CC SR 20240206 02 - Landslide Continuing Emergency Jan 2024
CITY COUNCIL MEETING DATE: 02/06/2024
AGENDA REPORT AGENDA HEADING: Regular Business
AGENDA TITLE:
Consideration and possible action to receive an update report and to extend the local
emergency declaration for the greater Portuguese Bend Landslide Complex.
RECOMMENDED COUNCIL ACTION:
(1) Receive and file an update on:
a. Current conditions from the City Geologist on the Portuguese Bend
Landslide Complex;
b. Current trail conditions impacted by the Portuguese Bend Landslide
Complex within the Palos Verdes Nature Preserve;
c. Project activities responding to land movement within the Portuguese
Bend Landslide Complex;
d. Landslide movement monitoring;
e. Reimbursement requests to the Federal Emergency Management Agency
(FEMA) for landslide activities in response to the California Severe Winter
Storms disaster for the 2022-23 winter rain season;
f. Information on eminent domain;
g. Emergency preparedness activities;
h. City engagement with state and federal officials regarding the Portuguese
Bend Landslide Complex; and
(2) Adopt Resolution No. 2024-__, thereby continuing the local emergency declaration
by 60 days until April 6, 2024 as established by Resolution No. 2023-47 adopted
on October 3, 2023, extended by Resolution No. 2023-56 adopted on November
14, 2023, and extended by Resolution No. 2023-61 adopted on December 19,
2024.
FISCAL IMPACT: Since the accelerated movement resulting from the 2022-23 wet
season, the City has spent a significant amount of funding on immediate measures in
response to that movement. A summary of expenses is being tabulated and will be
provided to the City Council at a future landslide update. Additionally, the City is pursuing
reimbursement for some or all of these costs through FEMA.
Amount Budgeted: N/A
Additional Appropriation: N/A
Account Number(s): N/A
ORIGINATED BY: Ramzi Awwad, Director of Public Works
REVIEWED BY: Same as below
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RANCHO PALOS VERDES
APPROVED BY: Ara Mihranian, AICP, City Manager
ATTACHED SUPPORTING DOCUMENTS:
A. Resolution No. 2024-__ Extending the State of Local Emergency within the
Greater Portuguese Bend Landslide Complex (page A-1)
B. Resolution No. 2023-61 Extending the State of Local Emergency within the Greater
Portuguese Bend Landslide Complex, adopted December 19, 2023 (page B-1)
C. Updated Greater Portuguese Bend Landslide Map (page C-1)
D. January 2024 Landslide Monitoring Survey Report (page D-1)
E. Comprehensive Update of Recent Activities (page E-1)
BACKGROUND:
On October 3, 2023, the City Council conducted a discussion regarding the conditions of
the Greater Portuguese Bend Landslide Complex (Landslide Complex). After considering
information presented that evening, including public testimony, the City Council
unanimously adopted Resolution No. 2023-47 declaring the existence of a local
emergency within the geographic boundaries of the Landslide Complex and adopted
Urgency Ordinance No. 674U, an interim urgency ordinance to establish a temporary 45-
day moratorium on the acceptance or processing of applications, issuance of permits,
and construction of all structures within the Landslide Complex.
At the October 3, 2023 meeting, the City Council also requested Staff return in a few
weeks with an update on immediate measures being taken to address the accelerated
land movement.
On November 14, 2023, the City Council received an update on conditions in the
Landslide Complex and activities underway by various entities to reduce landslide
movement and extended the local emergency by 60 days via Resolution No. 2023-56.
On December 19, 2023, the City Council again received an update on conditions in the
Landslide Complex and activities underway by various entities to reduce landslide
movement and again extended the local emergency by 60 days via Resolution No. 2023-
61. In response to the information presented that evening , the City Council requested the
following at a future meeting:
• Identify additional efforts needed to mitigate landslide movement.
• Determine if water pipe leaks or breaks in neighborhoods outside the Landslide
Complex could be contributing to land movement in the Landslide Complex.
• Assess non-native water in the City and in Rolling Hills, including from landscaping
irrigation and septic systems, that may be seeping into the Landslide Complex and
contributing to land movement.
• Investigate current methods to survey land movement, other than manual
methods, to improve accuracy and affordability. Present the results of additional
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surveys and heat maps previously authorized by the City Council.
• Investigate the possible use of eminent domain to acquire properties in the
Landslide Complex.
• Request that Los Angeles County Public Works provide resources to mitigate
landslide movement.
This evening, the City Council will receive a status update on current conditions and
activities in the Landslide Complex and is being asked to extend the local emergency by
an additional 60 days.
DISCUSSION:
Current Conditions in the Landslide Complex
The Landslide Complex encompasses four historically active landslide areas: the
Portuguese Bend Landslide (PBL), the Abalone Cove Landslide (ACL), the Klondike
Canyon Landslide (KCL), and the Beach Club Landslide (BCL). However, it also includes
areas outside of the historical boundaries of those known landslides, predominantly uphill
from the Portuguese Bend and Abalone Cove landslides, within the Ancient Portuguese
Bend Landslide Complex as mapped by various agencies (i.e., U.S. Geological Survey,
California Geological Survey) and other researchers.
Since the last update to the City Council on December 19, 2023, the City Geologist, Mike
Phipps of Cotton, Shires, and Associates, Inc. conducted additional field mapping
throughout the Landslide Complex, observed conditions at various site-specific locations
impacting residential neighborhoods, public infrastructure, and where trails have been
impacted, and reviewed the most recent GPS monitoring survey between October 2023
and January 2024 (Attachment D). The City Geologist also participated in the weekly
Portuguese Bend Landslide Complex Working Group meetings.
Accelerated ground movement occurred throughout the Landslide Complex during and
following the 2022-23 rainy season which was more than 220% of the historical average
rainfall. Based upon the most recent GPS monitoring survey on January 13, 2024,
average land movement velocities within the Landslide Complex since October 10, 2023
have accelerated by a factor of three to four times compared to the previous 12 month
(Oct 2022-Oct 2023) monitoring period. Expressed another way, the total movement over
the past 3 months (Oct 2023-Jan 2024) is nearly equal to (and in some cases exceeds)
the total movement over the previous entire year’s monitoring period (i.e., Oct 2022 -Oct
2023). Movement of this magnitude has not been previously observed or documented in
the ancient landslide complex north of the historical boundaries of the ACL, PBL and KCL.
Total landslide movements in the upper ancient landslide area are significant and greatly
exceed what has been observed historically. An example of this is highlighted by six GPS
monitoring points in the upper ancient landslide area, in the vicinity of upper Narcissa
Drive and uphill from it. These survey monuments have experienced average
displacements of 4.07 feet over the past 15 months (3.26 feet on an annualized basis).
Average displacements for these six points over the prior annual monitoring period (Sept
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28, 2021-Oct 10, 2022) were 0.36 feet. This represents approximately a 9-fold increase
in total land movement on an annualized basis. Two GPS monitoring points near the toe
of the Abalone Cove Landslide moved an average of 0.76 feet (Sept 2021 -Oct 2022) to
7.30 feet (Oct 2022-Jan 2024) over the same periods, a 9.6-fold increase in displacement.
This indicates that acceleration of the ancient landslide mass behind the historically active
ACL is occurring at approximately the same rate as the ACL movement ove r the past 15
months.
This movement continues to manifest at the ground surface in the form of landslide
scarps, fissures, grabens/sinkholes, tensional cracking, and shear zones. Field mapping
(Attachment C) corroborates the GPS monitoring data, indicating that a large portion of
the ancient Portuguese Bend Landslide Complex above the historically mapped PBL,
ACL and KCL boundaries is now involved in significant active landslide movement that is
impacting trails, roads, and private property and continues to have the potential to impact
above and below ground utility infrastructure (i.e., utility lines, gas lines, water lines,
communication lines, etc.).
Additional evaluations of landslide impact to trails were also recently performed including
the Ford, Eucalyptus and Gary’s Gulch Trails in the Filiorum Reserve, and the Beach
School, Abalone Cove, Chapel View, Olmsted, Smuggler’s and Sacred Cove View Trails
in the Abalone Cove Shoreline Park/Reserve. Many of these trails have been closed as
a result of landslide movements causing unsafe or unmanageable conditions; however
trails will continue to be evaluated and the City Geologist will continue to advise Staff as
to safety for those that can be maintained and remain open, or reopened with some
improvements.
The City Geologist has updated the map of the landslide to show major fissures and areas
where the landslide boundaries have expanded (Attachment C).
The City Geologist will be attending the February 6 meeting to provide the City Council
and public with an updated report since the December 19 meeting.
The City Council is being asked to receive and file a report on current conditions in the
Landslide Complex.
Current Palos Verdes Nature Preserve Trail Conditions within the Landslide Complex
Large parts of the Palos Verdes Nature Preserve (Preserve) are located within the
Landslide Complex. Specifically, the Portuguese Bend Reserve, Abalone Cove Reserve,
and parts of the Forrestal and Filiorum Reserves are located within the Landslide
Complex. Many of these areas are seeing landslide -related damage including fissures,
rockslides, sink holes, unstable trails, and significant erosion . Out of concern for public
safety, and in consultation with the City Geologist, the City Manager has temporarily
closed large areas of these Preserve consisting of approximately 8 miles of passive
recreation trails. Staff continues to monitor these and other trails, and extensive repairs
will likely be needed before these trails can be reopened for public use.
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Land movement has continued in the Reserve, most notably in areas along Burma Road
Trail and on Lower Rim Trail, Garden Trail, Landslide Scarp Trail, Garden Trail, and in
the surrounding landscapes. Portions of Burma Road are no longer accessible by vehicle
and are difficult to traverse on foot. Infrastructure such as utility poles, water mains, and
water lines have been impacted in these areas. The following is a summary of recent
developments and current trail condition maps:
1) Burma Road near the junction with Water Tank Trail: New developments have
been noted, with large fissures crossing the trail in multiple areas and extending
into the surrounding landscape. Several new holes and drops have formed on
either side of the junction.
