City of Pleasant Hill Annex HMP.pdf — Pleasant Hill City Council, April 7, 2025

City of
Pleasant Hill
Annex
2024 Hazard
Mitigation
Plan
Contra Costa County,
California
2024 Hazard Mitigation Plan
Contra Costa County, California
Table of Contents i

TABLE OF CONTENTS

1. Introduction................................................................................................................................... 1

2. Local Planning Team.................................................................................................................... 1

3. Jurisdiction Profile ....................................................................................................................... 1

3.1. Population .............................................................................................................................. 1

3.1.1. Underserved Population ................................................................................................. 1

3.2. Brief History............................................................................................................................ 2

3.3. Governing Body Format ......................................................................................................... 3

4. Development Trends .................................................................................................................... 3

4.1. Changes in Priority ................................................................................................................. 5

5. Capability Assessment................................................................................................................. 5

5.1. Planning and Regulatory Capabilities ..................................................................................... 5

5.2. Administrative and Technical Capabilities............................................................................. 10

5.3. Financial Resources............................................................................................................. 12

5.4. Education and Outreach Capabilities.................................................................................... 13

6. Hazard Mitigation Plan Integration ............................................................................................ 15

6.1. Past Plan Integration ............................................................................................................ 15

6.2. Potential Future Integration .................................................................................................. 16

7. Significant Hazard Past Events ................................................................................................. 17

8. National Flood Insurance Program............................................................................................ 17

8.1. Floodplain Manager.............................................................................................................. 17

8.2. Participation Activities........................................................................................................... 17

8.2.1. Substantial Damage ..................................................................................................... 17

8.2.2. Substantial Improvement .............................................................................................. 17

8.3. Repetitive Loss and Severe Repetitive Loss Properties........................................................ 18

9. Hazard Vulnerability and Impact Assessment.......................................................................... 18

9.1. FEMA National Risk Index.................................................................................................... 25

9.1.1. Expected Annual Loss .................................................................................................. 26

9.1.2. Social Vulnerability ....................................................................................................... 27

9.1.3. Community Resilience .................................................................................................. 27

9.1.4. Annualized Frequency .................................................................................................. 28

10. Hazard Risk Ranking............................................................................................................... 28

11. Mitigation Actions ................................................................................................................... 31 Appendix A. Hazard Maps............................................................................................................ 61 Appendix B. Stakeholder and Public Engagement.................................................................... 66 Appendix C. Hazard Risk Assessment Methodology ................................................................ 75 2024 Hazard Mitigation Plan
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City of Pleasant Hill Annex ii
Appendix D. Hazard Risk Ranking Details.................................................................................. 83 Appendix E. Plan Adoption ....................................................................................................... 103 2024 Hazard Mitigation Plan
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City of Pleasant Hill Annex 1

1. INTRODUCTION
This Annex details the hazard mitigation elements specific to the City of Pleasant Hill, a participating jurisdiction to the 2024 Contra Costa County Hazard Mitigation Plan update. This Annex is not intended to be a standalone document but supplements the information contained in Volume 1 (Planning Areawide Elements). Therefore, all sections of Volume 1 (Planning Area-wide Elements) including the planning process, mitigation goals and objectives, hazard identification and risk assessment, mitigation strategy, and plan maintenance apply to and were met by the City of Pleasant Hill. This Annex provides additional information specific to the City, with a focus on providing additional details on the hazard risk assessment and mitigation strategy (i.e., mitigation actions) for this community.

2. LOCAL PLANNING TEAM
The City of Pleasant Hill Local Planning Team was comprised of the members listed on Table 1.

Table 1. City of Pleasant Hill Local Planning Team Members Name Title Department
Brian Leonard Lieutenant City Pleasant Hill Police
Department

3. JURISDICTION PROFILE
The City of Pleasant Hill is in the central part of Contra Costa County alongside Interstate 680. Pleasant Hill has a nearby Bay Area Rapid Transit (BART) station and extensive Contra Costa County Connection bus line routes. Primarily a bedroom community, the City has a mix of small new developments and older, larger neighborhoods. Pleasant Hill is the home of the County’s main central library and John F. Kennedy University and Diablo Valley College.

3.1. Population
The City of Pleasant Hill had a population of 33,913 as of July 1, 2022. Between 2010 and 2020, the population increased by approximately 4.4%; however, a 2.2% decrease occurred between 2020 and 2022. Table 2 shows the City of Pleasant Hill’s population distribution between 2010 and 2022. 1 Table 2. Population Estimates
Jurisdiction 2010 2020 2022 Population Change
(2010 – 2022)
City of Pleasant Hill 33,152 34,613 33,913 2.3%

3.1.1. Underserved Population
The 2023 California State Hazard Mitigation Plan identifies the Centers for Disease Control and Prevention (CDC) Social Vulnerability Index (SVI) as the most appropriate and authoritative dataset to identify areas where efforts can be prioritized to ensure equitable outcomes from mitigation planning and actions.
1 United States Census Bureau. (2022). Quick Facts: City of Pleasant Hill. Retrieved from https://www.census.gov/quickfacts/fact/table/pleasanthillcitycalifornia/. 2024 Hazard Mitigation Plan
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City of Pleasant Hill Annex 2
CDC’s SVI combines 16 social factors, within four (4) themes (i.e., socioeconomic status, household characteristics, racial and ethnic minority status, and housing type and transportation), to identify areas of social vulnerability. Table 3 outlines the SVI information for the City of Pleasant Hill.

Note: ArcGIS mapping analysis was performed utilizing Census Tract data by overlaying Census Tracts with the City of Pleasant Hill planning area boundary. The information outlined in this section includes data from the Census Tracts that intersect the jurisdiction.

