City of OaklandStorm Damage Incidents 2023
Attachment A
Storm Damage Repair Schedules
1. Storm damage during incident period significantly increased the number of City projects
• It will take time to complete all restoration work
• Working on master schedule
2. Repair plan requires technical and engineering expertise in geotechnical, hydrological, and structural analysis
• Working with consultant engineers to plan repairs and many sites damaged by the storm
Oakland Zoo
Collapsed Roadway
Entrance
Culvert collapsed under
the Oakland Zoo
roadway entrance at
Golf Links Road during
rain storm. Repairs
completed.
Total Cost Estimate:
$650,000
Completed: 100%
Priority: High
Completed Restoration 2/2/23
4525 Harbord Drive
- Damaged City storm pipe causing
sinkhole in the basement of home
- CCTV shows multiple
pipe fractures
Emergency repairs.
Total Cost Estimate: $250,000
Completed: 0%
Priority: Urgent
Flood @
4100 Redwood Rd
1/4/23 - South side of property City storm
drain along residential homes, under parcel,
and out to Redwood Rd.
-City 22" storm drain cracked (late December
/early January rains): water
shoots onto Redwood Rd and runs down
neighboring parcels.
-Repair needed.
Total Cost Estimate: $200,000
Completed: 0%
Priority: Urgent
15 Mall Ct. Landslide
Broken sewer line from fallen tree
caused by landslide in severe winter
storm.
Temporary repair completed by
emergency contractor, flow is
operational.
Permanent repair planning underway.
Work will be completed spring 2023.
Total Cost Estimate: $200,000
Completed: 0%
Flooding at
Chelsea & Longcroft Dr.
Sediment clogged City's storm drain
pipe at Chelsea Dr. and caused
major flood of intersection and
property below at 6470 Longcroft
Drive.
New storm drainage inlet needed to
prevent sediment clogs and flooding.
Total Cost Estimate: $120,000
Completed: 0%
Collapsed Storm Drain
769 Santa Ray Ave.
-1/6/23 rain caused erosion/sinkhole around
storm drain along City easement on private
property.
-Emergency repair needed to avoid foundation
settlement. To prevent future sinkholes
caused by heavy rainfall, the City repaired the
entire 144-foot storm drain, a portion of which
was damaged in FEMA 4683-DR-CA event at
769 Santa Ray.
Total Cost Estimate: $65,000
Completed: 50%
13971 Skyline Blvd.
and 7698 Surrey
Lane Hill Erosion and
Flooding
Incident period storms caused major hill
erosion and landslide, covering City’s storm
drain system and creek with excessive mud.
Emergency work: remove mud and
reestablish creek flow into City storm
drainage.
Permanent Repair: improve storm drainage
inlet located within easement on 7698
Surrey Lane to help prevent clogging caused
by flooding/landslides in the future.
Total Cost Estimate: $150,000 (tentative)
Complete: 40%
Dimond Park
Erosion
Stabilization and
Restoration
Location: 3860 Hanly Rd.
Description: 12/31/22 - Sausal Creek
flooded
• Damaged a repaired sinkhole that
formed due to a retaining wall in poor
condition.
• Entire length of poor condition retaining
wall protects the park from the creek and
should be removed and creek bank
restored using biotechnical bank
stabilization measures.
Total Cost Estimate: $1,000,000
Completed: 0%
Repair damaged by 12/31/22 creek flooding
December 2021 storm undermined
Sausal Creek retaining wall and
eroded hole in Dimond Park lawn.
Large hole repaired in fall 2022,
repaid damaged by 12/31/22 storm.
12/31/22 flooding further damaged retaining
wall.
Capacity of downstream culvert will
continue to cause flooding of Dimond
Park in large storms which are
becoming more frequent due to
climate change
Bay Forest Dr./
Tunnel Rd. Storm
Drain Overflow/
Flooding
Three culverts clogged with
sediment, displaced stormwater,
caused major erosion to the hill, and
flooded roadway and properties.
Emergency repairs complete
Long term fix remains
Total Cost Estimate: $450,000
Completed: 30%
Landslide on
Palos Colorado Trail,
Joaquin Miller Park
Landslide onto trail resulting in trail
closure and concerns for emergency
vehicle access above.
