Special PWTC
April 10, 2023
RECOMMENDATION
AGENDA REPORT
Staff Recommends That The City Council Receive An Informational Report On Ongoing And Proposed Winter Storm Responses Relative To Potholes, Road Closures, And Landslide Responses.
REASON FOR SUPPLEMENTAL
This report is a supplemental report to the March 29, 2023 informational report. It provides additional information from Oakland Public Works (OPW) regarding the estimates damages the City of O akland (City) suffered due to the Winter Storm Event from December 31, 2022 - January 20, 2023. As noted previously, on January 4, 2023, the City declared a Local Emergency and the State of California declared a State Emergency due to the winter storm that caused major interruptions to the City’s services and operations. Based on data collected from the January Winter Storm Event, the City had incurred $7.085 million in damages due to the storm. The primary cause of damages and the estimated cost of repairs are summarized below:
are summarized below:
1. Damage related to debris (Federal Emergency Management Agency (FEMA)-Category A): $790,000
2. Damage related to Emergency Protective Measures (FEMA-Category B): $1.13 million
3. Damage related to damaged roads (FEMA Category C): $1.575 million
4. Damage related to Water Control Facility (FEMA Category D): $1.97 million
5. Damage related to Parks, Recreation and Other (FEMA Category G) $1.62 million
Oakland and the Bay Area continue to experience severe weather conditions, and it is expected that additional damages will be incurred in the near future. OPW is actively pursuing a Federal Emergency Management Agency (FEMA) Storm Disaster grant to fund repairs in various categories. However, due to potential delays in receiving the grant, it is recommended that the City consider establishing a Disaster Emergency Restoration fund to address urgent damage without waiting for the FEMA grant to be processed.
TO: Steven Falk FROM: G. Harold Duffey
Interim City Administrator Director, Oakland Public
Works
SUBJECT: SUPPLEMENTAL – 2023 Winter
Storm Response
DATE: March 29, 2023
City Administrator Approval Date:
Apr 6, 2023
Steve Falk, Interim City Administrator
Subject: SUPPLEMENTAL – 2023 Winter Storm Response
Date: March 29, 2023 Page 2
Special PWTC
April 10, 2023
BACKGROUND
The City’s storm damage incidents are categorized based on FEMA definitions and categories of damage. City staff and contractors were dispatched during the January Winter Storm Event to mitigate immediate hazards, provide emergency repair plans to protect City assets, and minimize impact to City operations and damages to City and private properties. The Emergency Operations Center (EOC) was activated to provide centralized direction and decision-making daily during the January Winter Storm Event to ensure proper coordination between City departments and effective mitigation planning was in place.
Category A – Damage related to debris: $790,000
This category includes removal of debris in the public interest and necessary to:
1. Eliminate immediate threats to lives, public health & safety
2. Eliminate immediate threats of significant damage to improved public or private property
3. Trees and Woody Debris Building Components
4. Sand, Mud, Silt, & Gravel
5. Removal of Temporary Levees
OPW removed debris from throughout the city from the severe winter storms, including approximately 150 fallen trees during the January Winter Storm Event and over 100 additional fallen trees estimated during the February and March storms. See Table 1 below for additional details regarding the Category A damages in the city.
Table 1: Category A Damages
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%
Steve Falk, Interim City Administrator
Subject: SUPPLEMENTAL – 2023 Winter Storm Response
Date: March 29, 2023 Page 3
Special PWTC
April 10, 2023
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 B – Damage related to Emergency Protection Measures: $1.13 million
This Category includes search and rescue, security, emergency pumping, sandbagging, detour and warning signs, EOC activation, emergency and temporary repairs, overhead power lines, emergency medical facilities, emergency evacuations, and activities undertaken before, during and following a disaster to save lives and protect property. The completed Category B emergency protective measures for public safety throughout the City as detailed in Table 2 below.
Table 2: Category B Damages
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%
Steve Falk, Interim City Administrator
Subject: SUPPLEMENTAL – 2023 Winter Storm Response
Date: March 29, 2023 Page 4
Special PWTC
April 10, 2023
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
Category C – Damage related to Damaged Road and Bridges: $1.575 million The damages in this Category include mitigation, repair and replacement of City roads and bridges, involving work such as:
Roads
• Surfaces
• Bases
• Shoulders
• Ditches
• Drainage Structures
• Low Water Crossings
• Slope Failures
Bridges
• Decking & Pavement
• Piers
• Girders
• Abutments
• Slope Protection
• Approaches
Multiple roads in the City were damaged due to flooding during the January Winter Storm Event, as detailed in Table 3 below.