Photo 1: Large hole near the top of Water Tank Trail on Burma Road
(continued on the following page)
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Photo 2: Fissure extending across Burma Road toward Water Tank Trail
Photo 3: Fissure crossing back across Burma Road, east of Water Tank Trail
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2) Burma Road, southeast of Ishibashi and Toyon Trails: Continued activity with
significant developments in the landscape. A large fissure has widened, exposing
three or more feet of a utility pole in the area.
Photo 4: Fissure and utility pole in the landscape near Burma Road, east of Ishibashi and Toyon Trails
Photo 5: Fissure extending from utility pole back toward Burma Road, east of Ishibashi and Toyon Trails
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3) Lower Rim Trail at the junction with Burma Road: Significant developments have
occurred at the junction of Lower Rim and Burma Road Trails. Portions of the
ground have elevated and split apart, causing deep cracks and holes in the terrain.
Photos 6 and 7: Fissure, cracks, and holes at Burma Road and Lower Rim Trail
Photo 8: Fissure, cracks, and holes at Burma Road and Lower Rim Trail
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4) Garden Trail, west of the junction with Toyon Trail: Fissures continue to develop,
with a portion of the trail elevating by a foot or more in recent weeks.
Photos 9 and 10: Fissure on Garden Trail with older conditions on left, and updated conditions on right
5) Landslide Scarp Trail, near the junction with Burma Road: Large holes have
developed along the trail tread which align with a fissure that crosses the trail.
(photo on the following page)
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Photo 11: Large holes and fissure crossing Landslide Scarp Trail
6) Abalone Cove Reserve: Continued land movement has been documented in the
Reserve, most notably at the junction of Olmsted and Smuggler’s Trails and further
up at the Smuggler’s Trail viewpoint area. Access to the beach and lifeguard
stations has been severely compromised, with Olmsted Trail only available for
emergency use. There is currently no access to Sacred Cove, with rockslides
impacting Cliffside Trail and causing temporary closures.
7) Olmsted at the junction with Smuggler’s Trail: Holes and fissures in the area have
grown and reopened.
(photos on the following page)
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Photos 12 and 13: Large hole at Olmsted and Smuggler’s Trails
Photo 14: Fissure near the large hole at Olmsted and Smuggler’s Trails at Abalone Cove Reserve
8) Lay Reserve: Land movement has been observed in the Lay Reserve, most
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notably on the authorized-only vehicle access trail east of Plumtree Trail, and on
the spur trail extending north from Cinnamon Lane.
9) Authorized-only vehicle access trail: Two large fissures have developed rapidly
across the trail and in the surrounding landscape, creating drop offs, large holes,
and a graben.
Photo 15: Fissure along the authorized-only trail east of Plumtree Trail
(continued on the following page)
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Photo 16: Graben and fissures crossing the authorized-only trail into surrounding landscape east of Plumtree Trail
Photo 17: Additional photo of the fissure crossing the authorized-only trail east of Plumtree
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Exhibit 1: Map of Points of Documented Land Movement Activity.
(continued on the following page)
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Exhibit 2: Map of current trail closures in Portuguese Bend Reserve
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The City of Rancho Palos Verdes has temporarily closed several trails i n the Portuguese Bend Nature Reserve due to the
potential for hazardous conditions including, but not limited to: active landslide area, land movement, sink holes, unstable trail s
and surfaces, erosion, steep cliffs, and falling rocks.
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~po~JUGUESE BEND RESERVE Map updated May 10, 2016
Closure
-TRAll CLQSED Prtv
UNTIL FURTHER0
fl Street Parking
El Trailhead
m Vista Point
lllil Portable ~estroom
• Water Tan k
D Restricted Access
-Multiuse Trail
_., Pedestr ian Trail
-Pedestrian & Equestrian Trail
• • Pedestrian & Bike Trail
D Reserve Boundary
THEaTY OF
2.1 7 mi.
Bum,a Road Traff
RANCHO PALOS VERDES
Exhibit 3: Map of current trail closures in Abalone Cove Reserve
(continued on the following page)
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-Area Temporarily Cosed
□ Reserve Boundary
11 Parking Lot
lliil Restrooms
El Trailhead
m Vista Point
-Multiuse Trail
-•-• Pedestrian Trail
:::-=-::a Pedestrian & Bike Trail
0 0 01
Map updated May 10, 201 6
Inspiration Poi nt
TIE CITY OF
RANCHO PALOS VERDES
Exhibit 4: Map of current trail closures in Filiorum Reserve
(continued on the following page)
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Exhibit 5: Map of current trail closures in Forrestal Reserve
The City Council is being asked to receive and file a report on current Preserve trail
conditions in the Landslide Complex.
Project Activity in the Portuguese Bend Landslide Complex
To respond to the increased movement, Staff formed a working group that meets weekly
(virtually) every Wednesday at 3 p.m. and posts meeting minutes to the City’s website
under the Land Movement homepage. The purpose of the working group is to coordinate,
develop and implement actions with participating members to minimize land movement
and its impact on private property as well as public infrastructure. Although many of the
measures are the responsibility of other parties, the City is proactively supporting and
facilitating various measures. The working group is comprised of the following:
• Abalone Cove and Klondike Canyon Landslide Abatement Districts (ACLAD and
KCLAD) and their geologist;
• California Water Service (Cal Water)
• Southern California Gas Company (SoCalGas)
• Southern California Edison (SCE)
• Seaview Residential Association
• Portuguese Bend Community Association
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,/Equestnan Hitching Post
Parking
Res trp oms I IH!I
questria Restricted A bess
Trailhead ~-
Vista F'o,nt--
lHe-CJJVQ(
RANCHF) PALO
~/
• Portuguese Bend Beach Club Homeowners Association
• Palos Verdes Peninsula Land Conservancy (PVPLC)
• Los Angeles County Public Works Sanitary Sewer Maintenance (LACPW)
• Los Angeles County Sanitation Districts (LACSD)
• City of Rolling Hills
• Rolling Hills Community Association
• Area residents
• Staff and consultant program manager, geologists, and civil engineers
A summary of key recent activities is presented below:
Fissure Filling and Roadway Repairs: A combined effort including the Recreation and
Parks Department, Public Works Department, ACLAD, and KCLAD is underway to fill
as many fissures as possible (especially in advance of forecasted rain), with
geologists providing direction on priorities. Additionally, the PVPLC Volunteer Trail
Crew is assisting with maintenance to repair fissures and erosion on trails to keep as
many trails within the landslide area open as possible.
The City continues to inspect Palos Verdes Drive South (PVDS) and roadways in the
Seaview Neighborhood on a regular basis. Repairs continue to be conducted as
needed, particularly on PVDS. A review of existing signs and pavement markings, as
well as the speed limit, is planned.
Water Distribution Pipes: California Water Service (Cal Water) completed moving
water mains above ground at select locations in the area of Dauntless Drive, Exultant
Drive, and Admirable Drive as shown in Exhibit F on the following page.
(continued on the following page)
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Exhibit 6: Water mains above ground in Seaview neighborhood
In the Seaview neighborhood west of Schooner Drive, Cal Water is planning to replace
all water distribution pipes with new pipes made of flexible materials (see map on the
following page). Cal Water, in consultation with the City, is studying the possibility of
bringing additional pipes above ground in this area, if advised to do so by geologists.
A schedule for this work is under development.
(continued on the following page)
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fF«llusttafM(1UfflOfflor,/f:~notto.S1COit,kiconono,,,,m,dmotd -U~round Rr.t.10.30.23
Exhibit 7: Water mains planned to be replaced with flexible pipes in Seaview neighborhood
In the Portuguese Bend Community Association neighborhood (PBCA), Cal Water is
planning to bring the water distribution pipes on Clovetree Place above ground.
Materials have been ordered and the work is expected to be complete in four to six
weeks.
(continued on the following page)
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Exhibit 8: Water main planned to be brought above ground in Portuguese Bend Community Association
(continued on the following page)
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(For ilfustrattve purposes only: pipes not to scale, lorotton oppraKimate) -Aboi,,e-ground -Underground Rev.1.25.24
In the PBCA, Cal Water is planning to bring the water distribution pipes near Vanderlip
Drive above ground. A schedule is being developed for this work.
Exhibit 9: Water main planned to be brought above ground in Portuguese Bend Community Association
(continued on the following page)
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(For illustrative purposes only: pipes not toscole, loamon apprc»dmate) -Above-ground Rev. 1.25.24
In the PBCA, Cal Water is planning to install swing joints for the water distribution
pipes that are already above ground on Palos Verdes Drive South near Wayfarers
Chapel. Materials have been ordered and the work is expected to be complete in four
to six weeks.
Exhibit 10: Swing joints planned for existing above-ground water main
(continued on the following page)
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(For JIIIJ$tratM purpou!J only: pipes not to scale, locotiott appro«Jmat~J -Above-,:round Rev.1.2.5.24
In certain areas of the PBCA, Cal Water is planning to replace all water distribution pipes
with new pipes made of flexible materials. Cal Water, in consultation with the City, is
studying the possibility of bringing additional pipes above ground in this area, if advised
to do so by geologists. A schedule for this work is under development.
Exhibit 11: Water mains planned to be replaced with flexible pipes
(continued on the following page)
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KCLAD: Completed filling the fissure identified by the KCLAD geologist as the highest
priority fissure, because it is located at the boundary of the landslide, where water
infiltration causes greatest movement. Additionally, flexible pipe was installed to convey
water from the existing pipe under Conqueror Trail to the pipe under PVDS. KCLAD is
working to identify additional measures needed in this area as a long -term solution to
preventing water intrusion.
