CC SR 20250121 01 -Landslide Update Jan 21 2025
CITY COUNCIL MEETING DATE: 01/21/2025
AGENDA REPORT AGENDA HEADING: Regular Business
AGENDA TITLE:
Consideration and possible action to fund the installation of additional deep dewatering
wells in the Greater Portuguese Bend-Ancient Altamira Landslide Complex.
RECOMMENDED COUNCIL ACTION:
(1) Receive and file a proposed conceptual comprehensive landslide remediation
plan;
(2) Receive and file an update on City expenditures for emergency protective and
stabilization measures in response to the acceleration of the Greater Portuguese
Bend-Ancient Altamira Landslide Complex;
(3) Based on available funds, determine whether additional deep dewatering wells
should be installed and if so, how many; and
(4) Identify which Fiscal Year 2024-25 Capital Improvement Program (CIP) projects
should be deferred to fund the additional deep dewatering wells and their operation
and maintenance for three months.
FISCAL IMPACT: Thus far, the Portuguese Bend landslide emergency response is
projected to reach approximately $44.7 million as of October 2022 through the fiscal year
ending June 30, 2025. The $44.7 million is funded through various sources, including the
General Fund, CIP Fund, ARPA, Supervisor Hahn’s Social Program Grant, and Metro
Funds.
Of the $44.7 million, approximately $33 million is funded in FY 2024-25 (See Funding
Sources on the next page), of which $12.5 million, or 38%, comes from the CIP Fund and
General Fund reserves:
• $23.9 million for emergency response, boreholes and deep dewatering wells.
This amount also includes the $9.6 million approved on May 7, 2024 and $6.1
million on October 1, 2024.
• $4 million for emergency stabilization measures for additional deep dewatering
wells approved on October 1, 2024.
• $4 million for winterization approved on October 1, 2024.
• $1.1 million for maintenance costs for DDWs until March 31, 2025.
Adopted Budgeted in June 2024: $4,840,000
Revised Budget with continuing appropriations from original hydraugers project,
emergency response, and mitigation efforts: $33,000,000
Additional Appropriation: Based on City Council’s recommendation tonight
Account Number(s): Current funding sources: VR
1
CITYOF RANCHO PALOS VERDES
ORIGINATED BY: Ramzi Awwad, Director of Public Works
Vina Ramos, Director of Finance VR
REVIEWED BY: same as below
APPROVED BY: Ara Mihranian, AICP, City Manager
ATTACHED SUPPORTING DOCUMENTS:
A. Conceptual Comprehensive Landslide Remediation Plan (Page A-1)
B. Landslide GPS Survey Report - January 7, 2025 (Page B-1)
C. Displacement Rate Contour Map up to January 7, 2025 (Page C-1)
D. Horizontal Movement Velocity Plots up to January 7, 2025 (Page D-1)
E. SCE’s Re-energization Letter to Customers (Page E-1)
F. Public Comments including Seaview HOA Letter of Support for Additional
Deep Dewatering Wells (Page F-1)
BACKGROUND:
On August 20, 2024, the City Council authorized the emergency installation of immediate
stabilization and protection measures consisting of deep dewatering wells (DDWs) in
response to exponential acceleration of the Greater Portuguese Bend Landslide
Complex, sometimes called the Ancient Altamira Landslide Complex (Landslide
Complex) as a result of historic rainfall during the 2022-23 and 2023-24 rainy seasons.
The City Council appropriated a total of an additional $9,635,000 for this emergency work
at that meeting.
On October 1, 2024, the City Council authorized an expansion of the DDW program to
the Abalone Cove area and appropriated an additional $4 million for this work.
Additionally, the City Council authorized a winterization program on City-owned property
in the Landslide Complex without waiving the Abalone Cove Landslide Hazard Abatement
District’s (ACLAD) and Klondike Canyon Landslide Hazard Abatement District’s (KCLAD)
responsibilities as identified in their plans of control; and appropriated an additional $4
million for this work.
Funding Sources FY 2024-25 TOTAL
In Millions
CIP Fund 11.2
CIP Fund (Reserves) 5.0
General Fund 3.4
General Fund (Reserves) 6.4
ARPA Fund 3.4
Metro Funds 1.4
Sup. Hahn's Social Program Grant 2.2
TOTAL $33.0
2
Al-'
On December 17, 2024, the City Council appropriated and additional $1.1 million for
operations and maintenance of the DDW program through March 31, 2025. Additionally,
the City Council directed Staff to return with a list of projects in the current CIP that could
potentially be deferred to make additional funds available for implementation of new
DDWs. Further, the City Council asked Staff to provide a full-build out plan so that the
City Council may understand what future funding needs may exist to remediate the
Landslide Complex including installation and indefinite annual operation and
maintenance costs.
DISCUSSION:
Funded Emergency Stabilization and Protection Measures
Deep Dewatering Wells
Installation of the initial DDWs funded by the City Council as part of the emergency
stabilization and protection measures is complete. Figure 1 shows the location of the
current DDWs along with associated test boreholes and monitoring wells.
Figure 1: Deep Dewatering Wells
3
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s
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a --Publ•""""· _.,,_lcs c:ounty Public Wofb, City of Rancho 5er'Ylce Lay'l!r Credits: Los ~~
1,000 2,000
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,,. ,,.
DDW-5 DDW-4 ,,.
DDW-1 ,,.
DDW-2
OOW-3
,,..,errTin.e ERING WELL LOCATIONS EXHIBIT 2 -DEWAT
MAP LEGEHO
Oewa teri ng Wells
• Demmmlssloned
• Completed
Table 1 shows the installation dates and dewatering statistics of the 11 DDWs.
Table 1: DDW Current Water Extraction Rates as of January 14, 2025
DDW
No. Date Operational
Current Approximate
Water Extraction Rate
(Gallons Per Minute)
Total Water Extraction to Date
Acre-Ft Million Gallons
1 9/13/2024 85 46 15
2 9/17/2024 105 49 16
3 9/21/2024 105 45 14.7
4 9/21/2024 75 33 10.8
5 9/25/2024 115 (re-drilled 12/27/24) 43 14
6 9/28/2024 85 (re-drilled 12/29/24) 36 11.7
7 10/15/2024 20 7 2.3
8 10/17/2024 40 27 8.8
9 10/25/2024 Decommissioned 11/07/24 2 0.7
9A 11/16/2024 65 (re-drilled 12/30/24) 15 4.9
10 10/24/2024 120 41 13.6
11 12/03/2024 5 1 0.3
Totals 820 345 112.4
As of the date of publication of this staff report, the total combined water extraction rate
of DDWs 1 through 11 is currently approximately 820 gallons per minute or approximately
1.15 million gallons per day. Since the start of the DDW program, over 112 million gallons,
or approximately 345 acre-feet, of water have been extracted from certain locations of the
toe of Landslide Complex.
Although wells are surviving land movement for longer than expected, the project team
expects DDWs to shear and need to be re-drilled due to land movement. Following is the
status of the DDWs with respect to shearing:
• DDW 9 sheared on November 11, 2024, and because it was not a very productive
well, based on the advice of GLA, it was relocated and re-named DDW 9A.
• DDW 5 sheared and was re-drilled on December 17, 2024.
• DDW 6 sheared and was re-drilled on December 19, 2024.
• DDW 9A sheared and was re-drilled on December 30, 2024.
• DDW 7 is pinched at the deeper slide plane but continues to extract water at close
to the normal rate. The project geologist, Geo-Logic and Associates (GLA) is not
recommending re-drilling DDW 7 because it has not been a high producing well.
Depending on funding availability for other DDWs, DDW7 may be relocated or
decommissioned.
• DDW 8 is pinched at the deeper slide plane but continues to extract water at
approximately ½ the normal rate. This well is the next re-drill priority as part of the
DDW maintenance program.
• DDW 11 is a low producing well; however, due the limited availability of accessible
locations for DDWs in its vicinity, GLA recommends continuing to operate this well
and re-drilling it when it shears.
To assess the effectiveness of the DDW program, a survey of a select sample of surface
monitoring points at the toe of the landslide is being conducted on an approximately
weekly basis using Global Positioning System (GPS) surveying. To establish a baseline
rate of movement, a survey of the select sample of surface monitoring points was
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conducted on September 4, 2024. Figure 2 presents the results of the weekly GPS
surveying as of January 7, 2025. Attachments B, C, and D provide the GPS survey,
displacement contour maps, and horizontal movement velocity plots from the January 7,
2025 monthly full survey.
Figure 2: GPS Survey Movement Rates of Sample Points: Sept 4, 2024 to Jan. 7, 2025(in. / week)
GPS survey data of land movement in the vicinity of the DDWs near the Portuguese Bend
Beach Club (PBBC) shows that horizontal displacement of the ground surface in the
Seaview Neighborhood and the PBBC continues to be below instrument error and in
random directions since October 13, 2024. Additionally, the amount of vertical movement
for those areas has been below instrument error since October 29, 2024. GLA, and the
project peer reviewer, Cotton Shires & Associates (CSA), have therefore concluded that
due to several months of dry weather (<0.1 inch of rainfall since June 1, 2024), DDWs 1 -
6, and dewatering efforts by KCLAD, there continues to be no measurable land movement
in the Seaview and PBBC neighborhoods.
The rate of movement in the vicinity of DDWs 7 and 8, which have been in operation for
nearly three months, is approximately 20%-30% less than the rate of movement further
west towards Abalone Cove where DDWs have been in operation for a shorter period of
time.
Extraction of water from DDWs 9A, 10, and 11 does appear to directly correlate with
confirmed increased reduction in ground movement of nearby surface survey monuments
within the toe region of the ACL; which are moving at a slower rate than monuments
further up in the middle and upper portions of the ACL. Movement rates have been erratic
(both decreases and increases), and inconsistent during the short time of water extraction
thus far. Comparison of movement survey data over the last few months showed that
rates of movement were reduced approximately 10% with the initiation of these wells in
mid-October, and then a relatively constant rate thereafter through the beginning of
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CJ Survey Points within
close proximity of
Dewatering Wells
Deep
Dewatering
Well
Numbers in boxes represent
percent decrease in surface
movement for the stated
t ime period . Red = rate on
9/4/24 and Black= rate on
1/7/25 in inc hes per week
January. The effectiveness of DDWs 9A, 10, and 11 can be better evaluated after they
are monitored for a few more months.
In summary, the average movement velocity for the Landslide Complex is variable and
ranges from 100% reduction in the KCLAD area, 60% to 90% reduction in the PBL, down
to approximately 45% in the ACLAD area, since September 4, 2024.
Winterization
Implementation of the winterization program funded by the City Council as part of the
emergency stabilization and protection measures is substantially complete. Shaping,
fissure filling, and installation of pond liners at Altamira, Kelvin, Portuguese, and Klondike
Canyons is complete. Winterization of the graben at the intersection of Dauntless Drive
and Exultant Drive, Exultant Drive, Admirable Drive, and Palos Verdes Drive South
(PVDS) Service Road is complete. The scope and limits of work is generally based on
recommendations by GLA, with field-fitting where appropriate. Figure 3 below shows the
primary locations of winterization work.
Some winterization work remains to be completed, particularly repairs to damaged pipes
along PVDS in the area of Seaview. Some drainage work is excluded from the
winterization work as part of the emergency stabilization and protection measures
because it is much more substantial and requires significant funding. This includes
Ishibashi and Paintbrush Canyons, as well as drainage pipes under PVDS.
Figure 3: Winterization Program
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1 • Alt ml ra Canyon 3 • Klond ike C nyon
• Canyon g a ng & hner at base
• F,11 ng lissures and grabens n n arby e 4 • Seav aw Community
• Stre t re-grading re-surfacing : Exuttant & Adm able Dm,e
2 • Portugu , I hlbashl, Pa intbrush Canyons • Exultant Dauntless protectlv measures
Staff has been regularly evaluating the condition of areas which have been winterized.
Continued land movement in the Abalone Cove Landslide area has resulted in fissures
re-opening and grabens continuing to expand in and around parts of the Altamira Canyon
area over the past few weeks. This has compromised some of the winterization work and
additional funds will eventually be needed to repair these emergency winterized areas.
Staff estimates that the cost of these repairs through the winter season will require
approximately $500,000 in additional funding for the current fiscal year (ending 30 June
2025).
Conceptual Comprehensive Landslide Remediation Plan (Full Build-Out)
The DDW program has demonstrated that the knowledge and technology exist to stop or
drastically retard the Landslide Complex movement, given the necessary resources. In
response to the City Council’s directive at the December 17 , 2024 meeting, GLA
developed a full build-out concept plan that would remediate movement within the
Landslide Complex to negligible amounts (Attachment A) if unlimited resources were
available. The purpose of such a plan is to give the City Council and public the full picture
of the scope and scale, as well as the big -picture cost estimate of what it would take to
slow movement in the Landslide Complex to a negligible rate. This also helps the City
Council understand the impact of a few more DDWs in relation to the full build-out.
The conceptual plan in its current form shows approximate locations of remediation
elements based on currently available subsurface information and is unconstrained with
respect to resources, land ownership, and responsible agency. It is noted that some
elements of the conceptual plan are the responsibility of ACLAD and KCLAD.
GLA recommends installation of these additional remediation elements in addition to
dewatering efforts and drainage improvements currently in place by KCLAD and ACLAD
(although some ACLAD dewatering wells are recommended to be re-installed as deep
dewatering wells).
The build-out conceptual plan approaches remediation of the Landslide Complex
wholistically but still needs to be coordinated with KCLAD and ACLAD as those agencies ’
geologists may provide input that results in modifications to the plan. Additionally, the
concept plan is still being peer reviewed by the CSA. The concept plan is intended to
provide the scale of what a full-build out condition may look like rather than a detailed
final plan.
The conceptual plan will continue to evolve and may need to be modified to relocate some
elements from their current identified locations to other locations where property owners
are amenable to providing easements. The concept plan may also be modified based on
new subsurface information that becomes known during the design development or
construction process. Additionally, depending on the outcome of a critical source
hydrology and hydraulics study, some elements could be modified or eliminated if it is
more advantageous or cost effective to develop off-site solutions.
It is not practical to design, construct, operate, and maintain all elements of the conceptual
plan at one time; therefore, phasing the plan is recommended. The conceptual plan is
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based on unconstrained resources, but it is noted that in addition to installing additional
measures, continuing to maintain and operate existing DDWs , as well as other
infrastructure is major cost component for the City. The total cost of the conceptual plan
is estimated to be up to approximately $146 million which could change when factoring
escalation, inflation, unforeseen expenses, etc. The cost components and phasing are
outlined below and detailed further in the following sections. Note that with the exception
of parts of Phase 1, there is an additional annual operations and maintenance cost that
would have to be budgeted in the CIP indefinitely to continue on-going dewatering efforts.
• Operations and Maintenance of Existing DDWs = $5.5M
• Roadway and Sanitary Sewer Repairs = $6M
• Phase 0 (Fissure Filling) = minimum of $1M annually
• Phase 1 (current phase and includes the existing 11 DDWs plus 12 DDWs along
PVDS/Toe of Slide)
o DDWs 14-16 = $3.75M w/operations and maintenance through June 30,
2025
o DDWs 12-13 plus ACLAD WW18 = $4.5M w/operations and maintenance
through June 30, 2025
o DDWs 17-22 = $8M excluding operations and maintenance
• Phase 2 (19 Upper DDWs) = $26M
• Phase 3 (5 Hydraugers at Toe of Slide) = $25M
• Phase 4 (4 Upper Interceptor Hydraugers) = $20M
• Phase 5 (Long-Term Drainage Improvements)
o PBL Canyons and Pipes = $16M
o Altamira Canyon = $18M
o Klondike Canyon = $6M
Operations and Maintenance
The annual operations and maintenance cost for the current DDWs 1-11 is estimated to
be approximately $0.5 million per DDW, or $5.5 million/year for the 11 current DDWs.
This cost could potentially be lower if there is less shearing and fewer DDWs are required
to be re-drilled. Additionally, if SCE-provided electric power is available in place of
generators, the annual operations and maintenance cost is estimated to be approximately
$4.5M; however, there would be an up-front one-time installation cost of approximately
$5 million for electric infrastructure and equipment to power the current DDW. This up-
front cost is because the DDWs are not in an area where distribution lines exist, therefore,
there would be a cost to extend distribution lines and associated infrastructure to the
DDWs. This cost is typically borne by the customer (City).
Increasing the number of DDWs by three adds approximately $1.5 million to the annual
operations and maintenance cost. This cost also could be lower if there is less shearing
and fewer re-drilling instances. Additionally, if electric power is available in place of
generators and fuel; the annual operations and maintenance cos t is estimated to be
approximately $1 million for three DDWs; however, there would an up-front installation
cost of approximately $1.75 million for electric infrastructure and equipment for three
additional DDWs.
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Winterization efforts completed to date will also require annual maintenance in advance
of the rainy season at an added cost. Although certain elements of winterization,
particularly where movement has stopped or been significantly slowed, are expected to
endure for multiple rainy seasons; other measures will require significant annual
maintenance. Costs for annual maintenance is contingent on the degree of repairs.
Roadway and Sanitary Sewer Repairs
Repairs associated with the Abalone Cove Sanitary Sewer System; which is owned,
operated, and maintained by the City have totaled approximately $1.75 million in FY
2024-25 so far (and approximately $900,000 in FY23-24). These costs are paid from the
CIP emergency fund for landslide.
The repairs typically consist of replacing segments of underground pipe that have been
damaged from land movement and are necessary to continue to provide sewer service
to certain structures. Although the existing materials are typically replaced with materials
more resilient to land movement, repairs continue to be needed. The cost of repairs has
been greater than anticipated and additional budget may be necessary to continue to
make repairs to maintain sewer service to certain structures.
Additionally, repair costs associated with PVDS, which is owned, operated, and
maintained by the City have totaled $1.2 million in FY 2024-25 (and approximately $2
million in FY23-24). These costs are paid from the CIP emergency fund for landslide and
Proposition C funds.
Fissure Filling (Phase 0 – Additional Emergency / Ongoing Immediate Measures)
One of the highest priority elements of the conceptual plan is filling all major fissures,
particularly in high priority areas at landslide boundaries (which has so far been
completed for this winter season as part of the emergency winterization measures).
Fissure filling locations are expected to continue to change with continued land movement
until the movement is significantly reduced.
Based on current conditions, the estimated cost of the fissure filling is approximately $1
million in 2025 dollars, excluding inflation. At the current rates of movement, fissure filling
will be needed on an annual basis in advance of the rainy season. The cost of fissure
filling could change depending on the extent of additional remediation measures and
resultant impact on movement rates.
Deep Dewatering Well Along PVDS/Toe (Phase 1 – Current Phase)
With unconstrained resources, the next priority of the plan is completing Phase 1 by
installing 12 additional DDWs (in addition to the existing 11 DDWs, for a total array of 23)
along the toe of the Landslide Complex. DDWs along the toe of the Landslide Complex
are the second highest priority mitigation measure because they will improve the
likelihood of buttressing the remainder of the landslide area further up-slope. These 12
additional DDWs could be installed in a staged manner, with minimum groupings of three
DDWs at a time. GLA recommends prioritizing areas of known high artesian pressure,
which facilitates landslide movement, and areas where nearby wells have been very
productive. The estimated cost to install, operate, and maintain the 12 DDW groups
through June 30, 2025 is $16.25 million and a breakdown is provided below (in 2025
9
dollars excluding inflation for wells constructed beyond the next several months ). GLA
recommends the priority and grouping shown below.
• DDWs 14-16 = $3.75 million
• DDWs 12-13 plus ACLAD WW18 = $4.5 million
• DDWs 17-22 = $8 million excluding operations and maintenance
GLA identified DDWs 14-16 as the highest priority and recommend that they be installed
first followed by the other groups if resources are available.
Deep Dewatering Wells at Upper Slide (Phase 2)
Following completion of the proposed DDWs along the toe of the Landslide Complex,
installing 19 additional upper DDWs would be the next highest priority. The locations of
these DDWs are proposed based on where the highest artesian pressures were
encountered with test boreholes and where shallow ACLAD wells have been most
productive. The estimated cost to install these wells is provided below (in 2025 dollars
excluding inflation and operations and maintenance ).
• 19 additional Upper DDWs = $26 million
Hydraugers at Toe (Phase 3)
Hydraugers are proposed to follow completion of the proposed DDWs because the
movement rate needs to be down to a level where hydraugers don’t easily shear, which
should be accomplished with an expanded DDW program. A series of Hydraugers arrays
along the toe are a higher priority than upper hydraugers because they improve the
likelihood of additional buttressing of the remainder of the landslide area further up-slope.
The estimated cost to install these hydraugers is provided below (in 2025 dollars
excluding inflation and operations and maintenance).
• 5 Toe Hydraugers = $25 million
Upper Interceptor Hydraugers (Phase 4)
Four upper hydraugers are proposed to intercept subsurface water flow coming down
towards the body of the slide from off-site regional sources, and as such, should follow
water extraction measures which reduce land movement and create a condition for all
measures to be even more durable.
The Source Water/Hydrology and Hydraulics Study that the City is commissioning may
identify off-site measures that could prevent the arrival of certain sources of water, which
would mean that some of the upper interceptor hydraugers could be reduced or
eliminated if a more effective or cost-efficient off-site measure is identified. The estimated
cost to install these hydraugers is provided below (in 2025 dollars excluding inflation and
operations and maintenance).
• 4 Upper Hydraugers = $20 million
Long-Term Drainage Improvements (Phase 5)
Following the installation of water extraction measures, as noted above, and significant
remediation of slide movement, long-term drainage improvements is the next priority. The
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drainage improvements generally consist of grading, canyon lining, and drainage pipe
installation. This includes Altamira Canyon and its tributaries, Portuguese, Ishibashi,
Paintbrush, and Klondike Canyons. The long-term drainage improvements are
recommended to follow water extraction measures because they will slow down the slide
whereas drainage improvements protect against future impact (recharging the water
table). Additionally, water extraction measures increase the durability and life span of
long-term drainage improvements as well as reduce maintenance costs. Based on the
results of water extraction efforts, drainage improvements could be mixed in with other
elements of the project at earlier stages if movement is slowing to the point that they
would be durable.
