifornica Forest & Woodland Alliance is considered a sensitive natural
community by CDFW (CDFW 2023b).
Coast Live Oak Woodland
(Disturbed)
Approximately 1.801 acres of coast live oak woodland (disturbed) occurs in the BSA. It is
located on slopes throughout the BSA. This vegetation type is codominated by coast live oak and non-native species such as pepper (Schinusmolle). The understory and areas between
trees contain non-native species such as grayish shortpod mustard and oat. It is categorized
as disturbed because coast live oak makes up less than 50 percent relative cover of the tree
layer and because it is mixed with non-native trees.
The coast live oak woodland (disturbed) in the BSA corresponds to the Quercusagrifolia
Woodland & Forest Alliance mixed with the Schinus (molle, terebinthifolius) – Myoporum
laetum Forest & Woodland Alliance in
AManualofCaliforniaVegetation(CNPS 2023b). The
Quercusagrifolia Woodland & Forest Alliance is not considered a sensitive natural
community by CDFW (CDFW 2023b).
Non‐NativeWoodl
and Non-native woodland communities mapped in the BSA consist of pepper tree groves and
eucalyptus groves.
Pepper Tree
Groves
Per AManualofCaliforniaVegetation, pepper tree groves occur in coastal canyons, washes,
slopes, riparian areas, and roadsides. The tree canopy is open to continuous. Shrubs are
infrequent or common while the herbaceous layer is simple to diverse.
For groves of pepper
trees, this vegetation type has greater than 60 or 80 percent relative cover in the tree layer.
Approximately 0.657 acre of pepper tree groves occurs in the BSA. It is located in small
patches adjacent to roads, either as an extension of ornamental landscaping or on natural
slopes. This vegetation type has a canopy of pepper tree (Schinusmolle). The area adjacent
to Paseo Lucinda has a turf understory while the areas adjacent to East Covina Hills Road
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have an understory dominated by non-native vegetation such as Italian thistle and
horehound (Marrubiumvulgare). Scattered native species, such as chilicothe and phacelia,
are also present. The pepper tree groves in the BSA correspond to the Schinus (molle, terebinthifolius) –
Myoporum laetum Forest & Woodland Semi-Natural Alliance in A ManualofCalifornia
Vegetation(CNPS 2023b). This Alliance is not considered a sensitive natural community by
CDFW (CDFW 2023b).
Eucalyptus
Groves
Approximately 0.797 acre of Eucalyptus groves occur in the BSA. This vegetation type is
located in patches along Calle Cristina. This vegetation type has a canopy of gum; scattered
coast live oak and pine ( The Eucalyptus groves in the BSA correspond to the Pinus sp.) are also present. Eucalyptus spp. – Ailanthus
altissima – Robiniapseudoacacia Semi-Natural Alliance in AManualofCaliforniaVegetation
(CNPS 2023b). The Eucalyptus spp. – Ailanthusaltissima – Robinia pseudoacacia SemiNatural Alliance is not considered a sensitive natural community by CDFW (CDFW 2023b).
Non‐NativeHerbace
ous Non-native herbaceous communities mapped in the BSA consist of upland mustards or starthistle fields and upland mustards or star-thistle fields (disturbed).
These areas are
dominated by non-herbaceous species, many of which are considered invasive.
Upland Mustards or Star-thistle
Fields
Approximately 9.179 acres of upland mustards or star-thistle fields occurs in the BSA. This
vegetation type occurs on slopes throughout the BSA. This vegetation type is dominated
non-native grasses and forbs, primarily grayish shortpod mustard and black mustard.
Tocalote and oats are also present. Some areas have scattered native species and intergrade
with native vegetation types such as California walnut groves and California buckwheat
scrub.
The upland mustards or star-thistle fields in the BSA correspond to the Brassicanigra –
Centaurea (solstitialis, melitensis) Herbaceous Semi-Natural Alliance in AManualof
CaliforniaVegetation(CNPS 2023b). The Brassicanigra – Centaurea (solstitialis, melitensis)
Herbaceous Semi-Natural Alliance is not considered a sensitive natural community by CDFW
(CDFW 2023b).
Upland Mustards or Star-thistle Fields
(Mowed)
Approximately 12.094 acres of upland mustards or star-thistle fields (mowed) occurs in the
BSA. At the time of the 2023 surveys, mowed vegetation consisted primarily of a thatch of
oats with grayish shortpod mustard. Some areas had barley (Hordeumvulgare), common
sow thistle (Sonchusoleraceus), castor bean (Ricinuscommunis), Wright’s jimsonweed, and
climbing milkweed (Funastrumcynanchoides var. hartwegii).
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The upland mustards or star-thistle fields (mowed) in the BSA correspond to a mix of
Brassicanigra – Centaurea (solstitialis, melitensis) and Avena spp. – Bromus spp. Herbaceous
Semi-Natural Alliances in AManualofCaliforniaVegetation (CNPS 2023b). Neither the
Brassicanigra – Centaurea (solstitialis, melitensis) or the Avena spp. – Bromus spp.
Herbaceous Semi-Natural Alliances are considered a sensitive natural community by CDFW
(CDFW 2023b).
DevelopedAre
asDeveloped/Ornament
al
Approximately 20.954 acres of developed/ornamental areas occur in the BSA. This
landcover includes residential structures, roadways, and associated landscaping throughout
the BSA. Ornamental vegetation is varied and includes trees, shrubs, herbs, and turf grass.
Representative landscaping species include olive (Oleaeuropaea), pine, pepper, jacaranda
(Jacaranda sp.), bougainvillea (Bougainvillea sp.), night-blooming jasmine (Cestrum
nocturnum), and cultivated roses (Rosa sp.).
As this landcover is developed with associated landscaping that is primarily non-native and
ornamental, it does not correspond to a vegetation Alliance in A ManualofCalifornia
Vegetation (CNPS 2023b). These areas would not be considered sensitive natural
communities by CDFW (CDFW 2023b).
Wildlife
Vegetation in the BSA provides habitat for many wildlife species.
Common wildlife species
observed or expected to occur in the BSA are discussed below.
Fish
Most creeks and waterways in southern California are ephemeral (subject to periods of high
water flow in winter and spring and little to no flow in late summer and fall). Drainages in
the BSA would be expected to convey flow due to nuisance runoff or after precipitation
events. There is no aboveground connectivity to a larger downstream waterway. Therefore,
fish are not expected to occur in the BSA.
Amphibians
Amphibians require moisture for at least a portion of their life cycle, and many require
standing or flowing water for reproduction. Terrestrial species may or may not require
standing water for reproduction; they survive in dry areas by aestivating (i.e., remaining
beneath the soil in burrows or under logs and leaf litter and emerging only when
temperatures are low and humidity is high). Many of these species’ habitats are associated
with water, and they emerge to breed once the rainy season begins. Soil moisture conditions
can remain high throughout the year in some habitat types, depending on factors such as
amount of vegetation cover, elevation, and slope/aspect.
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Habitat for amphibians in the BSA is relatively limited due to the lack of standing or flowing
water sources. No amphibians were observed during the 2022 surveys conducted by
Ultrasystems or the 2023 surveys conducted by Psomas (Ultrasystems 2022). Amphibian
species that may occur in the BSA include western toad
(Anaxyrusboreas), Baja California
treefrog (Pseudacrishypochondriaca), and black-bellied
salamander (Batrachoseps
nigriventris).
Reptiles
Reptiles are well-adapted to life in arid habitats. They have several physiological adaptations
that allow them to conserve water. Reptiles can also become dormant during weather
extremes, allowing them to survive prolonged droughts and paucity of food (Ruben and
Hillenius 2005). Reptilian diversity and abundance typically vary with vegetation type and
character.
Common reptile species observed in the BSA during either the 2022 surveys conducted by
Ultrasystems or the 2023 surveys conducted by Psomas include common side-blotched
lizard (Utastansburiana) and western fence lizard
(Sceloporusoccidentalis) (Ultrasystems
2022). Other reptile species expected to occur include southern alligator lizard (Elgaria
multicarinata), western skink (Plestiodonskiltonianus), red racer (Coluberflagellumpiceus),
California striped racer (Coluber lateralislateralis), California kingsnake (Lampropeltis
californiae), gopher snake (Pituophiscatenifer), and southern Pacific rattlesnake (Crotalus
oreganushelleri).
Birds
A variety of bird species are expected to be residents in the BSA, using the habitats
throughout the year. Other species are present only during certain seasons. For example, the
white-crowned sparrow (Zonotrichialeucophrys) is expected to occur during the winter and
migrates to the northern forests for breeding in the spring.
The following resident bird species were observed in the BSA during either the 2022 surveys
conducted by Ultrasystems or the 2023 surveys conducted by Psomas: California quail
(Callipeplacalifornica), mourning dove (Zenaida macroura), Anna’s hummingbird (Calypte
anna), acorn woodpecker (Melanerpesformicivorus), black phoebe (Sayornisnigricans),
California scrub jay (Aphelocomacalifornica), American crow (Corvusbrachyrhynchos), oak
titmouse (Baeolophusinornatus), Bewick’s wren (Thryomanes bewickii), northern
mockingbird (Mimuspolyglottos), European starling (Sturnus vulgaris), house finch
(Haemorhousmexicanus), lesser goldfinch (Spinuspsaltria), and California towhee (Melozone
crissalis).
Migratory species observed in the BSA that are present during the nesting season include
ash-throated flycatcher (Myiarchuscinerascens) and phainopepla (Phainopeplanitens).
Wintering species that may occur in the BSA include ruby-crowned kinglet (Regulus
calendula), cedar waxwing (Bombycillacedrorum), yellow-rumped warbler (Setophaga
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Raptors (birds of prey) observed in the BSA include Cooper’s hawk (Accipitercooperii), redtailed hawk (Buteojamaicensis), and red-shouldered hawk (Buteolineatus). Other raptor
species that are expected to occur include great-horned owl (Bubovirginianus), barn owl
(Tytoalba), western screech owl (Megascopskennicottii), and American kestrel (Falco
sparverius). The turkey vulture (Cathartesaura), a scavenger, would also be expected to
occur.
Mammals
Small mammals observed in the BSA during either the 2022 surveys conducted by
Ultrasystems or the 2023 surveys conducted by Psomas include Eastern fox squirrel (Sciurus
niger), western gray squirrel (Sciurusgriseus), California ground squirrel (Otospermophilus
beecheyi), Botta’s pocket gopher (Thomomysbottae), and desert cottontail (Sylvilagus
audubonii). Medium to large-sized mammals, or their sign, observed include coyote (Canis
latrans). Other species that may occur include northern raccoon (Procyonlotor), Virginia
opossum (Didelphiavirginiana), and striped skunk
(Mephitismephitis).
Bats occur throughout most of Southern California and may use any portion of the BSA as
foraging habitat. Most of the bats that could potentially occur in the BSA are inactive during
the winter and either hibernate or migrate, depending on the species.
Bats may roost in
crevices of structures or large trees in the BSA. Bat species that may occur in the BSA for
foraging and/or roosting include Mexican free-tailed bat (Tadaridabrasiliensis), canyon bat
(Parastrellushesperus), California myotis (Myotiscalifornicus), and Yuma bat (Myotis
yumanensis).
WildlifeMovem
ent Wildlife corridors link together areas of suitable wildlife habitat that are otherwise
separated by rugged terrain, changes in vegetation, or human disturbance. The
fragmentation of open space areas by urbanization creates isolated “islands” of wildlife
habitat. In the absence of habitat linkages that allow movement to adjoining open space
areas, various studies have concluded that some wildlife species, especially the larger and
more mobile mammals, will not likely persist over time in fragmented or isolated habitat
areas because they prohibit the infusion of new individuals and genetic information
(MacArthur and Wilson 1967; Soule 1987; Harris and Gallagher 1989; Bennett 1990).
Corridors mitigate the effects of this fragmentation by (1) allowing animals to move between
remaining habitats, thereby permitting depleted populations to be replenished and
promoting genetic exchange; (2) providing escape routes from fire, predators, and human
disturbances, thus reducing the risk that catastrophic events (such as fire or disease) will
result in population or local species extinction; and (3) serving as travel routes for individual
animals as they move in their home ranges in search of food, water, mates, and other
necessary resources (Noss 1983; Farhig and Merriam 1985; Simberloff and Cox 1987; Harris
and Gallagher 1989).