Exhibit 12: Priority fissure at boundary of Klondike Canyon Landslide
Exhibit 13: Priority fissure at boundary of Klondike Canyon Landslide filled and tarped
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KCLAD developed a concept plan to install a drainage pipe in the area beneath the
Seaview neighborhood and above PVDS. This is to drain a localized low area and prevent
surface water infiltration into the ground which is believed to be contributing to the ground
water table (see Exhibit 14 below). The concept plan was reviewed by the City and
comments were provided to KCLAD, which is now proceeding with design documents to
obtain construction bids.
Exhibit 14: Future drainage pipes needed for Klondike Canyon Landslide
KCLAD installed a new dewatering well south of PVDS in the Portuguese Bend Beach
Club which has brought down the water table in the area. There are now three operational
well locations which are pumping at a combined rate of 182 gallons per minute. These
wells are consistently lowering the water table depths in the area at a rate of three to four
feet per week. KCLAD is working on a repair plan for a fourth existing well which is
currently not operational. Additionally, KCLAD is considering installing additional new
wells.
ACLAD: Completed the drilling and development of the four City-funded dewatering wells
south of PVDS. Pumps are planned to be installed starting the week of February 5, 2024
(see Exhibit 15 on the following page). ACLAD is working with SCE to then provide power
to the wells. Additionally, two ACLAD-funded wells were drilled and developed north of
PVDS. Pumps for these wells are also planned to be installed starting the week of
February 5, 2024.
(continued on the following page)
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... . ~
mp Drainage Pipe Needed >~ · _ • ·
rom PV South to the head -:I . /
Ion
Exhibit 15: Locations of four City-funded wells south of Palos Verdes Drive South
Repairs to the culvert carrying Altamira Canyon under PVDS have been completed. The
repairs were made to 11 large cracks ranging from 1 to 6 inches and consisted of
removing and replacing the existing concrete liner at cracked joints and replacing it along
with installing a metal expansion joint.
Exhibit 16:Repair of culvert under Palos Verdes Drive South
ACLAD and the City are working to clear vegetation to provide access to the Kelvin
Canyon Spring and assess potential actions to drain water from the spring so that it does
not infiltrate into the ground. Additionally, the ACLAD and the City continue to hold
discussion with Los Angeles County Public Works and the Los Angeles County Flood
Control District to develop a plan for Altamira Canyon.
Finally, ACLAD continues to repair dewatering wells drain line breaks due to land
movement and perform other repairs to existing wells.
The City Council is being asked to receive and file a report on activities in the Landslide
Complex related to the emergency declaration.
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Landslide Monitoring Survey
The City conducted a landslide monitoring survey in October 2023, which found that the
accelerated rate of movement continued at a similar rate to that observed during the prior
survey (conducted in July 2023).
A special additional survey was conducted in January 2024, which found that the average
rate of movement for the three-month period from October 2023 to January 2024
increased approximately three to four times over the previous 12-month period,
depending on the location. (Attachment D)
As requested by the City Council, Staff is working to finalize the heat maps of landslide
movement previously approved by the City Council. The heat maps will be presented to
the City Council at the next landslide update on April 2, 2024.
Staff is obtaining quotes for land movement surveys using methods other than manual
surveying. These include the use of drones and/or satellites to conduct surveys.
Additional information from vendors is being obtained and Staff will present findings to
the City Council at the next landslide update on April 2, 2024.
Reimbursement Request to FEMA
The City is diligently pursuing reimbursement for costs incurred in response to the 2023
winter rains through the FEMA Public Assistance (PA) program, recognized officially as
DR-4699-CA. This is to alleviate the economic burden caused by the winter rains on the
landslide.
Earlier this year, the City submitted a reimbursement request for costs incurred
responding to the 2023 winter rains, such as debris removal and trail repairs. This request
proceeded the recent impacts associated with the accelerated land movement. T he City
was recently informed of the approved obligation of its funding requests for essential
immediate post-disaster operations. In particular, FEMA has consented to cover 75% of
the expenditures associated with the citywide debris removal, amounting to a cont ribution
of $88,077 against the accrued total cost of $117,436. Furthermore, $17,382 will be
provided towards the $23,176that was incurred as emergency protective measures. It is
important to note that while the total reimbursement does not encompass the full
spectrum of costs borne by the City, it represents a substantial portion of the then-
documented expenses eligible under the stringent guidelines of the FEMA Public
Assistance program. These figures reflect the actual, verifiable hard costs that are in strict
compliance with FEMA's regulations.
More recently, on January 29, 2023, City officials met with FEMA representatives to
explore funding options available under the federal declaration for the California Severe
Winter Storms (DR-4699-CA). A critical aspect of this process is the validation of
damages incurred by the City, ACLAD, and KCLAD as a direct consequence of the winter
storm, within the FEMA-declared Incident Period of February 21, 2023 to July 10, 2023.
Staff, in collaboration with the City Geologist, issued a coordinated memorandum
establishing a direct link between the winter storms and the accelerated land movement
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observed. Following Staff’s meeting with FEMA officials on January 29, the City has been
granted permission to submit damage identification along with its existing application for
public assistance pertaining to the immediate impacts of the winter storms. Staff is
coordinating with federal officials to provide all necessary documentation to progress in
the FEMA PA process. While this process can be extensive, Staff remains optimistic
about receiving federal funding for these damages and will continue to keep the Council
informed in this matter.
The City Council is being asked to receive and file a report on the status of reimbursement
for Landslide Complex activities in response to the California Severe Winter Storms
Disaster for the 2022-23 winter rain season).
General Information on Eminent Domain
At the December 19, 2023 meeting, residents requested the City Council consider using
eminent domain to acquire some property within the landslide that may pose a health and
safety concern. In response, the Council requested more information from the City
Attorney.
As such, in considering pursuing the possibility of acquiring certain properties through
eminent domain, that process involves numerous procedural steps specified in state law
so as to ensure compliance with the 5 th and 14th Amendments of the United States
Constitution and Article 1, Section 19(a) of the California Constitution. These steps
include the following (1) obtaining an appraisal of the subject property; (2) providing the
property owner with a pre-condemnation offer to purchase the property; (3) engage in
good faith negotiations with the property owner to try to purchase the property; (4) if the
negotiations are unsuccessful, adopting a Resolution of Necessity setting forth the
reasons it is necessary for the City to acquire the property; (5) commen cing eminent
domain litigation; and (6) obtaining a judgment transferring ownership of the property to
the City.
Depending on how cooperative a property owner is during this process, the acquisition
could require a matter of months or could take years. Under certain circumstances the
City can apply to the Court to obtain possession of the property prior to the Court entering
judgment transferring ownership to the City.
At this time, it may be considered more prudent for staff and the City Attorney to continue
communicating with property owners to ensure that any potential health and safety
concerns are addressed through the enforcement of the City’s Property Maintenance
Ordinance codified in Chapter 8 of the Rancho Palos Verdes Municipal Code. Unless
otherwise directed, staff will continue to proceed accordingly.
Emergency Preparedness Initiatives
In anticipation of potential critical situations, the City is proactively implementing a range
of strategic initiatives to bolster our emergency preparedness. This encompasses both
internal operational readiness and external collaborative measures aimed at supporting
residents potentially impacted by emergencies. Externally, the City is in the process of
finalizing a Memorandum of Understanding (MOU) with the Salvation Army at the
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Crestmont campus, and coordinating with the YMCA in Torrance to address immediate
and long-term sheltering requirements. Simultaneously, active negotiations are underway
with the Los Angeles County Office of Emergency Management (OEM) and various
commercial entities to develop and execute a comprehensive emergency housing
strategy, should the need arise. Internally, Staff is actively engaged in developing a
contingency plan to ensure continuity of government services amid potential disruptions
in utilities and infrastructure.
City Engagement with County, State and Federal Officials
The Landslide Council Subcommittee, comprised of Mayor Cruikshank and
Councilmember Bradley, and staff are in constant communication with our county, state
and federal officials and their field representatives on matters related to the landslide.
Most recently, while attending Contract Cities Legislative Tour in Sacramento earlier in
January, the Council Subcommittee and staff met in person with Senator Allen and
Assemblymember Muratsuchi and their field representatives to brief them on the latest
information related to the landslide. At this meeting, they were presented with information
from the City Geological including the maps, as well as photos of the damage sustained
throughout the Portuguese Bend Community Association, Seaview neighborhood, Palos
Verdes Nature Preserve, and Palos Verdes Drive South. With their understanding of the
severity and impacts the accelerated landslide is having on the surrounding area and
environment, the City requested the following:
• Exploring having the state declare a state of emergency.
• Providing financial and in-kind support to both ACLAD and KCLAD.
• Assisting in funding the approximately $10 million gap to implement the City’s
Portuguese Bend Landslide Remediation project.
• Assisting in expediting the implementation of the City’s Portuguese Bend
Landslide Remediation project.
Staff anticipates a response to the City’s request in the coming weeks.
Additionally, while in Sacramento, City Manager Mihranian met with State Geologist
Jeremy Lancaster to update him on the landslide. He has been following matters related
to the landslide and continues to monitor it including information presented by the City
Geologist.
On January 29, Councilmember Bradley and staff held a virtual meeting with field
representatives from Senator Padilla and Congressman Lieu’s office. They were
presented with the same information and request as our state representatives and will be
following up as well.
On February 14, staff will be meeting with Los Angeles County Public Works Department
to tour the landslide and identify resources that can be utilized. An update will be provided
in the April 4 2024 staff report, and will be provided at a subsequent Working Group
meeting.
31
Extension of the Local Emergency Declaration
On October 3, 2023, the City Council adopted Resolution No. 2023-47 declaring a local
emergency. The emergency declaration is deemed to continue to exist until its termination
is proclaimed by the City Council in accordance with law. Government Code § 8630
requires the City Council to review of the need for continuing the local emergency at least
once every 60 days until the City Council determines the local emergency within the
geographic boundaries of the Landslide Complex has been abated or mitigated to
insignificance.