Special PWTC
April 10, 2023
Table 3: Category C Damages
Category
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 D: Damage related to Water Control Facilities $1.97 million
This Category includes damages and repair to the following assets: dams and reservoirs, levees, engineered drainage channels, canals, aqueducts, sediment basins, shore protective devices, irrigation facilities, and pumping facilities.
As described below in Table 4, multiple storm drains throughout the city were damaged during the January Winter Storm Event due to flooding and clogged debris.
Table 4: Category D Damages
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
Flood $250,000 0%
Steve Falk, Interim City Administrator
Subject: SUPPLEMENTAL – 2023 Winter Storm Response
Date: March 29, 2023 Page 6
Special PWTC
April 10, 2023
Creek will reduce flood events in the adjacent
neighborhood including around 805 71st Ave
Oakland CA.
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%
F 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%
F 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%
F 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 Steve Falk, Interim City Administrator
Subject: SUPPLEMENTAL – 2023 Winter Storm Response
Date: March 29, 2023 Page 7
Special PWTC
April 10, 2023
Category G – Damage related to Park, Recreation and Others: $1.62 million
The work in this Category includes playground equipment, swimming pools, bath houses, tennis courts, boat docks, piers, picnic tables, golf courses, fish hatcheries, mass transit facilities. See Table 5 below for description of the damages that occurred in this Category during the January Winter Storm Event.
Table 5: Category G Damages
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 $1,000,0
00 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 Steve Falk, Interim City Administrator
Subject: SUPPLEMENTAL – 2023 Winter Storm Response
Date: March 29, 2023 Page 8
Special PWTC
April 10, 2023
Pictures of the incidents listed in Categories A through G are included in Attachment A: FEMA 2023 Storm Damage.
ANALYSIS AND FISCAL IMPACT
Since January 2023, the City has experienced multiple heavy storms that significantly increased the need for emergency funding to repair and restore the affected areas. While all areas were temporarily made safe, this report highlights specific areas that require proactive measures to be taken for proper repairs as soon as possible. The restoration effort will require time to plan, design, and implement, with coordination between OPW and other City departments such as Economic & Workforce Development, Real Estate Division, Building & Planning, Finance, and the Oakland Department of Transportation.
OPW is collaborating with consultants to develop repair plans that involve hydrology and structural analysis, and is actively working with FEMA to secure funding and grant support through the State and Federal Disaster Relief Fund. Several meetings have already taken place between the City and FEMA, and preliminary information has been submitted by the City for initial evaluation.
The preliminary assessment shows that the City has incurred damages estimated at around $7.1 million, which are not included in the City's Capital Improvement Program (CIP). The City does not have sufficient emergency restoration funds to address damages caused by the unexpected January Winter Storm Event. In preparation for the next severe weather event or other emergency, it is crucial that the City set aside an emergency fund for OPW and other departments to complete urgent restoration projects and repair damages that could impact City operations and the health and safety of Oakland residents.
Staff are actively pursuing FEMA funding for the 2023 Winter Storm restoration effort, however the City may need to seek an additional funding source to enable immediate and urgent restoration efforts to commence while awaiting confirmation of FEMA funding. Alternatively, restoration efforts will need to be placed on hold until the projects can be included in the next CIP project cycle in 2025. City assets and operations may be negatively impacted in this situation.
COORDINATION AND PUBLIC OUTREACH
The City’s EOC was activated during the January Winter Storm Events and served as a central point of coordination and communication amongst City departments, neighboring cities and counties, and other agencies such as East Bay Municipal Utilities District, Pacific Gas & Electric, and Alameda-Contra Costa (AC) Transit. Updates on advisory and incident responses were provided to the public through four main channels: Nextdoor weblink, City of Oakland Facebook page, City of Oakland Twitter page, and City of Oakland Instagram page. Residents received up- to-date information as the EOC received status updates from the City's response teams to the incidents.
Steve Falk, Interim City Administrator
Subject: SUPPLEMENTAL – 2023 Winter Storm Response
Date: March 29, 2023 Page 9
Special PWTC
April 10, 2023
The EOC also coordinated the activation of responses by working closely with the City's OAK311 Call Center. Residents were able to report new incidents effectively through OAK311, allowing the City to respond quickly and effectively to mitigate storm damages.
ACTION R EQUESTED OF THE CITY COUNCIL
Staff Recommends That The City Council Receive An Informational Report On Ongoing And Proposed Winter Storm Responses Relative To Potholes, Road Closures, And Landslide Responses.
For questions regarding this report, please contact Siew Chin Yeong, Assistant Director of Public Works at [email protected].
Respectfully submitted,
G. HAROLD DUFFEY
Director, Oakland Public Works
Prepared by:
Siew-Chin Yeong, Assistant Director
Bureau of Design & Construction
Attachment (1):
Attachment A: FEMA 2023 Storm Damage Report