It is important to note that in a large, open space area with few or no man-made or naturally
occurring physical constraints to wildlife movement, wildlife corridors (as defined above)
may not yet exist. Given an open space area that is both large enough to maintain viable
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populations of species and to provide a variety of travel routes (e.g., canyons, ridgelines,
trails, riverbeds, and others), wildlife will use these “local” routes while searching for food,
water, shelter, and mates and will not need to cross into other large, open space areas. Based
on their size, location, vegetative composition, and availability of food, some of these
movement areas (e.g., large drainages and canyons) are used for longer lengths of time and
serve as source areas for food, water, and cover, particularly for smalland medium-sized animals. This is especially true if the travel route is within a larger open space area. However,
once open space areas become constrained and/or fragmented as a result of urban
development or construction of physical obstacles (such as roads and highways), the
remaining landscape features or travel routes that connect the larger open space areas
become corridors as long as they provide adequate space, cover, food, and water and do not
contain obstacles or distractions (e.g., man-made noise, lighting) that would generally hinder
wildlife movement.
Although the BSA includes undeveloped open space mixed with residential development, it
is surrounded by higher density residential development and roadways/highways in all
directions, although there is some additional natural open space located to the south
between East Covina Hills Road and I-10. There are significant barriers to wildlife movement
surrounding the BSA, including I-10 to the south and SR-57 to the east.
More mobile species
(e.g., birds) and species that can cross through urban areas (e.g., coyotes, raccoons) may be
able to navigate through urban areas to reach larger areas of open space, such as those in the
East San Gabriel Valley SEA (e.g., Walnut Creek, Bonelli Regional Park/Puddingstone
Reservoir). However, because the BSA does not provide a connection between areas of open
space, it would not serve as a wildlife corridor. This was confirmed by reviewing the CDFW
Habitat Connectivity Viewer; the BSA is not within any area identified for wildlife movement
(e.g., Essential Connectivity Areas, Natural Landscape Blocks, or Small Natural Areas) (CDFW
2023e). Natural drainages and ridgelines serve as travel routes for local wildlife movement
within the BSA and the open space south of East Covina Hills Road. Local wildlife movement
could occur across all habitat types but is expected to be concentrated in native habitat types
with shrub and tree cover (i.e., coastal sage scrub, native woodland), and to some extent, also
in the non-native woodland. Species that are less restricted in movement (e.g., birds) and/or
are well-adapted to urbanized areas (e.g., northern raccoon, striped skunk, or coyote) are
more likely to move between the BSA and adjacent areas. Predators (e.g., coyotes) and
smaller mammals (e.g., northern raccoon and striped skunks) are known to use medium- to
low-density residential neighborhoods, golf courses, and washes for hunting and foraging,
and using washes (natural and channelized), culverts, underpasses, and city streets for
travelling (Baker and Timm 1998; Grubbs and Krausman 2009; Ng et al. 2004). Urban areas
also provide anthropogenic food sources such as discarded human food, pet food, fruit trees,
and domestic animals (Larson et al. 2020).
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SpecialStatusBiologicalRe
sources SensitiveNaturalCommu
nities Coastal Sage
Scrub
Coastal sage scrub has declined approximately 70 to 90 percent in its historic range in
California (Noss and Peters 1995). It has largely been lost to land use changes in Southern
California basins and foothills. Coastal sage scrub vegetation types have potential to support
special status plant and wildlife species. Coastal sage scrub communities mapped in the BSA
consist of California sagebrush scrub (disturbed), California buckwheat scrub, California
buckwheat scrub (disturbed), California sagebrush – California buckwheat scrub, California
sagebrush – black sage scrub, and coast prickly pear scrub. Of these, only coast prickly-pear
scrub is considered a sensitive natural community by CDFW (CDFW 2023b). The other
coastal sage scrub vegetation types may be considered of local concern.
Native
Woodlands
California walnut forests and woodlands are found only in southern California, with a very
limited distribution within that range (Quinn 1989). Walnuts can occur singly, in nearly pure
stands, or in mixtures with other trees (e.g., oak woodland). Walnut stands are often within
or near urban areas; continued development is further reducing the limited extent of this
species. The BSA includes California walnut groves and California walnut groves (disturbed);
both vegetation types are considered sensitive natural communities by CDFW (2023b).
Coast live oak woodlands are most common along the southern Coast Ranges and at low
elevations in Southern California (Schoenherr 1992). Woodlands provide habitat for many
vertebrate and invertebrate species, including food sources and cavities and cover for
nesting or roosting. Coast live oak woodland (disturbed) occurs in the BSA and provides
high-quality habitat for wildlife. The coast live oak trees in the BSA are large enough to
provide cavities for shelter (e.g., roosting) and breeding (e.g., cavitynesting) for wildlife species. Downed wood provides important cover for amphibians, reptiles, and small to
medium-sized mammals; nest sites for cavity-nesting and groundnesting birds; nutrients into the soil as they decompose; and favorable microhabitat for emerging seedlings (Tietje
et al. 2005). Coast live oak woodland is not considered a sensitive natural community but is
generally considered of local concern because of the habitat value that it provides.
Jurisdictional
Resources
A formal jurisdictional delineation was not performed by UltraSystems or Psomas in the BSA.
Elements of the literature review (i.e., aerial imagery, the USGS topographic quadrangle, web
soil survey data [USDA NRCS 2023], National Hydric Soils List [USDA NRCS 2023], and the
National Wetlands Inventory’s Wetland Mapper [USFWS 2023]) were used to identify
potential jurisdictional water resources.
Based on the literature review, potential jurisdictional waters occur in the BSA
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wetlands and riverine areas within the BSA. These include Palustrine forested areas with a
temporarily flooded water regime (PFOA) and riverine streambeds with temporarily flooded
(R4SBA) or seasonally flooded (R4SBJ) water regimes. These may or may not be present in
the BSA; the mapping needs to be field verified during a formal jurisdictional delineation.
Parcels containing streambeds, channels, or converging slopes may contain jurisdictional
features. Based on the field surveys, it is expected that the potential jurisdictional waters
shown on Figure 4.4-3 could be considered WOTUS, waters of the State, and/or CDFW
jurisdictional waters. Additionally, there may be some areas that are jurisdictional that were
not mapped by the National Wetlands Inventory (NWI) (Figure 4.4-3).
The limits of non-wetland WOTUS and waters of the State are identified by the presence of
an Ordinary High Water Mark. The determination of wetlands is based on the USACE’s
three-parameter approach in which wetlands are defined by the presence of hydrophytic
vegetation, hydric soils, and wetland hydrology indicators.
It is important to note that there have been multiple changes to the definition of WOTUS in
recent years resulting in substantial changes to areas under federal jurisdiction. Most
recently, the USEPA amended the definition of WOTUS to conform to the recent Supreme
Court decision in Sackettv.USEPA which took effect on September 8, 2023. The amended
definition excludes all waters that are not determined to be “relatively permanent” in their
flow regime (i.e., ephemeral waters).
The limits of RWQCB waters and wetlands include ephemeral and isolated waters along with
all other USACE waters. The limits of CDFW jurisdictional waters are identified as either the
top of bank or the outer drip line of riparian vegetation associated with the feature.
A formal delineation of the BSA has not been conducted; however, the field surveys observed
that the drainages in the BSA are generally ephemeral and vegetated with facultative upland
or upland vegetation. Under the current USACE definition, drainages in the BSA would likely
not be considered WOTUS because they are ephemeral. However, the drainages would likely
be under the jurisdiction of RWQCB and CDFW. A formal jurisdictional delineation would
need to be conducted to confirm this. Additionally, given the evolving definition of WOTUS,
the definition could change; therefore, a jurisdictional delineation would be needed to
confirm the jurisdiction of each agency prior to disturbance of any potentially jurisdictional
areas.
SensitivePlantSp
ecies Table 4.4-2 provides a summary of special status plant species reported to occur in the
Project region (i.e., the USGS’ Baldwin Park, San Dimas, Ontario, La Habra, Yorba Linda, Prado
Dam, Azusa, Glendora, and Mt. Baldy 7.5-minute quadrangles). This list includes species
reported by the CNDDB and the CNPS, supplemented with species from the Project
Biologists’ experience that either occur nearby or could occur based on the presence of
suitable habitat. The table includes information on the status, species habitat, and potential
for occurrence. Note that these species are listed alphabetically according to their scientific
name.
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San Dimas
!( MCTA
!( !(
!(
Legend !( !(
!(
Project
Boundary !(
!(
Conservation
Easement
Parcel !(!( !(
!( Wetland
Type !( !( Freshwater Forested/Shrub
Wetland
Freshwater Pond
!(
Rancho !( !( Riverine
Rp1FO PUBHx Riparian Type
Forested/Shrub
Riparian
Infrastructure
!(
PFOA Culvert PFOA
PFOA
!( !(
!( Catch
Basin Rp1FO
Ribbon
Drain
Open
Rp1FO Channel
I Underground Culvert
Gravity Underground
Culvert Rp1FO Note: Jurisdictional resources shown are based on remote data
and may not represent actual jurisdictional resources in the Project
Boundary. A jurisdictional delineation would be
required to map
resources under the regulatory authority of the U.S.
Army Corps of
Engineers, the Regional Water Quality Control Board,
and/or the
California Department of Fish and Wildlife.
PFOA
PFO/EM1A
h Key Map
!( §¨15 !( §¨
ANGELE Rp1SS 210 S §¨
NATIONA
L
F Project
Location
215 R4SBA ST2 Bernardin
o
!( §¨
ST
30 !( ST110 210 Rp1SS Rp1SS ST §¨
710 10
§¨
Los § Angeles ¨
10 605 R4SBA §¨
ST60 710 ST142
R4SBJ ST
Rp1SS
§¨
72 ST
71 Riverside 105
ST Orange ST91 19 §¨ ST91 5 ST57 ST90 R4SBJ ²
R4SBJ 0 175
50 350
Feet
!(
!(
Rp1SS Rp1SS 0 100
Meters Scale:
1:4,200 Rp1SS
!( Data Source: U.S. Fish & Wildlife Service; National Wetlands Inventory (2023);
UltraSystems
(2022)
!(
Aerial Source: Nearmap
2023
Potential Jurisdictional
Resources
Figure 4.4-3
!( R4SBA !( Rp1FO R4SBAx
(Rev: 01/05/2024 PLO)
R:\Projects\SAN04\3SAN040200\Graphics\Bio_NMD\ex_Potential_JD_Resources.pdf
UpdatedBiologicalResourc
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Of the 76 species reported from the Project region, one species (southern California black
walnut) was incidentally observed during the general surveys and 25 species have potential
or limited potential to occur in the BSA based on the presence of suitable habitat. The
remaining 51 species would not be expected to occur because the BSA lacks suitable habitat
or because it is outside the current known geographic or elevation range of the species.
Species observed in the BSA and federally or State-listed species with potential or limited
potential to occur are discussed further in Table 4.2-2, Special Status Plant Species Reported
from the Project Region, below.
Focused surveys have not been conducted for special status plant species in the BSA.
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TABLE4.4‐2
SPECIALSTATUSPLANTSPECIESREPORTEDFROM
THEPROJECTREGION
Federal
Status
State
Species CommonNam Status
e
CRPR
Habitat* PotentialtoOcc
Sandy areas in ur
chaparral,
coastal scrub, and
desert
dunes between 245
and
5,250 feet above
msl.
Not expected to occur;
no
suitable soils;
outside
current known
Abroniavillosavar.
aurita
chaparral sandverbena—
—
—
—
—
—
1B.1
geographic
Gravelly or sandy range.
soils in
chaparral and lower
montane coniferous
forest
between 4,005 and
8,530
feet above msl.
Not expected to occur;
no
suitable habitat;
outside
current known
geographic and
elevation
range.
Acanthoscyphusparis
hiivar.
parishii
Parish’s
oxytheca
4.2 4.3
Mojavean desert scrub and Not expected
to occur; no Sonoran desert scrub
between 65 and 5,580
feet
above msl.
suitable habitat;
outside Amaranthuswats
onii
Watson’s
amaranth current known
geographic
Chaparral, cismontane range.
woodland, coastal
scrub,
meadows and seeps,
pinyon
and juniper woodland,
and
valley and foothill
grassland
between 490 and 4,280
feet
above msl.
May occur;
suitable
habitat;
historically
reported from
Bonelli
Regional Park
(CCH
2023).