Emergency repair and long term fix
assessed.
Temporary emergency Repair Cost:
$10,000 (completed)
Permanent Repair Cost Estimate:
$100,000
Completed: 0%
Emergency vehicle access
undermined on the trail above
6000 Shepherd
Canyon Rd.
Erosion and
Flooding
Description: Landslide and major erosion
caused sediment to enter roadway and
clog nearby storm drains. This caused
flooding in the area.
Emergency work: contractor cleaned up
Future project - Restore storm drain
system
Total Cost Estimate: $100,000 (tentative)
Completed: 40%
Merriewood Dr.
Major Erosion
and Landslide
Location: Between 5665 and 5671 Merriewood Dr.
Impacts to 5777 Grisborne Ave., 5801 Thornhill Dr. ,
and possibly 5815 Thornhill Dr.
Description: Flooding caused storm drain overflow
resulting in major erosion and mudslide. Three
projects:
1. OPW - Emergency response – tarping/sandbags
and geotechnical engineer assessment
2. DOT - Repair erosion threatening Merriewood
Dr.
3. OPW - Repair hillside erosion within City
easement
Total Cost Estimate: $200,000 (tentative)
Mudslide
caused
sediment to
flow onto
5777
Grisborne Ave
/5801
Thornhill Dr.
1 & 2
3 Chimes Creek
Bank Erosion
Location: Bank of Chimes Creek in City
Right-of-Way next to 6251
Hillmont Drive.
Description: Storm eroded the bank
and exposed sewer manhole in creek.
Repair needed to prevent further
erosion impacting public and private
property.
Total Cost Estimate: $200,000
Exposed sewer manhole
due to creek bank erosion.
Fence at 6251 Hillmont
Drive boundary may be
encroaching into City ROW
Landslide/ Erosion on
City Owned Parcel
Location: adjacent to 185 Marlow Dr.
Description: Early January 2023, City-
owned hillside parcel, APN #48-5813-1-8,
and a private hillside parcel, APN #48-
5813-2-5, landslide/erosion caused
significant mud to enter private properties
on Marlow Drive and the street.
Permanent hillside stabilization measures
needed on the City parcel to prevent
future erosion and impacts to private
properties and road.
Total Cost Estimate: $400,000
Completed= 0%
4121 Saint Andrew
Rd. Landslide
Overflow storm water caused landslides
on the hill. Large tree fell on City’s street
requiring major cleanup and hill
restoration.
Total Cost Estimate: $150,000
312 Catron Drive
- Major erosion/sink hole
- Disconnected City storm drain conduit
from the outfall channel
- Urgent repairs needed
Total Cost Estimate: $150,000
Completed: 0%
Tree
Emergencies
Tree Services had addressed 22 priority 1
Tree Emergencies and 15 Priority 2 tree
debris clean-ups since 1/25. There are still
79 storm-related follow-up work orders to be
completed for trees down in parks, or woody debris
left on the side of the road. Clean up will continue
for several weeks. In many cases, large logs can
be repurposed as barriers or sitting areas.
Total Estimated Cost $1,000,000
Completed: 80%
LOWELL PARK
Shepherd Canyon
Skyline Blvd
Skyline near Chabot Space Center
OPW Assets Damaged by 2023 Storms
Category Name of damage/facility Describe Damage Primary Cause of Damage Approx. Cost % Work
Complete
A 6000 Shepherd Canyon Road Landslide and major erosion caused sediment to enter roadway and clog nearby storm drains.
This caused flooding in the area. Construction work was needed to restore storm drain systems.
The City removed heavy mud and sill and unclogged the storm drains.
Landslide $40,000 40%
A 7698 Surrey Lane Temporary
Stabilization
1/6/23, large rain event precipitated significant mud on 13971 Skyline Boulevard. Causing a Mud slide onto the property at 7698 Surrey Lane. The sediment filled an ephemeral creek channel that runs on both parcels and redirected water, which normally flows into a City storm drain easement 7698 Surrey Ln. The sediment clogged the City's storm drain and a large pile of mud filled up the ephemeral channel. The City sent a geotechnical engineer to assess and a contractor to remove mud to clear the channel and reestablish flow into the City's storm drain easement.