The Source Water/Hydrology and Hydraulics Study that the City is commissioning may
identify off-site measures that could prevent the arrival of certain sources of water, which
would mean that some of the long-term drainage improvements could be reduced or
eliminated if a more effective or cost-efficient off-site measure is identified. The estimated
cost to install long term drainage improvements is provided below (in 2025 dollars
excluding inflation and maintenance).
• Long-Term Drainage Improvements = $40 million
CONTINUED ON THE NEXT PAGE
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Cost Summary
Table 2: Concept Plan Full Build-Out Cost Estimate
Component Installat
ion
Annual
Operations &
Maintenance
w/Generators
Operations & Maintenance
w/Electricity
Existing
DDWs 1-11 $13.65M $5.5M $4.5M with $5.0M one-time installation
Winterization $4M TBD N/A
Other (PVDS, Sewer
Repairs, etc.)
N/A $6M+ N/A
Phase 0
Fissure Filling $1M TBD N/A
Phase 1
DDWs 14-16 $3.75M $1.5M $1.2M with 1.75M one-time installation
DDWs 12&13 & ACLAD
WW-18
$4.5M $1.5M $1.2M with 1M one-time installation
DDWs 17-22 $8M $3.0M $2.4M with 2.5M one-time installation
Phase 2
Upper DDWs $26M TBD TBD
Phase 3
Toe Hydraugers $25M TBD TBD
Phase 4
Upper/Interceptor
Hydraugers
$20M TBD TBD
Phase 5
PBL Canyons and Pipes $16M TBD N/A
Altamira Canyon $18M TBD N/A
Klondike Canyon $6M TBD N/A
TOTAL $146
M
TBD TBD
Financial Report
FY 2023-24 and FY 2024-25 Year-End Update
General Fund
As part of the annual financial closing process, staff has submitted a year-end report in a
separate staff report tonight to summarize the draft financial results for revenues,
expenditures, and transfers in FY 2023-24. These figures are preliminary and will be
finalized once the audit is completed in February. Staff do not anticipate any material
changes.
In summary, the FY 2023-24 year-end draft results for the General Fund reflect revenues
of $40.4 million and expenditures of approximately $3 6.5 million, including all transfers.
The draft operating favorable variance is $3.9 million , which increases the unallocated
fund balance for FY 2023-24. These figures are important to report as the results impact
the beginning balance available for FY 2024-25.
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In the financial reports presented to the City Council from October to December 2024 for
landslide expenditures, staff has already accounted for $3.6 million of the $3.9 million
increase in the unallocated fund balance. On October 1, 2024, the City Council approved
to allocate $6.4 million using a portion of the unallocated fund balance for the landslide
emergency response and mitigation efforts.
Overall, as of January 2025 (Table 3), based on the draft results in FY 2023-24 and the
approved budget revisions in the FY 2024-25 budget, the estimated unallocated fund
balance in the General Fund is $13.2 million. This balance reflects an increase of
approximately $0.3 million compared to $12.9 million reported to the City Council between
October and December 2024.
Table 3. FY 2024-25 Estimated General Fund Balance
Based on the latest information, Chart 1 on the following page presents the revised 10-
Year Financial Model. These figures are for illustrative purposes only, providing the City
Council with an outlook of the General Fund over the next 10 years. As shown in Chart
1, FY 2024-25 expenditures are estimated to exceed revenues, mainly due to additional
transfers of approximately $8.9 million from the unallocated fund balance to support
capital projects and landslide emergency response and mitigation efforts .
Given the set of assumptions that staff uses annually for the model, the remaining years
show a narrow gap between revenues and expenditures, which staff continues to monitor.
Additionally, these figures will be updated during the budget process, which takes place
from April to June 2025. As part of this process, the City Council will adopt a final model
following a series of budget workshops.
As shown above (Table 3), the FY 2024-25 unallocated fund balance is estimated to end
the year at $13.2 million. Based on the current assumptions of revenues, expenditures,
and transfers for the next 10 years, the average unallocated fund balance is $10 million
(Chart 2) on the next page.
General Fund (in millions) FY 2024-25
Adopted
FY 2024-25
Revised Budget
Beginning Fund Balance 37.5 37.2 - 0%
Add: Revenues 39.7 42.5 2.9 7.2%
Add: Transfers-In 0.3 0.3 - 0.0%
Total Revenues 39.9 42.8 2.9 6.7%
Less: Expenditures (35.5) (37.7) 2.3 6.3%
Less: Transfers to CIP (TOT) (3.9) (3.9) 0.0 1.2%
Less: Other Transfers-Out (0.3) (0.3) - 0.0%
Total Expenditures (39.6) (41.9) 2.3 5.8%
PROJECTED Ending Fund Balance 06/30/2025 37.8 38.1 0.6 1%
City Council Restricted Fund Balance
Less: Additional Transfers - CIP Ladera (PY Surplus) (0.9) (0.9) - 0.0%
Less: Additional Transfers - CIP (PY Surplus) (1.2) (1.2) - 0.0%
Less: Transfers to Pension (PY Surplus) (0.4) (0.4) - 0.0%
Less: Transfers to CIP (Landslide, October 1, 2024) (6.4) (6.4) - 0.0%
50% Reserve Policy (16.0) (16.0) - 0.0%
PROJECTED Unallocated Fund Balance - 06/30/25 $12.9 $13.2 $0.3 2%
Changes
1/21/25
13
Chart 1. Projected 10-Year Financial Model
Chart 2. Projected 10-Year Unallocated Fund Balance
CIP Fund
The CIP Fund ended the year with a fund balance of approximately $29.6 million. By year -
end, revenues totaled approximately $6.8 million, including $5 million from General Fund
TOT transfers and $1.8 million from interest earnings. On the expenditure side, of the
$27.8 million budget, the capital projects ended at $12.5 million. Majority of this amount
was $5.8 million for landslide-related expenditures, $4.9 million from the Ladera Linda
Community Park, and $0.5 million for the retaining wall at Crest.
Similar to the General Fund, staff had already anticipated these figures and included them
in the financial reports presented to the City Council at its meetings between October and
December 2024. The difference between those reports and the draft results is a change
in the starting balance from $33 million to $29.6 million. The $3 million variance is primarily
14
10 Year Financial Model
Revenues & Expenditures, Net of Transfers
$60.0
$50.8 $50.4 $51.8
$46.8 $47.9 $49.3
$50.0 $44.3 $45.4 $52.8 $51 .4
$48.6 $50.0
$47.3
$40.0 $44.7 $46.0
$30.0
$20 .0
$10.0
$0.0
2024E 2025B 2026F 2027F 2028F 2029F 2030F 2031F 2032F 2033F
--Revenues and Transfers $40 .4 $42.7 $43.5 $44.7 $46.0 $47.3 $48 .6 $50.0 $51.4 $52 .8
--Expenditures and Transfers $36.4 $50 .8 $42 .5 $44.3 $45 .4 $46 .8 $47.9 $49 .3 $50.4 $51.8
$80.0
$70.0
$60.0
$50.0
$40.0
$30.0
$20.0
$10.0
$0.0
FY2024·25 FY2025·26 FY2026·27 FY2027·28 FY 2028-29 FY2029·30 FY 2030-31 FY 2031-32 FY2032·33
■ Fund Balance ■ 50% CC Policy Reserve ■ Unallocated
attributed to the accrual of invoice and retention payments paid in July-August 2024 for
services rendered by June 30, 2024.
Based on the draft results for FY 2023-24, Table 4 below reflects an updated beginning
fund balance of $29.6 million. For FY 2024 -25, revenues are projected to total $16.3
million, with expenditures estimated at $23.1 million. The majority of the revenues, $14.2
million, are transfers from the General Fund, which includes $6.4 million of additional
transfers and $2.2 million from Supervisor Hahn’s office to continue to support landslide
emergency response and mitigation projects. The estimated year-end fund balance is
projected at $22.8 million.
The projected expenditures of $23.1 million includes the following key assumptions:
• $15.4 million in landslide expenditures which includes the additional $1.5 million
for DDW maintenance costs from April 2025 to June 2025. Staff will continue to
review and reconcile these expenditures, with a final budget request to be
included in the next landslide financial report in February.
• Invoice and retention accrual of $2.7 million as part of the year-end accrual
process.
• Other capital projects at $3.2 million based on anticipated expenditures by June
30, 2025.
• Ladera Linda loan payment of $0.9 million and $3.6 million loans for the KCLAD
and ACLAD.
Table 4. FY 2024-25 Estimated CIP Fund Balance
Based on this estimated ending balance, Chart 2 below presents a revised five-year
forecast using the FY 2024-25 Adopted Five-Year Capital Program for illustrative
purposes only, in order to provide the City Council with a financial outlook for the next five
years. Further changes to the future capital program and the forecast will need to be re-
evaluated during the upcoming budget workshops for FY 2025 -26, which will be held
between April and June. At this time, the forecast includes the potential deferral of projects
presented in Table 5, totaling $3.9 million, as well as the addition of $5.5 million in annual
maintenance costs for the DDWs in FY 2025-26.
CIP Fund (in millions)
FY 2024-25
Adopted
Budget
FY 2024-25
Revised
Budget
12/17/2024
FY 2024-25
Actual/
Encumbered
1/21/25
FY 2024-25
Year-End
Est
Beginning Fund Balance 07/01/2024 29.6 29.6 29.6 29.6 - 0%
Add: Revenues (Interest Earnings) 0.5 0.5 0.6 1.7 1.2 240%
Add: Transfers-In 6.0 14.6 1.0 14.6 - 0%
Total Revenues 6.5 15.1 1.6 16.3 1.2 8%
Less: Expenditures - Landslide* (1.5) (11.2) (14.2) (15.4) 4.2 38%
Less: Expenditures - Other CIP (9.3) (9.3) (2.0) (3.2) (6.1)-66%
Less: Loan Payment (Ladera Linda) (0.9) (0.9) - (0.9) - 0%
Less: KCLAD/ACLAD Loans - (3.6) (0.3) (3.6) - 0%
Total Expenditures (11.7) (25.0) (16.5) (23.1) (1.9) -8%
DRAFT Restricted Fund Balance - 06/30/25 24.4 19.7 14.7 22.8 3.1 16%
*Transfers-In includes $6.4 million from the General Fund Unallocated Fund Balance and $2.2 million from Supervisor Hahn's Grant approved on 10/1/2024*
*Landslide year-end estimates include $2.7 million invoice/retention accruals from FY 2023-24 and $1.5 million of year-end estimates for DDW maintenance
from April-June 2025*
Changes
to Revised
Budget
15
As shown in Table 5, by deferring the capital projects to FY 2025-26 and adding the
maintenance costs for DDWs, FY 2025-26 is estimated to end the year with a fund
balance of $7 million. This balance is before any additional appropriation that may be
considered for the landslide.
Moreover, assuming the estimated $21 million in FY 2025-26 will be spent and
encumbered by June 30, 2026, subsequently by FY 2026-27, the CIP Fund projects in
the Five-Year Capital Program would have to be revisited in order to meet the City
Council’s reserve policy of a minimum fund balance of $5 million.
Chart 2 – Funding for the FY 2024-25 Adopted Five-Year Capital Program
Review of FY 2024-25 Budget for Other CIP Projects
On December 17, 2024, the City Council directed staff to present a list of other capital
projects and line items budgeted in FY 2024-25 for their review to determine if and what
projects may be deferred in order to allocate funds for additional wells, at the discretion
of the City Council. It should be noted that the City Council adopts a five-year capital
budget program annually. Prior to budget adoption, the Public Works Department
presents the projects to the IMAC for a recommendation to the City Council.
For the City Council’s review, Table 5 on the following page outlines approximately $12
million of estimated balance of the budgeted line items in the FY 2024-25 CIP Fund.
These budgets are for other capital projects (non-landslide related items) that are part of
the FY 2024-25 Five Year Capital Program, and two loans for KCLAD and ACLAD.
CONTINUED ON THE NEXT PAGE
*Five-Year Capital Program are based on projected expenditures (approx. @ 70% of total costs)
16
$25 $23
$20
$15
$10
$5
$0
FY 2024-25 FY 2025-26 FY 2026-27 FY 2027-28
■Five-Year Capital Program -Est. YE Fund Balance
FY 2028-29
Table 5. FY 2024-25 CIP Fund Budget (Other Projects)
Staff recommends the City Council consider deferring the projects highlighted in green in
the table above totaling approximately $3.9 million. These CIP projects are extremely
unlikely to progress past the design stage in FY 2024-25 and will therefore not be ready
for construction funding until FY 2025-26; with the exception of Altamira Canyon, which
is offered for consideration because funding was inadvertently carried over from previous
years. These projects are lagging in their development because staff resources have
been unavailable due to vacancies and a focus on the landslide by the Public Works
CIP Fund Budget Project
Code
FY 2024-25
Original
Budget
FY 2024-25
Revised
Budget
Pending
Cont.
Approp
FY 2024-25
Actual
1/10/2025
FY 2024-25
Encumbered/
Pending
Balance
Crenshaw Blvd. Rehab 8808 675,000 675,000 0 0 75,000 600,000
Park Playground
Improvements 8426 650,000 650,000 0 0 50,000 600,000
Sidewalk Mgmt.
Program 8861 550,000 550,000 22,698 23 22,676 550,000
Western Beautification 8840 1,785,000 1,835,363 0 622 134,741 1,700,000
Altamira Canyon
Drainage 8708 50,000 50,000 443,660 0 0 493,660
Abalone Cove Sewer
Rehab 8202 360,000 360,000 0 0 0 360,000
Civic Center 8503 200,000 200,000 0 0 0 200,000
Facilities Asset Mgmt
Program 8509 825,000 825,000 0 17,645 110,525 696,830
KCLAD Loan 7201 0 1,917,500 0 343,756 0 1,573,744
ACLAD Loan 7201 0 1,610,000 0 0 0 1,610,000
Ladera Linda/Loan
Payment 8405 889,500 919,492 85,493 94,639 889,500 20,845
Wildlife Corridor 8427 540,000 540,000 0 0 0 540,000
SDDIP PVDS @
Peppertree 8715 995,000 995,000 0 0 0 995,000
Storm Drain Lining
Program 8701 485,000 485,000 0 5,750 19,010 460,240
Stormdrain Outlet @
Ocean Crest 8722 85,000 85,000 0 0 0 85,000
Stormdrain Outlet @
Peacock Ridge 8723 285,000 301,382 0 210,208 33,503 57,671
Lift Station PVIC 8724 40,000 40,000 0 0 0 40,000
Guardrails Imp - PVDE 8847 10,100 10,100 0 0 0 10,100
Traffic Imp - PVDS 8828 100,000 100,000 0 9,381 49,580 41,039
Traffic Calming -
Citywide 8846 345,000 408,027 0 59,082 69,928 279,017
Roadway - PVDS 8855 25,000 25,000 0 0 0 25,000
Roadway - Residential 8856 840,000 840,000 0 0 0 840,000
Roadway - PVDE 8858 235,000 235,000 0 0 0 235,000
Roadway - Montemalaga 8860 40,000 40,000 0 0 0 40,000
TOTAL $10,009,600 $13,696,864 $551,851 $741,106 $1,454,463 $12,053,146
For City Council's Review $3,943,660
17
Department leadership. Design work on these projects is expected to progress over the
remainder of FY 2024-25, especially as key vacancies are filled.
Summary
CIP Fund
Based on the year-end estimates and fund balance of $22.8 in the CIP Fund, deferring
approximately $3.9 of capital projects in FY 2024-25 to FY 2025-26 will free up funds for
the maintenance of the current DDWs of approximately $1.5 million remaining in the
current year and a portion of the $5.5 million of maintenance in FY 2025-26. Any
approval of the phases tonight, including additional DDWs, will also require a re-
assessment of the FY 2025-26 Five Year Capital Program at the budget public workshops
in April as FY 2026-27 is projected to have less than the City Council’s reserve policy of
$5 million in fund balance.
General Fund
In summary, the General Fund’s average projected fund balance is approximately $31
million. Of this balance, $21 million is the average amount restricted in order to meet the
City Council’s 50% reserve policy. For unallocated fund balance, the average is $10
million. The City Council’s Reserve Policy of 50% is intended to support general fund
functions such as operational activities for the cities in an event the city experience s a
sudden drop in revenues. The unallocated fund balance is for the City Council’s discretion
for new programs, building of reserves, and fund unforeseen events in the City’s general
operations. Historically, at the end of the year, the City Council approves additional
transfers from the unallocated fund balance to the CIP Fund to support ongoing capital
projects.
Based on the financial information provided including available funds, the City Council is
being asked to determine whether additional DDWs should be installed and if so, how
many. Moreover, if additional DDWs are to be installed, identify which Fiscal Year 2024-
25 Capital Improvement Program projects should be deferred to fund the additional deep
dewatering wells and their operation and maintenance for three months.
ADDITIONAL INFORMATION:
Southern California Edition Re-energization
On January 14, 2025, Southern California Edison (SCE) announced its plan to
provisionally re-energize up to 76 customers in select portions of the Portuguese Bend
Beach Club and Seaview neighborhoods by approximately March 31, 2025. This does
not include the Portuguese Bend Community Association neighborhood. The
announcement comes after SCE President and CEO Steven Powell met with Mayor
David Bradley, Councilmember Steve Perestam, and City Manager Ara Mihranian earlier
this week to discuss re-energization.
Customers who are eligible for restoration will be notified by SCE about the next steps.
As part of the restoration process, properties will be required to undergo electrical and
18
structural property inspections by the City and obtain a permit for any self -generation
installed, including solar, battery storage, and gas-powered generators. Red-tagged
properties will not be considered for restoration.
Eligible customers may schedule an inspection and apply for the necessary permit(s) from
the City by contacting the Building and Safety Division at 310 -544-5280 or by emailing
buildingsafety@rpvca.gov.
Attached is letter SCE sent to eligible customers (Attachment E)
Continuing the Emergency Work and Emergency Contract
As a separate item on tonight’s agenda, the City Council is being provided with an update
on the Portuguese Bend Landslide Emergency construction contracting and being asked
to reconfirm the need to continue the emergency work. This contract will remain on the
each City Council agenda while the emergency declaration is in effect.
Source Water/Hydrology and Hydraulics Study
The City Council previously requested a study into the source of water contributing to land
movement, including water originating outside City limits and from upper watersheds.
Staff issued a request for proposals (via the PlanetBids online platform) for qualified
engineering firms to perform a study into the source of water contributing to land
movement and solutions to re-direct water away from the landslide.
Proposals for the Source Water/Hydrology and Hydraulics Study were received and
evaluated by a panel consisting of the City Manager, Director of Public Works, Director
of Community Development, representative of ACLAD, and representative of KCLAD.
Qualified firms were short-listed and interviews are scheduled to be completed in January
2025. In February 2025, Staff will present a recommendation for the City Council’s
consideration to enter into an agreement with a qualified firm to perform the study.
Public Comments
Attached are public comments received for tonight’s agenda item (Attachment F).
On January 10, 2024 the Seaview Residents Association Board of Directors sent a letter
to the City Council (Attachment F) expressing the following:
• Appreciation for the ongoing efforts to manage the Landslide Complex;
• Agreement with the City Council’s allocation of funding to continue maintenance
and operations of DDWs;
• Support for Mayor Pro Tem Seo’s proposal to fund additional DDWs to complete
the final group;
• Need to fully understand what City funds/resources are already dedicated and
obligated as well as those available for DDW continuation;
• Request that the City Council direct Staff to reach out to the County for financial
assistance;
19
• Need to consider and ultimately establish a sustainable funding source for
continued water removal and mitigation efforts in the future, including the
possibility of a toll on PVDS.
CONCLUSION:
Implementation of the winterization program funded by the City Council as part of the
emergency stabilization and protection measures is substantially complete. Continued
land movement in the Abalone Cove Landslide area has resulted in fissures re -opening
and grabens continuing to expand in and around parts of the Altamira Canyon area over
the past few weeks. Extensive repairs are needed for some of the winterization areas and
staff estimates approximately $500,000 in additional funding is needed to conduct those
repairs.
In response to the City Council’s request, GLA developed a conceptual comprehensive
landslide remediation plan showing the full build-out necessary to remediate movement
in the Landslide Complex to negligible amounts. The plan is conceptual and will be
modified for a variety of reasons. Furthermore, some elements of the conceptual plan are
the responsibility of ACLAD and KCLAD. The phases and estimated costs of the plan are
as follows. With the exception of parts of Phase 1, there is an additional annual operations
and maintenance cost for each phase.
• Phase 0 (Fissure Filling) = minimum of $1M annually
• Phase 1 (12 DDWs Along PVDS/Toe of Slide)
o DDWs 14-16 = $3.75M w/operations and maintenance through June 30,
2025
o DDWs 12-13 plus ACLAD WW18 = $4.5M w/operations and maintenance
through June 30, 2025
o DDWs 17-22 = $8M excluding operations and maintenance
• Phase 2 (19 Upper DDWs) = $26M
• Phase 3 (5 Hydraugers at Toe) = $25M
• Phase 4 (4 Upper Interceptor Hydraugers) = $20M
• Phase 5 (Long-Term Drainage Improvements)
o PBL Canyons and Pipes = $16M
o Altamira Canyon = $18M
o Klondike Canyon = $6M
Other major ongoing costs associated with the accelerated movement include repairs to
the Abalone Cove Sanitary Sewer System, estimated to be $2M to $3M annually; and
repairs to PVDS which are also estimated to be $2 million to $3 million annually.