Androscceelongat
essp.
acuta
California
androsace
— — 4.2
Not expected to occur;
no
suitable habitat;
outside
current known
geographic and
elevation
range.
Granitic soil in
chaparral
and pinyon and
juniper
woodland between
3,380
and 6,560 feet above
msl.
Aphyllonvalidum
ssp.
validum
Rock Creek
broomrape
San Gabriel
manzanita
— —
—
1B.2
1B.2
Not expected to occur;
no
suitable habitat;
outside
current known
geographic and
elevation
range.
Rocky soil in
chaparral
between 1,950 and
4,920
feet above msl.
Arctostaphylosgland
ulosa
ssp.gabrielensis
—
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TABLE4.4‐2
SPECIALSTATUSPLANTSPECIESREPORTEDFROM
THEPROJECTREGION
Federal
Status
State
Species CommonNam Status
e
CRPR
Habitat* PotentialtoOcc
May occur; ur
suitable
habitat;
historically
reported from
Bonelli
Regional Park
(CCH
2023).
Rocky soil in
chaparral,
cismontane woodland,
and
coastal scrub between
590
and 3,280 feet above
msl.
Aspleniumvespert
inum
western
spleenwort
—
—
—
—
4.2 Carbonate (usually),
rocky,
or sandy soils in
lower
montane coniferous
forest
and upper montane
coniferous forest
between
5,580 and 9,005 feet
above
msl.
Not expected to occur;
no
suitable habitat;
outside
current known
Astragalusbicrist
atus
Astragalusbraunt
onii
crested milkvetch4.3
geographic and
elevationrange.
Recent burns or
disturbed
areas, usually on
sandstone
with carbonate layers
in
chaparral, coastal
scrub,
valley and foothill
grassland
between 15 and 2,100
feet
above msl.
Not expected to occur;
no
suitable soils.
Braunton’s milkvetchFE — 1B.1
Alkaline or clay soils
in
coastal bluff scrub,
coastal
dunes, coastal scrub,
and
valley and foothill
grassland
between 10 and 1,510
feet
above msl.
Limited potential to
occur; suitable
habitat; at
edge of current
known
geographic range.
Atriplexcoult
eri
Atriplexpari
shii
Coulter’s saltbush
Parish’s
brittlescale
—
—
—
—
1B.2
1B.1
Alkaline or clay soils in
chenopod scrub, playas, and Not expected
to occur; no
vernal pools between 80
suitable
and 6,235 feet above habitat.
msl.
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0005 PROJECT
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esSection
TABLE4.4‐2
SPECIALSTATUSPLANTSPECIESREPORTEDFROM
THEPROJECTREGION
Federal
Status
State
Species CommonNam Status
e
CRPR
Habitat* PotentialtoOcc
Gravelly or sandy soil ur
in
chaparral, cismontane
woodland, coastal
scrub,
and riparian scrub
between
230 and 2,705 feet
above
msl. Perennial,
evergreen
species observable
Limited potential
to
occur; suitable
habitat;
reported
approximately
eight miles to the
east
(CCH 2023).
Berberisnev
inii
Nevin’s
barberry
FE SE 1B.1
year-round.
Often clay soils in
chaparral
openings, cismontane
woodland, coastal
scrub,
playas, valley and
foothill
grassland, and vernal
pools
between 80 and 3,675
feet
above msl.
May occur; suitable
habitat; reported
approximately five
miles
to the north (CCH
2023).
Brodiaeafilif
olia
thread-leaved
brodiaea
Catalina mariposa
lily
FT
—
SE
—
1B.1
4.2 Chaparral,
cismontane
woodland, coastal
scrub,
and valley and
foothill
grassland between 50
and
2,295 feet above
msl.
May occur; suitable
habitat; historically
reported
approximately
two miles to the
north
(CCH 2023).
Calochortuscatali
nae
Clay, rocky, or
serpentinite
soil in chaparral,
cismontane
woodland,
coastal scrub, and
valley
and foothill grassland
between 100 and 4,265
feet
above msl.
Not expected to
occur;
outside current
known
geographic range.
Calochortusclavatu
svar.
clavatus
club-haired mariposa
lily
slender mariposa lily
—
—
—
—
4.3 Chaparral, coastal
scrub,
and valley and
foothill
grassland between
1,050
and 3,280 feet above
msl.
Not expected to
occur;
outside current
known
geographic and
elevation
range.
Calochortusclavatu
svar.
gracilis
1B.2
MUNICIPAL CODE TEXT AMENDMENT 20-
0005 PROJECT
4-32
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NEGATIVE DECLARATION
UpdatedBiologicalResourc
esSection
TABLE4.4‐2
SPECIALSTATUSPLANTSPECIESREPORTEDFROM
THEPROJECTREGION
Federal
Status
State
Species CommonNam Status
e
CRPR
Habitat* PotentialtoOcc
Rocky and sandy ur
sites,
usually of granitic or
alluvial material, in
coastal
scrub, chaparral, valley
and
foothill grassland,
cismontane
woodland,
lower montane
coniferous
forest between 330
and
5,580 feet above msl.
May occur; suitable
habitat; reported
approximately one
mile to
the southeast
(CDFW
2023a).
Calochortusplum
merae
Plummer’s mariposalily— — 4.2
Dry, rocky calcareous slopes
and rock outcrops in coastal
scrub, chaparral, valley and
foothill grassland between approximately
one mile to
345 and 2,805 feet above
msl.
May occur;
suitable
habitat; reported
Calochortusweedi
ivar.
intermedius
intermediate mariposalily
lucky morning-glory
—
—
—
—
—
—
1B.2
1B.1
1A
the southeast (CCH
2023).
Alkaline or loamy
soils in
meadows and seeps
and
alluvial riparian
scrub
between 100 and 705
feet
above msl.
Not expected to occur;
no
suitable habitat.
Calystegiafe
lix
Coastal marshes
and
swamps at 15 feet
above
msl.
Not expected to
occur;
considered extirpated,
no
suitable habitat;
outside
current known
Calystegiasepium
ssp.
binghamiae
Santa Barbara
morningglory geographic and
elevation
Sand or clay soil in range.
coastal
bluff scrub,
cismontane
woodland, coastal
dunes,
coastal scrub, and
valley
and foothill grassland
between sea level and
985
feet above msl.
May occur; suitable
habitat; reported
approximately 14
miles to
the west (CCH
2023).
Camissoniopsisle
wisii
Lewis’ eveningprimrose— — 3
MUNICIPAL CODE TEXT AMENDMENT 20-
0005 PROJECT
4-33
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NEGATIVE DECLARATION
UpdatedBiologicalResourc
esSection
TABLE4.4‐2
SPECIALSTATUSPLANTSPECIESREPORTEDFROM
THEPROJECTREGION
Federal
Status
State
Species CommonNam Status
e
CRPR
Habitat* PotentialtoOcc
Granitic soil in ur
chaparral,
lower montane
coniferous
forest, and pinyon
and
juniper woodland
between
3,805 and 7,120 feet
above
msl.
Not expected to occur;
no
suitable habitat;
outside
current known
geographic and
elevation
range.
Castillejagleas
oni
Mt. Gleason
paintbrush
—
—
SR
—
1B.2
Disturbed sites and
alkaline
soils in marshes and
swamp
margins, vernally
mesic
valley and foothill
grassland, and vernal
pools
between sea level and
1,575
feet above msl.
Centromadiaparryi
ssp.
australis
Not expected to occur;
no
suitable habitat.
southern
tarplant
1B.1
Alkaline (generally)
soils in
chenopod scrub,
meadows
and seeps, playas,
riparian
woodland, and valley
and
foothill grassland
between
sea level and 1,200
feet
above msl.
Limited potential to
occur; suitable
habitat; at
edge of current
known
geographic range.
Centromadiapungen
sssp.
laevis
smooth
tarplant
—
—
—
—
—
—
1B.1
4.2 Granitic soil in
chaparral,
coastal scrub, and
lower
montane coniferous
forest
between 985 and 6,235
feet
above msl.
Not expected to
occur;
outside current
known
geographic range.
Chorizantheleptot
heca
Peninsular
spineflower
Parry’s spineflower
Sometimes rocky or
sandy
soils in openings of
chaparral, cismontane
woodland, coastal
scrub,
and valley and
foothill
grassland between 900
and
4,005 feet above msl.
May occur; suitable
habitat; historically
reported
approximately
four miles to the
north
(CCH 2023).
Chorizantheparryi
var.
parryi
1B.1
MUNICIPAL CODE TEXT AMENDMENT 20-
0005 PROJECT
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NEGATIVE DECLARATION
UpdatedBiologicalResourc
esSection
TABLE4.4‐2
SPECIALSTATUSPLANTSPECIESREPORTEDFROM
THEPROJECTREGION
Federal
Status
State
Species CommonNam Status
e
CRPR
Habitat* PotentialtoOcc
Alkaline freshwater ur
marshes and swamps
and
meadows and seeps
between 195 and 5,250
feet
above msl.
Not expected to occur;
no
suitable habitat.
Cladiumcaliforni
cum
California sawgrass—
—
—
—
2B.2
Clay, seeps,
occasionally
serpentine soils in
chaparral openings,
coastal
scrub, valley and
foothill
grasslands between
100
and 2,430 feet above
msl.
May occur; suitable
habitat; historically
reported
approximately
seven miles to the
east
(CCH 2023).
smallflowered
morning-glory
Convolvulussim
ulans
4.2 4.2
Usually vernally
mesic,
sometimes sandy
substrate
in coastal scrub, valley
and
foothill grassland,
and
vernal pools between
80 and 3,085 feet above
msl.
May occur;
suitable
habitat; reported
approximately
seven
miles to the east
(CCH
2023).
Deinandrapanicul
ata
Dodecahemalepto
ceras
paniculate
tarplant
— —
Sandy soil in
chaparral,
cismontane woodland,
and
alluvial fan coastal
scrub
between 655 and 2,495
feet
above msl.
Not expected to occur;
no
suitable soils.
slender-horned
spineflower
San Gabriel River
dudleya
FE
—
SE
—
1B.1
1B.2
Granitic soil in
chaparral
between 900 and 1,500
feet
above msl.
Dudleya4‐35cymos
assp.
crebrifolia
Not expected to occur;
no
suitable habitat.
Granitic soil in
chaparral,
cismontane
woodland,
coastal scrub, lower
montane coniferous
forest,
and riparian
woodland
between 800 and 2,000
feet
above msl.
Not expected to
occur;
outside current
known
geographic range.
San Gabriel
Mountains
dudleya
Dudleyadensifl
ora
— — 1B.1
MUNICIPAL CODE TEXT AMENDMENT 20-
0005 PROJECT
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NEGATIVE DECLARATION
UpdatedBiologicalResourc
esSection
TABLE4.4‐2
SPECIALSTATUSPLANTSPECIESREPORTEDFROM
THEPROJECTREGION
Federal
Status
State
Species CommonNam Status
e
CRPR
Habitat* PotentialtoOcc
Heavy, often clayey ur
soils or
grassy slopes in
chaparral,
coastal scrub, valley
and
foothill grassland
between
50 and 2,590 feet
above
msl.
May occur;
suitable
habitat; reported
from
Bonelli Regional
Park
(CCH 2023).
Dudleyamultica
ulis
many-stemmed
dudleya
— —
SE
1B.2
Sandy or gravelly soils on
river floodplains or terraced suitable
habitat; outside
fluvial deposits in coastal
scrub and chaparral
between 300 and 2,000 feet
above msl.
Not expected to occur;
no
Eriastrumdensifoliu
mssp.
sanctorum
current known
geographic range (i.e.,
the
Santa Ana River
Santa Ana River
woollystar
hot springs fimbristylis
FE 1B.1
watershed).
Alkaline soils near
hot
springs, meadows,
and
seeps between 360
and
4,395 feet above
msl.
Not expected to occur;
no
suitable habitat.
Fimbristylisther
malis
—
—
—
—
2B.2
4.3 Granitic, rocky, or sandy soil Not expected
to occur; no in chaparral and
lower
montane coniferous
forest
between 3,935 and
8,695
feet above msl.
suitable habitat;
outside
current known
geographic and
elevation
range.
Galiumangustifoliu
mssp.
gabrielense
San Antonio
Canyon
bedstraw
Broad-leafed upland
forest,
chaparral, cismontane
woodland, and lower
montane coniferous
forest
between 1,395 and
4,920
feet above msl.