At this time, the City Council is being asked to extend the local emergency declaration an
additional 60 days through April 6, 2024, which does not require a public hearing. The
state of emergency was continued by the City Council on November 14, 2023, pursuant
to Resolution No. 2023-56, and again on December 19, 2023, pursuant to Resolution No.
2023-61. If extended this evening, the Council would consider renewing the local
emergency declaration again during the next landslide update on April 2, 2024.
The City Council is being asked to adopt Resolution No. 202 4-__ thereby extending the
Declaration of Local Emergency by 60 days (Attachment A).
ADDITIONAL INFORMATION:
Water Leaks in Neighborhoods Outside the Landslide Complex
Staff is in the process of studying potential water leaks in the neighborhoods outside the
Landslide Complex that may contribute to land movement.
Non-Native Water Entering the Landslide Complex
Staff is in the process of studying non-native water entering the Landslide Complex. This
work is part of the final engineering of the Portuguese Bend Landslide Remediation
Project including updated hydrology reports for inclusion in the project’s Final
Environmental Impact Report.
A comprehensive update of the activities summarized above is also presented in
spreadsheet that is reviewed by the Working Group at the weekly meetings. The
spreadsheet is presented in Attachment E.
Public Notification
The public will be made aware of tonight’s agenda item through the City’s listserv, as wel l
as an update at the January 31 Working Group meeting. Any public comments received
after the transmittal of this staff report will be provided to the City Council as late
correspondence. The public can submit comments via email to cc@rpvca.gov.
CONCLUSION:
Staff recommends the City Council receive and file an update on current conditions in the
Landslide Complex; current conditions of Palos Verdes Nature Preserve trails in the
Landslide Complex; activities to reduce landslide movement by varies entities; the status
of reimbursement for landslide activities in response to the California Severe Winter
32
Storms Disaster (for the 2022-23 wet season); and engagement with state and federal
officials. Staff also recommends the City Council extend the local emergency declaration
for an additional 60 days.
ALTERNATIVES:
In addition to Staff’s discussed option, the following alternative actions are available for
the City Council’s consideration:
1. Take no action and simply receive and file this report.
2. Take such other action as the Council deems appropriate.
33
RESOLUTION NO. 2024-__
A RESOLUTION OF THE CITY COUNCIL OF THE CITY OF
RANCHO PALOS VERDES, CALIFORNIA, CONTINUING
THE LOCAL EMERGENCY DECLARATION BY 60 DAYS
UNTIL APRIL 6, 2024, AS ESTABLISHED BY
RESOLUTION NO. 2023-47 ADOPTED ON OCTOBER 3,
2023
WHEREAS, on October 3, 2023, the City Council of the City of Rancho Palos
Verdes adopted Resolution No. 2023 -47, declaring a local state of emergency because
of the alarming increase of land movement in the Greater Portuguese Bend Landslide
Complex, as depicted in Resolution No. 2023-47 Exhibits “A” and “B”. Resolution No.
2023-47, and the exhibits thereto, is incorporated by reference.
WHEREAS, on October 3, 2023, the City Council by a 4/5 vote also adopted
Interim Urgency Ordinance No. 674U, establishing a moratorium on all construction in the
Landslide Complex.
WHEREAS, on November 14, 2023, the City Council by a 4/5 vote adopted
Resolution No. 2023-56, continuing the state of emergency for an additional 60 days.
WHEREAS, on December 19, 2023, the City Council by a 4/5 vote adopted
Resolution No. 2023-61, continuing the state of emergency for an additional 60 days.
WHEREAS, the state of emergency is deemed to continue to exist until its
termination is proclaimed by the City Council in accordance with law. Government Code
§ 8630 requires the City Council to review of the need for continuing the local emergency
at least once every 60 days until the City Council determines the local emergency within
the geographic boundaries of the Landslide Complex has been abated or mitigated to
insignificance.
WHEREAS, after consideration of all facts reasonably available the City Council
now desires to extend the declaration of a state of local emergency within the Landslide
Complex.
NOW, THEREFORE, THE CITY COUNCIL OF THE CITY OF RANCHO PALOS
VERDES, CALIFORNIA, HEREBY FINDS, DETERMINES, AND RESOLVES AS
FOLLOWS:
SECTION 1. Recitals. The City Council hereby determines that the above
recitals are true and correct and incorporates the same as the findings of the City Council.
SECTION 2. Proclamation of Emergency. The City Council finds, pursuant
to RPVMC Chapter 2.24 and Government Code §§ 8630 and 8680.9, there exists, and
continues to exist, an actual condition of peril to the safety of persons and property exiting
within the Greater Portuguese Bend Landslide, comprised of the Portuguese Bend
Landslide, the Abalone Cove Landslide, and the Klondike Canyon Landslide ), as depicted
in Exhibits “A” and “B” of Resolution No. 2023-47, and hereby proclaims that a state of
local emergency continues to exist throughout the same.
A-1
Resolution No. 2024-__
Page 2 of 3
SECTION 3. Authority Granted. It is further proclaimed and ordered that
during the existence of said local emergency, the powers, authority, functions and duties
of the Disaster Council, Director, and the City’s emergency services organizations shall
be those prescribed by State Law, City ordinances, Resolution No. 2023-47 and any other
applicable resolutions, and approved plans of the City in order to mitigate the effects of
the local emergency.
SECTION 4. Immunity Invoked. To the maximum extent permitted by law, and
pursuant to Government Code § 866, the City Council hereby invokes the immunity
afforded to the City of Rancho Palos Verds in adopting and implementing the declaration
of local emergency within the Landslide Complex
SECTION 5. Duration. The local emergency shall be deemed to continue to
exist until its termination is proclaimed by the City Council in accordance with law.
SECTION 6. Continuing Declaration. Government Code § 8630 requires the
City Council to review of the need for continuing the local emergency at least once every
60 days until the City Council determines the local emergency within Landslide Complex
has been abated or mitigated to insignificance.
SECTION 7. Severability. If any subsection, sentence, clause, phrase, or word
of this Resolution or any application of it to any person, structure, gathering, or
circumstance is held to be invalid or unconstitutional by a decision of a court of competent
jurisdiction, then such decision will not affect the validity of the remaining portions or
applications of this Resolution.
SECTION 8. Effectiveness. This Resolution shall take effect immediately. A
copy of the Proclamation and this Resolution shall be forwarded to the California
Emergency Management Agency. The City Clerk shall certify to the passage and
adoption of this resolution..
PASSED, APPROVED AND ADOPTED on this 6th day of February, 2024.
________________________________
John Cruikshank, Mayor
ATTEST:
________________________________
Teresa Takaoka, City Clerk
STATE OF CALIFORNIA )
COUNTY OF LOS ANGELES ) ss
CITY OF RANCHO PALOS VERDES )
I, Teresa Takaoka, City Clerk of the City of Rancho Palos Verdes, hereby certify that
the above Resolution No. 2024-__ was duly and regularly passed and adopted by the
said City Council at a regular meeting thereof held on February 6, 2024.
A-2
Resolution No. 2024-__
Page 3 of 3
___________________________
Teresa Takaoka, City Clerk
A-3
B-1
I
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RESOLUTION NO. 2023-61
A RESOLUTION OF THE CITY COUNCIL OF THE CITY OF
RANCHO PALOS VERDES, CALIFORNIA, CONTINUING
THE LOCAL EMERGENCY DECLARATION BY 60 DA VS
UNTIL FEBRUARY 10 AS ESTABLISHED BY
RESOLUTION NO. 2023-47 ADOPTED ON OCTOBER 3,
2023 AND EXTENDED BY RESOLUTION NO. 2023-56
ADOPTED ON NOVEMBER 14, 2023
WHEREAS, on October 3, 2023, the City Council of the City of Rancho Palos
Verdes adopted Resolution No. 2023-47, declaring a local state of emergency because
of the alarming increase of land movement in the Greater Portuguese Bend Landslide
Complex, as depicted in Resolution No. 2023-47 Exhibits "A" and "B". Resolution No.
2023-47, and the exhibits thereto, is incorporated by reference,
WHEREAS, on October 3, 2023, the City Council by a 4/5 vote also adopted
Interim Urgency Ordinance No. 647U, establishing a moratorium on all construction in the
Landslide Complex,
WHEREAS, on November 14, 2023, the City Council by a 4/5 vote adopte.d Interim
Urgency Ordinance No. 657U, extending the moratorium for an additional 10 months and
15 days, and adopted Resolution No. 2023-56, continuing the state of emergency for an
additional 60 days,
WHEREAS, the state of emergency is deemed to continue to exist until its
termination is proclaimed by the City Council in accordance with law. Government Code
§ 8630 requires the City Council to review of the need for continuing the local emergency
at least once every 60 days until the City Council determines the local emergency within
the geographic boundaries of the Landslide Complex has been abated or mitigated to
insignificance, and
WHEREAS, after consideration of all facts reasonably available the City Council
now desires to extend the declaration of a state of local emergency within the Landslide
Complex.
NOW, THEREFORE, THE CITY COUNCIL OF THE CITY OF RANCHO PALOS
VERDES, CALIFORNIA, HEREBY FINDS, DETERMINES, AND RESOLVES AS
FOLLOWS:
Section 1. Recitals. The City Council hereby determines that the above recitals
are true and correct and incorporates the same as the findings of the City Council.
Section 2. Proclamation of Emergency. The City Council finds, pursuant to
RPVMC Chapter 2.24 and Government Code §§ 8630 and 8680.9, there exists, and
continues to exist, an actual condition of peril to the safety of persons and property exiting
within the Greater Portuguese Bend Landslide, comprised of the Portuguese Bend
01203 0023/943568 1
B-2
Landslide, the Abalone Cove Landslide, and the Klondike Canyon Landslide), as depicted
in Exhibits "A" and "B" of Resolution No. 2023-47, and hereby proclaims that a state of
local emergency continues to exist throughout the same.