Finally, the annual operations and maintenance cost for the current DDWs 1 -11 is
estimated to be approximately $0.5 million per DDW, or $5.5 million/year for the 11 current
DDWs. This cost could potentially be lower if there is less shearing and fewer DDWs are
required to be re-drilled. Additionally, if SCE provided electric power is available in place
of generators, the annual cost would be reduced, however; there would be a significant
one-time electrical infrastructure installation cost of several millio n dollars.
20
ALTERNATIVES:
In addition to Staff recommendation, the following alternative actions are available for
the City Council’s consideration:
1. Take no action and simply receive and file this report.
2. Do not defer any Capital Improvement Program projects to make funds available
for additional deep dewatering wells.
21
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DDW-11
DDW-8
DDW-7
DDW-6
DW-3
DW-2
DW-1
DW-5 DW-4
DDW-16
DDW-14
DDW-15
DDW-12
DDW-13
ACLAD WW18
ACLAD WW14
ACLAD WW12
ACLAD WW13
ACLAD WW15
ACLAD WW16
ACLAD WW1
ACLAD WW11
ACLAD WW19
ACLAD WW8
DDW-20
DDW-17
DDW-18
DDW-19
DDW-21
UDW-ACLAD-1
UDW-KCLAD-1
UDW-8 UDW-7
UDW-3
UDW-6
UDW-5
UDW-4
UDW-1
UDW-2
PBL HA #1
PBL HA #2
PBL HA #3
KCLAD HA #1
ACLAD HA #1
ACLAD HA #2
ACLAD HA #3
ACLAD HA #4
ACLAD HA #5
DDW-22
LONG TERM DEWATERING PLAN
1
LEGEND
APPROXIMATE LOCATION OF SHORELINE
APPROXIMATE LIMITS OF LANDSLIDE BOUNDARY
EXISTING TOPOGRAPHY, 5 FT ELEVATION CONTOUR
EXISTING TRAIL
EXISTING ROAD
COMPLETED "TOE" DEEP DEWATERING WELLS
PROPOSED "TOE" DEEP DEWATERING WELLS
PROPOSED "UPPER" DEEP DEWATERING WELLS
PROPOSED HYDRAUGER ARRAYS
3150 BRISTOL STREET
SUITE 210
COSTA MESA, CA 92626
(714) 465-8240
www.geo-logic.com
EXHIBIT NO.
LOS ANGELES COUNTY, CA
30940 HAWTHORNE BLVD.
RANCHO PALOS VERDES,CA 90275
PORTUGUESE BEND LANDSLIDE MITIGATION
CITY OF RANCHO PALOS VERDES
THE CITY OF
RANCHO PALOS VERDES
PROPOSED ACLAD RE-DRILL OF DEEP WELLS
APPROXIMATE LOCATION OF 2023 LANDSLIDE MAPPING
PRESERVE PROPERTY BOUNDARY
APPROXIMATE LOCATION OF ANCIENT ALTAMIRA LANDSILDE BOUNDARY
CONCEPTUAL - FOR PLANNING CONSIDERATION ONLY
A-1
A-2
* ms drawing has not been published but rather has been pr~~~ed iy ;~:~~otcs:~:~~t~s~-1:~~[1o~~i':ebira:le for the use of this drawing on any other facility or for any other purpose.
~> operation, and maintenance of the fac,hty named ~E~hce~:~ou . e APPROVEO BY DATE OF ISSUE: 0812012024 Tl• T REV. NO. DATE 1
1 g t==r--+--------r-----==iOESIGNEDBY: AW&BM
~ E==t==i ==============~~===3 DRAWN BY: ROD
G t==r=---+--------r--=i CHECKED BY: BM 811 I t===----+---____.c_---------j--, APPROVED BY:
3150 Brislol Slreel Suile 210, Cosla Mesa, California 92626
geo-logic.com I 714.465.8240
REVISION 2
DRAWING NO. CITY OF RANCHO PALOS VERDES
PORTUGUESE BEND LANDSLIDE
3 THE CITY OF MITIGATION
RANCHO PALOS VERDESL_-~L O~S_:'AN:.::-G~EL::.:ES=--=C~OU==-N:--:-:TY~, C:::A;::-::--, PROJECT NO,
30940 HAWTHORNE BLVD.
RANCHO PALOS VERDES.CA 90275 SURFACE WATER -CHANNELS so23 ,1202
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-5 00 0 +00 s +'o o 10 00 13 00 -5 0 0 0+00 5+0 0 10 00 12 00
NOTE: 250' o· 12 5 ' 250' 500'
SEE SHEET 108 FOR ENGINEERED SWALE ~~ I TYPE 1, 2, AND 3 SECTIONS .
SCALE: 1" = 250 '
Th is dra wing has nol been published but rather ha s be en prepa red by Ge o-Log ic Assoc iates , Inc . for use by the client named in the titl e block, solely in respect of the construction
operation , and ma intenance of the faci lily named in the title block. Geo-Logic Ass ociates, Inc. shall not be liab le for the use of this drawing on any other facil ity or for any other purpos e. REVISION 2
REV. NO. DATE D ES CRIPTION APPROVED BY T CITY OF RANCHO PALOS VERDES DRAWING NO. DATE OF ISSUE: 08/20/2024
~!!o'?~~!,?9ic DESIGNED BY: AW&BM THE CITY OF PORTUGU ES E BEND LANDSLID E
4 MITIGATION DRAWN BY: ROD RANCHO PALOS V ERDES 3150 Bristol Slreet Suite 210, Cos ta Mesa, California 92626 LOS ANGELES COUN T Y, CA CHECKED BY: BM
geo-logic.com I 714.465.8240 PROJECT NO. an 30940 HAWTHORNE BLVD . SURFACE WATER PROFILES APPROVED BY: RANCHO PALOS VERDES .CA 90275 5023 .1202
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Th is drawing has not been published but rather has b een prepared by Geo-l ogic Associates, Inc. for u se by the cl ient named in the title block, solely in respect of the construclion
operat ion, and maintenance of the racil ity named in the title block. Geo-Logic A ssociates, Inc. shall not be liable for the use of this drawing o n any other facil ity o r for any other purpose.
REV. NO . DA TE DESCRIPTI ON A PPROVED BY T DATE OF ISSUE: 08/20/2024
DESIGNED BY: AW&BM
DRAWN BY: RO D
CHECKED BY: BM
APPROVED BY: 811
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PALOS VERDES ,,-~ / EXISTIN
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3 150 Bri stol S\r ee t Su it e 210, Cos ta Mesa, Ca liforni a 92626
geo-log ic.co m I 71 4.465.8240
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THE CITY O F
RANCHO PALOS V ERD ES
30940 HAWTHORNE BLV D.
RANCHO PALOS VERDES,CA 90275
---
15
200
I 90
1 80
I 70
1 60
I 50
1 40
I 30
20
I 10
0 0
NOTES:
1.CONTRACTOR IS RESPONSIBLE TO FIELD VERIFY EXISTING PIPE
LOCATION, FLO\Nl.lN E ELEVATIONS, SIZE ANO FUNCTIONA LITY.
2. CONTRACTOR IS RE SPONS IBLE TO RESTORE FUNCTIONALITY OF
EXISTING 64" DIAMETER PIPE TO A STATE EQUIVALENT TO THAT OF
A NEW SMOOT H-WAL LED PLASTIC PIPE WITH A MINIMUM DIAMETER
DF60"'.
3. OPTION A (100 YR/24 HR DESIGN STORM): INSTALL (4) NEW 60"
DIAMETER GLASS RE INFORCED PLASTIC (GRP) PIPE BY
MICROTUNNELI NG
OP TI ON B; INSTALL NEW CONCRETE BOX CULVERT(S) BY CUT AND
COVER METHOD · (1) 7'X6' OR (2) 6'X5'.
4. EXISTING TOPOGRAPHY PROVIDED BY CITY OF RANCHOS PALOS
VERDES DATED 20 17 AND UPDATED BY CALVADA SURVEYING , INC.
IN JA NUARY 2024.
5. CONTRACTOR IS RESPONS IBLE TO PROVIDE A •PIPE
CERTIF ICATION REPORT" STAMPED BY CALI FORN IA PROFESSIONAL
ENGINEER IF THE PIPE REQU IRES ANY REF URBISHMENT ANO/OR
RESTORATION, THE REPORT MUST INCLUDE RECOMMENDATIONS
FOR RETROF ITTING/RESTORATI ON.
20' o· 10 ' 20' 40 ' ~'al I
SCALE: 1" 20'
REVISION 2
CITY OF RANCHO PALOS VERD ES
PORTUGUESE BEND LANDSLIDE
MIT IGATION
DRAWING NO.
6
LO S ANGELES COUN TY, CA
SUR FAC E WAT E R PROFIL ES
PROJECT NO.
5023 .1 20 2
A-5
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-'PE
t
90
80
NOTES:
1.CONTRACTOR IS RESPONS IBLE TO FJELD VERIFY EX ISTING P IPE
LO CATI O N, FLOWL IN E ELEVATION S, S IZE A ND FUNCTIONALITY.
2. CONTRAC TOR IS RE SPONS IBLE TO RES TORE FUNCTIONALITY OF
EXISTING PIPE TO A STATE EQ UIVA LEN T TO THAT OF A NEW PIPE
OF TH E SAME NOMINAL DIAM ETER.
3. EXISTING TOPOGRAPHY PROVIDED BY CITY OF RANCHO PALOS
VERDES, DATED 2017 A NO UPDATE D BY CALVADA SURVEYING, IN C.
IN JANUARY 2024 .
4. INSTALLATION OF PIP E SHALL BE BY TRENCHLESS METHODS .
I /
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This drawing has not been published but rather has been prepared by Geo.Logic Associates, Inc. for use by the client named in the lille block, solely in respect of the construction
operation , and maintenance of the facil ity named in the title block. Geo-Logic Associates, Inc. shall not be liable for th e use of th is drawing on any olher facil ity or for any other purpose.
REV. NO. DATE DESCRIPTION APPROVED BY T DATE OF IS SUE: 08/20/2024
DESIGNED BY: AW&BM
DRAWN BY: RDO
CHECKED BY: BM
APPROVED BY : 811
61 00
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3150 Bristol Street Suite 210, Costa Mesa, California 92626
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30940 HAWTHORNE BLVD.
RANCHO PALOS VERDES.CA 90275
50
40
30
63 00
20 ' o· 10' 20' 40' r--~-i I
SCALE: 1" 20 '
REVISION 2
CITY OF RANCHO PALOS VERDES
PORTUGUESE BEND LANDSLIDE
MITIGATION
LOS ANGELES COUNTY, CA
SURFACE WATER PROFILES
DRAWING NO .
7
PROJECT NO.
S023.1202
A-6
0812012024
AW&BM
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811
3150 Bristol Str eet Sui te 2 10, Costa Mesa, Ca liforn ia 92626
geo-logic.com J 714.465 .82 40
THE CITY OF
RANCHO PALOS VERDES
30940 HAWTHORNE BLVD.
RANCHO PALOS VERDES,CA 90275
KEY MAP (NOT TO SCALE)
LEGEND
-200 -
-200-
EXISTING TOPOGRAPHY, 10 FT ELEVATION CONTOUR
EXISTING TOPOGRAPHY, 2 FT ELEVATION CONTOUR
PROPOSED GRADE, 10 FT ELEVATION CONTOUR
PROPOSED GRADE, 2 FT ELEVATION CONTOUR
EXISTING 60" CU LVERT
PRESERVE PROPERTY BOUNDARY
EXISTING TRAI L
PROPOSED DRAINAGE FACILITY
A . (4) 60" GRP PIPE/MICROTUNNEL
B. (1) 7'X6' OR (2) 6'XS' BOX CULVERTS
60' O' 30' 60' 120' ~ I
NOTES
1. EX ISTING TOPOGRAPHY PROVIDED BY CITY OF RANCHOS PALOS
VERDES DATED 20 17 AND UPDATED BY CALVADA SURVEYIN G, INC. IN
JANUARY 2024 .
2. CON TRACTOR IS RESPONSIBLE TO FIELD VERIFY ELEVAT IONS
SHOWN .
3.
4.
AUTOCAD FILES Wl LL BE PROVIDED TO THE CONTRACTOR.
CONTRACTOR WlLL BE REQUIRED PERFORM A TOPOGRAPHIC
SURVEY BEFORE AND AFTER CONSTRUCTI ON.
5. WlHERE PROPOSED SWALES CROSS OR PARALLEL EXISTING T RAI LS,
MODIFY TO MAINTAIN FULL TRAIL FUNCTIONALITY.
REVISION 2
CITY OF RANCHO PALOS VERDES
PORTUGUESE BEND LANDSLID E
MITIGATION
LOS ANGELES COUNTY, CA
DRAWING NO .
8
,__ ____________________ _, PROJECT NO,
FLOW REDUCTION AREA GRADING SO23.1202
A-7
~ REV. NO, DATE DESCRIPTION APPROVED BY
<1> DATE OF IS SUE:
a.
~ l-----+-----+------------+------1 DESIGNED BY: ol-----+-----+------------+------1
i5 DRAWN BY: i l-----+-----+------------+------1 CHECKED BY:
:i 0-----+---+-----------+------1
APPROVED BY:
08/20/2024
AW&BM
ROD
BM T
811
3150 Bristol Street Suite 210, Costa Mesa, California 92626
geo-logic.com I 714.465.8240
THE CITY OF
RANCHO PALOS VERDES
30940 HAWTHORNE BLVD.
RANCHO PALOS VERDES.CA 90275
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1.1.1~----~~~~~11111111111~1
CITY OF RANCHO PALOS VERDES
PORTUGUESE BEND LANDSLIDE
MITIGATION
LOS ANGELES COUNTY, CA
DRAWING NO.
9
1-----------------~ PROJECTNO.
LINES A-1 & A-2 REMEDIAL GRADING SO23.1202
A-8
GEOCELL
DETAIL
N.T.S.
EXAMPLE ENGINEERED SWALE
ISOMETRIC/CUTAWAY VIEW
SECTION
N.T.S.
TYPE 1
ENGINEERED SWALE
SE CTION
N.T.S.
TOPSOIi/
Sil T DEPOSIT
GEOCE LL WITH
GRAVEL IN FILL
PREPARED
SUBGRADE
GEOVVEB GW40V OR
APPROVED EQUIVA LENT,
GIN GRAVEL INF IL L
8oz/YD NON WOVE N
GEOTEXTILE
PR EPARED SU BGRADE
EXAMPLE ENGINEERED SWALE
CROSS-SECTION VIEW
SECTION
G9 N.T.S .
This drawing h a s not been p ublished but ra ther has been pre pared by Geo-logic A ssociates, Inc. for u se by th e c lie nt na m ed in the title b lock, solely in respect of the construclion
o peratio n, an d m aintena nce of the facility named in the title block. Geo-Logic A ssoc iates, Inc. shalt no t b e liable for the use of thi s draw ing on any o ther fac ility or fo r any othe r purpose .
REV, NO. DATE D ESCRIPTION APPROVED BY
DATE O F ISSUE: 08/2 0/2 024
~~0C?~A~~9ic D ESIGNED BY: AW&BM
DRAWN BY: ROD
TYPE 2
ENGINEERED SWALE
SE CTION
N.T .S.
11 12
ea 12
8.0J 0
LIFTIUG E'Y'E
GUAAI> FOR
FA U & COUPLER
CHECKED BY: BM T 3150 Bristol Street Suile 210, Costa Mesa, California 92626
an geo-logic .com j 714.465.8240
APPROVED BY:
GEOWEB GWJOV OR
APPROVE D EQU IVAL ENT,
SIN GRAVEL IN FILL
8oz/YO N ON WOVEN
GEO TEXTIL E
PRE PARE D SUBGRADE
EXAMPLE
ELECTRIC PUMP
DETAIL
N.T.S. G9
THE CITY OF
OOCG
RANCHO PALOS VERDES
30940 HAWTHORNE BLVD.
RA NC HO PALOS VERDES.CA 90275
~
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TYPE3
ENGINEERED SWALE
SECTION
N .T.S.
11 I
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WHER E SHOW JN PLANS
GEOWEB GW20V OR
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W
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EXAMPLE WATER STORAGE TANK
DETAIL
N.T .S.
REVISION 2
CITY OF RANCHO PALOS VERDES
PO RTU G UE SE BEND LANDSLID E
MITIGATION
DRAWING NO.
10
LOS ANGELES COUNTY, CA 1-------------------------1 PROJECT NO.
DETAIL sO23.1202
A-9
Concrete Lining of Abalone
Cove Tr ibutaries
(show n in ye ll ow)
ABALONE
COVE
EXPLANATION
Limits of the Ancient Portuguese Bend Landslide Complex
---Limits of Historically Mapped Landslides
__. 2023 Landslide Mapping
-Current Limits of Major Land Movement (February 2024)
Aba lone Cove
Dra inage Improvements
Klondike Canyon
Drainage Improvements
Concrete Lining of
Klondike Canyon
(shown in yellow)
A-10
A-11
N
0
N
..;
S _ . b the client named in the UUe block, solely in ,espect of the co nstructio n i;l Th is drawing has not been publish ed bu t rather h?s been prepared ~y G~o-L"X,cs:~:~:t~:~. l~~~:~~it'ie lable for the use of this drawing on any olhe r facilily or fo r any other purpcse. ~ operatio n andmainlena nceo(the faci lity namedm l hellllebloc.k. eo-og1c s ' T
~ REV. NO.' DATE DESCRIP TI ON APP ROVED BY DATE OF ISSU E : 08/20/20 24
:g C:_j_ _ _j_ ______ ll -.□ ES
IGNEDBY: A W &BM •
~ C:=-L--+----------j,-. DRAWN BY: RO D
!j?l===t===t==============t====i L CHECKED BY: BM 811
APPROVED BY;
3 150 Bristol Str ee t Suite 210, Cos ta Me sa, California 92626
geo-log ic.com j 7 14.4 65.82 40
600'
I
FRACTURE TOTAL
LENGTH (FT) VOLUME (1,2) LOCAT101, NUMBER (C.Y.)
1 1,632 604
2 702 260
3 242 90
TOTAL 2,S76 954
CITY OF RANCHO PALOS VERDES DRAWING NO .
PORT UGUESE BE ND LA NDS LI DE 25 THE CITY OF M IT IGATI ON
RANCHO PALOS VERDES L __ ~LO::'.S-.:.'.AN_:::G~EL:::_:ES:._:C_:__:OU::.:..:.NTY~, C:---=A =--:-:-::----1 PROJECT NO.
30940 HAWTH ORN E BLV D.
RANC HO PALOS VER DES,CA 90275 FRA CT URE IN FILLIN G LOCATIO NS sO23 .1202
A-12
::
!
8
~ w This drawing has not been published but rather has been prepared by Geo-logic Associates, Inc. for use by the client named in the title block, solely in respect of the construction
~ operation, and maintenance of the facility named in the title block. Geo-Logic Associates, Inc. shall no! be liable for the use of this drawing on any other facility or for any other purpose.
UJ > REV, NO, DATE DESCRIPTION APPROVED BY
en l-----+---t----------------+--------1 DATE OF ISSUE:
'3 cl' l-----+---t----------------+--------1 DESIGNED BY: ol-----+---t----------------+--------1
[j o-------r---t-------------------+--------< DRAWN BY:
~ o-------r---t-------------------+--------< CHECKED BY:
zo-------r---t-------------------+--------<
APPROVED BY:
08/20/2024
AW&BM
RDD
BM T
811
3150 Bristol Street Suite 210, Costa Mesa, California 92626
geo-togic.com I 714.465 .8240
THE CITY OF
RANCHO PALOS VERDES
30940 HAWTHORNE BLVD.
RANCHO PALOS VERDES.CA 90275
80' 0' 40' 80' ~~.-J
LEGEND
CRACK SEALING AREAS
I FRACTURE LOCATION
QUANTITIES
APPROXIMATE AREA
AREA #1 = 9,800 SF
AREA #2 = 12,740 SF
AREA #3 = 75,000 SF
AREA #4 = 12,000 SF
AREA #5 = 4 BOO SF
TOTAL ESTIMATE AREA= 120,340 SF
160'
I
REVISION 2
CITY OF RANCHO PALOS VERDES
PORTUGUESE BEND LANDSLID E
MITIGATION
LOS ANGELES COUNTY, CA
CRACK SEALING AREAS
DRAWING NO.
29
PROJECT NO,
SO23,1202
A-13
SUR FA CE
j OPEN, SURFACE TENSION CRACK
N
0
N
l:i
0
INFILL CRACKS TO MINUS 18" FROM
LOW SIDE SURFACE WITH BENTONITE
PELLETS OR DRILLING CUTTINGS
CRACK SEALING
OPTION
DETAIL
NTS
SURFACE
-18'
l
~ This drawing has not been published but rather has been prepared by Geo-Logic Associates, Inc. for use by the client named in the title block, solely in respect of the construction
~ operation, and maintenance of the facility named in the title block. Geo-logic Associates, Inc. shall not be liab!e for the use of this drawing on any other facility or for any other purpose.
~ REV. NO. DATE DESCRIPTION APPROVED BY <nl----+---+---------------1------1 ~l----+---+---------------1------1
o l----+---+---------------1------1
I
<>o----+----t------------------t-----
i -----+----t------------------t-----
z .,.__--+---+-------------1------1 T DATE OF ISSUE: 08/20/2024
DESIGNED BY: AW&BM
DRAWN BY: ROD
CHECKED BY: BM
APPROVED BY: 811
R E-GRADE UPPER 18" OF NATIVE SOIL
TO INFILL REMAINDER OF VOID AND COVER
BENTONITE PLUG (DRILLING CUTTINGS) AND
CREATE A NEW SMOOTH SURFACE WITH
POSITIVE DRAINAGE GRADIENT
RE-GRADED, TRACK-WALKED
SURFACE, MIN 2% SLOPE
CRACK SEALING
OPTION
DETAIL
NTS
RE-GRADE UPPER 18" OF NATIVE SOIL WITH
A COMPACTED (85% MIN. RC .)