Not expected to occur;
no
suitable habitat;
outside
current known
geographic and
elevation
range.
Galiumgran
de
San Gabriel
bedstraw
— — 1B.2
MUNICIPAL CODE TEXT AMENDMENT 20-
0005 PROJECT
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NEGATIVE DECLARATION
UpdatedBiologicalResourc
esSection
TABLE4.4‐2
SPECIALSTATUSPLANTSPECIESREPORTEDFROM
THEPROJECTREGION
Federal
Status
State
Species CommonNam Status
e
CRPR
Habitat* PotentialtoOcc
Granitic, gravelly, or ur
rocky
soil in lower montane
coniferous forest and
upper
montane coniferous
forest
between 5,055 and
8,205
feet above msl.
Not expected to occur;
no
suitable habitat;
outside
current known
geographic and
elevation
range.
Galiumjepso
nii
Jepson’s
bedstraw
— — 4.3
Rocky soil in
cismontane
woodland, lower
montane
coniferous forest,
montane
riparian forest, and
upper
montane coniferous
forest
between 3,790 and
8,695
feet above msl.
Not expected to
occur;
outside current
known
geographic and
elevation
range.
Heucheracaespi
tosa
urn-flowered
alumroot
mesa horkelia
—
—
—
—
—
—
4.3 Sandy or gravelly soils
in
maritime chaparral,
cismontane woodland,
and
coastal scrub between
230
and 2,660 feet above
msl.
May occur; suitable
habitat; historically
reported
approximately
four miles to the
east
(CCH 2023).
Horkeliacuneata
var.
puberula
1B.1
2B.1
Mesic areas of
chaparral,
coastal scrub, often
alkali
meadows and seeps,
Mojavean desert scrub,
and
riparian scrub between
sea
level and 3,985 feet
above
msl.
Not expected to occur;
no
suitable habitat.
Imperatabrevif
olia
Juglanscaliforni
ca
California
satintail
Chaparral, cismontane
woodland, coastal
scrub,
and riparian
woodland
between 165 and 2,955
feet
above msl. Perennial
species observable
Southern California
black
walnut
Observeddurin
g
generalsurveys.
— — 4.2
year-round.
MUNICIPAL CODE TEXT AMENDMENT 20-
0005 PROJECT
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NEGATIVE DECLARATION
UpdatedBiologicalResourc
esSection
TABLE4.4‐2
SPECIALSTATUSPLANTSPECIESREPORTEDFROM
THEPROJECTREGION
Federal
Status
State
Species CommonNam Status
e
CRPR
Habitat* PotentialtoOcc
Moist, saline places ur
including coastal
dunes,
coastal scrub, coastal
salt
marshes and swamps,
and
Not expected to
occur;
perennial species
not
Juncusacutusssp.l
eopoldii
southwestern spiny
rush
— — 4.2 alkaline meadows and seeps observed
during general between 10 and 2,955
feet
above msl. Perennial
species observable
yearround.
surveys; no
suitable habitat.
Usually on alkaline
soils in
coastal salt marsh,
playas,
and vernal pools
between 5
and 4,005 feet above
msl.
Lastheniaglabrata
ssp.
coulteri
Not expected to occur;
no
suitable habitat.
Coulter’s
goldfields
pride-of-California
fragrant pitcher
sage
—
—
—
—
—
—
1B.1
4.3 Chaparral between 655 and Not expected
to occur; no
5,005 feet above msl. suitable
habitat.
Chaparral between 65 and Not expected to
occur; no
Lathyrussplend
ens
Lepechiniafragr
ans
4,300 feet above
msl.
suitable habitat;
outside 4.2 current
geographic known
Dry soils in chaparral range.
and
coastal scrub between 5
and
2,905 feet above msl.
May occur; suitable
habitat; historically
reported
approximately
five miles to the east
(CCH
2023).
Lepidiumvirginicu
mvar.
robinsonii
Robinson’s peppergrass
ocellated Humboldt
lily
— —
—
4.3 4.2
Openings in
chaparral,
cismontane
woodland,
coastal scrub,
lower
Not expected to
occur;
outside current
known
range.
Liliumhumboldtii
ssp.
ocellatum
— montane coniferous
forest,
and riparian
woodland
between 100 and 5,905
feet
above msl.
MUNICIPAL CODE TEXT AMENDMENT 20-
0005 PROJECT
4-38
RECIRCULATED DRAFT INITIAL STUDY/MITIGATED
NEGATIVE DECLARATION
UpdatedBiologicalResourc
esSection
TABLE4.4‐2
SPECIALSTATUSPLANTSPECIESREPORTEDFROM
THEPROJECTREGION
Federal
Status
State
Species CommonNam Status
e
CRPR
Habitat* PotentialtoOcc
Mesic areas in lower ur
montane coniferous forest, Not expected to
occur; no meadows and seeps,
riparian forest, and
upper
suitable habitat;
outside
current known
Liliumpar
ryi
lemon lily — — 1B.2
montane coniferous forests geographic and
elevation between 4,005 and
9,005
range.
feet above
Rocky openings in msl.
chaparral, lower
montane
coniferous forest, and
upper
montane coniferous
forest
between 4,985 and
9,185
feet above msl.
Not expected to occur;
no
suitable habitat;
outside
current known
Linanthusconci
nnus
San Gabriel
linanthus
—
—
—
—
1B.2
4.2 geographic and
elevationrange.
Clay soil in
cismontane
woodland, coastal
scrub,
valley and foothill
grassland, and vernal
pools
between 50 and 3,510
feet
above msl.
May occur; suitable
habitat; reported
approximately three
miles
to the southeast
(CCH
2023).
Microserisdouglasi
issp.
platycarpha
small-flowered
microseris
Alluvial terraces,
scree,
slopes, talus, and
washes in
chaparral and lower
montane coniferous
forest
between 4,430 and
5,740
feet above msl.
Not expected to occur;
no
suitable habitat;
outside
current known
geographic and
elevation
range.
Monardellaaustrali
sssp.
jokerstii
Jokerst’s
monardella
—
—
—
—
1B.1
1B.2
Dry openings in chaparral
and lower montane
coniferous forest between
4,265 and 4,920 feet above geographic and
elevation
msl. range.
Not expected to occur;
no
suitable habitat;
outside
current known
Monardellabrewer
issp.
glandulifera
Brown’s Flat
monardella
MUNICIPAL CODE TEXT AMENDMENT 20-0005
PROJECT
RECIRCULATED DRAFT INITIAL STUDY/MITIGATED
NEGATIVE DECLARATION
4-39
UpdatedBiologicalResourc
esSection
TABLE4.4‐2
SPECIALSTATUSPLANTSPECIESREPORTEDFROM
THEPROJECTREGION
Federal
Status
State
Species CommonNam Status
e
CRPR
Habitat* PotentialtoOcc
Broad-leafed upland ur
forest,
chaparral, cismontane
woodland, lower
montane
coniferous forest, valley
and
foothill grassland
between
2,395 and 7,200 feet
above
msl.
Not expected to
occur;
outside current
known
geographic and
elevation
range.
Monardellamacranth
assp.
hallii
Hall’s
monardella
— — 1B.3
Rocky, usually
serpentinite
soil in chaparral,
closedcone coniferous forest,
and
lower montane
coniferous
forest between 1,640
and
5,905 feet above
msl.
Not expected to occur;
no
suitable habitat;
outside
current known
Monardellasaxi
cola
Monardellaviri
dis
rock monardella
green
monardella
—
—
—
—
4.2 4.3
geographic and
elevationrange.
Broad-leafed upland
forest,
chaparral, and
cismontane
woodland between 330
and
3,315 feet above msl.
Not expected to
occur;
outside current
known
Mesic seeps and geographic range.
streambanks in
chaparral,
coastal scrub, lower
montane coniferous
forest,
and meadows and
seeps
between 330 and 6,560
feet
above msl.
Not expected to occur;
no
suitable habitat;
outside
current known
Muhlenbergiacalifo
rnica
California
muhly
— — 4.3
geographic
range.
MUNICIPAL CODE TEXT AMENDMENT 20-0005
PROJECT
RECIRCULATED DRAFT INITIAL STUDY/MITIGATED
NEGATIVE DECLARATION
4-40
UpdatedBiologicalResourc
esSection
TABLE4.4‐2
SPECIALSTATUSPLANTSPECIESREPORTEDFROM
THEPROJECTREGION
Federal
Status
State
Species CommonNam Status
e
CRPR
Habitat* PotentialtoOcc
Alkaline or ur
serpentinite
cismontane woodland, soils in chaparral,
coastal scrub, marshes
and
swamps, and meadows
and
seeps between 80 and
7,630
feet above msl.
Not expected to occur;
no
suitable soils.
Muhlenbergiau
tilis
aparejo
grass
—
—
—
—
—
—
2B.2
Mesic areas of coastal
scrub,
meadows and seeps,
alkaline valley and
foothill
grassland, and vernal
pools
between 10 and 3,970
feet
above msl.
prostrate vernal
pool
navarretia
Not expected to occur;
no
suitable habitat.
Navarretiaprost
rata
Oreonanavestita
1B.2
Gravelly or talus substrate
in lower montane
coniferous forest, subalpine suitable
habitat; outside
coniferous forest, and upper
montane coniferous forest
between 5,300 and 11,485
feet above msl.
Not expected to occur;
no
woolly mountainparsley1B.3 current known
geographic and
elevation
range.
Meadows and
seeps
Not expected to occur;
Pelazoneuronpuber no
ulum
var.sonorense
between 165 and 2,000 feet suitable
habitat; outside Sonoran maiden
fern
—
—
—
—
2B.2
4.2 above
msl.
current
geographic known
Open gravelly, talus, range.
or
rocky slopes of
chaparral,
coastal scrub, and
valley
and foothill grassland
between sea level and
3,280
feet above msl.
May occur; suitable
habitat; historically
reported less than
one
half mile to the
southeast
(CCH 2023)
Phaceliahub
byi
Hubby’s
phacelia
MUNICIPAL CODE TEXT AMENDMENT 20-
0005 PROJECT
4-41
RECIRCULATED DRAFT INITIAL STUDY/MITIGATED
NEGATIVE DECLARATION
UpdatedBiologicalResourc
esSection
TABLE4.4‐2
SPECIALSTATUSPLANTSPECIESREPORTEDFROM
THEPROJECTREGION
Federal
Status
State
Species CommonNam Status
e
CRPR
Habitat* PotentialtoOcc
Rocky or sandy soil ur
in
chaparral, coastal
dunes,
coastal scrub, and
coastal
salt marshes and
swamps
between 15 and 985
feet
above msl.
May occur; suitable
habitat; reported
approximately eight
miles
to the northeast
(CCH
2023).
Phaceliaramosissim
avar.
austrolitoralis
south coast
branching
phacelia
—
—
—
—
—
—
—
—
3.2 Coastal dunes and
coastal
scrub between 5 and
1,310
feet above msl.
May occur; suitable
habitat; historically
reported
approximately
nine miles to the
west
(CCH 2023).
Phaceliastella
ris
Brand’s star
phacelia
white rabbittobacco
San Gabriel oak
1B.1
2B.2
4.2 Sandy or gravelly areas
of
riparian woodland,
cismontane woodland,
coastal scrub, and
chaparral
between sea level and
6,890
feet above msl.
May occur; suitable
habitat; historically
reported
approximately
six miles to the
northeast
(CCH 2023).
Pseudognaphali
um
leucocephalum
Chaparral and
cismontane
woodland between
1,475
and 3,280 feet above
msl.
Perennial species
Not expected to occur;
no
suitable habitat;
outside
current known
elevation
range.
Quercusdurata
var.
gabrielensis observable yearround. Chaparral,
cismontane
woodland, riparian
woodland, valley and
foothill grassland
between
165 and 4,265 feet
above
msl. Perennial
species
observable yearround.
Limited potential
to
occur; suitable
habitat;
nearest recent
record is
from Bonelli
Regional
Park to the east
(CCH
2023)..
Quercusengelma
nnii
Engelmann
oak
— — 4.2
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TABLE4.4‐2
SPECIALSTATUSPLANTSPECIESREPORTEDFROM
THEPROJECTREGION
Federal
Status
State
Species CommonNam Status
e
CRPR
Habitat* PotentialtoOcc
Chaparral and coastal ur
scrub,
often in burns, between
65 and 3,935 feet above
msl.