Landslide $250,000 100%
A Various locations Tree Removal The Tree Services unit has responded to 625 downed trees since the beginning of January. This number does not include downed limbs, which also requires a significant level of response and cost.
The projected costs of response for all winter tree response activities will significantly exceed the unit’s annual budget of $200,000 for responding to tree emergencies. That budget was already partially expended before the beginning of the calendar year (funding is issued at the beginning of the fiscal year in July and tree emergencies occur year-round).
To date the Tree Services unit has received all January storm contractor invoices totaling $405,661.23. February and March invoices are still being received but it is anticipated total contractor costs will be between $1 - $1.5 million.
Wind $1,000,000 -
$1,500,000
60%
TOTAL ESTIMATED DAMAGED PER FEMA CATEGORY A: $2,000,000 Category Name of damage/facility Describe Damage Primary Cause of Damage Approx. Cost % Work
Complete
B West moorland Dr Tarping installed at existing landslide site to protect from further soil movement Severe Storm $10,000 100% B Grandview Rd Tarping installed at existing landslide site to protect from further soil movement Severe Storm $10,000 100% B Merriewood Dr Emergency Response Flooding caused roadway edge failure. Emergency contractor needed to tarp exposed, eroded hillside and to install safety measures. Geotechnical consultant was sent to site to assess and determine urgent measures needed and urgency of permanent repair.
Landslide $30,000 100%
B Bay Forest Dr. @ Tunnel Rd. culverts
emergency repair
Hillside erosion after culverts clogged with sediment requiring emergency repairs. Severe Storm $50,000 100% B Longcroft and Chelsea Drives storm drain -
assessment
Flooding at 6470 Longcroft Drive, intersection flooded after storm drain became blocked with sediment. Emergency pumping, sandbag installed to mitigate flood.
Flood $20,000 100%
B Longcroft and Chelsea Drives storm drain -
improvement
Flooding at 6470 Longcroft Drive, intersection flooded after storm drain became blocked with sediment. Emergency pumping, sandbag installed to mitigate flood.
Flood $100,000 0%
B 769 Santa Ray Storm Drain Emergency
Repair
1/6/23 rain caused erosion/sinkhole around storm drain along City easement on private property. Storm drain easement located between two residences. Emergency repair needed to avoid foundation settlement.
Flood $5,850 100%
B Various Locations Landslide cleanup January Winter storm landslide stabilization. Emergencies caused by rain storms at various locations (West Moorland, Grandview, etc.)
Severe Storm $200,000 0%
TOTAL ESTIMATED DAMAGED PER FEMA CATEGORY B: $1,125,850.00 Categor
y Name of damage/facility Describe Damage Primary Cause of Damage Approx. Cost % Work
Complete
C Oakland Zoo Entrance Oakland Zoo Entrance with embedded culvert completely washed off during rain storm, causing the entire entrance roadway failed and collapsed Severe Storm $650,000 100%
C Golf Links Rd (location 1) Roadway edge failure requiring single lane traffic closure. Landslide $250,000 0% C Golf Links Rd (location 2) Roadway edge and guardrail failure. Landslide $250,000 0% C Claremont Ave (location 1) Roadway edge failure encroaching on traffic lane Landslide $100,000 0% C Claremont Ave (location 2) Roadway edge failure that damaged guardrail Landslide $100,000 0% C Merriewood Dr Permanent Repair Roadway edge failure encroaching on traffic lane Landslide $75,000 0% C Tunnel Rd Roadway edge failure encroaching on traffic lane Landslide $150,000 0% TOTAL ESTIMATED DAMAGED PER FEMA CATEGORY C: $1,575,000 Category Name of damage/facility Describe Damage Primary Cause of Damage Approx. Cost % Work
Complete
D Bay Forest Dr. @ Tunnel Rd. culverts -
long term fix
Hillside erosion after culverts clogged with sediment requiring permanent Severe Storm $300,000 0% D Lion Creek between Leona Creek Dr.
and Union Pacific Railroad/San Leandro
Blvd.
Basement of Coliseum Connections Apartments flooded 12/31/22 (805 71st ave oakland ca). The City storm drain system was not clogged but is influenced by tides. A project to add a flap gate at Outfall to Lion Creek will reduce flood events in the adjacent neighborhood including around 805 71st Ave Oakland CA.