SOIL: BENTONITE MIX (5:1)
TO INFILL VOID AND CREATE A NEW SMOOTH
SURFACE WITH POSITIVE DRAINAGE GRADIENT
RE-GRADED, COMPACTED
SURFACE, MIN 2% SLOPE
5:1 SOIL BENTONITE MIX
~!'o~~A~~9ic
3150 Bristol Street Suite 210, Costa Mesa, California 92626
geo-logic.com I 714.465.8240
CRACK SEALING
OPTION
DETAIL
NTS (I;)
THE CITY OF
RANCHO PALOS VERDES
30940 HAWTHORNE BLVD.
RANCHO PALOS VERDES,CA 90275
REVISION 2
CITY OF RANCHO PALOS VERDES
PORTUGU ESE B E ND LANDSLID E
MITIGATION
DRAWING NO.
30
LOS ANGELES COUNTY, CA 1----------------------t PROJECT NO .
CRACK S EALING DETAILS sO23.1202
Notes:
An average month is 30.42 days
* = Indicates no horizontal movement detected in the Period at the 95% level of confidence
$ = Overall Movement is Relative to the Date of Origin which varies, see Page 1 for Date
NAVD88 Rate/Mo
Point North (ft) East (ft) Elev(ft) North East Height Azim.º 2D Dist. North East Height Azim.º 2D Dist. 95%Err Rate/Mo.Note % Chg North East Height Azim.º 2D Dist.Rate/Mo.Point
AB01 1729427.53 6445709.61 178.64 -0.05 0.00 0.02 183 0.05 0.00 0.00 0.03 121 0.01 0.04 *0.01 -0.01 -0.01 315 0.02 AB01
AB02
AB04 1728359.92 6447091.10 62.81 -32.07 -32.24 -4.76 225 45.48 -1.22 -1.30 -0.19 227 1.79 0.04 1.55 -3 -0.41 -0.45 -0.08 227 0.61 1.68 AB04
AB05 1728049.83 6447615.47 77.46 -25.89 -29.70 -3.44 229 39.40 -1.11 -1.14 -0.05 226 1.59 0.04 1.38 -29
AB13 1729888.61 6448225.08 357.16 -40.29 -10.96 -7.87 195 41.75 -2.01 -0.48 -0.35 193 2.07 0.04 1.79 -7 AB13
AB16 1730331.13 6447526.74 374.75 -27.76 -5.38 -1.87 191 28.28 -1.41 -0.26 -0.13 191 1.43 0.04 1.24 -11 AB16
AB17 1731420.96 6446727.78 442.79 -0.17 0.01 -0.01 177 0.17 -0.01 -0.02 0.04 243 0.03 0.04 *AB17
AB21 1729312.29 6449663.25 394.16 -42.78 -11.77 -0.78 195 44.37 -1.89 -0.38 -0.07 191 1.93 0.04 1.68 2 AB21
AB24 1729787.17 6447748.18 334.45 -43.19 -11.78 -1.47 195 44.76 -2.15 -0.53 -0.15 194 2.21 0.04 1.92 -7 AB24
AB50 1728069.19 6448227.93 184.27 -15.81 -20.26 2.29 232 25.69 -0.49 -0.63 0.11 232 0.80 0.04 0.69 -15 -0.14 -0.21 0.06 236 0.26 0.71 AB50
AB51 1729584.47 6447294.52 303.88 -32.54 -12.02 -1.54 200 34.69 -1.64 -0.55 -0.04 199 1.72 0.04 1.50 -11 AB51
AB53 1730388.25 6449704.90 348.49 -42.85 -7.47 -4.64 190 43.50 -1.84 -0.30 -0.18 189 1.87 0.04 1.62 -7 AB53
AB57 1731895.27 6449752.69 555.10 -31.64 -6.68 -9.83 192 32.34 -1.34 -0.98 -0.43 216 1.66 0.04 1.44 -3 AB57
AB58 1731076.39 6449072.65 398.35 -41.63 -2.28 -7.32 183 41.69 -2.03 -0.17 -0.34 185 2.03 0.04 1.77 -2 AB58
AB59 1730803.48 6450207.68 421.98 -47.39 -4.88 -12.39 186 47.64 -1.96 -0.25 -0.61 187 1.97 0.04 1.72 -8 AB59
AB60 1729053.27 6447970.60 176.33 -36.43 -16.97 -3.12 205 40.19 -1.74 -0.84 -0.11 206 1.93 0.04 1.68 -3 AB60
AB62 1728881.35 6446909.03 139.92 -29.00 -16.43 -3.09 210 33.34 -1.21 -0.85 -0.16 215 1.48 0.04 1.28 -6 -0.38 -0.30 -0.09 219 0.49 1.35 AB62
AB63 1729025.63 6447287.67 170.79 -33.67 -19.37 -10.06 210 38.84 -1.47 -0.93 -0.48 212 1.74 0.04 1.51 -9 -0.47 -0.30 -0.14 212 0.56 1.54 AB63
AB64 1731829.26 6447374.40 531.64 -1.43 1.32 -0.61 137 1.95 0.01 0.00 -0.01 338 0.01 0.04 *AB64
AB65 1731673.06 6448268.39 448.81 -32.61 4.33 -9.72 172 32.90 -1.70 0.11 -0.53 176 1.70 0.04 1.48 -8 AB65
AB66 1730009.79 6448481.23 368.77 -37.49 -9.30 -5.52 194 38.63 -1.81 -0.41 -0.29 193 1.86 0.04 1.62 -9 AB66
AB67 1731154.00 6447740.01 399.40 -26.41 -1.75 -5.93 184 26.47 -1.37 -0.14 -0.32 186 1.38 0.04 1.20 -8 AB67
AB68 1730222.39 6448047.58 386.73 -36.46 -7.78 -6.72 192 37.29 -1.83 -0.39 -0.34 192 1.87 0.04 1.62 -7 AB68
AB70 1729249.25 6448338.05 250.58 -42.23 -14.82 -3.57 199 44.76 -1.97 -0.48 -0.40 194 2.03 0.04 1.76 -11 AB70
AB73 1728421.97 6448381.16 303.89 -34.07 -12.87 -2.82 201 36.42 -1.35 -0.44 -0.09 198 1.42 0.04 1.23 1 AB73
AB74 1729594.66 6446845.81 269.53 -10.93 -7.33 -2.37 214 13.16 -0.82 -0.67 -0.26 219 1.06 0.04 0.92 -9 AB74
AB75 1729594.09 6449329.48 347.86 -26.07 -6.88 -1.15 195 26.97 -1.89 -0.38 -0.07 192 1.92 0.04 1.67 2 AB75
AB76 1730022.78 6446806.97 385.77 -0.34 0.33 -0.50 136 0.48 0.00 0.00 -0.02 135 0.01 0.04 *AB76
AB77 1733161.91 6446514.81 895.40 -0.01 0.08 180 0.01 -0.01 -0.03 0.10 255 0.03 0.04 *AB77
AB78 1732238.87 6448523.66 568.94 -2.30 0.79 -0.81 161 2.43 -0.11 0.07 0.00 147 0.13 0.04 0.11 AB78
AB79 1734784.22 6448719.01 1169.75 0.01 0.01 -0.01 31 0.02 0.00 -0.01 0.04 264 0.01 0.04 *AB79
AB80 1734692.15 6447838.32 1165.56 0.00 0.01 0.01 90 0.01 -0.02 0.01 0.05 156 0.03 0.04 *AB80
AB81 1731137.45 6448788.20 395.73 -2.95 -0.24 -0.58 185 2.95 -1.86 -0.15 -0.40 185 1.87 0.04 1.62 -0.58 -0.03 -0.12 183 0.58 1.62 AB81
CR50 1733013.07 6451036.41 872.32 -0.54 -0.34 180 0.54 -0.01 -0.03 0.04 251 0.03 0.04 *CR50
CR51 1733061.34 6452360.86 976.01 -0.70 -0.24 180 0.70 -0.03 -0.03 0.11 227 0.04 0.04 *CR51
CR53 1732779.45 6450222.83 780.35 -0.83 -0.38 180 0.83 -0.02 -0.02 0.07 230 0.03 0.04 *CR53
CR54 1731208.97 6450985.21 518.66 -36.26 -8.89 180 36.26 -1.67 -0.61 -0.23 200 1.78 0.04 1.54 -4 CR54
CR55 CR55
CR55A 1735437.67 6450188.40 1157.37 0.00 -0.01 0.10 264 0.01 0.00 0.00 0.03 14 0.00 0.04 *CR55A
CR56 1733194.39 6449201.92 782.66 -0.02 0.08 180 0.02 0.00 0.01 0.07 68 0.01 0.04 *CR56
CR57 1731568.82 6451323.48 619.45 -0.05 0.51 180 0.05 0.00 0.02 0.00 75 0.02 0.04 *CR57
CR58 1732680.43 6452989.37 916.95 -0.18 -0.05 180 0.18 -0.03 -0.03 0.05 225 0.04 0.04 *CR58
CR59 1731860.94 6453394.75 878.09 -0.03 0.00 180 0.03 -0.01 0.00 0.03 198 0.01 0.04 *CR59
CR60 1732970.77 6452807.53 921.86 -0.06 0.00 180 0.06 0.00 -0.01 0.02 278 0.01 0.04 *CR60
CW01 1734174.34 6450266.36 1175.45 0.03 0.10 0 0.03 0.05 0.00 0.06 6 0.05 0.04 *CW01
CW05 1732067.26 6450634.50 701.93 -1.10 0.00 180 1.10 -0.03 -0.02 0.05 220 0.04 0.04 *CW05
CW06 1730906.24 6452118.21 529.83 0.00 0.06 0 0.00 -0.01 0.01 0.05 155 0.02 0.04 *CW06
CW07 CW07
CW08 1729146.30 6453119.79 607.51 0.01 0.06 0 0.01 0.00 0.00 0.00 225 0.00 0.04 *CW08
FT06 FT06
FT08 1729388.67 6453350.47 658.41 -0.01 -0.03 180 0.01 -0.01 0.00 0.00 191 0.01 0.04 *FT08
FT09 1729052.87 6454289.23 590.84 -0.03 0.01 180 0.03 0.02 0.00 -0.01 356 0.02 0.04 *FT09
FT10 1730454.54 6452471.92 482.28 -0.03 -0.07 180 0.03 0.00 0.00 -0.01 90 0.00 0.04 *FT10
KC05 1727077.20 6453174.13 226.80 -4.80 -4.96 -1.06 226 6.90 0.03 0.02 -0.04 32 0.04 0.04 *KC05
KC06 1727782.50 6453384.93 295.73 -2.41 -11.73 -4.62 258 11.98 0.01 -0.12 0.00 272 0.12 0.04 0.10 KC06
KC07 1727759.40 6453683.88 313.45 0.02 0.03 -0.06 54 0.04 0.03 0.00 -0.01 358 0.03 0.04 *KC07
KC13 1726576.33 6453068.86 192.01 -4.83 -0.77 0.81 189 4.89 0.01 -0.03 -0.03 287 0.03 0.04 *0.00 -0.02 -0.01 258 0.02 KC13
KC14 1726742.31 6453805.53 259.98 -0.13 -0.52 0.04 256 0.54 0.03 -0.02 -0.01 326 0.03 0.04 *KC14
KC15 1727584.42 6453111.51 284.11 -6.03 -9.59 -2.99 238 11.33 0.03 -0.03 0.05 308 0.04 0.04 *0.02 -0.02 0.05 306 0.03 KC15
KC16 1727602.24 6454098.25 327.23 -0.01 0.01 0.33 113 0.02 0.01 -0.01 -0.01 332 0.02 0.04 *KC16
KC17 1727295.86 6453019.57 212.84 -6.90 -6.85 -2.42 225 9.73 0.02 0.02 0.08 40 0.03 0.04 *0.02 -0.01 0.10 336 0.02 KC17
KC18 1727979.55 6452613.68 289.13 -20.95 -8.48 -2.05 202 22.60 0.02 -0.02 0.01 311 0.03 0.04 *KC18
KC19 1727780.05 6453488.60 302.81 -0.35 -8.62 -3.53 268 8.63 0.03 -0.04 -0.02 302 0.05 0.04 *KC19
KC20 1727695.38 6453561.65 303.80 0.21 -7.89 -3.50 272 7.90 0.03 -0.03 -0.01 313 0.04 0.04 *KC20
KC21 1728095.85 6453495.11 383.61 0.02 0.03 0.00 46 0.04 0.01 -0.01 -0.06 320 0.02 0.04 *KC21
KC22 1728008.16 6453287.44 329.18 -2.00 -10.45 -5.17 259 10.64 0.03 -0.02 -0.02 334 0.03 0.04 *KC22
KC23 1727348.79 6453321.59 267.57 -2.63 -5.42 -1.73 244 6.03 0.02 -0.03 0.01 308 0.03 0.04 *KC23
KC24 1726972.35 6452123.06 13.74 -11.31 -3.83 -0.45 199 11.94 0.02 -0.03 0.05 299 0.04 0.04 *KC24
KC25 1726304.89 6452805.40 19.77 -0.40 -0.22 -0.03 208 0.45 0.00 -0.04 0.02 264 0.04 0.04 *KC25
KC26 1726723.09 6452425.80 31.15 -6.44 -1.32 6.41 192 6.57 0.02 -0.04 0.04 299 0.04 0.04 *KC26
KC28 1726768.67 6451998.87 26.25 -9.13 -1.04 6.31 186 9.19 0.02 -0.03 0.00 299 0.03 0.04 *KC28
KC29 1726924.01 6451934.55 20.00 -10.42 -3.09 2.10 197 10.87 0.00 -0.01 0.01 266 0.02 0.04 *KC29
KC30 1727529.58 6452142.01 97.75 -14.47 -4.50 -2.51 197 15.15 0.01 -0.04 0.11 277 0.04 0.04 *KC30
KC31 1727911.16 6452353.23 206.89 -13.77 -4.98 -0.61 200 14.64 0.04 -0.02 -0.04 333 0.04 0.04 *0.02 -0.03 -0.04 310 0.04 0.10 KC31
KC33 1727817.34 6453174.72 310.31 -1.17 -3.43 -1.59 251 3.62 0.01 0.01 -0.09 27 0.02 0.04 *KC33
KC34 1726698.39 6454866.45 325.36 -0.01 0.02 -0.01 122 0.02 -0.02 0.01 0.00 159 0.02 0.04 *KC34
KC35 1726861.67 6454504.97 313.28 0.01 0.01 -0.02 35 0.01 0.01 0.01 0.01 30 0.02 0.04 *KC35
KC36 1726390.08 6454165.14 255.01 0.01 -0.02 0.00 293 0.02 0.01 0.02 0.02 55 0.02 0.04 *KC36
KC37 1726109.84 6454779.84 280.35 0.02 0.00 0.02 357 0.02 0.01 0.00 0.03 339 0.01 0.04 *KC37
KC38 1726817.44 6451606.53 13.29 -1.08 -0.30 0.48 195 1.12 -0.07 0.01 -0.03 174 0.07 0.04 0.06 KC38
PB04 1727623.88 6448833.37 164.27 -52.06 -18.37 -6.25 199 55.20 -1.31 -0.45 -0.07 199 1.38 0.04 1.20 -3 -0.43 -0.16 -0.04 200 0.45 1.26 PB04
PB06 1727898.24 6449747.97 173.91 -70.21 -13.87 -9.15 191 71.56 -0.93 -0.07 -0.10 184 0.93 0.04 0.81 -9 -0.30 -0.03 -0.08 186 0.30 0.82 PB06
PB07 1728092.57 6450198.35 195.88 -83.35 -21.41 -4.33 194 86.06 -1.01 -0.14 -0.09 188 1.02 0.04 0.88 -4 -0.33 -0.04 -0.07 187 0.33 0.92 PB07
PB08 1728159.90 6450450.58 195.79 -77.61 -19.22 2.11 194 79.95 -0.88 -0.03 0.00 182 0.88 0.04 0.76 -1 -0.30 -0.03 -0.02 185 0.30 0.83 PB08
PB09 1728206.45 6450840.59 188.32 -82.13 -10.43 -4.20 187 82.79 -0.73 0.06 0.06 176 0.73 0.04 0.64 0 -0.24 -0.01 -0.02 182 0.24 0.67 PB09
PB12 1728204.52 6451566.63 178.42 -125.97 -37.94 -14.87 197 131.56 -0.56 -0.10 -0.02 191 0.57 0.04 0.49 11 -0.20 -0.05 0.04 194 0.21 0.58 PB12
PB13 1728005.38 6452133.14 205.75 -80.59 -31.20 -4.79 201 86.42 -0.13 -0.09 0.01 214 0.16 0.04 0.14 0 -0.05 -0.03 0.03 206 0.06 0.16 PB13
PB18 1730386.93 6450714.84 356.88 -59.95 3.84 -10.70 176 60.08 -1.62 -0.12 -0.19 184 1.63 0.04 1.41 -8 PB18
PB20 1728692.61 6451110.93 225.45 -120.16 -24.75 -18.09 192 122.68 -0.85 -0.05 -0.15 183 0.85 0.04 0.74 6 PB20
PB21 1729197.62 6451171.05 266.31 -100.59 -1.00 -13.72 181 100.60 -0.98 0.03 -0.08 178 0.98 0.04 0.85 2 PB21
PB26 1729505.35 6452245.65 280.04 -57.30 -3.91 -5.30 184 57.43 -0.30 0.05 -0.05 171 0.31 0.04 0.27 -4 -0.10 0.01 0.00 172 0.10 0.27 PB26
PB27 1729192.69 6451833.92 261.77 -146.65 -2.14 -22.65 181 146.67 -0.90 0.01 -0.17 179 0.90 0.04 0.78 9 PB27
PB29 1728803.43 6452077.50 160.17 -85.52 -42.99 -25.76 207 95.72 -0.13 -0.16 -0.07 231 0.20 0.04 0.18 -1 PB29
PB54 1729647.79 6450439.14 355.92 -47.11 -9.55 -2.70 191 48.06 -1.63 -0.22 0.03 188 1.64 0.04 1.43 -5 PB54
PB55 1728729.78 6450790.22 232.19 -82.50 -13.82 -14.14 190 83.65 -1.10 -0.01 -0.06 180 1.10 0.04 0.96 18 PB55
PB59 1727711.16 6448644.38 151.91 -55.21 -17.29 -11.49 197 57.85 -1.31 -0.42 -0.16 198 1.37 0.04 1.19 -5 PB59
PB67 1727551.32 6450841.96 64.54 -87.41 -16.22 -11.47 191 88.90 -0.58 -0.09 -0.13 189 0.59 0.04 0.51 7 -0.19 -0.06 -0.05 197 0.20 0.54 PB67
PB68 1727626.74 6448969.34 171.94 -38.71 -13.65 -1.17 199 41.04 -1.33 -0.38 -0.09 196 1.38 0.04 1.20 -3 PB68
PB69 1727742.51 6448763.46 162.22 -40.53 -15.12 -2.46 200 43.26 -1.26 -0.43 -0.07 199 1.33 0.04 1.16 2 PB69
PB70 1727814.85 6448603.97 149.69 -40.06 -15.62 -6.55 201 43.00 -1.35 -0.43 -0.14 198 1.42 0.04 1.23 -3 -0.44 -0.16 -0.05 200 0.46 1.28 PB70
PB71RP 1728429.21 6449741.08 284.14 -4.46 -0.52 -0.70 187 4.49 -1.74 -0.22 -0.33 187 1.75 0.04 1.52 3 PB71RP
PB72 1727619.19 6449327.80 199.19 -31.14 -13.62 3.30 204 33.99 -1.25 -0.44 -0.06 200 1.32 0.04 1.15 -4 PB72
PB74 Destroyed
PB75 1729048.65 6450345.03 268.69 -35.20 -6.88 -3.22 191 35.87 -1.40 -0.02 -0.16 181 1.40 0.04 1.21 -6 PB75
PB76 1729969.94 6451645.68 291.27 -3.16 -0.19 -0.53 183 3.16 -0.64 0.01 -0.14 179 0.64 0.04 0.56 8 -0.21 0.00 -0.06 181 0.21 0.57 PB76
PB77 1727520.63 6451676.03 99.04 New Point PB77
UB02 1727472.41 6450140.19 65.46 -108.70 6.40 -1.69 177 108.89 -0.34 0.11 0.02 163 0.35 0.04 0.31 -3 -0.13 0.00 -0.02 180 0.13 0.37 UB02
PVE3RP 1729195.89 6438764.67 346.87 0.01 -0.01 -0.01 0.01 0.01 -0.02 -0.02 0.02 0.04 * -0.01 0.01 0.00 0.01 PVE3RP
RP01 1725591.75 6455633.55 292.71 0.00 0.02 -0.02 0.02 -0.01 0.00 -0.01 0.01 0.04 * 0.00 0.00 -0.03 0.01 RP01
RP02 1730832.98 6445586.64 480.61 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 Fixed Fixed 0.00 0.00 0.00 0.00 RP02
RP03 1730848.50 6445628.20 479.96 -0.02 0.00 0.02 0.02 0.00 0.00 0.00 0.01 0.04 * 0.01 -0.01 0.01 0.01 RP03
RP05 1730809.66 6445501.99 474.21 0.00 0.00 0.00 0.00 0.00 -0.01 0.00 0.01 * 0.00 0.00 0.00 RP05
Av.1.12 Av. -3 Av.0.85
NAD83 CA SPC Zone 5 Original Position to January 07, 2025 Dec. 3, 2024 to January 7, 2025 (35 days / 1.151 Mo.) Dec. 27 to Jan. 07, 2024 (11 days / 0.362 Mo.)