Perennial species
Limited potential to
occur; suitable
habitat;
nearest recent record
is
approximately 7.5
miles
northeast in Ontario
(CCH
2023).
Romneyacoul
teri
Coulter’s matilija
poppy
— — 4.2
observable yearround.
Shallow freshwater
marshes and swamps
between sea level and
2,135
feet above msl.
Not expected to occur;
no
suitable habitat.
Sagittariasanfo
rdii
Senecioaphana
ctis
Sanford’s
arrowhead
chaparral ragwort
—
—
—
—
1B.2
2B.2
Drying alkaline flats
of
chaparral,
cismontane
woodland, coastal
scrub
between 50 and 2,625
feet
above msl.
Not expected to occur;
no
suitable soils.
Rocky slopes in
chaparral
and coastal bluff
scrub
between 1,310 and
4,920
feet above msl.
Not expected to occur;
no
suitable habitat;
outside
current known
Senecioastepha
nus
San Gabriel
ragwort
—
—
—
—
4.3 geographic and
elevationrange.
Alkali springs and
marshes
in playas, chaparral,
coastal
scrub, lower montane
coniferous forest, and
Mojavean desert
scrub
between 50 and 5,020
feet
above msl.
Not expected to occur;
no
suitable habitat.
Sidalceaneomexi
cana
salt spring
checkerbloom
2B.2
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TABLE4.4‐2
SPECIALSTATUSPLANTSPECIESREPORTEDFROM
THEPROJECTREGION
Federal
Status
State
Species CommonNam Status
e
CRPR
Habitat* PotentialtoOcc
Sandy soils in lower ur
montane coniferous
forest
between 3,655 and
8,530
feet above msl.
Not expected to occur;
no
suitable habitat;
outside
current known
Sidothecacaryophyll
oides
chickweed
oxytheca
—
—
— 4.3
geographic and
elevationrange.
Disturbed areas,
vernally
mesic grassland, or
near
ditches, streams, and
springs in meadows
and
seeps, cismontane
woodland, coastal
scrub,
lower montane
coniferous
forest, marshes and
May occur; suitable
habitat; reported
approximately 4.5
miles
Symphyotrichumdefoliatum San
Bernardino aster
— 1B.2
to the east (CCH
2023). swamps, valley and
foothill
grassland between 5
and
6,695 feet above msl. Mesic areas of broadleafed
upland forest,
chaparral,
cismontane
woodland,
lower montane
coniferous
forest, and riparian
woodland between 985
and
6,595 feet above msl.
Not expected to occur;
no
suitable habitat;
outside
current known
Symphyotrichumgr
eatae
Greata’s
aster
— — 1B.3
geographic
range.
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TABLE4.4‐2
SPECIALSTATUSPLANTSPECIESREPORTEDFROM
THEPROJECTREGION
Federal
Status
State
Species CommonNam Status
e
CRPR
Habitat* PotentialtoOcc
Dry, rocky slopes of pinyon Not expected ur
to occur; no and juniper
woodland
between 1,970 and
7,220
feet above msl.
suitable habitat;
outside
current known
geographic and
elevation
Thysanocarpusrig
idus
rigid
fringepod
— — 1B.2
range.
CRPR: California Rare Plant Rank; msl: mean
sea level. LEGEND:
Federal(USFWS
)
State(CDFW
)
FE
FT
Endangered
Threatened
SE
SR
Endangered
Rare
CRPR
1A
1B
2B
3 Plants presumed extirpated in California and either rare or extinct elsewhere
Plants Rare, Threatened, or Endangered in California and elsewhere
Plants Rare, Threatened, or Endangered in California but more common elsewhere
Plants about which we need more information – A Review List Plants of limited distribution – A Watch List
4 CRPRThreatCodeExte
nsions None
.1
.2
Plants lacking any threat
information Seriously threatened in California (over 80% of occurrences threatened; high degree and immediacy of threat)
Fairly threatened in California (20–80% of occurrences threatened; moderate degree and immediacy of threat)
Not very threatened in California (<20% of occurrences threatened; low degree and immediacy of threat or no current threats known)
.3
Species that were observed on site are shown in
boldfacetype. * Sources include CDFW 2023a, CNPS 2023a, and Jepson Flora Project 2023.
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Thread-leaved
Brodiaea
Thread-leaved brodiaea (Brodiaeafilifolia) is a federally Threatened species, a State
Endangered species, and a CRPR 1B.1 species. It typically blooms between March and June
(CNPS 2023a). This perennial bulbiferous herb often occurs in clay soil in chaparral
openings, cismontane woodland, coastal scrub, playas, valley and foothill grassland, and
vernal pools between 80 and 3,675 feet above msl (CNPS 2023a). This species is known from
the south coast (Los Angeles and San Diego Counties), the San Bernardino mountains, and
the western Peninsular Ranges (Orange, Riverside, and San Diego Counties) (Jepson Flora
Project 2023). It is threatened by residential development, agriculture, foot traffic, grazing,
illegal dumping, non-native plants, and vehicles (CNPS 2023). This species has been reported
approximately five miles to the north (CCH 2023).
The general surveys were not timed to identify thread-leaved brodiaea in the BSA. The 2023
surveys were performed in July (after mowing was performed) and the earliest 2022 survey
was performed on June 30, 2022, which is at the end of the blooming period. Focused surveys
would be needed to determine the presence or absence of this species in the BSA. Threadleaved brodiaea has potential to occur in coastal sage scrub and limited potential to occur in
non-native herbaceous vegetation in the BSA.
Nevin’s
Barberry
Nevin’s barberry (Berberisnevinii) is a federally and State Endangered species and a CRPR
1B.1 species. It is a perennial shrub that is observable year-round. This species occurs in
gravelly or sandy soils in chaparral, coastal sage scrub, cismontane woodland, and riparian
woodland from 230 to 2,705 feet above msl (CNPS 2023a). This species is known from Los
Angeles, Riverside, San Bernardino, and San Diego Counties. It is threatened by alteration of
fire regimes, development, and road maintenance (CNPS 2023a). This species has been
reported approximately eight miles to the east (CCH 2023).
While this species would have been observable during the general surveys, much of the
general surveys were conducted from overlooks; surveys did not visually cover 100 percent
of the BSA. Focused surveys would be needed to determine the presence or absence of this
species in the BSA. Nevin’s barberry has potential to occur in coastal sage scrub, chaparral
and native woodlands and has a limited potential to occur in non-native woodlands in the
BSA.
Southern California Black
Walnut
Southern California black walnut is a CRPR 1B.1 species. It is a perennial tree that is
observable year-round. It typically blooms between March and August (CNPS 2023a). This
species occurs on hillsides and in canyons, chaparral, cismontane woodland, coastal scrub,
and riparian woodland between 165 and 2,955 feet above msl (Jepson Flora Project 2023;
CNPS 2023a). This species is known from the outer South Coast Ranges, the South Coast, the
western Transverse Ranges, the San Gabriel Mountains, the Peninsular Ranges, and the San
Jacinto Mountains (Jepson Flora Project 2023). Walnut forests are a fragmented, rare, and
declining vegetation community threatened by urbanization, grazing, non-native plants,
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possibly by lack of natural reproduction and hybridization with horticultural varieties of
walnut (CNPS 2023a).
Southern California black walnut trees were observed throughout the BSA. They are
primarily located in areas mapped as California walnut groves and California walnut groves
(disturbed) (Figure 4.4-2). A formal tree survey to inventory individual trees was not
performed.
Protected
Trees
Multiple trees within the BSA would meet the definition of a “mature significant tree”
pursuant to the City of San Dimas Municipal Code (Chapter 18.162 – Tree Preservation). This
would include coast live oak, southern California black walnut, and any other tree meeting
the trunk diameter requirement (including non-native species). A mature significant tree is
defined as any tree within the oak genus which measures 8 inches or more in trunk diameter
and/or any other species of trees which measure 10 inches or more in trunk diameter and/or
a multi-trunk tree(s) having a total circumference of 38 inches or more; the multi-trunk tree
shall include at least one trunk with a diameter of a minimum of 4 inches.
The following trees are
excluded:
trees planted, grown, and/or held for sale by licensed nurseries and/or tree farms or
the removal or transplanting of such trees pursuant to the operation of licensed
nursery and/or tree farm; trees within existing or proposed public right-of-way where their removal or
relocation is necessary to obtain adequate line-of-sight distances as required by the
City Engineer;
trees which, in the opinion of the City Engineer, will cause damage to existing public
improvements; trees which require maintenance or removal action for the protection of existing
electrical power or communication lines or other property of a public utility; trees damaged by thunderstorms, windstorms, flood, earthquakes, fire, widespread
organic disease or insect infestation, or other natural disasters and determined to be
dangerous by a police officer, fireman, civil defense official, or code enforcement
officer in their official capacity;
minor trimming and/or pruning of trees on developed property within the scope of
typical and reasonable tree maintenance; trees declared to be dead, diseased or dying, subject to the requirements of Section
18.162.090; fruit trees, including citrus, plum, nectarine, cherry, apricot, peach, pear, pomegranate,
persimmon, loquat, fig, avocado, and other species determined similar by the director of
development services.
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SensitiveWildlifeS
pecies Table 4.4-3 provides a summary of special status wildlife species reported to occur in the
Project region (i.e., the USGS’ Baldwin Park, San Dimas, Ontario, La Habra, Yorba Linda, Prado
Dam, Azusa, Glendora, and Mt. Baldy 7.5-minute quadrangles). This list includes species
reported by the CNDDB, supplemented with species from the Project Biologists’ experience
that either occur nearby or could occur based on the presence of suitable habitat. The table
includes information on the status, species habitat, and potential for occurrence. Note that
these species are listed taxonomically.
Of the 54 species reported from the Project region, two species (monarch butterfly [Danaus
plexippus] and Cooper’s hawk [Accipiter cooperii]) were incidentally observed during the
summer 2022 general surveys and 23 species have potential or limited potential to occur in
the BSA based on the presence of suitable habitat. The remaining species would not be
expected to occur because the BSA lacks suitable habitat or because it is outside the current
known geographic range of the species. Species observed in the BSA and federally or Statelisted species, Candidate species, or Fully Protected species with potential or limited
potential to occur are discussed further in Table 4.3-3, Special Status Wildlife Species
Reported From The Project Region, below.
Focused surveys have not been conducted for special status wildlife species in the BSA.
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TABLE4.4
SPECIALSTATUSWILDLIFESPECIESREPORTEDFRO ‐3
MTHEPROJECTREGION
State
Species
Invertebrates
CommonNam
e
FederalStatus
Status Habitata PotentialtoOc
cur
Overwintering sites consist of
forested
areas that provide protection
from the
elements and moderate
temperatures,
as well as nectar and clean
water
sources located nearby.
Observed(foraging
)
(Ultrasystems
2022).
Not expected for
Overwintering sites are within
1.5 miles of the Pacific Ocean at
elevations
of 200–300 feet above msl.
overwintering because
BSA
is too far inland and
is
outside the known
Candidate
(overwintering) Danausplexip
pus
monarch
butterfly
—
Reproduction is dependent on
the
presence of milkweed
(Asclepias sp.).
Primarily occurs in coastal,
lowland,
and foothill areas with
milkweed,
though also in deserts and
mountains.
elevational range
foroverwintering.
Inhabits areas with appropriate
food
sources (e.g.,
Antirrhinum,Phacelia,
Clarkia,Dendromecon,Esc
hscholzia,
andEriogonum[CDFW2
023a]).
May occur; suitable
habitat. Bombuscrot
chii
Fish
Crotch bumble
bee
— CE
Not expected to occur;
no
suitable habitat.
Oncorhynchusm
ykiss
irideuspop. 10
steelhead
California
DPS
– southern Inhabits streams; can tolerate
warmer
water and more variable
conditions.
FE
—
CE
Inhabits warm, fluctuating
streams
with slow-moving or
backwater
sections of warm to cool
streams;
substrates of sand or
mud.
Not expected to occur;
no
suitable habitat.
Gilaorcut
tii
arroyo
chub
SSC
Inhabits permanent streams
with cool,
flowing, rocky-bottomed
washes,
shallow cobble, and gravel
riffles.
Not expected to occur;
no
suitable habitat.
Rhinichthysosculusssp. 8 Santa Ana
speckled dace
— SSC
—
Inhabits coastal streams;
prefer
sand-rubble-boulder bottoms;
cool,
clear water; and algae.