Flood $250,000 0%
D 769 Santa Ray Storm Drain Permanent
Repair
To prevent future sinkholes caused by heavy rainfall, the City repaired the entire 144- foot storm drain, a portion of which was damaged in FEMA 4683-DR-CA event at 769 Santa Ray.
Flood $60,000 30%
D 1815 Woodhaven Storm Drainage
Improvement
Stormwater flood flows down Overlake Ct. are not being captured by existing inlets on Overlake Ct. and instead flow down the 15’ path behind 1815 Woodhaven and onto private properties.
Flood $200,000 0%
D 4525 Harbord Dr. Damaged storm pipe located under 4525 Harbord Dr. The property owner noticed a small sinkhole forming in the basement, running along the area where the storm pipe runs under the home. CCTV footage indicates the pipe has multiple fractures throughout.
Flood $250,000 0%
D 4100 Redwood Rd. 1/4/23 - On south side of property City storm drain runs along residential homes, under a parcel, and out to Redwood Rd. The City's 22" storm drain on 4100 Redwood cracked during December and early January rains causing water to shoot onto 4100 Redwood Rd and run down the neighboring parcels. Repair is needed.
Flood $200,000 0%
D Chimes Creekbank Erosion on City Right-
of-Way
Flooding eroded Chimes Creek bank around a sewer manhole. Requires biotechnical bank stabilization to protect adjacent private property and City right-of-way.
Flood $300,000 0%
D 15 Mall Court Landslide Broken sewer line resulting from fallen tree caused by landslide and severe January winter storm. Temporary repair completed, flow is operational. Permanent repair planning underway. City staff developed emergency repair plans and hired emergency contractor. Work will be completed spring 2023.
Landslide $200,000 10%
D 7698 Surrey Lane Permanent Repairs
within City easement
Repair and improve storm drainage inlet located within easement on 7698 Surrey Lane to help prevent clogging caused by flooding/landslides in the future.
Landslide $100,000 0%
D Bay Forest Dr. @ Tunnel Rd. culverts
emergency repair
Hillside erosion after culverts clogged with sediment requiring emergency repairs. The culverts require permanent replacement
Severe Storm $100,000 0%
TOTAL ESTIMATED DAMAGED PER FEMA CATEGORY D: $1,970,000 Category Name of damage/facility Describe Damage Primary Cause of Damage Approx. Cost % Work
Complete
G Chelsea Court - Assessment Hillside erosion from concentrated stormwater flows onto property. City contractors assessed potential future storm drainage structure.
Severe Storm $10,000 0%
G Chelsea Court - Storm drainage
installation
Hillside erosion from concentrated stormwater flows onto property. City contractors assessed potential future storm drainage structure.
Severe Storm $100,000 0%
G Palos Colorado trail in Joaquin Miller
Park - assessment
Landslide onto trail resulting in trail closure and concerns for emergency vehicle access above.
Assessment conducted to develop repair urgency recommendation and recommendation for future repair.
Landslide $10,000 100%
G Landslide/erosion on City-owned parcel
adjacent to Marlow Drive
Early January 2023, City-owned hillside parcel, APN #48-5813-1-8, and a private hillside parcel, APN #48-5813-2-5, landslide/erosion caused significant amounts of mud to enter private properties on Marlow Drive and the street. 185 Marlow Dr. most affected. Street was covered in mud.
Permanent hillside stabilization measures needed on the City parcel to prevent future erosion and impacts to private properties and road.
Landslide $400,000 0%
G Dimond Park Erosion Sausal Creek flooded and caused erosion damage to a repaired sinkhole that formed due to a retaining wall in poor condition. The entire length of poor condition retaining wall protects the park from the creek and should be removed and creek bank laid back - install biotechnical bank stabilization measures.
Flood $1,000,000 0%
G Palos Colorado trail in Joaquin Miller
Park - repair
Landslide onto trail resulting in trail closure and concerns for emergency vehicle access above. Landslide $100,000 0% TOTAL ESTIMATED DAMAGED PER FEMA CATEGORY G: $1,620,000 Damage Description/Cost Estimate – Roadway Repairs (10) Sites