PORTUGUESE BEND LANDSLIDE MONITORING - MOVEMENT as of January 7, 2025 Page 39/39
Prepared by McGee Surveying Consulting - Document Date: January 12, 2025
Monitoring Point Movements
Full MONITORING #60 (M60)
January 07, 2025 Positions $ Overall Movements (US Feet)Periodic Movements M56 to M60 (US Feet)Periodic Movements M59 to M60 (US Ft)
B-1
••w ~@ MicllaclR.McGee.PLS394 S
... ~ ~·
I I I I I
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
PALOS VERDES DRIVE SOUTH
BURMA
ROAD
EXPLANATION
Limits of the Ancient Portuguese Bend Landslide Complex
Limits of Historically Mapped Landslides
2023/2024 Landslide Features
(based on CSA field mapping)
SEAVIEW TRACT
Limits of 2023-2024 Major Landslide Movement
(based on CSA field mapping and bathymetry survey)
LIMITS OF 2023-2024
MAJOR LANDSLIDE
MOVEMENT
GPS Monument Displacement Rate
(December 3, 2024 to January 7, 2025)
Displacement Vector Scale 1"= 8"/week
Displacement Rate Table
Minimum Rate
(inch/week)
2.00
3.00
4.00
5.00
6.00
7.00
8.00
9.00
Maximum Rate
(inch/week)
3.00
4.00
5.00
6.00
7.00
8.00
9.00
10.00
Color
10.00 11.00
11.00 12.00
1.00 2.00
12.00 13.00
0.00 1.00
APPROXIMATE BOUNDARY OF
ANCIENT PORTUGUESE BEND
LANDSLIDE COMPLEX
BEACH CLUB
LANSDSLIDE
RP02
0.00
CW08
0.00
FT10
0.01
RP03
0.01
FT08
0.01
AB64
0.01
AB76
0.01
AB01
0.01
CR60
0.02
RP05
0.02
RP01
0.02
AB79
0.02
CR56
0.03
CR59
0.03
KC37
0.03
KC29
0.04
KC21
0.04
KC33
0.04
FT09
0.04
KC35
0.04
CW06
0.04
KC16
0.04
KC36
0.05
CR57
0.05
KC34
0.05
KC07
0.06
AB17
0.06
AB80
0.07
CR50
0.07
AB77
0.07
KC13
0.07
CR53
0.07
KC14
0.07
KC17
0.07
KC18
0.08
KC28
0.08
KC23
0.08
KC22
0.08
KC25
0.09
KC05
0.09
CR58
0.09
CW05
0.09
KC20
0.09
KC24
0.09
KC30
0.09
CR51
0.10
KC31
0.10
KC26
0.10
KC15
0.10
CW01
0.12
KC19
0.12
KC38
0.16
KC06
0.29
AB78
0.31
PB13
0.39
PB29
0.48
PB26
0.73
UB02
0.85
PB12
1.36
PB67
1.42
PB76
1.55
PB09
1.76
AB50
1.92
PB20
2.05
PB08
2.11
PB27
2.16
PB06
2.24
PB21
2.34
PB07
2.44
AB74
2.55
PB55
2.65
PB72
3.17
PB69
3.20
PB59
3.29
AB67
3.30
PB04
3.31
PB68
3.32
PB75
3.35
AB73
3.40
PB70
3.40
AB16
3.44
AB62
3.54
AB05
3.82
PB18
3.91
PB54
3.94
AB57
3.98
AB65
4.09
AB51
4.14
AB63
4.17
PB71RP
4.21
CR54
4.26
AB04
4.28
AB66
4.46
AB81
4.48
AB53
4.48
AB68
4.48
AB75
4.62
AB21
4.63
AB59
4.74
AB60
4.64
AB70
4.87
AB58
4.88
AB13
4.96
AB24
5.31
COTTON,S HIRES AND ASSOCIATES, INC.
CONSULTING ENGINEERS AND GEOLOGISTS
RANCHO PALOS VERDES, CALIFORNIA
SC6163
POS
MP
January 14, 2025
1"=500'
FIGURE NO.
PROJECT NO.
DATE
SCALE
APPROVED BY
GEO/ENG BY
GPS MONITORING DISPLACEMENT RATE
CONTOUR MAP (1/7/25 DATA)
1
Abalone Cove, Portuguese Bend, Klondike Canyon
Hillshade basemap produced from publicly available LiDAR:
"2015 - 2016 LARIAC Lidar DEM: Los Angeles Region, CA"
CREST ROAD
C-1
• \
,, -....) ✓ ---
--------r J -
.,..,-_.,,,,_
.,,
= -
♦ ♦"'-
♦
I
■
■
■
■
■
■
■
■
■
■
■
·-
-
.. °">
r
-"-
I ·/ ...
5.0
I I
' ; J / '
/ I
♦ I
,,
I I \
• . ~ ;;!-,
•
\
-1/ ~ -
---♦ r -♦
·,
•
--
.,;.;
I
, J
, ,.,
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
PALOS VERDES DRIVE SOUTH
BURMA
ROAD
EXPLANATION
Limits of the Ancient Portuguese Bend Landslide Complex
Limits of Historically Mapped Landslides
2023/2024 Landslide Features
(based on CSA field mapping)
SEAVIEW TRACT
Limits of 2023-2024 Major Landslide Movement
(based on CSA field mapping and bathymetry survey)
LIMITS OF 2023-2024
MAJOR LANDSLIDE
MOVEMENT
GPS Monument Displacement Rate
(October 29, 2024 to December 3, 2024)
Displacement Vector Scale 1"= 8"/week
Displacement Rate Table
Minimum Rate
(inch/week)
2.00
3.00
4.00
5.00
6.00
7.00
8.00
9.00
Maximum Rate
(inch/week)
3.00
4.00
5.00
6.00
7.00
8.00
9.00
10.00
Color
10.00 11.00
11.00 12.00
1.00 2.00
12.00 13.00
0.00 1.00
RP03
0.03
APPROXIMATE BOUNDARY OF
ANCIENT PORTUGUESE BEND
LANDSLIDE COMPLEX
AB01
0.05
AB17
0.03
AB64
0.09
AB77
0.04
AB78
0.15
AB79
0.02
AB80
0.04
CR53
0.14
CR56
0.05
CR57
0.06
CR59
0.07
CW01
0.02
CW05
0.07
CW06
0.07
CW08
0.09
FT08
0.07
FT09
0.06
FT10
0.08
KC06
0.06
KC07
0.04
KC13
0.04
KC14
0.02
KC15
0.06
KC16
0.04
KC19
0.08
KC20
0.06
KC21
0.03
KC23
0.04
KC24
0.05
KC25
0.06
KC26
0.02KC28
0.06
KC29
0.08
KC33
0.10
KC34
0.04
KC35
0.05
KC36
0.02
KC37
0.06
KC38
0.10
AB04
4.41
AB13
5.32
AB16
3.84
AB21
4.52
AB24
5.73
AB50
2.27
AB51
4.63
AB53
4.83
AB57
4.12
AB58
4.97
AB59
5.13
AB60
4.80
AB62
3.77
AB63
4.56
AB65
4.46
AB66
4.90
AB67
3.57
AB68
4.83
AB70
5.47
AB73
3.37
AB74
2.80
AB75
4.52
AB76
0.13
CR50
0.13 CR51
0.16
CR54
4.46
CR58
0.14
CR60
0.17
KC05
0.11
KC17
0.14
KC18
0.16 KC22
0.11
KC30
0.17
KC31
0.17
PB04
3.41 PB06
2.45
PB07
2.54 PB08
2.13
PB09
1.76
PB12
1.23
PB13
0.39
PB18
4.25
PB20
1.93
PB21
2.31
PB26
0.77
PB27
1.98
PB29
0.49
PB54
4.16
PB55
2.25
PB59
3.46
PB67
1.32PB68
3.43
PB69
3.15PB70
3.50
PB71RP
4.07
PB72
3.31
PB74
1.10
PB75
3.57
PB76
1.43
UB02
0.87
BEACH CLUB
LANSDSLIDE
COTTON,S HIRES AND ASSOCIATES, INC.
CONSULTING ENGINEERS AND GEOLOGISTS
RANCHO PALOS VERDES, CALIFORNIA
SC6163
POS
MP
December 12, 2024
1"=500'
FIGURE NO.
PROJECT NO.
DATE
SCALE
APPROVED BY
GEO/ENG BY
GPS MONITORING DISPLACEMENT RATE
CONTOUR MAP (12/03/24 DATA)
1
Abalone Cove, Portuguese Bend, Klondike Canyon
Hillshade basemap produced from publicly available LiDAR:
"2015 - 2016 LARIAC Lidar DEM: Los Angeles Region, CA"
C-2
,, -....) ✓ ---
--------J -
.,..,-_.,,,,_
.,,
= -
• \
r ♦
I
I , ·-~"">
■
■
■
■
■
■
■
■
■
■
■
1"'
™" "-
. ,· •.
I \
' ; J / '
/ I
♦ I
,,
. •
\
1/
---♦ r . ♦
r --..-
.,;.;
I
I
....
-
---
I I \
• ~ ~
-~ -·,
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.,, /
/
~-
/
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/ ♦ -
/ J -
I -i , J
(_ -
----___,.i r / /
1*
♦ ,,.,.....
-i ◄ --• -
✓
, ,.,
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
PALOS VERDES DRIVE SOUTH
BURMA
ROAD
EXPLANATION
Limits of the Ancient Portuguese Bend Landslide Complex
Limits of Historically Mapped Landslides
2023/2024 Landslide Mapping
SEAVIEW TRACT
Current Limits of Major
Landslide Movement (March
2024)
CURRENT LIMITS OF
MAJOR LANDSLIDE
MOVEMENT (MARCH 2024)
GPS Monument
Displacement Rate
(October 8, 2024 to
October 29, 2024)
Displacement Vector
Scale 1"= 8"/week
Displacement Rate Table
Minimum Rate
(inch/week)
2.00
3.00
4.00
5.00
6.00
7.00
8.00
9.00
Maximum Rate
(inch/week)
3.00
4.00
5.00
6.00
7.00
8.00
9.00
10.00
Color
10.00 11.00
11.00 12.00
1.00 2.00
12.00 13.00
0.00 1.00
UB02
0.68
UB02
0.68
UB02
0.68
UB02
0.68
UB02
0.68
UB02
0.68
UB02
0.68
UB02
0.68
UB02
0.68
UB02
0.68
UB02
0.68
UB02
0.68
UB02
0.68
UB02
0.68
UB02
0.68
UB02
0.68
UB02
0.68
UB02
0.68
UB02
0.68
UB02
0.68
UB02
0.68
UB02
0.68
UB02
0.68
UB02
0.68
UB02
0.68
UB02
0.68
UB02
0.68
UB02
0.68
UB02
0.68
UB02
0.68
UB02
0.68
UB02
0.68
UB02
0.68
UB02
0.68
UB02
0.68
UB02
0.68
UB02
0.68
UB02
0.68
UB02
0.68
UB02
0.68
UB02
0.68
UB02
0.68
UB02
0.68
UB02
0.68
UB02
0.68
UB02
0.68
UB02
0.68
UB02
0.68
UB02
0.68
UB02
0.68
UB02
0.68
UB02
0.68
UB02
0.68
UB02
0.68
UB02
0.68
UB02
0.68
AB01
0.13
AB04
4.32
AB13
5.32
AB16
3.91
AB17
0.09
AB21
4.63
AB24
5.64
AB50
2.07
AB51
4.17
AB53
4.51
AB57
4.83
AB58
5.10
AB59
5.04
AB60
5.29
AB62
3.64
AB63
4.37
AB64
0.62
AB65
4.21
AB66
4.74
AB67
3.61
AB68
4.72
AB70
5.46
AB73
3.53
AB74
3.06
AB75
4.70
AB76
0.11
AB77
0.06
AB78
0.13
AB79
0.12
AB80
0.07
CR50
0.08 CR51
0.10
CR53
0.01
CR54
4.68
CR56
0.04
CR57
0.09
CR58
0.07
CR59
0.08
CR60
0.03
CW01
0.02
CW05
0.08
CW06
0.08
CW08
0.16
FT08
0.04
FT09
0.06
FT10
0.07
KC05
0.19
KC06
0.22
KC07
0.11
KC13
0.12
KC14
0.11
KC15
0.19
KC16
0.13
KC17
0.11
KC18
0.14
KC19
0.28
KC20
0.16
KC21
0.04
KC22
0.19
KC23
0.20
KC24
0.11
KC25
0.09
KC26
0.08KC28
0.17
KC29
0.12
KC30
0.16
KC31
0.22
KC33
0.24
KC34
0.14
KC35
0.12
KC36
0.10
KC37
0.16
KC38
0.22
PB04
3.25
PB06
2.21
PB07
2.46 PB08
1.97
PB09
1.67
PB12
1.28
PB13
0.38
PB18
4.01
PB20
2.03
PB21
2.48
PB26
0.56
PB27
2.08
PB29
0.36
PB54
4.23
PB55
2.88
PB59
3.38
PB67
1.14PB68
3.25
PB69
3.63PB70
3.47
PB71
4.36
PB72
3.22
PB74
0.97
PB75
3.49
PB76
1.55
RP01
0.11
RP03
0.01
UB02
0.68
APPROXIMATE BOUNDARY OF
ANCIENT PORTUGUESE BEND
LANDSLIDE COMPLEX
COTTON,S HIRES AND ASSOCIATES, INC.
CONSULTING ENGINEERS AND GEOLOGISTS
RANCHO PALOS VERDES, CALIFORNIA
SC6163
POS
MP
November 8, 2024
1"=500'
FIGURE NO.
PROJECT NO.
DATE
SCALE
APPROVED BY
GEO/ENG BY
GPS MONITORING DISPLACEMENT RATE
CONTOUR MAP (10/29/24 DATA)
1
Abalone Cove, Portuguese Bend, Klondike Canyon
Hillshade basemap produced from publicly available LiDAR:
"2015 - 2016 LARIAC Lidar DEM: Los Angeles Region, CA"
C-3
♦
' ; J / '
/ I
♦ I
,,
I I •
-~ 1/
♦ -
...
I
·,
• ---♦ r
.... r
i
I .
......-..._. .. I
,, -....) ✓ -
------
__,,.
• ■
■
, J
■
■
■
■
■
■
■
■
■
■
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
PALOS VERDES DRIVE SOUTH
BURMA
ROAD
EXPLANATION
Limits of the Ancient Portuguese Bend Landslide Complex
Limits of Historically Mapped Landslides
2023/2024 Landslide Mapping
SEAVIEW TRACT
Current Limits of Major
Landslide Movement (March
2024)
CURRENT LIMITS OF
MAJOR LANDSLIDE
MOVEMENT (MARCH 2024)
GPS Monument
Displacement Rate
(September 4, 2024 to
October 8, 2024)
Displacement Vector
Scale 1"= 8"/week
"Creeping Area"
Approximately 0.5 inch/week
Displacement Rate Table
Minimum Rate
(inch/week)
2.00
3.00
4.00
5.00
6.00
7.00
8.00
9.00
Maximum Rate
(inch/week)
3.00
4.00
5.00
6.00
7.00
8.00
9.00
10.00
Color
10.00 11.00
11.00 12.00
1.00 2.00
12.00 13.00
0.00 1.00
AB01
0.05
AB04
6.09
AB13
7.23
AB16
5.42
AB17
0.04
AB21
7.29
AB24
7.88
AB50
3.88
AB51
6.18
AB53
7.37
AB57
6.17
AB58
7.44
AB59
7.90
AB60
6.74
AB62
5.03
AB63
6.23
AB64
0.17
AB65
6.14
AB66
6.91
AB67
5.09
AB68
6.82
AB70
7.85
AB73
6.04
AB74
3.86
AB75
7.18
AB76
0.11
AB77
0.06
AB78
1.78
AB79
0.04
AB80
0.04
CR50
0.35 CR51
0.44
CR53
0.43
CR54
6.85
CR56
0.07
CR57
0.11
CR58
0.36
CR59
0.03
CR60
0.00
CW01
0.03
CW05
0.47
CW06
0.07
CW08
0.02
FT08
0.03
FT09
0.04
FT10
0.03
KC05
1.05
KC06
1.57
KC07
0.04
KC13
0.55
KC14
0.05
KC15
1.53
KC16
0.02
KC17
1.34
KC18
2.49 KC19
1.35
KC20
1.29
KC21
0.04
KC22
1.80
KC23
1.05
KC24
1.75
KC25
0.08
KC26
1.34KC28
1.98
KC29
2.27
KC30
3.33
KC31
3.23
KC33
1.67
KC34
0.05
KC35
0.05
KC36
0.03
KC37
0.04
KC38
2.47
PB04
5.74
PB06
4.58
PB07
5.11 PB08
4.62 PB09
4.08
PB12
4.21
PB13
3.04
PB18
6.95
PB20
4.99
PB21
4.96
PB26
4.01
PB27
5.05
PB29
3.42
PB54
6.99
PB55
5.26
PB59
5.88
PB67
4.63PB68
5.71
PB69
5.64PB70
6.03
PB71
7.08
PB72
5.77
PB74
4.54
PB75
6.28
PB76
3.84
RP01
0.04
RP03
0.00
UB02
3.74
UB02
3.74
UB02
3.74
UB02
3.74
UB02
3.74
UB02
3.74
UB02
3.74
UB02
3.74
UB02
3.74
UB02
3.74
UB02
3.74
UB02
3.74
UB02
3.74
UB02
3.74
UB02
3.74
UB02
3.74
UB02
3.74
UB02
3.74
UB02
3.74
UB02
3.74
UB02
3.74
UB02
3.74
UB02
3.74
UB02
3.74
UB02
3.74
UB02
3.74
UB02
3.74
UB02
3.74
UB02
3.74
UB02
3.74
UB02
3.74
UB02
3.74
UB02
3.74
UB02
3.74
UB02
3.74
UB02
3.74
UB02
3.74
UB02
3.74
UB02
3.74
UB02
3.74
UB02
3.74
UB02
3.74
UB02
3.74
UB02
3.74
UB02
3.74
UB02
3.74
UB02
3.74
UB02
3.74
UB02
3.74
UB02
3.74
UB02
3.74
UB02
3.74
UB02
3.74
UB02
3.74
UB02
3.74
UB02
3.74
UB02
3.74
APPROXIMATE BOUNDARY OF
ANCIENT PORTUGUESE BEND
LANDSLIDE COMPLEX
COTTON,S HIRES AND ASSOCIATES, INC.
CONSULTING ENGINEERS AND GEOLOGISTS
RANCHO PALOS VERDES, CALIFORNIA
SC6163
POS
MP
November 8, 2024
1"=500'
FIGURE NO.
PROJECT NO.
DATE
SCALE
APPROVED BY
GEO/ENG BY
GPS MONITORING DISPLACEMENT RATE
CONTOUR MAP (10/8/24 DATA)
2
Abalone Cove, Portuguese Bend, Klondike Canyon
Hillshade basemap produced from publicly available LiDAR:
"2015 - 2016 LARIAC Lidar DEM: Los Angeles Region, CA"
C-4
~r--"·--~
__,,... ✓~ -
., ,,,...,,,,.. ✓ .,. ,.,.,.,.
----....J -
__,,.
•
.,,
---J -
-----_.,,,,_
-
♦
I
I
\
'
■
■
■
■
■
■
■
■
■
■
■
■
r
r ....
.....---. ..
6.0 I I
♦
.,,
,,
--:....., ,,,
♦
,_ -1•
---
I I
I
/
/ ~-
/ -z
0
/ ♦'
~
::J" I/
♦
J -
I / (_ --1
___,.i r ----/ /
,
J
♦ _.,,...
..... -i -• ♦ ,
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
PALOS VERDES DRIVE SOUTH
BURMA
ROAD
EXPLANATION
Limits of the Ancient Portuguese Bend Landslide Complex
Limits of Historically Mapped Landslides
2023/2024 Landslide Mapping
SEAVIEW TRACT
Current Limits of Major
Landslide Movement (March
2024)
CURRENT LIMITS OF
MAJOR LANDSLIDE
MOVEMENT (MARCH 2024)
GPS Monument
Displacement Rate
(August 1, 2024 to
September 4, 2024)
Displacement Vector
Scale 1"= 8"/week
AB04
8.20
AB16
7.30
AB17
0.00
AB21
10.90
AB50
6.20
AB53
10.70
AB57
9.10
AB59
11.70
AB60
9.70
AB62
6.70
AB63
8.10
AB64
0.30
AB66
9.70
AB67
6.80
AB70
11.00
AB73
9.40
AB74
5.30
AB75
10.60
AB76
0.20
AB77
0.00
CR50
0.50
CR53
0.60
CR54
10.70
KC05
2.00
KC06
3.60
KC14
0.10
KC16
0.00
KC17
2.70
KC19
3.10
KC21
0.10KC22
4.00
KC23
2.40
KC24
4.60
KC28
4.70
KC31
7.50
KC33
3.70
KC36
0.10
PB07
9.60
PB09
7.90
PB13
8.50
PB18
11.00
PB20
10.50
PB21
10.40
PB26
9.20
PB29
8.30
PB59
9.70
AB01
0.10
AB02
0.10
AB13
10.10
AB24
10.80
AB51
8.60
AB58
10.40
AB65
8.40
AB68
9.40
CR51
0.60CR56
0.10
CW01
0.00
CW05
0.60
CW06
0.00
CW07
0.00
CW08
0.10
FT06
8.00
FT08
0.00
FT09
0.10
KC07
0.10
KC13
1.30
KC15
3.40
KC18
6.80
KC20
2.60
KC25
0.20
KC26
3.50
KC29
5.50
KC30
7.70
KC34
0.00
KC35
0.00
KC37
0.10
PB04
9.20 PB06
8.00
PB08
8.70
PB12
10.80
PB27
10.70
PB54
10.90
PB55
10.30
PB67
10.10PB68
9.30
PB69
9.60
PB70
10.00
PB71
11.40
PB72
9.80
PB74
9.70
PB75
10.60
RP01
0.00
RP02
0.00
UB02
8.20
"Creeping Area"
Approximately 0.5 inch/week
Displacement Rate Table
Minimum Rate
(inch/week)
2.00
3.00
4.00
5.00
6.00
7.00
8.00
9.00
Maximum Rate
(inch/week)
3.00
4.00
5.00
6.00
7.00
8.00
9.00
10.00
Color
10.00 11.00
11.00 12.00
1.00 2.00
12.00 13.00
0.00 1.00
APPROXIMATE BOUNDARY OF
ANCIENT PORTUGUESE BEND
LANDSLIDE COMPLEX
COTTON,S HIRES AND ASSOCIATES, INC.