Not expected to occur;
no
suitable habitat.
Catostomussanta
anae
Santa Ana
sucker
FT
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TABLE4.4
SPECIALSTATUSWILDLIFESPECIESREPORTEDFRO ‐3
MTHEPROJECTREGION
State
Species
Amphibians
CommonNam
e
FederalStatus
Status Habitata PotentialtoOc
cur
Breeds in ponds, reservoirs,
and
slow-moving streams and
lives in
terrestrial habitats.
Not expected to occur;
no
suitable habitat.
Tarichatoro
sa
Coast Range
newt
—
—
SSC
WL
Not expected to occur;
no
suitable habitat.
Ensatinaeschsch
oltzii
klauberi
Inhabits moist and shaded
evergreen
and deciduous woodlands.
large-blotched
ensatina
Limited potential to
occur
for foraging;
marginally
suitable terrestrial
habitat;
no suitable breeding
habitat.
Breeds in vernal pools in
grassland
habitats, but also
hardwood
woodlands.
Speahammo
ndii
western
spadefoot
arroyo toad
— SSC
SSC
Inhabits semi-arid areas near
washes,
sandy riverbanks, riparian
areas, palm
oasis, Joshua tree, mixed
chaparral
and sagebrush; stream
channels for
breeding (typically 3rd
order);
Not expected to occur;
no
suitable habitat.
Anaxyruscaliforn
icus
FE
adjacent stream terraces and
uplands for foraging and
wintering. Inhabits partly shaded
shallow
streams and riffles with a
rocky
substrate in a variety of
habitats.
Needs at least some cobblesized
substrate for egg-laying.
Not expected to occur;
no
suitable habitat.
foothill yellowlegged
frog – south coast
DPS
Ranaboy
lii
FE
FE
SE
Inhabits lakes, ponds,
meadow
streams, isolated pools and
open
riverbanks; rocky canyons in
narrow
canyons and in chaparral.
Not expected to occur;
no
suitable habitat.
southern
mountain
yellow-legged
frog
Ranamusco
sa
SE, WL
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TABLE4.4
SPECIALSTATUSWILDLIFESPECIESREPORTEDFRO ‐3
MTHEPROJECTREGION
State
Species
Reptiles
CommonNam
e
FederalStatus
Status Habitata PotentialtoOc
cur
Inhabits marshes, rivers,
streams, and
irrigation ditches, usually with
aquatic
vegetation and basking sites
and
suitable upland habitat.
Not expected to occur;
no
suitable habitat.
Emysmarmor
ata
western pond
turtle
FPT SSC
Inhabits a wide variety of
habitats
with open areas for sunning,
bushes
for cover, and patches of loose
soil for
burrowing.
May occur; suitable
habitat. Phrynosomablain
villii
Aspidoscelishyper
ythra
coast horned
lizard
— SSC
Inhabits coastal scrub,
orange-throated chaparral, and
whiptail
hardwood woodlands; prefers washes May occur;
suitable habitat.
and other sandy areas with patches of
brush and rocks.
—
—
WL
SSC
Inhabits deserts and semi-arid
areas
with sparse vegetation and
open
areas, woodland, and riparian
areas.
Aspidosceli
s
stejnegeri
tigris
May occur; suitable
habitat. coastal
whiptail
Inhabits sparsely vegetated areas of
beach dunes, chaparral, pine-oak
woodlands, desert scrub, sandy
washes, and stream terraces with
sycamores, cottonwoods, or oaks.
Sometimes found in suburban gardens May occur;
suitable habitat.
in Southern California. Spends most of
its life beneath the soil, under rocks,
boards, driftwood, logs, debris, or in
leaf litter. Prefers areas with loose,
sandy soil, moisture, warmth, and
plant cover.
southern
legless
lizard
California Anniellastebb
insi
—
—
SSC
SSC
Inhabits a range of scrub
and
grassland habitats, often with
loose or
sandy soils.
Arizona
elegans
May occur; suitable
habitat. California glossy
snake occidentali
s
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TABLE4.4
SPECIALSTATUSWILDLIFESPECIESREPORTEDFRO ‐3
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State
Species
Salvadora
hexalepis
CommonNam
e
FederalStatus
Status Habitata PotentialtoOc
cur Inhabits brushy or shrubby
vegetation
with small mammal burrows
for
refuge and overwintering
sites.
May occur; suitable
habitat. coast patch-nosed
snake
— SSC virgultea
Found in or near permanent
fresh
water, often along streams with
rocky
beds and riparian growth.
Not expected to occur;
no
suitable habitat.
two-striped
snake
garter Thamnophishamm
ondii
—
—
SSC
SSC
Inhabits rocky areas with
dense
vegetation in chaparral,
woodland,
grassland, and deserts.
red-diamond
rattlesnake
May occur; suitable
habitat. Crotalusru
ber
Birds Observed(foraging)
(Ultrasystems
2022);
expected to occur
for
nesting; suitable
foraging
and nesting
habitat.
Forages in woodland. Nests in
riparian
growths of deciduous trees,
such as
canyon bottoms on river
floodplains
and/or in live oaks.
WL
(nesting) Accipitercoop
erii
Aquilachrysae
tos
Cooper’s
hawk
golden eagle
—
—
Limited potential to
occur
for foraging; not
expected to
occur for nesting;
suitable
foraging habitat; no
suitable
habitat.
Found in a variety of open
habitats
(desert, grassland,
shrubland,
agriculture, streams)
especially near
mountains, hills, and cliffs.
WL, FP
(nesting
&
wintering)
Limited potential to
occur
for foraging; not
expected to
occur for nesting;
marginally
suitable foraging
habitat;
BSA is outside the
current
known geographic range
for
nesting.
ST
(nesting)
Breeds over grasslanddominated
habitats in North
America.
Buteoswains
oni
Swainson’s
hawk
—
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TABLE4.4
SPECIALSTATUSWILDLIFESPECIESREPORTEDFRO ‐3
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State
Species
CommonNam
e
FederalStatus
Status Habitata PotentialtoOc
Limited potential to cur
occur
for foraging and
nesting;
marginally suitable
foraging
and nesting habitat.
Inhabits open grasslands,
meadows,
or marshes close to
isolated,
dense-topped trees for
nesting and
perching.
FP
(nesting) Elanusleucu
rus
white-tailed
kite
—
Limited potential to
occur
for foraging; not
expected to
occur for nesting;
marginally
suitable foraging
habitat;
BSA is outside the
current
known geographic range
for
nesting.
Prefers vast open space areas
such as
estuaries, grasslands, and
deserts.
Nests in conifers or deciduous
trees in
semi open areas. Does not
nest in
southern California.
Coturnicops
noveboracens
is
WL
(wintering) merlin —
Not expected to occur;
no
suitable habitat.
Coturnicops
noveboracens
is
yellow rail —
—
SSC Inhabits freshwater
marshlands.
Inhabits freshwater marshes,
wet
meadows, and shallow
margins of
saltwater marshes bordering
larger
bays.
Not expected to occur;
no
suitable habitat.
Laterallus
coturniculu
s
jamaicensi
s
California black
rail
ST, FP
Nests in riparian forests along
broad,
lower flood-bottoms of larger
river
systems with willows
(Salixspp.),
often mixed with
cottonwoods
(Populussp.), with
understory of
blackberry (Rubussp.), nettles
(Urtica
sp.), or wild grape
(Vitiscalifornica).
Not expected to occur;
no
suitable habitat.
Coccyzus
occidentali
s
americanus western yellowbilledSE
(nesting) FT (nesting) cuckoo
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TABLE4.4
SPECIALSTATUSWILDLIFESPECIESREPORTEDFRO ‐3
MTHEPROJECTREGION
State
Species
CommonNam
e
FederalStatus
Status Habitata PotentialtoOc
Limited potential to cur
occur
for foraging and
nesting;
marginally suitable
foraging
and nesting habitat.
Inhabits riparian bottomlands
with
tall willows and cottonwoods,
also
belts of live oak along stream
courses.
SSC
(nesting) Asioot
us
long-eared
owl
—
Inhabits open, dry annual or
perennial
grasslands, deserts, and
scrublands
with low-growing vegetation;
uses
California ground squirrel
burrows
and similar openings for
breeding.
Limited potential to
occur;
marginally suitable
foraging
and nesting habitat.
SSC
(burrow
sites)
Athenecunicul
aria
Cypseloidesnig
er
burrowing
owl
black swift
—
—
Nests in dark inaccessible sites
with
unobstructed flight paths on
ledges or
shallow caves in steep rock
faces and
canyons, usually behind or
next to
waterfalls.
Not expected to occur;
no
suitable habitat.
SSC
(nesting)
Inhabits riparian habitat along
rivers,
stream, and other wetlands
with
dense growths of willows,
mule fat
(Baccharissalicifolia ssp.
salicifolia),
etc., often with a scattered
overstory
of cottonwood.
Not expected to occur;
no
suitable habitat.
southwestern
willow
flycatcher
SE
(nesting) Empidonaxtrailliie
xtimus
Vireobelliipusillus
FE (nesting)
Inhabits riparian forest,
riparian
scrub, and riparian woodland,
usually
nesting in willows, mule fat,
or
mesquite (Prosopissp.).
Not expected to occur;
no
suitable habitat.
SE
(nesting) least Bell’s
vireo
FE (nesting)
—
Inhabits short-grass prairie,
“bald”
hills, mountain meadows, open
coastal
plains, fallow agricultural
fields, and
alkali flats.
Not expected to occur;
no
suitable habitat.
Eremophilaalpestrisactia California
horned lark
WL
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TABLE4.4
SPECIALSTATUSWILDLIFESPECIESREPORTEDFRO ‐3
MTHEPROJECTREGION
State
Species
CommonNam
e
FederalStatus
Status Habitata PotentialtoOc
Colonial nester; nests cur
primarily in
riparian and other lowland
habitats
west of the desert. Requires
vertical
banks/cliffs with finetextured/sandy
soils near streams, rivers,
lakes, or
ocean to dig nesting hole.
Not expected to occur;
no
suitable habitat.
Ripariaripa
ria
bank
swallow
— ST
Not expected to
occur;
outside of current
known
range. Cactus wren
of a
different subspecies
may
occur; suitable
habitat.
Inhabits coastal sage scrub
with tall
prickly-pear cactus for nesting
and
roosting. Coastal subspecies
(i.e.,
sandiegensis) occurs in San
Diego and
Orange Counties.
Campylorhynch
us
brunneicapillus
sandiegensis
coastal cactus
wren
— SSC
Polioptila
californica
californica coastal
California
Inhabits coastal sage scrub
in arid
washes, on mesas, and
slopes.
May occur; suitable
habitat.
May occur; suitable
habitat.
FT
—
SSC
WL
gnatcatcher
Inhabits coastal sage scrub and
sparse
mixed chaparral, frequently
on
relative steep, rocky hillsides
with
grass and forb patches.
Aimophila
canescens
ruficeps
southern
California
rufouscrowned
sparrow
Inhabits dense grasslands on
rolling
hills, lowland plains, and
valleys and
on hillsides on lower mountain
slopes.
Not expected to occur;
no
suitable habitat.
Ammodramu
s
savannarum
SSC
(nesting) grasshopper
sparrow
yellow-breasted
chat
tricolored
blackbird
—
—
—
Inhabits riparian thickets of
willow
and other brushy tangles
near
watercourses; nests in low,
dense
riparian vegetation
consisting of
willows, blackberry, and wild
grape.
Not expected to occur;
no
suitable habitat.
SSC
(nesting) Icteriavire
ns
ST, SSC
(nesting
colony)
Inhabits freshwater marsh,
swamps,
and wetlands with open water
and
protected nesting substrate.
Not expected to occur;
no
suitable habitat.
Agelaiustrico
lor
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TABLE4.4
SPECIALSTATUSWILDLIFESPECIESREPORTEDFRO ‐3
MTHEPROJECTREGION
State
Species
Setophagapete
chia
Mammals
CommonNam
e
FederalStatus
Status Habitata PotentialtoOc
cur Inhabits riparian forest,
riparian
scrub, and riparian
woodland,
foraging and nesting in willow
shrubs
and thickets, cottonwoods,
sycamores
(Platanussp.), ash (Fraxinus
sp.), and
alders (Alnus sp.).
Not expected to occur;
no
suitable habitat.