Section 3. Authority Granted. It is, further proclaimed and ordered that during
the existence of said local emergency, the powers, authority, functions and duties of the
Disaster Council, Director, and the City's emergency services organizations shall be
those prescribed by State Law, City ordinances, Resolution No. 2023-47 and any other
applicable resolutions, and approved plans of the City in order to mitigate the effects of
the local emergency.
Section 4. Immunity Invoked. To the maximum extent permitted by law, and
pursuant to Government Code § 866, the City Council hereby invokes the immunity
afforded to the City of Rancho Palos Verds in adopting and implementing the declaration
of local emergency within the Landslide Complex
Section 5. Duration. The local emergency .shall be deemed to continue to exist
until its termination is proclaimed by the City Council in accordance with law.
Section 6. Continuing Declaration. Government Code § 8630 requires the
City Council to review of the need for continuing the local emergency at least once every
60 days until the City Council determines the local emergency within Landslide Complex
has been abated or mitigated to insignificance.
Section 7. Severability. If any subsection, sentence, clause, phrase, or word of
this Resolution or any application of it to any person, structure, gathering, or circumstance
is held to be invalid or unconstitutional by a decision of a court of competent jurisdiction,
then such decision will not affect the validity of the remaining portions or applications of
this Resolution.
Section 8. Effectiveness. This Resolution shall take effect immediately. A copy
of the Proclamation and this Resolution shall be forwarded to the California Emergency
Management Agency. The City Clerk •Shall certify to the passage and adoption of this
resolution.
PASSED, APPROVED AND ADOPTED on this 19th day of December, 2023.
ATTEST:
~~'--i=ty,._C__;;le""'"r-k _____ _
01203 0023/943568 1
Resolution No. 2023-61
Page 2 of 3
I
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B-3
I
I
I
STATE OF CALIFORNIA )
COUNTY OF LOS ANGELES ) ss
CITY OF RANCHO PALOS VERDES )
I, Teresa Takaoka, City Clerk of the City of Rancho Palos Verdes, hereby certify that
the above Resolution No. 2023-61 was duly and regularly passed and adopted by the
said City Council at a regular meeting thereof held on December 19, 2023.
0120.3 0023/943568 1
~C>-. ityClerk
Resolution No 2023-61
Page 3 of 3
0 250 500 1000
(feet)
PONY TRAIL
PORTUGUESE
BEND
LANDSLIDE
FLYING
TRIANGLE
LANDSLIDE
KLONDIKE
CANYON
LANDSLIDE
ABALONE
COVE
LANDSLIDE
ABALONE
COVE
PORTUGUESE
POINT
INSPIRATION
POINT
SACRED
COVE
BURMA ROAD
NARCISSA DRIVE
SWEETBAY
ROAD
PALOS VERDES DRIVE SOUTH
CREST
ROAD
EXPLANATION
Limits of the Ancient Portuguese Bend Landslide Complex
Limits of Historically Mapped Landslides
2023 Landslide Mapping
ANCIENT PORTUGUESE BEND
LANDSLIDE COMPLEX
SEAVIEW TRACT
COTTON,S HIRES AND ASSOCIATES, INC.
CONSULTING ENGINEERS AND GEOLOGISTS
RANCHO PALOS VERDES, CALIFORNIA
SC5067
POS
MP 1"=500'
FIGURE NO.
PROJECT NO.
DATE January 2024
SCALE
APPROVED BY
GEO/ENG BY
LANDSLIDE MAPPING UPDATE 1/27/2024
2
Abalone Cove, Portuguese Bend, Klondike Canyon
Hillshade basemap produced from publicly available LiDAR:
"2015 - 2016 LARIAC Lidar DEM: Los Angeles Region, CA"
C-1
z
0
;:::i. ::,
Portuguese Bend Land Movement Monitoring Survey
October 2023 – January 2024 Survey Report
for the
City of Rancho Palos Verdes
prepared by
McGee Surveying Consulting
October 30, 2023, Revised January 30, 2024
Portuguese Bend is typically monitored for land movement on a tri-annual basis with an initial survey of all
current monitoring points at the beginning of the rainy season in the fall of each year followed by two
subsequent partial winter and spring monitoring surveys. The survey report is published following the spring
survey; however, at the City’s request a special survey of all current points was conducted in January 2024 and
reported here as an Addendum. Movements are reported for the average date of the survey noted below and
listed on Pages 5 & 8.
Initial Fall Survey No. M38 - October 10, 2023
Early Winter Special Request Survey No. M39 - January 13, 2024
SPREADSHEET ATTACHMENT: “PB MOVEMENT DATA POSTING (Revised 01/22/24) 2007-Jan2024.xlsx”
OVERVIEW: GNSS MONITORING NETWORK (M38)
McGee Surveying Consulting
(MSC) performed the 2023-2024
land movement monitoring surveys
at Portuguese Bend. The surveys
were planned, coordinated, and
executed by Michael McGee,
PLS3945 of MSC who is
responsible for the field surveys,
processing observations, network
adjustments, analysis, and reports.
For a general history, details and
procedures utilized in this survey
but not re-stated here, see the
“Portuguese Bend Land Movement
2020-2021 Monitoring Survey”
report dated October 5, 2021,
Revised and published May 11,
2022. See also prior reports.
This Initial October 10, 2023
Survey determined the precise positions of 79 monitoring and control points. PVE3RP and other CSRC CGPS
stations were used to support and reference the survey network and verify the recovery of the reference frame.
This survey included two new points set in July 2023 for the special request July 2023 M37 Monitoring Survey
in Klondike Canyon (Seaside), and 10 new points set in September 2023. Point KC02 is expected to be
destroyed in the spring and a new point “KC24” was set nearby during the October survey. Point AB20 was
destroyed sometime after the October 10, 2023 survey and AB21, a nearby point, was recovered from the 2007
survey and substituted for AB20 which facilitated continuous monitoring at this location. The movements of
new points are reported, for the first time, in the January 13, 2024 monitoring survey and are included in this
Report as an Addendum. The October 2023 and January 2024 coordinates and the October 2022 to October
2023 and the October 2023 to January 2024 movements are listed in the attached spreadsheet note above.
D-1
RPV Portuguese Bend: Monitoring Survey
McGEE SURVEYING CONSULTING
5290 Overpass Road, Ste#107, Santa Barbara, CA 93111
Page 2 of 11
PROJECT DATUMS - REFERENCE FRAME
The horizontal and vertical positions of the monitoring points are based on the North American Datum of 1983
(NAD83) Epoch 2007.00 and the North American Vertical Datum of 1988 (NAVD 88) reference frames.
Orthometric heights (NAVD88 Elevations) are based on measured ellipsoid heights combined with the NGS
Geoid03 model and referenced to NGS Benchmarks. Although more current geoid models are available,
Geoid03 is retained to maintain relative height differences over time as explained in said May 2022 Report. The
latitudes and longitudes determined by GNSS measurements are projected onto NAD83 California State Plane
Coordinates Zone 5 in US Survey Feet.
A valid recovery of the reference frame is essential to accurately measure and assess the actual movements of
individual points relative to the greater peninsula. The method for recovering the monitoring survey reference
frame was modified in 2019 to improve the efficiency and simplify the processing and analysis of the
monitoring surveys. Since 2007, Point AB02 (at the south end of Portuguese Point) has proven to be stable
relative to PVE3 which is a California Spatial Reference Center (CSRC) Continuously Operated GPS Station
(CGPS) at City Hall. The previous procedure was modified by fixing point AB02 instead of PVE3 and checking
to PVE3RP (a PK Nail set on the concrete base of PVE3 as a reference mark to PVE3). The proven positions
relative to PVE3 are listed below.
Pt# Latitude Longitude NAVD88 Ht Source)
AB02 33-44-13.84878 118-22-26.19243 116.47 ft 2007 - October 2018 position
PVE3RP 33-44-35.74239 118-24-15.27451 346.88 ft Average of 5 years referencing to PVE3
Comparing the positions of AB02 on Portuguese Point with PVE3RP at City Hall and other CSRC CGPS
Stations provides a redundant verification that the reference frame is stable and successfully recovered for each
monitoring survey.
The rate of movement (velocities) of the land masses have increased over the past five years compared to the
previous 12-year average. See “Assessment of Movements & Accelerations” addressed on Page 10 & 11.
Notwithstanding the 2019 monitoring process noted in the above paragraph, the processing of observations was
necessarily modified for this fall survey because of the higher velocities as follows.
The October 2023 observations were processed as follows. The Base Station AB73 was occupied over a six-day
period and was found to have moved about 0.016 feet per day similar to other monitoring points in the area. To
determine accurate positions and therefore precision movements it was necessary to determine a daily position
of AB73. This was accomplished by processing the static data collected each day at AB73 with static data
downloaded from the CSRC for CGPS stations PVE3 and PVHS. PVE3 is and has always been the basic
constraint for the monitoring survey’s reference frame. PVHS was used to verify the stability of PVE3.
Subsequently positions of AB73 were computed for each day referenced to PVE3. The identity for processing
the daily observations of AB73 and related RTK measurements was to assign to AB73 the identity of AB731,
AB732, AB733, AB734 & AB735 for days 1 through 5 occurring on October 8, 9, 10, 11 & 13.
AB61 and AB20 have previously served as suitable GNSS Base Stations for referencing measured positions of
the monitoring points. AB61 is no longer accessed due to its environmental sensitivity and lack of security.
Presently AB73, located on the US Pony Club property is utilized as the Base Station. Access was obtained
unilaterally by MSC from the Pony Club manager. MSC has exclusive permission to enter the property which is
confirmed prior to each survey entry with the understanding that strict driving protocols are observed. This
privilege at this time does not extend to others. Point AB73 was not a planned monitoring point but given the
increased rates of movement, it fills in a gap between AB20 and AB50 and moves consistent with AB20 slowly
encroaching on AB50. Note. AB50 and AB73 are on the south and north sides of PVDS.