CONSULTING ENGINEERS AND GEOLOGISTS
RANCHO PALOS VERDES, CALIFORNIA
SC6163
POS
MP
September 25, 2024
1"=500'
FIGURE NO.
PROJECT NO.
DATE
SCALE
APPROVED BY
GEO/ENG BY
GPS MONITORING DISPLACEMENT RATE
CONTOUR MAP (9/4/24 DATA)
3
Abalone Cove, Portuguese Bend, Klondike Canyon
Hillshade basemap produced from publicly available LiDAR:
"2015 - 2016 LARIAC Lidar DEM: Los Angeles Region, CA"
C-5
I I
I r ....
r
~---_____ ...,, i
---J -♦
.,..,-_.,,,,_
.,,
/
~-
__,,.
■
■
,._ l --...... --l --
.... -----~------------~ ------
/ z
0 ~
::J"
J -
I (_ --
-1
___,.i r ----/ /
,
J
■
_.,.....
■
_.
■ --i
■
■
■
-• ♦
✓
■
■
■
■
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
APPROXIMATE BOUNDARY OF
ANCIENT PORTUGUESE BEND
LANDSLIDE COMPLEX
BURMA ROAD
PALOS VERDES DRIVE SOUTH
EXPLANATION
Limits of the Ancient Portuguese Bend Landslide Complex
Limits of Historically Mapped Landslides
2023/2024 Landslide Mapping
SEAVIEW TRACT
Current Limits of Major
Landslide Movement (March
2024)
CURRENT LIMITS OF
MAJOR LANDSLIDE
MOVEMENT (MARCH 2024)
GPS Monument Displacement
Rate (July 1, 2024 to August 1,
2024) Displacement Vector
Scale 1"= 8"/week
Displacement Rate Table
Minimum Rate
(inch/week)
2.00
3.00
4.00
5.00
6.00
7.00
8.00
9.00
Maximum Rate
(inch/week)
3.00
4.00
5.00
6.00
7.00
8.00
9.00
10.00
Color
10.00 11.00
11.00 12.00
1.00 2.00
AB04
9.20
AB13
10.64
AB16
7.49
AB17
0.01
AB24
11.23
AB51
8.95
AB53
11.29
AB58
11.00
AB59
12.65
AB60
10.19
AB62
7.08
AB63
9.11
AB65
8.88
AB66
10.10
AB68
9.79
AB70
11.69
AB71 no data
0.00
AB73
10.75
AB74
5.16
AB75
11.99
AB76
0.24
CR07 no data
0.00
CR50
0.33
CW08
0.05
FT06
9.37
KC05
2.41
KC07
0.03
KC13
1.46
KC15
3.91
KC17
3.53
KC18
7.84
KC19
3.40
KC20
3.45
KC23
2.72
KC26
4.09
KC27
3.88
KC30
9.21
PB06
10.07
PB08
10.84
PB12
11.45
PB13
8.82
PB18
11.89
PB20
10.83
PB21
10.41
PB27
10.91
PB55
11.13
PB59
11.36
PB67
12.29PB68
11.15
PB69
11.13PB70
11.58
PB71
12.96
PB72
11.81
PB73
9.39
PB74
11.39
PB75
11.54
RP01
0.02
RP02
0.03
UB02
9.98
AB01
0.06
AB02
0.06
AB05
8.55
AB21
12.43
AB50
6.86
AB57
9.39
AB64
0.48
AB67
7.48
AB77
0.08
CR51
0.47
CR53
0.49
CR54
11.80
CR56
0.07
CW01
0.06
CW05
0.52
CW06
0.05
CW07
0.04
FT08
0.02
FT09
0.01
KC06
3.89
KC14
0.08
KC16
0.03
KC21
0.04KC22
4.09
KC24
5.16
KC25
0.23
KC28
5.60
KC29
6.48
KC31
8.23
KC33
3.84
PB04
11.34
PB07
11.68 PB09
9.92
PB26
9.87
PB29
9.36
PB54
11.89
"Creeping Area"
Approximately 0.5 inch/week
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?
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?
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12.00 13.00
0.00 1.00
COTTON,S HIRES AND ASSOCIATES, INC.
CONSULTING ENGINEERS AND GEOLOGISTS
RANCHO PALOS VERDES, CALIFORNIA
SC6163
POS
MP
August 18, 2024
1"=500'
FIGURE NO.
PROJECT NO.
DATE
SCALE
APPROVED BY
GEO/ENG BY
GPS MONITORING DISPLACEMENT RATE
CONTOUR MAP (8/1/24 DATA)
4
Abalone Cove, Portuguese Bend, Klondike Canyon
Hillshade basemap produced from publicly available LiDAR:
"2015 - 2016 LARIAC Lidar DEM: Los Angeles Region, CA"
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GPS Monitoring Points
Horizontal Movement Velocities (feet/month)
Dewatering Impact: PBL (Sacred Cove Area) and ACL (Abalone Cove)
August 1, 2024 -January 7, 2025
PB04 PB70 AB50 AB62 AB63
Start of Emergency
Dewatering Wells
pumping of deep
artesian water at PBL
beach (9/13/24)
(DDW1-DDW6)
DD
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COTTON,SHIRES ANDASSOCIATES, INC.
CONSULTING ENGINEERS AND GEOLOGISTS
),*85(
PROJECT NO.
DATE
SCALE
APPROVED BY
GEO/ENG BY
GPS Monitoring Points
Horizontal Movement Velocities
Dewatering Impact: PBL (Sacred Cove Area) and ACL
August 1, 2024- January 7, 2025
MP SC6163
POS January 2025D-1
r -----------------------------------------►
0
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4
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(
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/
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)
Date
GPS Monitoring Points
Horizontal Movement Velocities (feet/month)
Dewatering Impact: PBL (Sacred Cove Area) and ACL (Abalone Cove)
August 1, 2024 -January 7, 2025
PB04 PB70 AB50 AB62 AB63
Start of Emergency
Dewatering Wells
pumping of deep
artesian water at PBL
beach (9/13/24)
(DDW1-DDW6)
DD
W
-7
s
t
a
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p
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-9
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p
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p
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-11
st
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p
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p
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0
1
2
3
4
5
8/
1
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0
2
4
9/
1
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0
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4
10
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1
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0
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4
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/
1
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0
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4
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0
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l
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c
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(
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/
m
o
n
t
h
)
Date
GPS Monitoring Points
Horizontal Movement Velocities (feet/month)
Dewatering Impact: PBL (West Central, East Central & Seaward Subslide Areas Only)
August 1, 2024 -January 7, 2025
PB06 PB07 PB08 PB09 PB12 PB13 PB74 UB02 PB63/64/67
Start of Emergency
Dewatering Wells
pumping of deep
artesian water at PBL
beach (9/13/24)
(DDW1-DDW6)
PB67,PB74
and UB02
(closest to
DDWs 1-6)
COTTON,SHIRES ANDASSOCIATES, INC.
CONSULTING ENGINEERS AND GEOLOGISTS
),*85(
PROJECT NO.
DATE
SCALE
APPROVED BY
GEO/ENG BY
GPS Monitoring Points
Horizontal Movement Velocities
Dewatering Impact
PBL (West Central, East Central, and Seaward Subslide Areas Only)
August 1, 2024- January 7, 2025
MP SC6163
POS January 2025
GPS Monitoring Points
Horizontal Movement Velocities
ewatering Impact: PBL (Sacred Cove Area) and ACL
August 1, 2024- January 7, 2025
D-2
---
r r -----------------------------------------~
0
1
2
3
4
5
8/
1
/
2
0
2
4
9/
1
/
2
0
2
4
10
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1
/
2
0
2
4
11
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)
Date
GPS Monitoring Points
Horizontal Movement Velocities (feet/month)
Dewatering Impact: PBL (Sacred Cove Area) and ACL (Abalone Cove)
August 1, 2024 -January 7, 2025
PB04 PB70 AB50 AB62 AB63
Start of Emergency
Dewatering Wells
pumping of deep
artesian water at PBL
beach (9/13/24)
(DDW1-DDW6)
DD
W
-7
s
t
a
r
t
s
p
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m
p
i
n
g
DD
W
-8
s
t
a
r
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p
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m
p
i
n
g
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W
-10
s
t
a
r
t
s
p
u
m
p
i
n
g
DD
W
-9
s
t
a
r
t
s
p
u
m
p
i
n
g
DD
W
-9
p
i
n
c
h
e
d
of
f
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W
-9a
st
a
r
t
s
p
u
m
p
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n
g
DD
W
-11
st
a
r
t
s
p
u
m
p
i
n
g
0
1
2
3
4
5
8/
1
/
2
0
2
4
9/
1
/
2
0
2
4
10
/
1
/
2
0
2
4
11
/
1
/
2
0
2
4
12
/
1
/
2
0
2
4
1/
1
/
2
0
2
5
2/
1
/
2
0
2
5
Mo
v
e
m
e
n
t
V
e
l
o
c
i
t
y
(
f
e
e
t
/
m
o
n
t
h
)
Date
GPS Monitoring Points
Horizontal Movement Velocities (feet/month)
Dewatering Impact: PBL (West Central, East Central & Seaward Subslide Areas Only)
August 1, 2024 -January 7, 2025
PB06 PB07 PB08 PB09 PB12 PB13 PB74 UB02 PB63/64/67
Start of Emergency
Dewatering Wells
pumping of deep
artesian water at PBL
beach (9/13/24)
(DDW1-DDW6)
PB67,PB74
and UB02
(closest to
DDWs 1-6)
0
1
2
3
4
5
8/
1
/
2
0
2
4
9/
1
/
2
0
2
4
10
/
1
/
2
0
2
4
11
/
1
/
2
0
2
4
12
/
1
/
2
0
2
4
1/
1
/
2
0
2
5
2/
1
/
2
0
2
5
Mo
v
e
m
e
n
t
V
e
l
o
c
i
t
y
(
f
e
e
t
/
m
o
n
t
h
)
Date
GPS Monitoring Points
Horizontal Movement Velocities (feet/month)
Dewatering Impact: Klondike Canyon Landslide Only
August 1, 2024 -January 7, 2025
KC17 KC13 KC15 KC31
Start of Emergency
Dewatering Wells
pumping of deep
artesian water at PBL
beach (9/13/24)
DDW1-DDW6
KC13,KC15, KC17, KC31
No horizontal
displacement since
10/13/2024
COTTON,SHIRES ANDASSOCIATES, INC.
CONSULTING ENGINEERS AND GEOLOGISTS
),*85(
PROJECT NO.
DATE
SCALE
APPROVED BY
GEO/ENG BYMP SC6163
POS January 2025
GPS Monitoring Points
Horizontal Movement Velocities
Dewatering Impact: Klondike Canyon Landslide Only
August 1, 2024 - January 7, 2025
D-3
------------------------------------------► ------------~~--------'
II
0
1
2
3
4
5
8/
1
/
2
0
2
4
9/
1
/
2
0
2
4
10
/
1
/
2
0
2
4
11
/
1
/
2
0
2
4
12
/
1
/
2
0
2
4
1/
1
/
2
0
2
5
2/
1
/
2
0
2
5
Mo
v
e
m
e
n
t
V
e
l
o
c
i
t
y
(
f
e
e
t
/
m
o
n
t
h
)
Date
GPS Monitoring Points
Horizontal Movement Velocities (feet/month)
Dewatering Impact: PBL (Sacred Cove Area) and ACL (Abalone Cove)
August 1, 2024 -January 7, 2025
PB04 PB70 AB50 AB62 AB63
Start of Emergency
Dewatering Wells
pumping of deep
artesian water at PBL
beach (9/13/24)
(DDW1-DDW6)
DD
W
-7
s
t
a
r
t
s
p
u
m
p
i
n
g
DD
W
-8
s
t
a
r
t
s
p
u
m
p
i
n
g
DD
W
-10
s
t
a
r
t
s
p
u
m
p
i
n
g
DD
W
-9
s
t
a
r
t
s
p
u
m
p
i
n
g
DD
W
-9
p
i
n
c
h
e
d
of
f
DD
W
-9a
st
a
r
t
s
p
u
m
p
i
n
g
DD
W
-11
st
a
r
t
s
p
u
m
p
i
n
g
0
1
2
3
4
5
8/
1
/
2
0
2
4
9/
1
/
2
0
2
4
10
/
1
/
2
0
2
4
11
/
1
/
2
0
2
4
12
/
1
/
2
0
2
4
1/
1
/
2
0
2
5
2/
1
/
2
0
2
5
Mo
v
e
m
e
n
t
V
e
l
o
c
i
t
y
(
f
e
e
t
/
m
o
n
t
h
)
Date
GPS Monitoring Points
Horizontal Movement Velocities (feet/month)
Dewatering Impact: PBL (West Central, East Central & Seaward Subslide Areas Only)
August 1, 2024 -January 7, 2025
PB06 PB07 PB08 PB09 PB12 PB13 PB74 UB02 PB63/64/67
Start of Emergency
Dewatering Wells
pumping of deep
artesian water at PBL
beach (9/13/24)
(DDW1-DDW6)
PB67,PB74
and UB02
(closest to
DDWs 1-6)
0
1
2
3
4
5
8/
1
/
2
0
2
4
9/
1
/
2
0
2
4
10
/
1
/
2
0
2
4
11
/
1
/
2
0
2
4
12
/
1
/
2
0
2
4
1/
1
/
2
0
2
5
2/
1
/
2
0
2
5
Mo
v
e
m
e
n
t
V
e
l
o
c
i
t
y
(
f
e
e
t
/
m
o
n
t
h
)
Date
GPS Monitoring Points
Horizontal Movement Velocities (feet/month)
Dewatering Impact: Klondike Canyon Landslide Only
August 1, 2024 -January 7, 2025
KC17 KC13 KC15 KC31
Start of Emergency
Dewatering Wells
pumping of deep
artesian water at PBL
beach (9/13/24)
DDW1-DDW6
KC13,KC15, KC17, KC31
No horizontal
displacement since
10/13/2024
0
1
2
3
4
5
8/
1
/
2
0
2
4
9/
1
/
2
0
2
4
10
/
1
/
2
0
2
4
11
/
1
/
2
0
2
4
12
/
1
/
2
0
2
4
1/
1
/
2
0
2
5
2/
1
/
2
0
2
5
Mo
v
e
m
e
n
t
V
e
l
o
c
i
t
y
(
f
e
e
t
/
m
o
n
t
h
)
Date
GPS Monitoring Points
Horizontal Movement Velocities (feet/month)
Dewatering Impact: ACL/PBL/KCL Comparison
August 1, 2024 -January 7, 2025
PB04 PB06 PB07 PB08 PB09 PB12 PB13 PB70 PB74 UB02 AB50 AB62 AB63 PB63/64/67 KC13 KC15 KC17 KC31
Start of Emergency
Dewatering Wells
pumping of deep
artesian water at PBL
beach (9/13/24)
(DDW1-DDW6)
KC13,KC15, KC17, KC31
No horizontal movement
since 10/13/2024
PB67,PB74
and UB02
(closest to
DDWs 1-6)
DD
W
-7
s
t
a
r
t
s
p
u
m
p
i
n
g
DD
W
-8
s
t
a
r
t
s
p
u
m
p
i
n
g
DD
W
-10
s
t
a
r
t
s
p
u
m
p
i
n
g
DD
W
-9
s
t
a
r
t
s
p
u
m
p
i
n
g
DD
W
-9
p
i
n
c
h
e
d
of
f
DD
W
-9a
s
t
a
r
t
s
p
u
m
p
i
n
g
DD
W
-11
s
t
a
r
t
s
p
u
m
p
i
n
g
0
1
2
3
4
5
10
/
1
/
2
0
2
3
11
/
1
/
2
0
2
3
12
/
1
/
2
0
2
3
1/
1
/
2
0
2
4
2/
1
/
2
0
2
4
3/
1
/
2
0
2
4
4/
1
/
2
0
2
4
5/
1
/
2
0
2
4
6/
1
/
2
0
2
4
7/
1
/
2
0
2
4
8/
1
/
2
0
2
4
9/
1
/
2
0
2
4
10
/
1
/
2
0
2
4
11
/
1
/
2
0
2
4
12
/
1
/
2
0
2
4
1/
1
/
2
0
2
5
2/
1
/
2
0
2
5
Mo
v
e
m
e
n
t
V
e
l
o
c
i
t
y
(
f
e
e
t
/
m
o
n
t
h
)
Date
GPS Monitoring Points
Horizontal Movement Velocities--PB points vs. AB points (feet/month)
October 10, 2023 -January 7, 2025
PB06 PB07 PB08 PB09 PB12 PB13 PB74 UB02 AB50 AB62 AB63 PB63/64/67
0.00
1.00
2.00
3.00
4.00
5.00
10
/
1
/
2
0
1
6
10
/
1
/
2
0
1
7
10
/
1
/
2
0
1
8
10
/
1
/
2
0
1
9
10
/
1
/
2
0
2
0
10
/
1
/
2
0
2
1
10
/
1
/
2
0
2
2
10
/
1
/
2
0
2
3
10
/
1
/
2
0
2
4
Mo
v
e
m
e
n
t
V
e
l
o
c
i
t
y
(
f
e
e
t
/
m
o
n
t
h
)
Date
GPS Monitoring Points
Horizontal Movement Velocities--PBL Central/Upper Points vs. ACL Points (feet/month)
October 2016 -January 7, 2025
PB07 PB12 PB13 PB18 PB26 UB02 AB62 AB63 PB63/64/67
0.00
1.00
2.00
3.00
4.00
5.00
10
/
1
/
2
0
0
8
10
/
1
/
2
0
0
9
10
/
1
/
2
0
1
0
10
/
1
/
2
0
1
1
10
/
1
/
2
0
1
2
10
/
1
/
2
0
1
3
10
/
1
/
2
0
1
4
10
/
1
/
2
0
1
5
10
/
1
/
2
0
1
6
10
/
1
/
2
0
1
7
10
/
1
/
2
0
1
8
10
/
1
/
2
0
1
9
10
/
1
/
2
0
2
0
10
/
1
/
2
0
2
1
10
/
1
/
2
0
2
2
10
/
1
/
2
0
2
3
10
/
1
/
2
0
2
4
Mo
v
e
m
e
n
t
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l
o
c
i
t
y
(
f
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/
m
o
n
t
h
)
Date
GPS Monitoring Points
Horizontal Movement Velocities--PBL Central/Upper points vs. ACL points(feet/month)
September 2007 -January 7, 2025
PB07 PB12 PB13 PB18 PB26 UB02 AB62 AB63 PB63/64/67
0
20
40
60
80
100
120
1400
1
2
3
4
5
8/
1
/
2
0
2
4
9/
1
/
2
0
2
4
10
/
1
/
2
0
2
4
11
/
1
/
2
0
2
4
12
/
1
/
2
0
2
4
1/
1
/
2
0
2
5
2/
1
/
2
0
2
5
Wa
t
e
r
De
p
t
h
(
f
e
e
t
)
Mo
v
e
m
e
n
t
ȱVe
l
o
c
i
t
y
ȱ(f
e
e
t
/
m
o
n
t
h
)
Date
DewateringȱImpactȱofȱKCLADȱWellsȱ
KCLȱHorizontalȱMovementȱVelocitiesȱ(feet/month)ȱvs.ȱWater ȱDepthȱ(feet)ȱ
Augustȱ1,ȱ2024ȱȬ Januaryȱ7,ȱ2025
KC17 KC13 KC15 KC31 KCLADȬ1ȱWaterȱDepth KCLADȬ2ȱWaterȱDepth
KCLADȬ3ȱWaterȱDepth KCLADȬ4ȱWaterȱDepth KCLADȬ4aȱWaterȱDepth KCLADȬ5ȱWaterȱDepth KCLADȬ6ȱWaterȱDepth
StartȱofȱEmergencyȱDewateringȱ
Wellsȱpumpingȱofȱdeepȱartesianȱ
waterȱatȱPBLȱbeachȱ(9/13/24)ȱ
DDW1ȬDDW6
KCLADȱWellȱ#5
pumpingȱbeginsȱ
(8/29/2024)
KCLADȱWellȱ#6
pumpingȱbeginsȱ
(10/04/2024)
KCLADȱWellȱ#5 offlineȱ
(10/11/2024ȱȬ 10Ȭ25Ȭ2024)
KCLADȱWellȱ#1 isȱdry
(10/04/2024ȱȬ present)
Intermittentȱpower
disruptionsȱtoȱpumpsȱ5ȱ&ȱ6
COTTON,SHIRES ANDASSOCIATES, INC.
CONSULTING ENGINEERS AND GEOLOGISTS
),*85(
PROJECT NO.