SSC
(nesting) yellow
warbler
—
Limited potential to
occur
for foraging; not
expected to
occur for roosting;
suitable
Inhabits deserts,
grasslands,
shrublands, woodlands, and
forest,
Antrozouspalli
dus
pallid bat — SSC most commonly in open, dry habitats foraging habitat; no suitable with rocky areas for
roosting.
roosting
habitat.
Riparian habitat near water.
Roosts
exclusively in trees,
particularly
sycamore, cottonwood, ash,
and
elderberry
(Sambucussp.).
May occur for foraging
and
roosting; suitable
foraging
and roosting habitat.
Lasiurusfran
tzii
western red
bat
—
—
SSC
SSC
Inhabits valley foothill riparian, desert
riparian, desert wash, and palm oasis
habitats. Roosts in trees, particularly suitable
foraging or roosting
Not expected to occur
for
foraging or roosting;
no
Lasiurusxanthi
nus
western yellow
bat palms. Forages over water and
among
trees.
habitat.
Inhabits many open, semi-arid
to arid
habitats including conifer
and
deciduous woodlands, coastal
scrub,
grasslands, and chaparral.
Roosts in
crevices in cliff faces, high
buildings,
trees, and tunnels.
May occur for foraging
and
roosting; suitable
foraging
and roosting habitat.
Eumops
californicu
s
perotis
western mastiff
bat
— SSC
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TABLE4.4
SPECIALSTATUSWILDLIFESPECIESREPORTEDFRO ‐3
MTHEPROJECTREGION
State
Species
CommonNam
e
FederalStatus
Status Habitata PotentialtoOc
cur Inhabits pinyon-juniper
woodlands,
desert scrub, desert succulent
shrub,
desert riparian, desert
wash, alkali desert scrub,
Joshua tree,
and palm oasis. Roosts in
crevices of
cliffs and rocky
outcroppings.
Not expected to occur;
no
suitable habitat.
Nyctinomop
s
femorosaccu
s
pocketed free-tailed
bat
— SSC
Rugged and rocky terrain;
roosts in
buildings, caves, rock crevices
of cliffs,
and rocky outcroppings.
Not expected to occur;
no
suitable habitat.
Nyctinomopsmacr
otis
Chaetodipusfallax
fallax
big free-tailed
bat
—
—
SSC
SSC
Inhabits coastal scrub,
chaparral,
grasslands, and sagebrush,
usually in
association with rocks or
coarse
gravel.
northwestern San
Diego
pocket mouse
May occur; suitable
habitat.
Inhabits sparse scrub habitat,
alluvial
scrub/coastal scrub habitats
on
gravelly and sandy soils near
river
and stream terraces.
Not expected to
occur;
outside current
known
geographic range.
Dipodomy
s
parvus
merriami
San
Bernardino FE
—
—
CE, SSC
SSC
kangaroo
rat
Inhabits coastal scrub with
moderate
to dense canopies, rock
outcrops,
rocky cliffs, and slopes.
Neotomabryanti [lepida] Bryant’s
[San Diego
intermedia
May occur; suitable
habitat.
May occur; suitable
habitat.
desert]
woodrat
Inhabits dry, open, treeless
areas;
grasslands, coastal scrub,
agriculture,
and pastures, especially with
friable
soils.
Taxideatax
us
American
badger
SSC
Limited potential to
occur
for foraging; not
expected to
deb (breed) in the
BSA;
potentially suitable
habitat
but fragmented from
larger
areas of open space;
no
mountain
Southern
California/Central
Coast
Evolutionary
Significant
Unit (ESU)
lion–
Inhabits various habitats
within
foothill and mountain areas
typically
where deer can be found.
Pumaconco
lor
— CE
suitable breeding
habitat.
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TABLE4.4
SPECIALSTATUSWILDLIFESPECIESREPORTEDFRO ‐3
MTHEPROJECTREGION
State
Species
CommonNam
e
FederalStatus
Status Habitata PotentialtoOc
Occur between from 3,000 to cur
10,000
feet above msl and graze and
browse
in areas of low growing
vegetation
close to steep terrain. Occur in
steep
slopes and cliffs, rough and
rocky
topography, sparse
vegetation,
canyons, washes, and alluvial
fans.
Water is a critical factor in
the
Not expected to occur;
no
suitable habitat.
Oviscanadensis
nelsoni
desert bighorn
sheep
— FP
distribution of this
msl: mean sea level; BSA: Biological Study Area; USFWS: U.S. Fish and Wildlife Service; CDFW: California sheep.
Department of Fish and Wildlife. LEGEND:
Federal(USFWS
)
FE Endangered
FT Threatened
State(CDFW
)
SE Endangered
FPT Proposed Threatened FP Fully ST Threatened
Protected
CE Candidate
Endangered
SSC Species of Special
Concern
WL Watch List
a Sources include CDFW 2023a
b Protected by
CaliforniaFishandGameCode §§ 4800-
4810
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Monarch
Butterfly
The monarch butterfly (Danausplexippus) is a federal Candidate1 species that is not yet listed
or proposed for listing. While the USFWS determined that listing the species as Threatened
is warranted, it is precluded by higher priority actions. Monarch butterflies lay their eggs on
the obligate milkweed (Asclepias sp.). Multiple generations of monarchs are produced
through the breeding season, with most adult butterflies living two to five weeks.
Overwintering adults enter reproductive diapause and live for six to nine months (USFWS
2023c). Each spring, monarchs leave overwintering sites and disperse across California and
eventually migrate to all western states, searching for milkweed plants on which to lay their
eggs. Several generations are produced throughout the spring, summer, and fall, with each
generation spreading further across the landscape. The last generation then migrates all the
way back to the overwintering grounds on the Pacific coast in the fall.
Monarchs return to
the same groves of trees each year (Xerces Society 2023). In the western U.S., monarchs
overwinter at groves of trees along the Pacific Coast with a large concentration
overwintering in California. Currently, the most common overwintering groves consist of
non-native blue gum (Eucalyptus sp.), but they also use native Monterey pine (Pinusradiata),
Monterey cypress (Hesperocyparismacrocarpa), western sycamore, and redwood (Sequoia
sempervirens). The majority of overwintering sites are found within 1.5 miles of the Pacific
Ocean, which moderates temperatures, at lower elevations (i.e., 200 to 300 feet above msl)
and situated on slopes oriented to the south, southwest, or west that provide the most solar
radiation (Xeres Society 2016). An overwintering site was reported in Schabarum Regional
Park in Rowland Heights, approximately 7.5 miles southwest of the BSA; 60 individuals were
observed in 1998, 2 in 1999, 7 in 2002, 6 in 2007, 25 in 2008, and 0 were observed in 2022
(Xeres Society 2023).
Monarch butterfly was recorded as an incidental observation during the 2022 general
surveys and its hostplant, milkweed, was noted during botanical surveys.
The BSA is over 50
miles from the Pacific Ocean and the elevation of the BSA is higher than typical overwintering
sites (i.e., 680 to 980 feet above msl). Additionally, there are no known overwintering sites
mapped in the BSA (Xeres Society 2023). Therefore, Monarch butterfly is not expected to
overwinter in the BSA.
Crotch
Bumblebee
Crotch bumble bee is a Candidate to be State listed as Endangered. The Crotch bumble bee
was proposed as a Candidate to be State listed as Endangered in June 2019. The status of the
Crotch bumble bee has changed multiple times based on court rulings between June 2019
and September 2022. Based on the most recent ruling by the California Supreme Court, the
proposed Candidate status was reinstated.
This species is a near endemic species in California. It occurs throughout most of
southwestern California including the Mediterranean region, along the Pacific coast, western
deserts, Great Valley and adjacent foothills (Williams 2014; Zungri 2005).
The Crotch bumble
bee is a ground nester and often makes its nest in abandoned mammal burrows and can be
1 The USFWS does not treat Candidate species as if they are listed until they are formally proposed for listing.
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found in most native habitat types, although it prefers grassland and scrub habitats. Crotch
bumble bee is a short-tongued species and prefers food plants from the following families:
Asclepias, Chaenactis, Lupinus, Medicago, Phacelia, and Salvia (Williams 2014). The CNDDB
lists favored foodplants from the following genera:
Antirrhinum,Phacelia,Clarkia,
Dendromecon,Eschscholzia,andEriogonum (CDFW 2023a).
Grassland and scrub habitat, as
well as several plant species from these families are present; therefore, suitable habitat is
present for this species. This species has been historically and recently observed at multiple
locations in the Project region. The most recent nearby observations of this species were in
Claremont, Glendora, San Gabriel Canyon, and Chino Hills State Park in 2019 and 2020
(CDFW 2023a). Therefore, this species may occur in the BSA.
Swainson’s
Hawk
Swainson’s hawk is a State-listed Threatened species; its nesting locations are protected. It
forages over grassland and ruderal vegetation types during migration to and from South
America, primarily feeding on small rodents, reptiles, and some insects within these habitats.
This species formerly bred along the coast in southern California, but breeding is now mostly
limited to the Sacramento and San Joaquin valleys, the extreme northeast part of California,
as well as Mono and Inyo counties (England et al. 1997). This species is threatened by loss of
habitat, habitat deterioration on the South American wintering grounds, human disturbance
at nest sites, shooting, and possibly pesticides (Remsen 1978). There are two historic
records from Chino (1920) and Prado Basin (1916), but no recent records of this species in
the Project region (CDFW 2023a). Marginally suitable foraging habitat for this species is
present throughout the BSA; therefore, it may forage over the BSA during migration.
However, it is not expected to nest in the BSA because it does not nest in the Project region.
Golden
Eagle
Golden eagle is a California Species of Special Concern and a California Fully Protected
species; it is also protected by the federal Bald Eagle Act. Habitat for this species generally
consists of grasslands, deserts, savannas, and early successional stages of forest and shrub
habitats. Broad expanses of open country are required for foraging, while nesting is
primarily restricted to rugged mountainous areas with large trees or on cliffs (Johnsgard
2001). The golden eagle is an uncommon resident throughout Southern California except in
the Colorado Desert and Colorado River where it is a casual winter visitor (Garrett and Dunn
1981). This species is threatened by habitat destruction, shooting, and human disturbance
at nest sites (Remsen 1978). This species has been reported from Chino Hills (CDFW 2023a).
Suitable foraging habitat is present for this species throughout the BSA; however, no suitable
nesting habitat is present. Therefore, the golden eagle has a limited potential to occur for
foraging but is not expected to occur for nesting in the BSA.
White-tailed
Kite
White-tailed kite is a California Fully Protected species; its nesting locations are protected.
This species nests in oak and sycamore woodlands, mature willows with adjacent grasslands,
agricultural fields, and other open areas. Kites prey on voles (Microtus sp.) and other small,
diurnal mammals, occasionally on birds, insects, reptiles, and amphibians. Kites forage in
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undisturbed, open grasslands, meadows, farmlands, and emergent wetlands. They soar,
glide, and hover (i.e., “kite”) less than 100 feet above the ground in search of prey. This
species has been reported from Prado Basin and also Chino Hills (CDFW 2023a). Marginally
suitable foraging and nesting habitat for this species is present throughout the BSA;
therefore, it has a limited potential to occur for foraging and nesting.
Burrowing
Owl
Burrowing owl is a California Species of Special Concern; its breeding and wintering burrows
are protected. The western burrowing owl is a grassland specialist distributed throughout
western North America, where it occupies open areas with short vegetation and bare ground
within shrub, desert, and grassland environments. Burrowing owls use a wide variety of arid
and semi-arid environments, with well-drained, level to gently sloping areas characterized
by sparse vegetation and bare ground (Haug et al. 1993; Dechant et al. 2003). Burrowing
owls in Florida excavate their own burrows, but western burrowing owls depend upon the
presence of burrowing mammals whose burrows are used for roosting and nesting (Haug et
al. 1993). The presence or absence of colonial mammal burrows (e.g., California ground
squirrels) is often a major factor that limits the presence or absence of burrowing owls. In
Southern California, burrowing owls breed and forage in grasslands and prefer flat to low
rolling hills in treeless terrain. They are small owls that nest in burrows, typically in open
habitats most often along banks and roadsides. The burrowing owl has declined in many
other areas due to habitat modification, poisoning of its prey items, shooting, and human
disturbance (Remsen 1978). This species has been reported from Chino Creek, Prado Basin,
Chino Airport, and Ontario (CDFW 2023a). The upland mustards or star thistle field and
upland mustard or star thistle fields (mowed) may have vegetation that is too dense to
support this species; even after mowing, there is a thick layer of thatch that is not favored by
the species that prefers low density vegetation. Therefore, burrowing owl has a limited
potential to occur for breeding or wintering in the BSA.