The Fall 2023 Survey is the 38th Monitoring Survey. For data management purposes the point names are
prefixed with a sequential monitoring number to distinguish subsequent surveys. For example, on the 16 th
monitoring survey, AB02 was named M16AB02 where M16 indicates the sequence number since the first
Monitoring Survey “M01” in September 2007. The prefix is stripped in these Reports.
D-2
McGEE SURVEYING CONSULTING
5290 Overpass Road, Ste#107, Santa Barbara, CA 93111
Page 3 of 11
October 2023 GNSS Survey Network: Monitoring Points
D-3
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McGEE SURVEYING CONSULTING
5290 Overpass Road, Ste#107, Santa Barbara, CA 93111
Page 4 of 11
GNSS Survey Parameters, Metadata & Equipment
Date of Annual Initial Survey: M38 – October 10, 2023 (mean date) between 0800-1700 PDST (+7 hrs for UTC).
Constellations: GPS (31 Satellites), Russian GLONASS (23 Satellites), Galileo (23 Satellites) and Beidue (40 Satellites).
Observables (Carrier Waves): GPS (L1, L2, L5), GLONASS (L1, L2), Beidue (L1, L2); & Galileo (4 Carrier Waves)
Data Epoch Rate - 0.2 seconds (20HZ) at the GS18 Rover; 1 second at the GS18 Base
Satellites: 20-40; GDOP: < 2; Elevation Mask: 0° at the Rover and Base Station
Ephemeris: Broadcast for RTK vectors.
Weather: Mostly calm clear skies, temperature 65-75° F, no significant weather.
Space Weather: Boulder K Index 1-3 averaging 2 (gauges ionospheric activity on a scale of 0-9; less than 6 preferred)
Equipment: GNSS Base Receiver Unit No. M11, Operator: M. McGee, PLS; Occupied Base Station
Receiver Make & Model: Leica GS18 with integrated Antenna; Mount: Tripod & Tribrach
GNSS Rover Receiver Unit No. M10, Operator: M. McGee, PLS
Receiver Make & Model: Leica GS18T with integrated Antenna; Mount: Fixed Height Pole #4
Processing & Adjustments: Leica Infinity v4.0 and "Starnet-PRO” version 11.0.6 Software
Prior to 2019, geodetic grade GNSS receivers collected static satellite signal data for post processing. The
instrumentation was upgraded in 2020 to a Leica GS18 Base with a GS18T RTK Rover operating in real-time
with an FM radio system which utilizes the latest technology to deliver increased productivity and precision of
point positions. The GS18 receiver incorporates an Inertial Measurement Unit and tracks four Global Navigation
Satellite Systems (GNSS): GPS, GLONASS, Galileo and Beidue Satellites. The differences in two measured
vectors are acceptable if they fall within 0.03 feet (1 cm) horizontally; otherwise, additional measurements are
usually obtained with some exceptions. Experience has shown the independent measurements generally agree on
average about 0.02 feet.
ADJUSTMENTS & ANALYSIS
Network Adjustment: A minimally constrained adjustment is utilized to develop NAD83 (2007) 2007.00
Epoch Zone 5 State Plane Coordinates and NAVD88 Heights of the monitoring points. The NAVD88
orthometric heights (elevations) are determined by combining the measured ellipsoid heights with the Geoid 03
Model. Previously, Point AB02 was fixed, and the stability verified relative to PVE3RP which is 1.5 to 3 miles
westerly and outside the influence of the land movements. AB02 is expected to be stable and unaffected by the
land movement; however, due to the substantially increased rates of movement resulting in dynamically
differential movements the process was modified as noted above to assure accurate positions. This was
accomplished by computing daily positions on the Base Station AB73 (AB731, AB732, AB733, AB734,
AB735) relative to the reference frame fixed at PVE3 noted above. Listed here are the differences.
Differences in Feet
ID dN dE dZ_
PVE3 0.000 0.000 Fixed Horizontal, CGPS Station at City Hall
AB02 -0.022 -0.008 0.000 Fixed Elevation & Horizontal Check
PVE3RP -0.010 -0.003 -0.055 Closure Check from PVE3 to AB73 to PVE3RP at City Hall
PVHS -0.035 0.003 Horizontal Check on CGPS Station 2 Miles North of PB
Comments: Fixing the CGPS station PVE3 (fixed constraint since 2007) finds the differences at PVHS,
PVE3RP or AB02 are insignificant measurement noise. Given that AB02, PVE3RP, PVE3 and PVHS are in
good relative agreement, the survey reference frame is deemed stable and successfully recovered from which
local land movements were determined.
ACCURACY STATEMENTS
Vector Residuals: In this Initial Survey, the two-dimensional vector residuals averaged 0.012 feet and the
absolute value of the vertical residuals averaged 0.02 feet as listed below. The vector residuals are based on a
network adjustment of independent point positions.
Vector Lengths(ft) Two Dimensional Residuals Absolute Vertical Residuals
Vary Average Average Std.Dev. Maximum Average Std.Dev. _ Range
131-16391 3792 0.012 0.006 0.029 0.02 0.02 -0.03 to +0.08
D-4
McGEE SURVEYING CONSULTING
5290 Overpass Road, Ste#107, Santa Barbara, CA 93111
Page 5 of 11
Movement Accuracy: A point is deemed to have moved if, at the 95% level of confidence the horizontal
movement (signal) of a point between two epochs is greater than the 95% Error (noise). Based on multiple
independent occupations, the horizontal (2D) movements reported between October 2022 (M34) and October
2023 (M38) statistically attained a relative average accuracy of 0.014 feet at the 95% Level of Confidence with
a Standard Deviation of 0.004 feet and a Range of 0.01 to 0.03 feet. See the attached file “PB MOVEMENT
DATA POSTING (Revised 012224) 2007-Jan2024.xlsx” for movements and coordinates.
Table of 2D & Vertical Movements for 12.0 Months October 10, 2022 (M34) & October 10, 2023 (M38)
Listed below are the movement Azimuths (directions clockwise from North) in degrees, the two-dimensional
horizontal movements, and the vertical (elevation) changes during the period in US Survey Feet. See the
attached spreadsheet “PB MOVEMENT DATA POSTING (Revised 012224) 2007-Jan2024.xlsx”. Note: The
horizontal measured movement confidence is estimated at +/-0.02’ (1/4”); therefore, movements of less than
0.03’ are statistically indeterminate. The estimated vertical measured movement confidence is +/-0.05’.
* = Control Point for Recovery of the Reference Frame.
Point
ID
Azimuth° Horizontal
Movement
Vertical
Movement
Point
ID
Azimuth° Horizontal
Movement
Vertical
Movement
AB01 244 0.06 0.0 KC02 196 1.99 0.1
AB02 201 0.02 0.0 KC05 219 0.88 -0.1
AB04 223 4.80 -0.6 KC06 253 1.34 -0.5
AB05 231 3.51 -0.6 KC07 256 0.02 0.0
AB13 198 2.48 -0.6 KC13 193 0.70 0.1
AB16 191 1.20 0.0 KC14 259 0.12 -0.1
AB17 187 0.06 0.0 KC15 233 1.36 -0.4
AB20 199 3.06 -0.1 KC16 251 0.03 0.0
AB24 198 2.68 0.0 KC17 222 1.24 -0.3
AB50 236 1.99 0.2 KC18 202 2.86 -0.3
AB51 202 2.05 -0.2 PB04 203 3.62 -0.3
AB53 192 2.75 -0.4 PB06 200 3.35 -0.3
AB57 169 2.37 -0.7 PB07 201 3.85 -0.1
AB58 183 2.22 -0.4 PB08 201 3.61 0.0
AB59 186 3.17 -0.8 PB09 198 3.49 -0.1
AB60 204 2.69 -0.3 PB12 200 4.67 -0.3
AB62 203 3.73 -0.4 PB13 201 3.83 0.1
AB63 207 3.58 -0.9 PB18 187 3.51 -0.5
AB64 155 0.35 -0.1 PB20 199 4.23 -0.4
AB65 167 1.49 -0.3 PB21 195 3.93 -0.6
AB66 196 2.29 -0.5 PB26 192 3.94 -0.4
AB67 180 1.12 -0.2 PB27 195 4.18 -0.8
AB68 193 2.03 -0.6 PB29 200 4.02 -1.0
AB70 203 2.97 -0.1 PB54 196 3.39 -0.2
AB71 158 1.76 -0.6 PB55 199 3.86 -0.8
AB73 203 3.00 -0.3 PB59 199 4.11 -0.6
CR07 171 1.87 -1.6 PB67 194 5.93 -0.8
CR50 225 0.11 -0.1 PB68 202 3.49 -0.1
CR51 223 0.08 0.0 PB69 202 3.91 -0.3
CR53 231 0.21 0.0 PB70 207 3.58 -0.8
FT06 192 3.66 -1.7 PB71 198 3.65 -0.4
FT08 257 0.06 0.0 UB02 189 4.17 0.3
FT09 271 0.08 -0.1 *PVE3RP 195 0.01 0.0
D-5
McGEE SURVEYING CONSULTING
5290 Overpass Road, Ste#107, Santa Barbara, CA 93111
Page 6 of 11
October 10, 2022 to October 10, 2023 Movement Distances (Feet) & Directions as Indicated
Note: Distances are exaggerated x 100 for viewing
Enlargement (PVDS) Enlargement (Seaview)
D-6
McGEE SURVEYING CONSULTING
5290 Overpass Road, Ste#107, Santa Barbara, CA 93111
Page 7 of 11
MONITORING POINT MONUMENT NOTES & STATUS
See the May 2022 Survey Report for prior monument notes.
2023: 16 points added to the monitoring program as listed below. AB20 destroyed after October 2023 Survey
MONITORING POINT MONUMENT DESCRIPTIONS
All other Point Descriptions are listed in prior Reports.
California State Plane Coordinates Zone 5 in the NAD83 (2007) Epoch 2007.00 and NAVD88 Datums are listed in the
attached spreadsheet file “PB MOVEMENT DATA POSTING….”.