DATE
SCALE
APPROVED BY
GEO/ENG BYMP SC6163
POS January 2025
Dewatering Impact of KCLAD Wells
KCL Horizontal Movement Velocities vs. Water Depth
August 1, 2024 - January 7, 2025
D-4
----------~~-~---------------------+
0
1
2
3
4
5
8/
1
/
2
0
2
4
9/
1
/
2
0
2
4
10
/
1
/
2
0
2
4
11
/
1
/
2
0
2
4
12
/
1
/
2
0
2
4
1/
1
/
2
0
2
5
2/
1
/
2
0
2
5
Mo
v
e
m
e
n
t
V
e
l
o
c
i
t
y
(
f
e
e
t
/
m
o
n
t
h
)
Date
GPS Monitoring Points
Horizontal Movement Velocities (feet/month)
Dewatering Impact: PBL (Sacred Cove Area) and ACL (Abalone Cove)
August 1, 2024 -January 7, 2025
PB04 PB70 AB50 AB62 AB63
Start of Emergency
Dewatering Wells
pumping of deep
artesian water at PBL
beach (9/13/24)
(DDW1-DDW6)
DD
W
-7
s
t
a
r
t
s
p
u
m
p
i
n
g
DD
W
-8
s
t
a
r
t
s
p
u
m
p
i
n
g
DD
W
-10
s
t
a
r
t
s
p
u
m
p
i
n
g
DD
W
-9
s
t
a
r
t
s
p
u
m
p
i
n
g
DD
W
-9
p
i
n
c
h
e
d
of
f
DD
W
-9a
st
a
r
t
s
p
u
m
p
i
n
g
DD
W
-11
st
a
r
t
s
p
u
m
p
i
n
g
0
1
2
3
4
5
8/
1
/
2
0
2
4
9/
1
/
2
0
2
4
10
/
1
/
2
0
2
4
11
/
1
/
2
0
2
4
12
/
1
/
2
0
2
4
1/
1
/
2
0
2
5
2/
1
/
2
0
2
5
Mo
v
e
m
e
n
t
V
e
l
o
c
i
t
y
(
f
e
e
t
/
m
o
n
t
h
)
Date
GPS Monitoring Points
Horizontal Movement Velocities (feet/month)
Dewatering Impact: PBL (West Central, East Central & Seaward Subslide Areas Only)
August 1, 2024 -January 7, 2025
PB06 PB07 PB08 PB09 PB12 PB13 PB74 UB02 PB63/64/67
Start of Emergency
Dewatering Wells
pumping of deep
artesian water at PBL
beach (9/13/24)
(DDW1-DDW6)
PB67,PB74
and UB02
(closest to
DDWs 1-6)
0
1
2
3
4
5
8/
1
/
2
0
2
4
9/
1
/
2
0
2
4
10
/
1
/
2
0
2
4
11
/
1
/
2
0
2
4
12
/
1
/
2
0
2
4
1/
1
/
2
0
2
5
2/
1
/
2
0
2
5
Mo
v
e
m
e
n
t
V
e
l
o
c
i
t
y
(
f
e
e
t
/
m
o
n
t
h
)
Date
GPS Monitoring Points
Horizontal Movement Velocities (feet/month)
Dewatering Impact: Klondike Canyon Landslide Only
August 1, 2024 -January 7, 2025
KC17 KC13 KC15 KC31
Start of Emergency
Dewatering Wells
pumping of deep
artesian water at PBL
beach (9/13/24)
DDW1-DDW6
KC13,KC15, KC17, KC31
No horizontal
displacement since
10/13/2024
0
1
2
3
4
5
8/
1
/
2
0
2
4
9/
1
/
2
0
2
4
10
/
1
/
2
0
2
4
11
/
1
/
2
0
2
4
12
/
1
/
2
0
2
4
1/
1
/
2
0
2
5
2/
1
/
2
0
2
5
Mo
v
e
m
e
n
t
V
e
l
o
c
i
t
y
(
f
e
e
t
/
m
o
n
t
h
)
Date
GPS Monitoring Points
Horizontal Movement Velocities (feet/month)
Dewatering Impact: ACL/PBL/KCL Comparison
August 1, 2024 -January 7, 2025
PB04 PB06 PB07 PB08 PB09 PB12 PB13 PB70 PB74 UB02 AB50 AB62 AB63 PB63/64/67 KC13 KC15 KC17 KC31
Start of Emergency
Dewatering Wells
pumping of deep
artesian water at PBL
beach (9/13/24)
(DDW1-DDW6)
KC13,KC15, KC17, KC31
No horizontal movement
since 10/13/2024
PB67,PB74
and UB02
(closest to
DDWs 1-6)
DD
W
-7
s
t
a
r
t
s
p
u
m
p
i
n
g
DD
W
-8
s
t
a
r
t
s
p
u
m
p
i
n
g
DD
W
-10
s
t
a
r
t
s
p
u
m
p
i
n
g
DD
W
-9
s
t
a
r
t
s
p
u
m
p
i
n
g
DD
W
-9
p
i
n
c
h
e
d
of
f
DD
W
-9a
s
t
a
r
t
s
p
u
m
p
i
n
g
DD
W
-11
s
t
a
r
t
s
p
u
m
p
i
n
g
COTTON,SHIRES ANDASSOCIATES, INC.
CONSULTING ENGINEERS AND GEOLOGISTS
),*85(
PROJECT NO.
DATE
SCALE
APPROVED BY
GEO/ENG BYMP SC6163
POS January 2025
GPS Monitoring Points
Horizontal Movement Velocities
Dewatering Impact: ACL/PBL/KCL Comparison
August 1, 2024 - January 7, 2025
D-5
........ ........ -........ -
------------------------►
II
0
1
2
3
4
5
8/
1
/
2
0
2
4
9/
1
/
2
0
2
4
10
/
1
/
2
0
2
4
11
/
1
/
2
0
2
4
12
/
1
/
2
0
2
4
1/
1
/
2
0
2
5
2/
1
/
2
0
2
5
Mo
v
e
m
e
n
t
V
e
l
o
c
i
t
y
(
f
e
e
t
/
m
o
n
t
h
)
Date
GPS Monitoring Points
Horizontal Movement Velocities (feet/month)
Dewatering Impact: PBL (Sacred Cove Area) and ACL (Abalone Cove)
August 1, 2024 -January 7, 2025
PB04 PB70 AB50 AB62 AB63
Start of Emergency
Dewatering Wells
pumping of deep
artesian water at PBL
beach (9/13/24)
(DDW1-DDW6)
DD
W
-7
s
t
a
r
t
s
p
u
m
p
i
n
g
DD
W
-8
s
t
a
r
t
s
p
u
m
p
i
n
g
DD
W
-10
s
t
a
r
t
s
p
u
m
p
i
n
g
DD
W
-9
s
t
a
r
t
s
p
u
m
p
i
n
g
DD
W
-9
p
i
n
c
h
e
d
of
f
DD
W
-9a
st
a
r
t
s
p
u
m
p
i
n
g
DD
W
-11
st
a
r
t
s
p
u
m
p
i
n
g
0
1
2
3
4
5
8/
1
/
2
0
2
4
9/
1
/
2
0
2
4
10
/
1
/
2
0
2
4
11
/
1
/
2
0
2
4
12
/
1
/
2
0
2
4
1/
1
/
2
0
2
5
2/
1
/
2
0
2
5
Mo
v
e
m
e
n
t
V
e
l
o
c
i
t
y
(
f
e
e
t
/
m
o
n
t
h
)
Date
GPS Monitoring Points
Horizontal Movement Velocities (feet/month)
Dewatering Impact: PBL (West Central, East Central & Seaward Subslide Areas Only)
August 1, 2024 -January 7, 2025
PB06 PB07 PB08 PB09 PB12 PB13 PB74 UB02 PB63/64/67
Start of Emergency
Dewatering Wells
pumping of deep
artesian water at PBL
beach (9/13/24)
(DDW1-DDW6)
PB67,PB74
and UB02
(closest to
DDWs 1-6)
0
1
2
3
4
5
8/
1
/
2
0
2
4
9/
1
/
2
0
2
4
10
/
1
/
2
0
2
4
11
/
1
/
2
0
2
4
12
/
1
/
2
0
2
4
1/
1
/
2
0
2
5
2/
1
/
2
0
2
5
Mo
v
e
m
e
n
t
V
e
l
o
c
i
t
y
(
f
e
e
t
/
m
o
n
t
h
)
Date
GPS Monitoring Points
Horizontal Movement Velocities (feet/month)
Dewatering Impact: Klondike Canyon Landslide Only
August 1, 2024 -January 7, 2025
KC17 KC13 KC15 KC31
Start of Emergency
Dewatering Wells
pumping of deep
artesian water at PBL
beach (9/13/24)
DDW1-DDW6
KC13,KC15, KC17, KC31
No horizontal
displacement since
10/13/2024
0
1
2
3
4
5
8/
1
/
2
0
2
4
9/
1
/
2
0
2
4
10
/
1
/
2
0
2
4
11
/
1
/
2
0
2
4
12
/
1
/
2
0
2
4
1/
1
/
2
0
2
5
2/
1
/
2
0
2
5
Mo
v
e
m
e
n
t
V
e
l
o
c
i
t
y
(
f
e
e
t
/
m
o
n
t
h
)
Date
GPS Monitoring Points
Horizontal Movement Velocities (feet/month)
Dewatering Impact: ACL/PBL/KCL Comparison
August 1, 2024 -January 7, 2025
PB04 PB06 PB07 PB08 PB09 PB12 PB13 PB70 PB74 UB02 AB50 AB62 AB63 PB63/64/67 KC13 KC15 KC17 KC31
Start of Emergency
Dewatering Wells
pumping of deep
artesian water at PBL
beach (9/13/24)
(DDW1-DDW6)
KC13,KC15, KC17, KC31
No horizontal movement
since 10/13/2024
PB67,PB74
and UB02
(closest to
DDWs 1-6)
DD
W
-7
s
t
a
r
t
s
p
u
m
p
i
n
g
DD
W
-8
s
t
a
r
t
s
p
u
m
p
i
n
g
DD
W
-10
s
t
a
r
t
s
p
u
m
p
i
n
g
DD
W
-9
s
t
a
r
t
s
p
u
m
p
i
n
g
DD
W
-9
p
i
n
c
h
e
d
of
f
DD
W
-9a
s
t
a
r
t
s
p
u
m
p
i
n
g
DD
W
-11
s
t
a
r
t
s
p
u
m
p
i
n
g
0
1
2
3
4
5
10
/
1
/
2
0
2
3
11
/
1
/
2
0
2
3
12
/
1
/
2
0
2
3
1/
1
/
2
0
2
4
2/
1
/
2
0
2
4
3/
1
/
2
0
2
4
4/
1
/
2
0
2
4
5/
1
/
2
0
2
4
6/
1
/
2
0
2
4
7/
1
/
2
0
2
4
8/
1
/
2
0
2
4
9/
1
/
2
0
2
4
10
/
1
/
2
0
2
4
11
/
1
/
2
0
2
4
12
/
1
/
2
0
2
4
1/
1
/
2
0
2
5
2/
1
/
2
0
2
5
Mo
v
e
m
e
n
t
V
e
l
o
c
i
t
y
(
f
e
e
t
/
m
o
n
t
h
)
Date
GPS Monitoring Points
Horizontal Movement Velocities--PB points vs. AB points (feet/month)
October 10, 2023 -January 7, 2025
PB06 PB07 PB08 PB09 PB12 PB13 PB74 UB02 AB50 AB62 AB63 PB63/64/67
COTTON,SHIRES ANDASSOCIATES, INC.
CONSULTING ENGINEERS AND GEOLOGISTS
),*85(
PROJECT NO.
DATE
SCALE
APPROVED BY
GEO/ENG BYMP SC6163
POS January 2025
GPS Monitoring Points
Horizontal Movement Velocities
PB points vs. AB points
October 10, 2023 - January 7, 2025
D-6
II
0
1
2
3
4
5
8/
1
/
2
0
2
4
9/
1
/
2
0
2
4
10
/
1
/
2
0
2
4
11
/
1
/
2
0
2
4
12
/
1
/
2
0
2
4
1/
1
/
2
0
2
5
2/
1
/
2
0
2
5
Mo
v
e
m
e
n
t
V
e
l
o
c
i
t
y
(
f
e
e
t
/
m
o
n
t
h
)
Date
GPS Monitoring Points
Horizontal Movement Velocities (feet/month)
Dewatering Impact: PBL (Sacred Cove Area) and ACL (Abalone Cove)
August 1, 2024 -January 7, 2025
PB04 PB70 AB50 AB62 AB63
Start of Emergency
Dewatering Wells
pumping of deep
artesian water at PBL
beach (9/13/24)
(DDW1-DDW6)
DD
W
-7
s
t
a
r
t
s
p
u
m
p
i
n
g
DD
W
-8
s
t
a
r
t
s
p
u
m
p
i
n
g
DD
W
-10
s
t
a
r
t
s
p
u
m
p
i
n
g
DD
W
-9
s
t
a
r
t
s
p
u
m
p
i
n
g
DD
W
-9
p
i
n
c
h
e
d
of
f
DD
W
-9a
st
a
r
t
s
p
u
m
p
i
n
g
DD
W
-11
st
a
r
t
s
p
u
m
p
i
n
g
0
1
2
3
4
5
8/
1
/
2
0
2
4
9/
1
/
2
0
2
4
10
/
1
/
2
0
2
4
11
/
1
/
2
0
2
4
12
/
1
/
2
0
2
4
1/
1
/
2
0
2
5
2/
1
/
2
0
2
5
Mo
v
e
m
e
n
t
V
e
l
o
c
i
t
y
(
f
e
e
t
/
m
o
n
t
h
)
Date
GPS Monitoring Points
Horizontal Movement Velocities (feet/month)
Dewatering Impact: PBL (West Central, East Central & Seaward Subslide Areas Only)
August 1, 2024 -January 7, 2025
PB06 PB07 PB08 PB09 PB12 PB13 PB74 UB02 PB63/64/67
Start of Emergency
Dewatering Wells
pumping of deep
artesian water at PBL
beach (9/13/24)
(DDW1-DDW6)
PB67,PB74
and UB02
(closest to
DDWs 1-6)
0
1
2
3
4
5
8/
1
/
2
0
2
4
9/
1
/
2
0
2
4
10
/
1
/
2
0
2
4
11
/
1
/
2
0
2
4
12
/
1
/
2
0
2
4
1/
1
/
2
0
2
5
2/
1
/
2
0
2
5
Mo
v
e
m
e
n
t
V
e
l
o
c
i
t
y
(
f
e
e
t
/
m
o
n
t
h
)
Date
GPS Monitoring Points
Horizontal Movement Velocities (feet/month)
Dewatering Impact: Klondike Canyon Landslide Only
August 1, 2024 -January 7, 2025
KC17 KC13 KC15 KC31
Start of Emergency
Dewatering Wells
pumping of deep
artesian water at PBL
beach (9/13/24)
DDW1-DDW6
KC13,KC15, KC17, KC31
No horizontal
displacement since
10/13/2024
0
1
2
3
4
5
8/
1
/
2
0
2
4
9/
1
/
2
0
2
4
10
/
1
/
2
0
2
4
11
/
1
/
2
0
2
4
12
/
1
/
2
0
2
4
1/
1
/
2
0
2
5
2/
1
/
2
0
2
5
Mo
v
e
m
e
n
t
V
e
l
o
c
i
t
y
(
f
e
e
t
/
m
o
n
t
h
)
Date
GPS Monitoring Points
Horizontal Movement Velocities (feet/month)
Dewatering Impact: ACL/PBL/KCL Comparison
August 1, 2024 -January 7, 2025
PB04 PB06 PB07 PB08 PB09 PB12 PB13 PB70 PB74 UB02 AB50 AB62 AB63 PB63/64/67 KC13 KC15 KC17 KC31
Start of Emergency
Dewatering Wells
pumping of deep
artesian water at PBL
beach (9/13/24)
(DDW1-DDW6)
KC13,KC15, KC17, KC31
No horizontal movement
since 10/13/2024
PB67,PB74
and UB02
(closest to
DDWs 1-6)
DD
W
-7
s
t
a
r
t
s
p
u
m
p
i
n
g
DD
W
-8
s
t
a
r
t
s
p
u
m
p
i
n
g
DD
W
-10
s
t
a
r
t
s
p
u
m
p
i
n
g
DD
W
-9
s
t
a
r
t
s
p
u
m
p
i
n
g
DD
W
-9
p
i
n
c
h
e
d
of
f
DD
W
-9a
s
t
a
r
t
s
p
u
m
p
i
n
g
DD
W
-11
s
t
a
r
t
s
p
u
m
p
i
n
g
0
1
2
3
4
5
10
/
1
/
2
0
2
3
11
/
1
/
2
0
2
3
12
/
1
/
2
0
2
3
1/
1
/
2
0
2
4
2/
1
/
2
0
2
4
3/
1
/
2
0
2
4
4/
1
/
2
0
2
4
5/
1
/
2
0
2
4
6/
1
/
2
0
2
4
7/
1
/
2
0
2
4
8/
1
/
2
0
2
4
9/
1
/
2
0
2
4
10
/
1
/
2
0
2
4
11
/
1
/
2
0
2
4
12
/
1
/
2
0
2
4
1/
1
/
2
0
2
5
2/
1
/
2
0
2
5
Mo
v
e
m
e
n
t
V
e
l
o
c
i
t
y
(
f
e
e
t
/
m
o
n
t
h
)
Date
GPS Monitoring Points
Horizontal Movement Velocities--PB points vs. AB points (feet/month)
October 10, 2023 -January 7, 2025
PB06 PB07 PB08 PB09 PB12 PB13 PB74 UB02 AB50 AB62 AB63 PB63/64/67
0.00
1.00
2.00
3.00
4.00
5.00
10
/
1
/
2
0
1
6
10
/
1
/
2
0
1
7
10
/
1
/
2
0
1
8
10
/
1
/
2
0
1
9
10
/
1
/
2
0
2
0
10
/
1
/
2
0
2
1
10
/
1
/
2
0
2
2
10
/
1
/
2
0
2
3
10
/
1
/
2
0
2
4
Mo
v
e
m
e
n
t
V
e
l
o
c
i
t
y
(
f
e
e
t
/
m
o
n
t
h
)
Date
GPS Monitoring Points
Horizontal Movement Velocities--PBL Central/Upper Points vs. ACL Points (feet/month)
October 2016 -January 7, 2025
PB07 PB12 PB13 PB18 PB26 UB02 AB62 AB63 PB63/64/67
COTTON,SHIRES ANDASSOCIATES, INC.
CONSULTING ENGINEERS AND GEOLOGISTS
),*85(
PROJECT NO.
