HomeMy WebLinkAboutPA2024-0069_2025.05.23_Draft EIR_Appendix I. Paleontologcal Resources Assessment
CARLSBAD
CLOVIS
IRVINE
LOS ANGELES
PALM SPRINGS
POINT RICHMOND
RIVERSIDE
ROSEVILLE
SAN LUIS OBISPO
3210 El Camino Real, Suite 100, Irvine, California 92602 949.553.0666 www.lsa.net
March 3, 2025
Adam Cleary
Back Bay Barrels, LLC
3857 Birch Street, Suite 521
Newport Beach, CA 92660
Subject: Paleontological Resources Assessment for the Snug Harbor Project in Newport Beach,
Orange County, California (LSA Project Number 20242006)
Dear Mr. Cleary:
LSA conducted a Paleontological Resources Assessment for the Snug Harbor Project (project) in
Newport Beach, Orange County, California. The purpose of the assessment was to determine
whether paleontological resources may be present within the project site and whether they might
be impacted by development of the project, and to make recommendations to mitigate any
potential impacts to paleontological resources. The project area contains Young Axial Channel
Deposits, which have low sensitivity from the surface to a depth of 10 feet and high paleontological
sensitivity below that mark. Additionally, the project area contains Old Paralic Deposits Overlain by
Alluvial Fan Deposits, which have high paleontological sensitivity. Development of the project has
the potential to impact paleontologically sensitive deposits and the paleontological resources they
may contain. In order to mitigate potential impacts to scientifically significant nonrenewable
paleontological resources, LSA recommends development of a Paleontological Resources Impact
Mitigation Program (PRIMP) and paleontological monitoring for excavations into sediments with
high paleontological sensitivity.
PROJECT LOCATION AND DESCRIPTION
The project is located at located at 3100 Irvine Avenue (Assessor’s Parcel Number 119-200-41) in
Newport Beach. The project is bounded by Irvine Avenue to the north and west, Mesa Drive to the
southwest, and Acacia Street to the east. The 15.44-acre project site is depicted on Figure 1
(provided in Attachment B) on the United States Geological Survey (USGS) Newport Beach,
California 7.5-minute topographic quadrangle map in Township 6 South, Range 10 West, in
unsectioned lands of the Santiago De Santa Ana and San Joaquin land grants, San Bernardino
Baseline and Meridian (USGS, 1981).
The proposed project includes development of a 5.06-acre surf lagoon. Outdoor areas around the
lagoon will be developed to provide seating and lounging areas, wave viewing platforms for
spectators, private cabanas with bathrooms and showers, and three warming pools. Two new
buildings are proposed. The main building will be three stories tall over a subterranean basement,
with a maximum height of 50 feet above grade. It will house ancillary uses such as health and fitness
facilities, a surf-related retail store, locker rooms, storage lockers, and food service. A second,
LSA
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smaller building providing 20 overnight athlete accommodations will be two stories tall and 40-feet
above grade. The square footage of the new buildings totals approximately 79,534 square feet.
REGULATORY ENVIRONMENT
State of California
Under State law, paleontological resources are protected by the California Environmental Quality
Act (CEQA) and Public Resources Code Section 5097.5.
California Environmental Quality Act (Public Resources Code 21000 et seq.)
CEQA’s purpose is to provide a statewide policy of environmental protection. As part of this
protection, State and local agencies are required to analyze, disclose, and, when feasible, mitigate
the environmental impacts of, or find alternatives to, proposed projects. The State CEQA Guidelines
(California Code of Regulations 15000 et seq.) provide regulations for the implementation of CEQA
and include more specific direction on the process of documenting, analyzing, disclosing, and
mitigating environmental impacts of a project. To assist in this process, Appendix G of the State
CEQA Guidelines provides a sample checklist form that may be used to identify and explain the
degree of impact a project will have on a variety of environmental aspects, including paleontological
resources (Section VII[f]). As stated in Section 15002(b) (1-3) of the State CEQA Guidelines, CEQA
applies to governmental action, including activities that are undertaken by, financed by, or require
approval from a governmental agency.
California Public Resources Code, Section 5097.5
This law protects historic, archaeological, and paleontological resources on public lands within
California and establishes criminal and civil penalties for violations. Specifically, Public Resources
Code Section 5097.5 states that “No person shall knowingly or willfully excavate upon, remove,
destroy, injure, or deface any … paleontological or historical feature, situated on public lands” and
that public lands include lands “… under the jurisdiction of the state, or any city, county, district,
authority, or public corporation, or any agency thereof.”