Point Brief Description
Points added in July and October 2023
AB21 2" Punched GIP in “Cable Box”, Replaced AB20 after Oct. 2023
PB72 2" mag nail & washer in conc. in 2"x 24" GIP Collared in Concrete
PB73 2" mag nail & washer in conc. in 2"x 24" GIP Collared in Concrete
PB74 2" mag nail & washer in conc. in 2"x 24" GIP Collared in Concrete
PB75 2" mag nail & washer in conc. in 2"x 24" GIP Collared in Concrete
CR54 2" mag nail & washer in conc. in 2"x 24" GIP Collared in Concrete
CW05 Found ½” x 48” Punched Rebar in Concrete Collar set June 2022 for Calwater
CW06 Found ½” x 48” Punched Rebar in Concrete Collar set June 2022 for Calwater
CW07 Found ½” x 48” Punched Rebar in Concrete Collar set June 2022 for Calwater
CW08 Found 2” Mag nail in Concrete Base of 3’ Bollard set June 2022 for Calwater
KC19 2” Mag Nail Drilled in a Concrete Curb on South side of Dauntless Dr.
KC20 2” Mag Nail Drilled in a Concrete Curb on West side of Excelsior Dr.
KC21 2" mag nail & washer in conc. in 2"x 24" GIP Collared in Concrete
KC22 2" mag nail & washer in conc. in 2"x 24" GIP Collared in Concrete
KC23 2” Mag Nail Drilled in a Concrete Curb on South side of Admirable Dr.
KC24 2” Mag Nail Drilled in the Southwest Corner of a Concrete Vault for Drop Inlet to
Replace KC02
Addendum Report
Portuguese Bend Land Movement Monitoring Survey
Full Monitoring Survey No. M39 - January 13, 2024
A special Portuguese Bend Monitoring Surveys (M39) was requested by the City in January 2024. The average
date of the survey is January 13, 2024, 3.1 months after the October 10, 2023 Initial Monitoring for 2023-
2024.The survey included 79 monitoring points representing the full network. A central base station (usually
occupying AB73) was not feasible due to the excessive rate of land movement and reliance was made on the
remote Smartnet RTN Stations which resulted in a lesser accuracy. For this survey, this was not an issue since
the signal (measured movement) was much greater than the noise of the measurements expected to be less than
0.05’. A typical minimally constrained adjustment as described above for M38 was processed to develop
NAD83 (2007) Epoch 2007.00 CA Zone 5 State Plane Coordinates and NAVD88 Heights.
The horizontal (2D) vector residuals averaged 0.03 feet with a Standard Deviation of 0.02 feet. The absolute
value of the vertical residuals averaged 0.04 feet with a Standard Deviation of 0.04 feet. At the 95% Level of
Confidence, estimated accuracy of the horizontal (2D) movements is 0.05 feet.
The adjustment fixed point PVE3RP and checked to other points expected to be and found stable. Differences
from the known fixed positions to the measured positions in this survey are listed here with their north, east and
vertical components in feet.
Differences in Feet
ID dN dE dZ_
PVE3RP 0.00 0.00 0.00 Fixed Reference at City Hall
AB02 0.01 0.01 -0.05 Check Point at Portuguese Point
M39RP01 -0.01 0.01 0.05 Check Point at Trump Golf Course
The successful recovery of a stable reference frame (coordinate system) confirmed.
D-7
McGEE SURVEYING CONSULTING
5290 Overpass Road, Ste#107, Santa Barbara, CA 93111
Page 8 of 11
Table of 2D & Vertical Movements for 3.1 Months October 10, 2023 (M38) & January 13, 2024 (M39)
Listed below are the movement Azimuths (directions clockwise from North) in degrees, the two-dimensional
horizontal movements, and the vertical (elevation) changes during the period in US Survey Feet. See the
attached spreadsheet “PB MOVEMENT DATA POSTING (Revised 012224) 2007-Jan2024.xlsx”. Note: The
horizontal measured movement confidence is estimated at +/-0.04’ (1/2”); therefore, indicated movements of
less than 0.05’ are statistically indeterminate. The estimated vertical measured movement confidence is +/-0.08’.
* = Control Point for Recovery of the Reference Frame.
Point
ID
Azimuth° Horizontal
Movement
Vertical
Movement
Point
ID
Azimuth° Horizontal
Movement
Vertical
Movement
AB01 23 0.01 -0.1 KC13 188 0.44 0.0
AB02 27 0.01 0.0 KC14 262 0.03 0.0
AB04 223 3.52 -0.4 KC15 233 0.91 -0.3
AB05 230 2.76 -0.4 KC16 88 0.02 0.0
AB13 195 2.44 -0.4 KC17 218 0.80 -0.3
AB16 190 1.71 -0.1 KC18 200 2.03 -0.3
AB17 118 0.03 0.0 KC19 269 0.74 -0.2
AB21 197 2.80 0.1 KC20 277 0.67 -0.2
AB24 195 2.71 0.0 KC21 92 0.04 0.0
AB50 234 1.63 0.0 KC22 255 1.07 -0.5
AB51 200 2.08 0.0 KC23 237 0.57 -0.3
AB53 190 2.79 -0.3 KC24 199 1.22 -0.1
AB57 170 1.77 -0.5 PB04 202 2.63 0.0
AB58 179 2.50 -0.4 PB06 200 2.43 -0.2
AB59 185 3.11 -0.8 PB07 201 2.62 0.0
AB60 204 2.54 -0.2 PB08 201 2.60 0.0
AB62 203 2.62 -0.3 PB09 197 2.40 -0.1
AB63 207 2.79 -0.8 PB12 199 3.16 -0.3
AB64 128 0.19 0.0 PB13 199 2.51 0.0
AB65 167 1.98 -0.6 PB18 185 2.94 -0.5
AB66 193 2.41 -0.4 PB20 198 2.82 -0.3
AB67 181 1.56 -0.3 PB21 194 2.66 -0.5
AB68 191 2.28 -0.4 PB26 193 2.65 -0.2
AB70 200 2.85 -0.2 PB27 196 2.75 -0.5
AB71 158 1.35 -0.4 PB29 200 2.60 -0.7
AB73 202 2.52 -0.1 PB54 192 2.90 0.0
CR07 164 1.47 -1.2 PB55 198 2.88 -0.5
CR50 37 0.04 0.0 PB59 200 2.86 -0.3
CR51 107 0.04 0.2 PB67 195 3.32 -0.3
CR53 180 0.02 0.1 PB68 202 2.57 0.0
CR54 185 2.81 -0.9 PB69 201 2.82 -0.1
CW05 185 0.02 0.1 PB70 204 2.72 -0.3
CW06 59 0.05 0.1 PB71 197 2.90 0.0
FT06 191 2.48 -1.1 PB72 206 2.73 0.3
FT09 148 0.02 0.2 PB73 190 2.49 -0.4
KC02 193 1.30 0.0 PB74 193 3.08 -0.4
KC05 215 0.55 0.0 PB75 193 2.89 -0.1
KC06 256 0.94 -0.4 UB02 189 2.74 0.2
KC07 135 0.01 0.0 *PVE3RP 0 0 0.1
D-8
McGEE SURVEYING CONSULTING
5290 Overpass Road, Ste#107, Santa Barbara, CA 93111
Page 9 of 11
October 10, 2023 to January 13, 2024 Movement Distances (Feet) & Directions as Indicated
Note: Distances are exaggerated x 100 for viewing
Enlargement (PVDS) Enlargement (Seaview )
D-9
Movements Oct. 10, 2023 to Jan. 13, 2024
McGEE SURVEYING CONSULTING
5290 Overpass Road, Ste#107, Santa Barbara, CA 93111
Page 10 of 11
ASSESSMENT of MOVEMENT VELOCITIES & ACCELERATIONS 2014 to 2024
Others have performed monitoring surveys of the Portuguese Bend land movement between 1994 and 2006.
McGee Surveying Consulting assumed responsibility and defensibility for the Portuguese Bend Monitoring
Program in 2007. The annual measured movements between 2007 and 2018 were fairly small and stable as
shown below by the averages and maximums of a sampling of points for the 2014-2018 period. The fall 2019
monitoring survey found the annual rate of movements (velocities) increased (accelerated) about 4 to 6 times
and remained stable for the next four years through 2022. A “year” here is defined as the 12-month period
beginning with the rainy season on October 1st.
Annual Average Movements in Feet, Maximum Movements & Change in the Average of a Sample of Points
2014-2018(4 Yrs) 2018-2022(4 Yrs) Change in
ID Average Max. Average Max.__ _ Average
AB20 0.09 0.20 0.48 0.54 +5X
AB53 0.07 0.18 0.43 0.49 +6X
AB68 0.05 0.11 0.31 0.32 +6X
CR07 0.06 0.13 0.30 0.32 +5X
KC06 0.04 0.09 0.16 0.22 +4X
PB55 0.89 1.31 0.89 1.23 +1X (No Change)
In the following twelve months between October 2022 and October 2023, the annual rate of movements were
found to have again accelerated. The table below shows a sample of points within Abalone Cove (AB),
Klondike Canyon (KC) and Portuguese Bend (PB). The left half of the table compares the annual movements
and rate of movements per month for the October 2021 to October 2022 with the October 2022 to October 2023
period. The annual rate of movement for the sample averages in each slide increased about 6x for AB, 8x for KC
and 5x for PB.
In the same 12-month period between October 2022 and October 2023, accelerations were noted in the first
seven months over the previous year and again in the last five months over the previous seven months as shown
in the right half of the table below. The average rate of movement in each slide for these samples in the first
seven months October 2022 through April 2023 increased about 3x for AB, 4x for KC and 2x for PB over the
previous 12-month period of October 2021 to October 2022. The average rate of movements in each slide for
the samples in the last five months May 2023 to October 2023 increased 4x for AB, 4x for KC and 3x for PB
over the previous seven months.