Coastal California
Gnatcatcher
Coastal California gnatcatcher is a federally listed Threatened species and a California
Species of Special Concern. This species occurs in most of Baja California, Mexico’s arid
regions, but this subspecies is extremely localized in the United States, where it
predominantly occurs in coastal regions of highly urbanized Los Angeles, Orange, Riverside,
and San Diego Counties (Atwood 1992). In California, this subspecies is a resident of coastal
sage scrub vegetation types. The breeding season for the coastal California gnatcatcher
ranges from late February to August. Nests are generally placed in a shrub about three feet
above ground. Loss of habitat to urban development and brood parasitism2 by brownheaded cowbirds (Molothrusater) have been cited as causes of coastal California gnatcatcher
population decline (Unitt 1984; Atwood 1990). This species has been reported from many
locations in the Project region; the nearest locations to the BSA are Bonelli Regional Park,
Walnut Creek, San Jose Hills, Schabarum Park, Chino Hills, Puente Hills (CDFW 2023a).
2 Brood parasitism is when one species lays its eggs in another species’ nest and the young are raised by the host bird,
often to the detriment of their biological young.
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Suitable habitat for coastal California gnatcatcher occurs in coastal sage scrub vegetation
types in the BSA. Therefore, this species may occur in the BSA.
USFWS published a Revised Final Rule designating Critical Habitat for the coastal California
gnatcatcher in 2007 (USFWS 2007). This Revised Critical Habitat designates 197,303 acres
in San Diego, Orange, Riverside, San Bernardino, Los Angeles, and Ventura Counties. The BSA
is not located within the designated Revised Critical Habitat for the coastal California
gnatcatcher.
Mountain
Lion
The mountain lion is currently a Candidate to be State listed as Threatened as an
Evolutionary Significant Unit comprised of the following subpopulations: (1) Santa Ana
Mountains; (2) Eastern Peninsular Ranges; (3) San Gabriel/San Bernardino Mountains; (4)
Central Coast South (Santa Monica Mountains); (5) Central Coast North (Santa Cruz
Mountains); and (6) Central Coast Central. CDFW is in the process of reviewing the petition
for listing and evaluating available information. CDFW status review report was expected in
November 2021; as of October 2023, its status has not been updated (CDFW 2023f). The
mountain lion occurs throughout most of California except for the Mojave and Colorado
Deserts and the croplands of the Central Valley. Mountain lions occur in a variety of habitats,
especially brushy habitats and riparian areas with interspersed irregular terrain, rocky
outcrops, and tree/brush edges. Mountain lions use caves, natural cavities, and thickets for
cover. Mountain lions use habitat connections for movement among fragmented core habitat
(Zeiner et al. 1988–1990). A major threat to this species is fragmentation of habitat by spread
of human developments and associated roads. Estimates of effective population size
highlight genetic isolation and raise significant concerns for viability in Southern California
and the Central Coast (Center for Biological Diversity 2019). As described above under
wildlife movement, the BSA is surrounded by higher density residential development,
located approximately 0.5 mile from larger areas of open space in the East San Gabriel Valley
SEA (i.e., Walnut Creek, Bonelli Park). Additionally, there are significant barriers to
movement separating the BSA from these areas of open space, including SR-57 and I-10.
While potentially suitable habitat is present in the BSA, because the BSA is in a fragment of
open space, mountain lions have limited potential to occur. They would not be expected to
den (breed) in the BSA.
4.1.4 IMPACTANALYSIS
The Project involves a municipal code text amendment, which would allow for grading, cut,
and fill, beyond the grading that is necessary for the primary residence, driveway, and garage
for properties located within the proposed MCTA planning area. At this time, no specific
construction activities are currently proposed. Because the future homeowner projects are unknown, the maximum potential impact area is analyzed.
It should be noted that because the environmental document for SP-11 is being modified, the
Project must be evaluated according to current regulatory requirements, some of which have
changed since the initial Specific Plan was adopted. For example, new species have been
listed under the federal and State Endangered Species Acts; the potential for these species to
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occur and the requirements resulting from potential impacts must be evaluated by today’s
standards within this Biological Resources section.
Each parcel is divided up into different categories of varying size (Figure 4.4-4). The pink
areas in Figure 4.4-4 represent 35 percent of the existing lot (by area) including existing
structures, landscaping, and currently undeveloped areas. The blue areas in Figure 4.4-4
represent a conceptual grading extent that extends 20 feet beyond the 35 percent lot
coverage area and is the area anticipated to be the most typical area of impact for future
home-owner projects to create more usable space in their backyards.
However, the text
amendment would allow home-owners to grade their yard in any configuration within the
1,000 cy limit; therefore, a worst-case scenario is analyzed. The purple areas in Figure 4.4-4
represent the remainder of the lot. The total of these three areas represents the maximum
potential impact area for each lot. The green areas in Figure 4.4-4 represent the existing
conservation easement; these areas would not change following the text amendment, they
would remain as open space and could not be impacted by future homeowner projects. The determination of impacts in this analysis is based on a comparison of maps depicting
maximum potential impact area and maps of biological resources in the BSA.
All future permanent structural impacts are assumed to be contained within the maximum
potential impact area (i.e., the pink, blue, and purple areas identified on Figure 4.4-4). All
construction activities, including equipment staging areas, and remedial grading are also
assumed to be contained within these areas.
Vegetation types and other areas that would potentially be impacted by the Project are
shown in Table 4.4-4 and Figure 4.4-5.
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San Dimas
MCTA
Legend
Project
Boundary
Project Parcels
35% Lot Coverage
Conservation
Easement Grading Area – 20 feet
beyond
35% Impact Area Limit Rancho Remainder of
Parcel
24 23
22 25
17 21
18 19 26 20
16 Key Map 27
15 §¨15
28 §¨
14 ANGELES
NATIONA
L
F
210
Project §¨
Location
215 13 ST2 Bernardin
o
29 §¨
ST ST 30 110 210
ST §¨
710 10 12 §¨
Los § Angeles ¨
31 10 30 605
§¨
32 ST60 710 ST142 ST §¨
72 ST
71 33 Riverside 105
ST Orange ST91 19 §¨ 11 34 36 ST91 5 ST57 ST90
35 ²
0 175
50 350
10 Feet
9 1
0 100
8 Meters Scale: 1:4,200
7 5 2
6 4 3 Data Source: UltraSystems
(2022)
Aerial Source: Nearmap
2023
Project
Impacts
Figure 4.4-4
(Rev: 01/05/2024 PLO)
R:\Projects\SAN04\3SAN040200\Graphics\Bio_NMD\ex_Project_Impacts.pdf
UpdatedBiologicalResourc
esSection
TABLE4.4‐4
VEGETATIONTYPESANDO
THERAREAS
INTHEBSA
Maximum
Totalinth
e
Conservation
Easement
(acres)
TotalVegetatio
n
inBSA
Potential
ImpactAre
a
(acres)
VegetationTypeorOther
Area
CoastalSageScrub
(acres)
California Sagebrush Scrub
(Disturbed)
California Buckwheat Scrub
0.089
2.000
1.927
0.089
0.960
0.074
0.000
1.040
California Buckwheat Scrub 1.853
(Disturbed) California Sagebrush – California
Buckwheat
Scrub
0.251 0.022 0.229
California Sagebrush – Black
Sage Scrub
Coast Prickly Pear Scrub
3.480
3.848
11.595
1.590
0.329
3.064
1.890
3.519
8.531
SubtotalCoastalSag
eScrub
NativeWoodland California Walnut Groves
California Walnut Groves
(Disturbed)
Coast Live Oak Woodland
(Disturbed)
SubtotalNativeWoodland
Non‐NativeWoodland
27.057
12.529
1.801
7.850
1.920
0.982
10.752
19.207
10.609
0.819
41.387
30.635
Pepper Tree
Groves
0.657
0.797
1.454
0.000
0.652
0.652
0.657
0.145
0.802
Eucalyptus
Groves SubtotalNon‐NativeWoodland
Non‐NativeHerbaceous
Upland Mustards or Star-thistle Fields
Upland Mustards or Star-thistle Fields
(mowed)
SubtotalNon‐NativeHerbaceous
DevelopedAreas
9.179
12.094
21.273
2.048
6.011
8.059
7.131
6.083
13.214
Developed/Ornament
al
20.954
20.954
96.663
18.428
18.428
40.955
2.526
2.526
SubtotalDeveloped
Areas
Total
55.708
The following analysis addresses “direct” and “indirect” impacts. Direct impacts are those
that involve the initial loss of habitat or individuals due to vegetation clearing and
construction-related activities. Indirect impacts would be those related to impacts on the
adjacent habitat due to construction activities (e.g., fugitive dust, noise, and the long-term
use of a project).
a) Wouldtheprojecthaveasubstantialadverseimpact,
eitherdirectly or
throughhabitatmodifications,onanyspeciesidentifiedas
acandidate,
sensitive,orspecialstatusspeciesinlocalorregional
plans,policies,or
MUNICIPAL CODE TEXT AMENDMENT 20-
0005 PROJECT
4-64
RECIRCULATED DRAFT INITIAL STUDY/MITIGATED
NEGATIVE DECLARATION
San Dimas
MCTA
Legend
Project
Boundary
Parcel
Conservation
Easement
35% Lot Coverage Grading Area – 20 feet
beyond
35% Impact Area Limit Rancho E
E
E
E
E
E
E
E Remainder of
Parcel Coastal Sage Scrub
California Sagebrush Scrub
(Disturbed)
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
California Buckwheat
Scrub
California Buckwheat Scrub (Disturbed)
California Sagebrush - California
Buckwheat Scrub
California Sagebrush - Black Sage Scrub
Coast Prickly Pear Scrub
24 E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
23E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
22E
E
E
E
E
E
E
E
E
E
E
E
E
E
25E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
Native
Woodland 17
E21
E
E
E
E
E
E
E
E
E
California Walnut
Groves
E 1E 8E E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
19 E 2E6E California Walnut Groves
(Disturbed)
Coast Live Oak Woodland
(Disturbed)
E
E
E
E
E
E 2E 0E E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
Non-Native
Woodland
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E16
E
E
E Pepper Tree
Groves
Eucalyptus Groves
E 2E7E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
15 E 28 1
E 4E E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
Non-Native
Herbaceous E 1
E3E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
Upland Mustards or Star-thistle Fields
Upland Mustards or Star-thistle Fields
(Mowed)
Developed Areas
Developed/Ornamental
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E2E9E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
1 E2E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
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E
E
E
E
E
E
E
E
E
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E
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E
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E
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E
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E
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E
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E
E
E
E
E
E
E
E
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E
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E
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E
E
E
E
E
E
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E
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E
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E
E
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E
E
E
E
E
E
E
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E
E
E
E
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E
E
E
E
E
E
E
E
E
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E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
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E
E
E
E
E
E
E
E
E
E
E
E
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E 3E 1E
E3 0E
E
E
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E
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E
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E
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E
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32 E
E
E
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E
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E
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E33E
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Scale: 1:4,200
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5 Data Source: Vegetation map developed by
UltraSystems (2022)
and updated by Psomas
(2023)
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Aerial Source: Nearmap
2023
Project Impacts – Vegetation
Types and Other
Areas
Figure 4.4-5A (Rev: 01/05/2024 PLO)
R:\Projects\SAN04\3SAN040200\Graphics\Bio_NMD\ex_ProjectImpacts_VegTypes.pdf
San Dimas
MCTA
B Legend
Project
Boundary
Parcel C D
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beyond
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Developed Areas
Developed/Ornamenta
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0 0
87.5 25
175
Feet
1 E E
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E E E 50
Meters
E21
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E Scale: 1:2,100
1 E
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Data Source: Vegetation map developed by
UltraSystems (2022)
and updated by Psomas
(2023)
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Aerial Source: Nearmap
E19 26 2023
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E20E
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Project Impacts – Vegetation
Types
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and Other
Areas
Figure 4.4-5B
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E E E 28 (Rev: 01/05/2024 PLO)
R:\Projects\SAN04\3SAN040200\Graphics\Bio_NMD\ex_ProjectImpacts_VegTypes_B-D.pdf