City of Newport Beach
The City of Newport Beach’s (City) General Plan sets forth the goals and policies that the City uses to
protect and sustain Newport Beach’s historic and paleontological resources (City of Newport Beach,
2006). The following excerpt from the City’s General Plan contains the goal and policy designed to
protect paleontological resources within Newport Beach:
Goal HR 2: Identification and protection of important archeological and
paleontological resources within the City.
Policy HR 2.1: New Development Activities
Require that, in accordance with CEQA, new development protect and preserve
paleontological and archaeological resources from destruction, and avoid and
mitigate impacts to such resources. Through planning policies and permit
LSA
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conditions, ensure the preservation of significant archeological and
paleontological resources and require that the impact caused by any
development be mitigated in accordance with CEQA.
Policy HR 2.2: Grading and Excavation Activities
Maintain sources of information regarding paleontological and archeological
sites and the names and addresses of responsible organizations and qualified
individuals, who can analyze, classify, record, and preserve paleontological or
archeological findings.
Require a qualified paleontologist/archeologist to monitor all grading and/or
excavation where there is a potential to affect cultural, archeological or
paleontological resources. If these resources are found, the applicant shall
implement the recommendations of the paleontologist/archeologist, subject to
the approval of the City Planning Department.
HR 2.4: Paleontological or Archaeological Materials
Require new development to donate scientifically valuable paleontological or
archaeological materials to a responsible public or private institution with a
suitable repository, located within Newport Beach, or Orange County, whenever
possible.
METHODS
LSA examined geologic maps of the project site and reviewed relevant geological and
paleontological literature to determine which geologic units are present within the project site and
whether fossils have been recovered within the project site or from those or similar geologic units
elsewhere in the region. In October 2024, a fossil locality search was conducted through the Natural
History Museum of Los Angeles County (NHMLAC) to determine the status and extent of previously
recorded paleontological resources within and surrounding the project site.
RESULTS
Literature Review
Geologic mapping by Morton and Miller (2006) shows that the project site is underlain by Young
Axial Channel Deposits and Old Paralic Deposits Overlain by Alluvial Fan Deposits. Although not
mapped, Artificial Fill is also present due to the previous construction and use of the project site.
These geologic units and their paleontological sensitivities are described in more detail below. Dates
for the geologic time intervals referenced in this report are derived from the International
Chronostratigraphic Chart published by the International Commission on Stratigraphy (Cohen et al.,
2023).
LSA
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Artificial Fill
Artificial Fill consists of sediments that have been removed from one location and transported to
another location by human activity rather than by natural means. The transportation distance can
vary from a few feet to miles, and composition is dependent on the source and purpose.
Artificial Fill will sometimes contain modern debris such as asphalt, wood, bricks, concrete, metal,
glass, plastic, and even plant material. While Artificial Fill may also contain fossils, these fossils have
been removed from their original location and are thus out of stratigraphic context. Therefore, they
are not considered important for scientific study, and Artificial Fill has no paleontological sensitivity.
Young Axial Channel Deposits
The Young Axial Channel Deposits are Holocene to late Pleistocene in age (less than 126,000 years
ago) and consist of slightly to moderately consolidated silt, sand, and gravel (Morton and Miller,
2006). They formed as streams and washes carried sediment down from higher elevations in the San
Joaquin Hills and foothills of the Santa Ana Mountains.
Although Holocene (less than 11,700 years ago) deposits can contain remains of plants and animals,
only those from the middle to early Holocene (4,200–11,700 years ago; Walker et al., 2012) are
considered scientifically important (SVP, 2010), and fossils from this time interval are not very
common. The Holocene deposits overlie older, Pleistocene deposits, which have produced
scientifically important fossils elsewhere in Orange County and the region (Jefferson 1991a, 1991b;
Miller, 1971; Reynolds and Reynolds, 1991; Springer et al., 2009). These older, Pleistocene deposits
span the end of the Rancholabrean North American Land Mammal Age (NALMA), which dates from
11,000 to 240,000 years ago (Sanders et al., 2009) and was named for the Rancho La Brea fossil site
in central Los Angeles. The presence of Bison defines the beginning of the Rancholabrean NALMA
(Bell et al., 2004), but fossils from this time also include other large and small mammals, reptiles,
fish, invertebrates, and plants (Jefferson, 1991a, 1991b; Miller, 1971; Reynolds and Reynolds, 1991;
Springer et al., 2009). There is a potential to find these types of fossils in the older sediments of this
geologic unit, which may be encountered below a depth of approximately 10 feet (ft). Therefore,
these deposits are assigned low paleontological sensitivity from the surface to a depth of 10 ft and
high sensitivity below that mark.