October 2021 to October 2023 Movements & Rates per Month (Feet) M32 > M34 (12 Mo.) M34 > M38 (12 Mo.) M34 > M36 (7 Mo.) M36 > M38 (5 Mo.)
Point Oct '21 > Oct '22 Oct '22 > Oct '23 Oct '22 > May '23 May '22 > Oct '23 Movement Rate/Mo Movement Rate/Mo Movement Rate/Mo Movement Rate/Mo
AB20 0.51 0.042 3.06 0.255 0.84 0.119 2.22 0.444
AB53 0.49 0.041 2.75 0.229 0.74 0.105 2.01 0.403
AB58 0.41 0.034 2.22 0.185 0.60 0.085 1.62 0.325
AB60 0.45 0.038 2.69 0.224 0.80 0.114 1.90 0.379
AB67 0.18 0.015 1.12 0.094 0.32 0.046 0.80 0.160
AB68 0.32 0.027 2.03 0.169 0.54 0.077 1.49 0.299
AB70 0.48 0.040 2.97 0.248 0.84 0.120 2.14 0.427
CR07 0.31 0.026 1.87 0.156 0.44 0.062 1.43 0.287
Av Move 0.39 0.033 2.34 0.195 0.64 0.091 1.70 0.340
KC06 0.16 0.014 1.34 0.111 0.33 0.047 1.01 0.202
KC13 0.09 0.007 0.70 0.058 0.19 0.027 0.51 0.102
KC17 0.14 0.012 1.24 0.104 0.31 0.044 0.93 0.187
Av Move 0.13 0.011 1.09 0.091 0.27 0.039 0.82 0.163
PB55 0.80 0.067 3.86 0.321 1.06 0.151 2.80 0.560
PB70 0.72 0.060 3.58 0.299 1.14 0.163 2.44 0.488
Av Move 0.76 0.063 3.72 0.310 1.10 0.157 2.62 0.524
D-10
McGEE SURVEYING CONSULTING
5290 Overpass Road, Ste#107, Santa Barbara, CA 93111
Page 11 of 11
Movement & Rate of Movement per Month
In the last 3-month period October 10, 2023 to January 13, 2024,
accelerations were noted again relative to the previous 12-months.
The average rate of movements in each slide for the last 3-months
for these samples increased about 4x for AB, 3x for KC and 3x for
PB over the previous 12-month period of October 2022 to October
2023.
RECOMMENDATION
Continuity in the methods, precision and reporting of the monitoring surveys are necessary to evaluating results
relative to and consistent with prior 2007-2024 monitoring survey campaigns. Monitoring survey campaigns
require the services of an independent GNSS/Geodetic expert to evaluate and validate results to assure program
integrity and defensibility.
Maintaining a clearing of foliage in a 10’ radius around monitoring points and trimming nearby trees and brush
above eye height is necessary to assure a clear view of the sky for tracking satellites. Satellites, although unseen,
can appear anywhere in the sky above the horizon and the radio signals passing through foliage degrade the
required survey accuracy and productivity. Presently, Points AB04, AB13, AB17, AB24, AB51, AB58, AB66,
PB18, PB54, CR51 and CR53 have foliage obstructions limiting sky (satellite) visibility and require clearing prior
to the next survey.
SURVEYOR'S STATEMENT
This Fall October 2023 and special request for the early Winter January
2024 Survey and Report on the procedures, criteria, and results of the
City of Rancho Palos Verdes Portuguese Bend Land Movement
Monitoring Surveys was performed by me on October 30, 2023 and
updated January 30, 2024 at the request of Ramzi Awwad, City Engineer
of the City of Rancho Palos Verdes.
Point M38 > M39 (3.1 Mo.) Oct. 10, 2023
to Jan. 13, 2024 Movement Rate/Mo
AB20 2.80 0.903
AB53 2.79 0.900
AB58 2.50 0.806
AB60 2.54 0.819
AB67 1.56 0.503
AB68 2.28 0.735
AB70 2.85 0.919
CR07 1.47 0.474
Average 2.35 0.758
KC06 0.94 0.303
KC13 0.44 0.142
KC17 0.80 0.258
Average 0.73 0.236
PB55 2.88 0.929
PB70 2.72 0.877
Average 2.80 0.903
D-11
m_~4~
Michae l R. McGee , PLS3945
January 30, 2024 Comprehensive Update of Recent Landslide Complex Activities
Activity Responsible
Entity
Current Status Estimated
Completion
Portuguese Bend
Landslide EIR and
Final Engineering
City • A draft Basis of Design Memorandum has been
submitted to the City and an initial review is being
conducted.
October 2024
PVDS at Peppertree
Drainage
City • City submitted responses to request for
information from FEMA and now awaiting FEMA
grant approval.
TBD
GPS Surveying of
Landslide
Movement
City • A special January GPS survey and report was
completed.
• The survey showed that land movement
accelerated between Oct 2023 and Jan 2024 at a
rate of 3 to 4 times when compared to Oct 2022 to
Oct 2023.
Ongoing
PVDS Roadway
Repairs
City • Inspections continue on a regular basis and repairs
are scheduled as needed; currently approximately
every few weeks.
Ongoing
Crack-Filling in
Seaview
Neighborhood
City (RPV) • The City has continued to fill cracks, especially in
advance of expected rainfall.
• As new cracks occur or existing cracks change, the
City will need to continue this effort.
• The City encourages residents to continue to
report cracks by emailing
landmovement@rpvca.gov.
Ongoing
Road Repairs in the
Portuguese Bend
Community
Portuguese
Bend
Community
Association
• Repairs to Peppertree Dr are complete.
• Repairs to Clovetree have been scheduled for the
week of 1/26/2024. Work will consist of cutting
out the asphalt, regrading, then applying new
asphalt.
• Bids are being solicited for repairs on
Pomegranate, which has a deep hole and 3-4"
rising.
Ongoing
Guardrail to Protect
Above-Ground
Sewer Trunk Lines
on Palos Verdes
Drive South
LACSD • Los Angeles County Sanitation District is ordering
materials and scheduling construction
Feb 2024
Underground Sewer
Lines in Seaview
Neighborhood
LACPW: Mains
Homeowners:
Laterals
• Continuing sewer inspections will occur as
needed.
Ongoing
Sewer Lines in
Portuguese Bend
Community
City • Completed camera inspection of underground
sewer lines in areas where major movement has
been observed and found no unknown breaks.
• Breaks at several locations continue to occur and
City is responding to repair and sanitize.
Ongoing
E-1
CITYO ANCHO PALOS VERDES
Activity Responsible
Entity
Current Status Estimated
Completion
Leaning SCE Power
Poles Repairs
Southern
California
Edison (SCE)
• Leaning and damaged poles and mounted
equipment are being scheduled in conjunction
with Frontier Communications as some
equipment is co-located.
Ongoing
Gas Lines in
Portuguese Bend
Community
SoCalGas • Some gas lines require above-ground placement
and SoCal Gas has identified priority areas.
• SoCal Gas is preparing plans and developing a
schedule.
• SoCal Gas will immediately repaired fractured or
damaged lines.
TBD
Water Mains in
Seaview
Neighborhood
Cal Water • Water lines at select locations recommended by
geologists have been moved above ground.
• Broader-scale water line replacements with new
materials are being planned.
TBD
Water Mains in
Portuguese Bend
Community
Association
Cal Water • Water lines at select locations have been designed
to be moved above ground and materials have
been ordered. Delivery of materials is expected in
early February and construction completion is
expected in March.
• Additional locations are being considered for
water mains to be brought above ground.
• Broader-scale water line replacements with new
materials are being planned.
TBD
KCLAD Dewatering
Wells
KCLAD • One additional dewatering well has been installed
south of PVDS, bringing the total to three
operating dewatering wells.
• Dewatering wells are currently pumping at a rate
of 182 GPM and the water table continues to go
down since the installation of the additional
dewatering well.
• Repairs are being planned for the non-functioning
dewatering well with broken casing.
• Additional dewatering wells are being considered.
Ongoing
Klondike Canyon KCLAD & City • Major fissure across Klondike Canyon has been
filled and tarped.
• Additional measures to assure proper drainage
upstream and downstream are being designed by
KCLAD and will be reviewed by the City upon
completion.
Ongoing
Klondike Canyon
Culvert and Pipe
KCLAD & City • The culvert outlet at the beach is experiencing
wave action and erosion. KCLAD is performing
regular cleaning/clearing.
Ongoing
Lower Seaview/
PVDS at Klondike
Canyon Drainage
KCLAD & City • KCLAD developed concept plan for draining
localized low point south of Seaview and north of
PVDS.
• City reviewed and provided suggestions.
TBD
E-2
CITYO ANCHO PALOS VERDES
Activity Responsible
Entity
Current Status Estimated
Completion
• KCLAD is preparing engineering plans to solicit
construction bids.
ACLAD Dewatering
Wells
ACLAD • Four major drain line breaks have been repaired.
• Two new wells have been drilled and developed.
Working on installing drain lines and power.
• Currently pumping 130k GPD.
Ongoing
Dewatering Wells
South of PVDS
ACLAD & City • Four dewatering wells have been drilled and
developed. Drain lines and electric lines to two
wells have been installed, others are being
scheduled.
• Pump installation is scheduled for the week of
February 5.
• Provision of power through SCE is being
scheduled.
Feb 2024
PVDS Culvert Repair ACLAD & City • Repairs to cracks have been completed. Complete
Altamira Canyon
Lining
ACLAD, RPV,
and LACPW
• Conducted a meeting and field tour of Altamira
Canyon with LACPW on 1/10/2024. Discussions
are ongoing for next steps.
• Investigation into Kelvin Canyon Spring is starting
with plan to clear vegetation to allow access so
that stream bed can be restored.
TBD
E-3
CITYO ANCHO PALOS VERDES