DATE
SCALE
APPROVED BY
GEO/ENG BYMP SC6163
POS January 2025
GPS Monitoring Points
Horizontal Movement Velocities
PBL Central/Upper Points vs. ACL Points
October 2016 - January 7, 2025
D-7
-+-
II
0
1
2
3
4
5
8/
1
/
2
0
2
4
9/
1
/
2
0
2
4
10
/
1
/
2
0
2
4
11
/
1
/
2
0
2
4
12
/
1
/
2
0
2
4
1/
1
/
2
0
2
5
2/
1
/
2
0
2
5
Mo
v
e
m
e
n
t
V
e
l
o
c
i
t
y
(
f
e
e
t
/
m
o
n
t
h
)
Date
GPS Monitoring Points
Horizontal Movement Velocities (feet/month)
Dewatering Impact: PBL (Sacred Cove Area) and ACL (Abalone Cove)
August 1, 2024 -January 7, 2025
PB04 PB70 AB50 AB62 AB63
Start of Emergency
Dewatering Wells
pumping of deep
artesian water at PBL
beach (9/13/24)
(DDW1-DDW6)
DD
W
-7
s
t
a
r
t
s
p
u
m
p
i
n
g
DD
W
-8
s
t
a
r
t
s
p
u
m
p
i
n
g
DD
W
-10
s
t
a
r
t
s
p
u
m
p
i
n
g
DD
W
-9
s
t
a
r
t
s
p
u
m
p
i
n
g
DD
W
-9
p
i
n
c
h
e
d
of
f
DD
W
-9a
st
a
r
t
s
p
u
m
p
i
n
g
DD
W
-11
st
a
r
t
s
p
u
m
p
i
n
g
0
1
2
3
4
5
8/
1
/
2
0
2
4
9/
1
/
2
0
2
4
10
/
1
/
2
0
2
4
11
/
1
/
2
0
2
4
12
/
1
/
2
0
2
4
1/
1
/
2
0
2
5
2/
1
/
2
0
2
5
Mo
v
e
m
e
n
t
V
e
l
o
c
i
t
y
(
f
e
e
t
/
m
o
n
t
h
)
Date
GPS Monitoring Points
Horizontal Movement Velocities (feet/month)
Dewatering Impact: PBL (West Central, East Central & Seaward Subslide Areas Only)
August 1, 2024 -January 7, 2025
PB06 PB07 PB08 PB09 PB12 PB13 PB74 UB02 PB63/64/67
Start of Emergency
Dewatering Wells
pumping of deep
artesian water at PBL
beach (9/13/24)
(DDW1-DDW6)
PB67,PB74
and UB02
(closest to
DDWs 1-6)
0
1
2
3
4
5
8/
1
/
2
0
2
4
9/
1
/
2
0
2
4
10
/
1
/
2
0
2
4
11
/
1
/
2
0
2
4
12
/
1
/
2
0
2
4
1/
1
/
2
0
2
5
2/
1
/
2
0
2
5
Mo
v
e
m
e
n
t
V
e
l
o
c
i
t
y
(
f
e
e
t
/
m
o
n
t
h
)
Date
GPS Monitoring Points
Horizontal Movement Velocities (feet/month)
Dewatering Impact: Klondike Canyon Landslide Only
August 1, 2024 -January 7, 2025
KC17 KC13 KC15 KC31
Start of Emergency
Dewatering Wells
pumping of deep
artesian water at PBL
beach (9/13/24)
DDW1-DDW6
KC13,KC15, KC17, KC31
No horizontal
displacement since
10/13/2024
0
1
2
3
4
5
8/
1
/
2
0
2
4
9/
1
/
2
0
2
4
10
/
1
/
2
0
2
4
11
/
1
/
2
0
2
4
12
/
1
/
2
0
2
4
1/
1
/
2
0
2
5
2/
1
/
2
0
2
5
Mo
v
e
m
e
n
t
V
e
l
o
c
i
t
y
(
f
e
e
t
/
m
o
n
t
h
)
Date
GPS Monitoring Points
Horizontal Movement Velocities (feet/month)
Dewatering Impact: ACL/PBL/KCL Comparison
August 1, 2024 -January 7, 2025
PB04 PB06 PB07 PB08 PB09 PB12 PB13 PB70 PB74 UB02 AB50 AB62 AB63 PB63/64/67 KC13 KC15 KC17 KC31
Start of Emergency
Dewatering Wells
pumping of deep
artesian water at PBL
beach (9/13/24)
(DDW1-DDW6)
KC13,KC15, KC17, KC31
No horizontal movement
since 10/13/2024
PB67,PB74
and UB02
(closest to
DDWs 1-6)
DD
W
-7
s
t
a
r
t
s
p
u
m
p
i
n
g
DD
W
-8
s
t
a
r
t
s
p
u
m
p
i
n
g
DD
W
-10
s
t
a
r
t
s
p
u
m
p
i
n
g
DD
W
-9
s
t
a
r
t
s
p
u
m
p
i
n
g
DD
W
-9
p
i
n
c
h
e
d
of
f
DD
W
-9a
s
t
a
r
t
s
p
u
m
p
i
n
g
DD
W
-11
s
t
a
r
t
s
p
u
m
p
i
n
g
0
1
2
3
4
5
10
/
1
/
2
0
2
3
11
/
1
/
2
0
2
3
12
/
1
/
2
0
2
3
1/
1
/
2
0
2
4
2/
1
/
2
0
2
4
3/
1
/
2
0
2
4
4/
1
/
2
0
2
4
5/
1
/
2
0
2
4
6/
1
/
2
0
2
4
7/
1
/
2
0
2
4
8/
1
/
2
0
2
4
9/
1
/
2
0
2
4
10
/
1
/
2
0
2
4
11
/
1
/
2
0
2
4
12
/
1
/
2
0
2
4
1/
1
/
2
0
2
5
2/
1
/
2
0
2
5
Mo
v
e
m
e
n
t
V
e
l
o
c
i
t
y
(
f
e
e
t
/
m
o
n
t
h
)
Date
GPS Monitoring Points
Horizontal Movement Velocities--PB points vs. AB points (feet/month)
October 10, 2023 -January 7, 2025
PB06 PB07 PB08 PB09 PB12 PB13 PB74 UB02 AB50 AB62 AB63 PB63/64/67
0.00
1.00
2.00
3.00
4.00
5.00
10
/
1
/
2
0
1
6
10
/
1
/
2
0
1
7
10
/
1
/
2
0
1
8
10
/
1
/
2
0
1
9
10
/
1
/
2
0
2
0
10
/
1
/
2
0
2
1
10
/
1
/
2
0
2
2
10
/
1
/
2
0
2
3
10
/
1
/
2
0
2
4
Mo
v
e
m
e
n
t
V
e
l
o
c
i
t
y
(
f
e
e
t
/
m
o
n
t
h
)
Date
GPS Monitoring Points
Horizontal Movement Velocities--PBL Central/Upper Points vs. ACL Points (feet/month)
October 2016 -January 7, 2025
PB07 PB12 PB13 PB18 PB26 UB02 AB62 AB63 PB63/64/67
0.00
1.00
2.00
3.00
4.00
5.00
10
/
1
/
2
0
0
8
10
/
1
/
2
0
0
9
10
/
1
/
2
0
1
0
10
/
1
/
2
0
1
1
10
/
1
/
2
0
1
2
10
/
1
/
2
0
1
3
10
/
1
/
2
0
1
4
10
/
1
/
2
0
1
5
10
/
1
/
2
0
1
6
10
/
1
/
2
0
1
7
10
/
1
/
2
0
1
8
10
/
1
/
2
0
1
9
10
/
1
/
2
0
2
0
10
/
1
/
2
0
2
1
10
/
1
/
2
0
2
2
10
/
1
/
2
0
2
3
10
/
1
/
2
0
2
4
Mo
v
e
m
e
n
t
V
e
l
o
c
i
t
y
(
f
e
e
t
/
m
o
n
t
h
)
Date
GPS Monitoring Points
Horizontal Movement Velocities--PBL Central/Upper points vs. ACL points(feet/month)
September 2007 -January 7, 2025
PB07 PB12 PB13 PB18 PB26 UB02 AB62 AB63 PB63/64/67
COTTON,SHIRES ANDASSOCIATES, INC.
CONSULTING ENGINEERS AND GEOLOGISTS
),*85(
PROJECT NO.
DATE
SCALE
APPROVED BY
GEO/ENG BYMP SC6163
POS January 2025
GPS Monitoring Points
Horizontal Movement Velocities
PBL Central/Upper Points vs. ACL Points
September 2007 - January 7, 2025
D-8
------------
II
E-1
Dear Rancho Palos Verdes Customer,
As Southern California Edison continues to monitor the situation across the
Palos Verdes Peninsula (PVP), we recognize the ongoing challenges you and your
neighbors face . We have been working to restore power where and when it is
safe to do so .
Over the past few months, we have enhanced our monitoring of ground
conditions . Although the data shows that land movement has slowed in some
areas, restoring power depends on several factors, including the ongoing rate
and pattern of land movement, infrastructure conditions, and favorable weather
conditions that reduce wildfire risks.
As we prepare to safely restore power in select portions of the Beach Club and
Seaview areas of Rancho Palos Verdes, our crews will inspect our infrastructure
and repair or replace equipment, which may involve heavy machinery and
construction . For those eligible for service restoration, you will be contacted by
phone with information about the timeline and requirements for power
restoration. For those whose power cannot be safely restored at this time,
please stay informed about ongoing power restoration efforts
at sce.comf P-VP-landslide .
How to Prepare for Safe Power Restoration
Customers eligible for power restoration must have their homes inspected by
the city and receive a permit for any self-generation installed , including solar,
battery storage, and gas-powered generators. To schedule an inspection or to
inquire about the permitting process, please contact the City of Rancho Palos
Verdes : Building Division -30940 Hawthorne Boulevard, Rancho Palos Verdes,
CA 90275, (310) 544-5280.
If you have questions regarding the interconnection process for installed self-
generation, please contact SCE's South Bay Service Planning Office at (310) 783-
9389 .
SCE cannot restore power if any of the following conditions exist
E-2
1. Restricted access to the meter.
2. All applicable structural and electrical city inspection results and permits
have not been provided to SCE .
3. Any changes have been made to SCE's service wires .
4. The SCE meter is removed from its socket.
5. The electrical or structural conditions are deemed unsafe.
These conditions must be addressed before power can be safely restored.
While electric service will be restored to some customers, future conditions may
require turning power off again to protect public safety. Additional work is
planned to implement long-term solutions to safely provide electric service and
increase grid resiliency within and around areas of ground movement. The
planned work, which may include installing taller poles equipped with
specialized hardware designed to relieve wire tension and tolerate slight land
movement, will require lengthy outages to complete.
How to Stay Informed
SCE will continue to share new information and the status of our progress . You
can also visit sce .comf P-VP-landslide for updates. If you have any questions, our
dedicated Customer Support Team is available to assist you at 1-800-250-7339,
Monday through Friday 7 a.m. - 7 p.m., and Saturdays 8 a.m. - 5 p.m.
Sincerely,
Valarie Hernandez
Principal Manager, Customer Care Outreach & Engagement
Customer Engagement Division
Southern California Edison
SCE.COM
--1---
E-3
F-1
January 10, 2025
To: Mayor Bradley
Mayor Pro Tern Seo
Councilman Perestam
Co uncilman Lewis
Councilwoman Ferraro
CC: Ara Mihranian -Rancho Palos Verdes City Manager
Jan ice Hahn -Los Angeles County Superv isor -District 4
Dear Mayor Brad ley, Mayor Pro Tern Seo, Counc ilm an Perestam, Councilman Lewis, and
Council w oman Ferraro,
We, the undersigned members of the Seaview Residents Association Board of Directors, listened
with great interest and attention to the City Council ("Council") meeting on December 18th. On
behalf of our 270 homeowners, we wish to express our sincere appreciation to the Council and
City Staff ("Staff") for the ongoing efforts to manage the land movement in the Abalone Cove,
Portuguese Bend, and Klond ike Canyon areas. We are in total agreement with the Council's
passage of Staff recommendations to further a llocate $1M to support the operation of the
current deep de-watering wells.
The issues outlined in the Staff Report included and noted that:
I 1
• there has been a cessation of active movement in areas of high well
density/ placement;
• the geologists recommended adding additional wells along Abalone Cove to try
and mitigate ongoing movement in the impacted areas that are still moving;
• the dilemma of the high maintenance costs of running the wells due to de -
energization of the area; and
• the expenditures by the City to date on the land movement and the impact upon
the City's reserves and operating budget.
F-2
Mayor Pro Tern Seo pre sented a compelling argument and rationale for completing the plan for
additional wells in the Abalone Cove area, as was laid out by the City Geologist. We agree with
Mayor Pro Tern Seo that given the large investment in mitigation efforts by the City to date, the
undeniable positive impacts of the deep wells drilled/placed to date, and the need to
demonstrate manageable movement control across the area in order to procure re -energization
of the area (specifically the wells) by SCE, not completing the final group of deep wells
jeopardizes all of the successful efforts made to date and ensures the failure to ultimately
control the land movement.
As was discussed at the Council meeting, there is a need to fully understand what City
funds/resources are already dedicated and obligated, and what City funds/resources are
available to be brought to bear on the deep de-watering well project continuation. As such, we
are writing to voice our strong support of the Mayor Pro Tern's proposal. Additionally, we
request that the Council does not focus solely on and make decisions with respect to the use of
"City" funds alone for thi s effort. We ask that the Council instruct Staff to reach out to the
County for financial help to complete this major last step in that the movement affects LA
County sanitation/sewer lines in the area, as well as Palos Verde s Drive South ("PVDS''). As
such, we have cc'd Supervisor Hahn on this letter.
Finally, we ask that a sustainable source of funding be considered and ultimately established to
continue water removal and mitigation efforts into the future. One source could include
cre ating a t oll bond measure for PVD S that would support completion of land stabilization
efforts, and continu ed funding for t he ongoing m a intenan ce of PVD S a nd the well s need ed t o
m a inta in the ro ad . W e rec o m m e nd that such a n effo rt be vigorou sly pursued .
As always, w e apprec iate all your dedi cation, effort a nd hard work to date and loo k forward t o
working with you in the future.
Since re ly,
----------------
on beha lf of the
Seav iew Res ident's Association Boa rd of Directors
Ra yne Sherman, Lor i Givens, De irdre He imer, Nie Grillo, Nikki Noushkam, David Potter,
Kit So ng, Gerry Taccini and Mike Mill er
I 2
F-3
From:
Sent:
To:
Subject:
Attachments:
Herb Stark < pt17stearman@gmail.com>
Friday, January 17, 2025 3:18 PM
cc
Portuguese Bend Reserve
Portuguese Bend Water Use Alternatives.docx
Given the recent fires, the council should consider adopting a more aggressive strategy to reduce the risk
of a major fire in the Portuguese Bend Reserve. I've attached a paper that outlines an approach involving
the use of water being pumped out of the reserve. Even if my calculations are off by a factor of two, this
strategy could still potentially prevent a disaster.
Herb Stark
Rancho Palos Verdes
1
F-4
Wildfire Mitigation, Portuguese Bend Preserve
During the current wildfires in Los Angeles, embers have been carried over significant
distances by extreme Santa Ana winds, with gusts reaching up to 100 mph during the
Eaton Fire, contributing to its rapid spread. These winds can carry embers over a mile,
igniting spot fires far from the main blaze. The combination of high winds and dry
conditions has intensified the fires, complicating firefighting efforts.
Brush clearance around homes and roads, though crucial under normal conditions, is
less effective during Santa Ana winds, as embers can travel beyond cleared areas.
Even well-maintained areas are vulnerable to spot fires from wind-blown embers.
Therefore, additional fire prevention strategies, like firebreaks, are essential in such
conditions.
Forest management, including undergrowth and debris removal, reduces fuel and fire
intensity but is less effective during strong winds. Effective wildfire mitigation during
Santa Ana wind events requires a comprehensive strategy that includes creating
defensible spaces, establishing firebreaks, and ensuring early detection and rapid
response. In the case of Portuguese Bend eliminating dry conditions is essential.
Portuguese Bend Water Use Alternatives
The Portuguese Bend slide is a geologically unstable area where significant amounts of water are
being extracted to reduce subsurface water pressure and slow or stop the movement of the land.
This extracted water is currently being discharged into the ocean as a means of disposal.
However, discussions have arisen about how this water could be repurposed, presenting three
potential alternatives for its use:
1. Untreated Water for Fire Suppression Only
Utilizing the untreated water for fire suppression could be a cost-effective solution, as it would
eliminate the need for extensive treatment. This option leverages the high volume of water
directly for firefighting, especially in the Portuguese Bend Preserve area prone to wildfires. The
primary considerations would include ensuring that the water storage and distribution systems
are capable of rapid deployment during emergencies and that the water quality is suitable for use
in firefighting equipment.
2. Water Treatment Solutions for Agriculture eliminating dry conditions
Treating the water for agricultural use involves removing contaminants that could harm the
vegetation or soil. This treatment might include basic filtration to remove sediments and
pathogens, making it suitable for irrigation. Using this water for agriculture could support the
Trump Golf Course, Terranea Resort, Portuguese Bend Preserve and city median strip
vegetation. This solution balances cost and utility, as agricultural water does not require the
stringent purification levels needed for drinking water.
F-5
3. Drinking Water for Human Consumption
To use the extracted water for human consumption, a more complex and costly treatment process
would be required. This would involve advanced filtration, disinfection, and possibly reverse
osmosis to ensure the water meets health and safety standards. Converting this water into potable
water could help supplement local water supplies, especially in in Southern California facing
water shortages, but the high cost of treatment and strict regulatory compliance would be
significant factors to consider.
Additional Consideration: The Cost of Piping and Storing the Water
An essential aspect that has not been discussed is the infrastructure required to transport and
store the treated or untreated water. Piping the water from the extraction site to storage facilities
or directly to its end use would involve considerable investment in materials, construction, and
maintenance. Storage solutions, whether for untreated fire suppression water or treated
agricultural or potable water, would also require proper facilities to prevent contamination and
ensure availability when needed. These infrastructure costs could significantly impact the
feasibility and cost-effectiveness of each alternative.
Expanding on these alternatives involves weighing the benefits, costs, and logistical challenges
of repurposing the extracted water, with a particular focus on infrastructure needs, regulatory
requirements, and long-term sustainability.
The most affordable option is to utilize the untreated water for fire suppression in the Portuguese
Bend Preserve. Treating the water for agricultural use would involve setup costs ranging from
$50,000 to $200,000, with an annual maintenance expense of approximately $37,000.
Converting the water for human consumption would require a more substantial investment, with
setup costs estimated between $100,000 and $500,000, and yearly maintenance around $75,000.
These figures are preliminary estimates that require further refinement and should also account
for the costs of necessary infrastructure. Below is summary of the costs.
Mid-range costs ($) to utilize Portugese Bend Water
System Water Treatment Total Operation/yr
Portugese Bend
Fire Suppression Only 518,700 518,700
Agriculture 518,700 125,000 643,700 36,500
Resorts (Ag only)
Trump National 990,000 125,000 1,115,000 36,500
Terranea 1,861,000 125,000 1,986,000 36,500
Drinking Water 300,000 73,000
F-6
Companies specialize in processing well water
Several U.S. companies specialize in providing equipment for processing well water
tailored to agricultural needs. These companies offer a variety of solutions to ensure
well water meets the specific requirements of agricultural operations, enhancing both
efficiency and productivity. Here are some notable providers:
Dime Water, Inc.
Vista, CA
Offers customized water treatment units designed for agricultural applications,
addressing challenges such as filtration and pathogen removal.
DIME WATER
Magnation Water Technologies
Oakland, CA
Manufactures magnetic water treatment systems aimed at improving water quality, soil
health, and irrigation efficiency in farming operations.
MAGNATION
Traut Companies
St. Joseph, MN
With over 60 years of experience, provides well drilling, pump services, and water
treatment solutions for farm irrigation and livestock water needs.
TRAUT COMPANIES
Headwater Companies
Wichita, KS
Serves the agricultural sector with a range of water well, wastewater, and water
treatment products through its extensive network across the U.S.
HEADWATER
Newterra
Troy, NY
Offers water treatment solutions for agriculture, including filtration systems designed to
handle well water contaminants and support irrigation reuse.
NEWTERRA
Farm Water Systems
Edmonton, AB
Provides ozone water treatment systems for various agricultural industries, enhancing
water quality for applications like dairy and poultry farming.
F-7
Farm Water Systems
Edmonton, AB
Provides ozone water treatment systems for various agricultural industries, enhancing
water quality for applications like dairy and poultry farming
Costs
Agricultural Needs Only
To estimate the average cost of cleaning 500,000 gallons of well water per day for agricultural
needs, we can consider the typical range of costs associated with treating large volumes of water
for irrigation. Here's a breakdown:
Cost Components:
1. Initial Equipment Costs:
o Filtration and Basic Treatment Systems: $50,000 to $200,000 for systems
capable of handling large volumes like 500,000 gallons per day.
2. Operational Costs (500,000 gallons/day)):
o Energy and Maintenance: Typically ranges from $0.10 to $0.30 per 1,000
gallons for basic filtration and sediment removal.
• Average operational cost per 1,000 gallons: $0.20 (mid-range estimate)
500,000 gallons---;-l,000x0.20x365 days=36,500 dollars/
This is a general estimate, and the actual cost can vary based on the specific water quality,
system efficiency, and local conditions.
Drinking Water
To estimate the average cost of cleaning 500,000 gallons of well water per day for human
consumption, we need to consider the more stringent treatment processes required to meet
drinking water standards. These typically involve advanced purification methods such as
filtration, disinfection, and sometimes reverse osmosis or ultraviolet treatment.
Cost Components:
1. Initial Equipment Costs:
o Advanced Treatment Systems: $100,000 to $500,000 for systems capable of
handling 500,000 gallons per day, depending on the complexity of the
contaminants and purification methods.
2. Operational Costs (500,000 gallons/day):
o Energy, Chemicals, and Maintenance: Typically ranges from $0.28 to $0.50 per
1,000 gallons.
• Average operational cost per 1,000 gallons: $0.40 (mid-range estimate)
500,000 gallons7 l,000x0.40x365 days=73,000 dollars/
F-8
This estimate accounts for the necessary purification processes to ensure the water is safe for
human consumption, meeting health and safety standards.
Install a water main
The cost to install a water main along a road, encompassing expenses for piping,
trenching, and road repair, varies based on several factors, including pipe material,
installation method, and local conditions. On average, the cost per linear foot ranges
from $75 to $225, translating to approximately $396,000 to $1,188,000 per mile.
Trump National Golf 1.25 miles x $792,000 (mid-range)= $990,000
Terranea Resort 2.35 miles x $792,000 (mid-range)= $1,861 million
Portuguese Bend Watering System
The Portuguese Bend Reserve in Rancho Palos Verdes, California, covers
approximately 399 acres.
The cost of installing an agricultural watering system is between $600 to $2,000 per
acre.
Cost of system 399 acres x $1,300 (mid-range)=$ 518,700.
F-9
From: Ara Mihranian
Sent:
To:
Friday, January 17, 2025 5:56 AM
Jeremy Davies
Cc:
Subject:
Good morning Jeremy,
Ramzi Awwad; CityClerk
Re: Landslide remediation
I will make sure your email is included in January 21 staff report on the landslide. It will post this afternoon.
Written public comments are not included in the minutes.
Best,
Ara
Sent from my iPhone
> On Jan 16, 2025, at 12:16 PM, Jeremy Davies <jeremydavies2014@gmail.com> wrote:
>
> EXTERNAL EMAIL: Do not click links or open any attachments unless you recognize the sender and know the content is
safe!!!.
>
>
> Dear Ara and please forward to City Clerk. I copy below the email sent
> to Council on November 22, 2024 regarding the above subject and equity
> in treatment of City investments in Abalone Cove area. I was unable to
> find this correspondence in the City Council minutes for the December
> 17, 2024 Council meeting. I would like it to be transmitted to Council
> for the January 21, 2025 meeting. Please confirm.
> Many thanks,
> Regards
> Jeremy Davies
> 36 Cinnamon Lane RPV
>
> Equity in Investments in landslide remediation
>
> Jeremy Davies <jeremydavies2014@gmail.com>
>
> Fri, Nov 22, 2024, 8:20 AM
> to John, Paul, David, Barbara, Eric, Ara, Kent, Gordon Dear Mr Mayor
> and Council Members, As Council Member Seo stated at this week's
> Council meeting, it is vital that the City develops forward looking
> strategies for dealing with the landslide situation and is not
> scrambling to correct previous situations that could have been, at
> least, partially foreseen. As you are aware, a number of issues in
> addition to the two years of rain, also enter the equation of water
1
F-10
> entering the landslide in the Abalone cove area.
>
> As I look at the investments made in deep wells and the results to
> date it seems to me that the Seaview and Portuguese Bend Club with 6
> deep wells does not proportionally reflect the investments made for
> the Abalone Cove residents. The Abalone Cove residents clearly
> outnumber those in Seaview and the Portuguese Bend Club. This is also
> borne out by the number of red lined and yellow lined homes applying
> for the buyout program. If the investment decisions were determined on
> the number of residents in each area, Abalone Cove should have
> received a significantly greater investment commitment by the City
> earlier.
> Please take this into consideration as you quickly develop your
> forward looking plans and consider equitable treatment.
> Sincerely yours,
>
> Jeremy Davies
> Resident of Cinnamon Lane
>
> PS Thank you and your teams for your efforts
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