Old Paralic Deposits Overlain by Alluvial Fan Deposits
Geologic mapping by Morton and Miller (2006) shows that the project area contains Old Paralic
Deposits Overlain by Alluvial Fan Deposits, which are late to middle Pleistocene in age (11,700–
781,000 years ago). They are composed of poorly sorted mixtures of silt, sand, and cobbles that are
reddish-brown in color and capped by discontinuous, thin layers of younger, locally derived sands
(Morton and Miller, 2006). These deposits originally accumulated in shallow marine, beach, and
estuarine environments, and since have been uplifted and exposed, forming wave-cut platforms on
which younger alluvial deposits formed (Morton and Miller, 2006).
Because these deposits accumulated in marine and estuarine environments during the late to
middle Pleistocene, they have the potential to preserve both marine and terrestrial animals and
LSA
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plants from the Rancholabrean and Irvingtonian NALMAs (Bell et al., 2004; Sanders et al., 2009).
Fossils recovered from these NALMAs around Southern California include large and small mammals,
reptiles, fish, invertebrates, and plants (Bell et al., 2004; Jefferson, 1991a, 1991b; Miller, 1971;
Reynolds and Reynolds, 1991; Springer, 2009). Because there is a potential to encounter these types
of fossils in the Old Paralic Deposits Overlain by Alluvial Fan Deposits, they are considered to have
high paleontological sensitivity.
Fossil Locality Search
According to the fossil locality search conducted by the NHMLAC, there are no known fossil localities
within the boundaries of the project, but there are five localities near the project from geologic units
within or similar to those found within the project area. LACM IP 4929, located in the drainage
channel north of Irvine Avenue in Costa Mesa, yielded invertebrate fossils (Ostrea and Anomia).
LACM IP 31222, from an unspecified location in Newport Beach, yielded Venerid bivalve (Chione).
The southwest end of the Newport Freeway, between Santa Isabel Avenue and 23rd Street,
produced several fossils, including camel (Camelidae), sea turtle (Cheloniidae), uncatalogued fish
and birds, and invertebrates (EntobaLottia, Caesia, Volvania, Ala, Eulithidium, Chama, Glossaulax,
Agthistoma, Sinum, Chlorostoma, Calianax, Ophidiodermella, Serpulorbis, Argopecten, and others).
LACM VP 6370, near the intersection of Superior Avenue and Pacific Coast Highway, yielded horse
(Equus), other unspecified mammals, and invertebrates such as clams (Tivela, Donax, Lucinisca),
scaphopod (Dentalum, Antalis), and marine gastropods (Glossaulax, Chlorostoma). At the final
locality, LACM IP 6281, from the south side of a bluff south of Bayview School and west of the San
Joaquin Gun Club, several invertebrates were recovered, including Crassinella, Lucinoma,
Dendraster, Cyclocardia, Entobia, Sessilia, Dentalium, Semele, Homalopoma, Caryocorbula,
Diplodonta, Anomia, Chione, Chionopsis, Mexicardia, Donax, and Chrysallida. A copy of the NHMLAC
fossil locality search results letter is included in Attachment C.
RECOMMENDATIONS
The project area contains Young Axial Channel Deposits, which have low sensitivity from the surface
to a depth of 10 feet and high paleontological sensitivity below that mark. Additionally, the project
area contains Old Paralic Deposits Overlain by Alluvial Fan Deposits, which have high paleontological
sensitivity. Development of the project has the potential to impact paleontologically sensitive
deposits and the paleontological resources they may contain. In order to mitigate potential impacts
to scientifically significant nonrenewable paleontological resources, LSA recommends the following
mitigation measure:
PALEO-1 Prior to commencement of any grading activity on site, a paleontologist shall be
retained to develop a Paleontological Resources Impact Mitigation Program (PRIMP)
for this project. The PRIMP shall include the methods that will be used to protect
paleontological resources that may exist within the project area as well as
procedures for monitoring, fossil preparation and identification, curation into a
repository, and preparation of a report at the conclusion of grading. The PRIMP shall
be consistent with the guidelines of the Society of Vertebrate Paleontology (SVP)
and include, but not be limited to, the following:
LSA
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• Excavation and grading activities in deposits with high paleontological sensitivity
(Young Axial Channel Deposits below a depth of 10 feet and Old Paralic Deposits
Overlain by Alluvial Fan Deposits) shall be monitored by a paleontological
monitor following a PRIMP. No monitoring is required for excavations in
deposits with no paleontological sensitivity (Artificial Fill).
