Greater Portuguese
Bend Landslide
Complex
September 15, 2026
City Dewatering Wells
July 2026 Summary
• 7 Online
• DDW-4 re-drill complete 9/18
• DDWs 8 re-drill start 9/21
• Gallons Pumped
• May – 19.5M
• June – 17.4M
• July – 17.6M
• Aug – 18.7M
• Totals:
561 Mgal
1,719 Acre-Feet
Yellow: Updates as of 9/15/26
KCLAD Dewatering Wells
July 2026 Summary
• 3 Operating
• Pumping Rate Steady
• Gallons Pumped
• May - 9.5M
• June – 8.7M
• July – 10.0M
• Aug – 6.0M
ACLAD Dewatering Wells
July 2026 Summary
• 14 Operating
• Pumping Rate Steady
• Gallons Pumped
• May – 4.8M
• June – 5.3M
• July – 5.7M
• Aug – 5.1M
City Winterization Plans
Site Description
Status /
Scheduled
Completion
Upper
Altamira
Clear debris, fill fissures,
replace/reset liner,
sandbags, and erosion
control
Early October
Seaview
Graben
Repair/seal liner,
reset/replace sandbags
as necessary
Completed
Klondike
Canyon
Repair/seal liner,
reset/replace sandbags
as necessary
Completed
Kelvin
Canyon
Replace/reset liner and
sandbags as necessary
Downstream pipe rehab
2nd Week / end
September
Portuguese
Canyon
Adjust site conditions to
facilitate positive drainage Early October
Minimize groundwater infiltration at most
vulnerable points
No
planned
work
Rainy Season Preparations • Winterization
• Early development (July), construction start (8/20/26), and completion (Early October)
• Improvements to liner systems in potentially vulnerable areas • Additional debris and erosion protection measures – Altamira Canyon • Deep Dewatering Wells
• Raising height of electrical equipment for coastal DDWs • Well enclosures
• Access improvements
• Palos Verdes Drive South
• Additional passive drainage measures (less reliance on pumping) • Standardized PW Storm monitoring and response program Ongoing El Nino
conditions this year
are forecasted (>90%
chance) to bring
elevated amounts of
rainfall to the area
between Fall and
Winter, 2026-27
Overall Movement Rates
Oct 2023 – July 2026
Movement Rate Trends
• Abalone Cove Landslide
Jan 2026 ↑ 5.7% to 2.23 in/week
Feb 2026 ↓ 3.2% to 2.16 in/week
Mar 2026 ↓ 12.0% to 1.90 in/week
April 2026 ↓ 12.6% to 1.66 in/week
May 2026 ↓ 9.6% to 1.50 in/week
June 2026 ↓ 6.7% to 1.40 in/week
July 2026 ↓ 7.7% to 1.29 in/week
• Klondike Canyon Landslide
No Horizontal or Vertical Movement w/ potential exception:
KC30 – close to PBL/KCL boundary
0.07 ft between June 2, 2026 and July 7, 2026
July 2026 - No measurable movement
• Portuguese Bend Landslide
Jan 2026 ↑ 7.4% to 1.45 in/week
Feb 2026 ↓ 5.5% to 1.37 in/week
Mar 2026 ↓ 11.7% to 1.21 in/week
April 2026 ↓ 9.9% to 1.09 in/week
May 2026 ↓ 11% to 0.97 in/week
June 2026 ↓ 3.1% to 0.94 in/week
July 2026 ↓ 13.9% to 0.81 in/week
2025-26 Rainy Season: 15.57 inches or 114% of Seasonal Average Movement Rate Summary
Movement Rate Summary
PVDS Movement Data
Survey
Point
Oct 2022
Factor
Current
Factor
PB06 1 5.42
PB07 1 4.71
PB08 1 5.42
PB09 1 4.92
PB12 1 3.40
PB13 1 1.88
Average 1 4.25
Utilities Update
• Sanitary Sewer – Portuguese Bend Community
• System-wide inspection completed in August
• Condition assessment by engineering team started and will complete this month • Sanitary Sewer – Seaview Neighborhood – no activities • Sanitary Sewer – Portuguese Bend Beach Club (PBBC) – no activities • Cal Water –
• Smart meter installations completed in June 2026
• ~50% activated. Remaining by early October 2026
• Developing project at PBBC to strengthen system and provide redundancy. Construction anticipated to start by 4th quarter 2026
• Communications - No updates since December 16, 2025
Utilities Update
• So Cal Gas
• No updates since June 16, 2026
• Homes in Seaview & PBBC that have taken necessary steps to restore service may submit request to SoCalGas.
• SCE – No updates since August 4, 2026
• 84 homes re-energized (PBBC & Seaview), 2 KCLAD dewatering well meters • Remaining 7 homes in PBBC and Seaview will be re-energized upon successful completion of electrical inspection or completion of NEM-PTO (solar installations) Grant Summary
Grant Summary
Emergency
Stabilization
Costs – FY
2025-26
*Approximately $0.3 million of purchase
orders are being reconciled and verified
for budget allocation. An update will be
provided in the next report.
All approved scope of work was
completed within budget
FINANCIAL UPDATE
1. Receive/File Updates:
• Landslide conditions, activities and financials
• Status of city’s preparation for the rainy season
• Status of grants related to landslide response
2. Extend PVDS temporary prohibition of one-, two- and three-wheeled vehicles by 60 days
3. Extend local emergency declaration by 60 days
4. Extend de-energization emergency by 60 days
Recommended Council
Actions
Questions