• If paleontological resources are encountered during the course of ground
disturbance, the paleontological monitor shall have the authority to temporarily
redirect construction away from the area of the find in order to assess its
significance. In the event that paleontological resources are encountered when
a paleontological monitor is not present, work in the immediate area of the find
shall be redirected and a paleontologist should be contacted to assess the find
for significance. If determined to be significant, the fossil shall be collected from
the field.
• Collected resources shall be prepared to the point of identification, identified to
the lowest taxonomic level possible, cataloged, and curated into the permanent
collections of a scientific institution.
• At the conclusion of the monitoring program, a report of findings shall be
prepared to document the results of the monitoring program.
Implementation of this mitigation measure will ensure that project impacts on paleontological
resources will be reduced to a level that is less than significant.
Sincerely,
LSA Associates, Inc.
Kelly Vreeland
Senior Paleontologist
Attachments: A: References
B: Figures
C: Fossil Locality Search Results from the NHMLAC
LSA
P ALEONTOLOGICAL R ESOURCES A SSESSMENT
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ATTACHMENT A
REFERENCES
Bell, C.J., E.L. Lundelius Jr., A.D. Barnosky, R.W. Graham, E.H. Lindsay, D.R. Ruez Jr., H.A. Semken Jr.,
S.D. Webb, and R.J. Zakrzewski
2004 The Blancan, Irvingtonian, and Rancholabrean Mammal Ages. pp. 232–314. In M.O.
Woodburne (ed.), Late Cretaceous and Cenozoic Mammals of North America:
Biostratigraphy and Geochronology. Columbia University Press, New York.
City of Newport Beach
2006 City of Newport Beach General Plan. Adopted July 25, 2006. Website:
https://www.newportbeachca.gov/government/departments/community-development/
planning-division/general-plan-codes-and-regulations/general-plan (accessed October
2024).
Cohen, K.M., Finney, S.C., Gibbard, P.L., and Fan, J.-X.
2023 The ICS International Chronostratigraphic Chart. (2013; updated September 2023)
Episodes 36: 199-204.
Jefferson, George T.
1991a A Catalogue of Late Quaternary Vertebrates from California: Part One: Non-marine Lower
Vertebrate and Avian Taxa. Natural History Museum of Los Angeles County Technical
Reports No. 5, Los Angeles.
1991b A Catalogue of Late Quaternary Vertebrates from California: Part Two: Mammals. Natural
History Museum of Los Angeles County Technical Reports No. 7, Los Angeles.
Miller, W.E.
1971 Pleistocene Vertebrates of the Los Angeles Basin and Vicinity (Exclusive of Rancho La
Brea), Los Angeles County Museum of Natural History Bulletin, Science: No. 10. 124 pp.
Morton, Douglas M., and Fred K. Miller
2006 Geologic Map of the San Bernardino and Santa Ana 30-minute by 60-minute quadrangles,
California. Digital preparation by Pamela M. Cosette and Kelly R. Bovard. Prepared by the
United States Geological Survey (USGS) in cooperation with the California Geological
Survey. USGS Open File Report 2006-1217. Map Scale 1:100,000.
Reynolds, R.E., and R.L. Reynolds
1991 The Pleistocene Beneath our Feet: Near-surface Pleistocene Fossils in Inland Southern
California Basins. In M.O. Woodburne, R.E. Reynolds, and D.P. Whistler, eds., Inland
Southern California: The Last 70 Million Years, Redlands, San Bernardino County Museum
Special Publication 38(3 and 4): 41–43.
LSA
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Sanders, A.E., R.E. Weems, and L.B. Albright
2009 Formalization of the Middle Pleistocene “Ten Mile Beds” in South Carolina with Evidence
for Placement of the Irvingtonian-Rancholabrean Boundary. Museum of Northern Arizona
Bulletin 64:369-375.
Society of Vertebrate Paleontology (SVP)
2010 Standard Procedures for the Assessment and Mitigation of Adverse Impacts to
Paleontological Resources. Society of Vertebrate Paleontology. Impact Mitigation
Guidelines Revision Committee. 11 pp.
Springer, Kathleen, Eric Scott, J. Christopher Sagebiel, and Lyndon K. Murray
2009 The Diamond Valley Lake Local Fauna: Late Pleistocene Vertebrates from Inland Southern
California. In L.B. Albright, III, ed., Papers in Geology, Vertebrate Paleontology, and
Biostratigraphy in Honor of Michael O. Woodburne, Museum of Northern Arizona Bulletin
65, pp. 217–236.
United States Geological Survey (USGS)
1981 Newport Beach, California 7.5-minute topographic quadrangle. Published 1965,
photorevised 1981. United States Geological Survey, Denver, Colorado.
LSA
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ATTACHMENT B
FIGURES
Figure 1: Project Location and Vicinity Map
Figure 2: Geology Map
LSA
LSA l=l Project Location
$
1000 2000
FEET
SOURCE: USGS 7.5' Quad -Newport Beach {1981/, CA
l:\2024\20242006\GIS\Pro\Snug Harbor Project.aprx (11/25/2024)
FIGURE 1
Snug Harbor Project
Project Location and Vicinity
LSA
$
' ' •
�
. ·•
. .
500 1000
FEET
SOURCE: Morton and Miller (2006)
�
l=I Project Location Geology
-Qaf -Artificial FillB Qes -Very Young Estuarine Deposits
Qop -Old Paralic Deposits, Undivided
Qopf -Old Paralic Deposits Overlain by Alluvial-fan Deposits
1:\ {; Qya -Young Axial-channel Deposits
Water Body
l:\2024\20242006\GIS\Pro\Newport Beach Golf Course Project\Newport Beach Golf Course Project.aprx (11/26/2024)
FIGURE 2
Snug Harbor Project
Geology Map
P ALEONTOLOGICAL R ESOURCES A SSESSMENT
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ATTACHMENT C
FOSSIL LOCALITY SEARCH RESULTS FROM THE NHMLAC
LSA
Research & Collections
e-mail: paleorecords@nhm.org
November 3, 2024
LSA Associates, Inc.
Attn: Kelly Vreeland
re: Paleontological resources records search for the Newport Beach Golf Course Project (LSA Proj. #
20242006)
Dear Kelly:
I have conducted a thorough search of our paleontology collection records for the locality and specimen
data for proposed development at the Newport Beach Golf Course Project area as outlined on the portion
of the Newport Beach USGS topographic quadrangle map that you sent to me via e-mail on October 30,
2024. We do not have any fossil localities that lie directly within the proposed project area, but we do
have fossil localities nearby from the same sedimentary deposits that may occur in the proposed project
area, either at the surface or at depth.
The following table shows the closest known localities in the collection of the Natural History
Museum of Los Angeles County (NHMLA).
Locality
Number Location Formation Taxa Depth
LACM IP 4929
Drainage channel,
north of Irvine
Avenue, Costa
Mesa
Palos Verdes
Sand Invertebrates (Ostrea and Anomia) Surface
LACM IP
31222 Newport, California
Unknown
formation
(Pleistocene) Venerid bivalve (Chione) Unknown
LACM VP
4219
Southwest end of
the Newport Fwy
between Santa
Isabel Ave & 23rd
St
Palos Verdes
Sand (coarse
poorly sorted
friable sand)
Camel family (Camelidae), sea
turtle (Cheloniidae); uncatalogued
fish and birds; invertebrates
(Entobia, Lottia, Caesia, Volvania,
Ala, Eulithidium, Chama,
Glossaulax, Agathistoma, Sinum,
Chlorostoma, Calianax,
Ophidiodermella, Serpulorbis,
Argopecten, and others) 30 feet bgs
LACM VP
6370
near the
intersection of
Superior Avenue &
Pacific Coast
Terrace deposits
(Pleistocene, silty
sandstones)
Horse (Equus), other unspecified
mammals; Invertebrates: clam
(Tivela, Donax, Lucinisca),
scaphopod (Dentalum, Antalis),
Unknown
(found during
grading for
parking lot
Natural History Museum
of Los Angeles County
900 Exposition Boulevard
Los Angeles, CA 90007
tel 213.763.DINO
www.nhm.org
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