Table 3. Social Vulnerability Index (2020)
Theme Social Factors Population Percent
Socioeconomic
Status
People below 150% poverty estimate 3,124 9.0%
Unemployed
(Civilian 16 years old and older) 762 2.2%
Housing Cost Burden 3,224 9.3%
No High School Diploma 986 2.8%
No Health Insurance 1,262 3.6%
Household
Characteristics
65 years old and older 6,858 19.8%
17 years and younger 6,958 20.1%
Civilian with a Disability 4,123 11.9%
Single-Parent Household 754 2.2%
English Language Proficiency 755 2.2%
Racial and Ethnic
Minority Status
• Hispanic or Latino (of any race)
• Black or African American
• Asian
• American Indian or Alaska Native
• Native Hawaiian or Pacific Islander
• Two or More Races
• Other Races
13,377 38.6%
Housing Type and
Transportation
Multi-Unit Structures 2,413 7.0%
Mobile Homes 80 0.2%
Crowding 255 0.7%
No Vehicle 920 2.7%
Group Quarters 405 1.2%

3.2. Brief History
In the 1890s, Pleasant Hill was the hub of a growing farming community with good cropland.

Approximately, 19 small and large farms around the area helped provide a strong agricultural economy that sparked a steady growth. Rail travel came to Pleasant Hill in 1891 when the Central Pacific Railroad started a line through the Diablo Valley. In 1911, an electric railroad passed through the City on its way to Sacramento Valley and rural mail service began around 1912. The area that is now Pleasant Hill grew into a bedroom community during World War II. Since 2000, when it opened its new downtown area, Pleasant Hill has developed a sense of identity and a strong financial base. It has developed into a community that incorporates mixed use, such as a pedestrian oriented downtown shopping area featuring 2024 Hazard Mitigation Plan
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City of Pleasant Hill Annex 3
traditional architecture that mixes retail uses with entertainment, and residential and civic uses, anchored by the new City Hall.

3.3. Governing Body Format
The City of Pleasant Hill is governed by a five (5) member City Council. The City consists of seven (7) departments – Public Works and Community Development, Police, Redevelopment, Finance, Human Resources, City Attorney’s Office, and the City Manager’s Office. The City has nine (9) commissions and one (1) committee, which reports to the City Council. The City Council assumes responsibility for adoption of this Plan and the City Engineer will oversee its implementation.

4. DEVELOPMENT TRENDS
California Law requires counties and cities to prepare and adopt a General Pan, a comprehensive longrange plan to guide community development. The General Plan must contain seven (7) state-mandated elements – land use, housing, circulation, safety, open space, conservation, and noise – and may contain additional elements as a jurisdiction sees fit. Additionally, the General Plan must comprise an integrated and internally consistent set of goals, policies, and implementation measures. The City of Pleasant Hill adopted its General Plan in May 2023. During the plan update of this Hazard Mitigation Plan, the General Plan was undergoing its most recent update.

Pleasant Hill is much like it has been for the past several decades. The City is defined by its quiet, residential character with most neighborhoods consisting of single-family homes. However, change is happening as a result of regional growth pressure and the demand for housing. Multifamily developments are becoming more common in the city, especially close to downtown, along major corridors, and close to the BART station on the edge of the City limits. Changes in residential neighborhoods are more subtle, focusing on how to enhance the quality of these areas by improving characteristics such as connectivity, pedestrian safety, neighborhood character, and housing choice. Mixed-use development blends residential and nonresidential uses vertically within a single building or horizontally within a larger development. Commercial and office sites can accommodate development of property exclusively for commercial and employment uses (without housing) and/or mixed-use projects that integrate housing with retail, office, community facilities, and other uses within the same structure or on the same site.

Mixed-use projects can also integrate community-serving uses, such as public meeting rooms and daycare facilities in key activity areas. Commercial and mixed-uses should be designed to operate in harmony with adjacent neighborhoods and uses through the siting of buildings, transitions in scale, and the overall mix of land use.

Table 4 summarizes development trends in the performance period since development of the previous hazard mitigation plan and expected future development trends.

Table 4. Recent and Expected Development Trends
Criteria Response
Has your jurisdiction annexed any land
since the development of the previous
Hazard Mitigation Plan?
No
If yes, give the estimated area
annexed and estimated number of
parcels or structures.

N/A
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Criteria Response
Is your jurisdiction expected to annex
any areas during the performance
period of this Plan?
No
Has your jurisdiction had any major
changes in development over the past
five (5) years that have occurred in
hazard prone areas?
No
If yes, please briefly describe. N/A
Are any areas targeted for
development or major redevelopment
in the next five (5) years that will occur
in hazard prone areas?
Yes
These are sites that are identified in an eight (8) year planning document (i.e., Housing Element), thus, this development may not happen within the five (5) year timeframe, but are the areas that could most likely develop for residential and/or mixed use development.

If yes, please briefly describe.
• Diablo Valley College Overflow Parking Lot: 10 acres (seven (7) acres used to calculate lower-income realistic capacity). The proposed land use and zoning is mixed use very high density (70- 100 du/ac).
• TAP Plastics (TAP 1): 0.58 acres. The proposed land use and zoning is mixed use high density (70-100 du/ac).
• Estates Consignment (Consignment or TAP 2): 0.95 acres. The proposed land use and zoning is mixed use high density (40-70 du/ac).
• Gregory Gardens Shopping Center: 3.59 acres. The proposed land use and zoning is mixed use high density (40-70 du/ac). • Contra Costa Boulevard – Gregory Lane North (CCB-GREG North): 2.89 acres. The proposed land use and zoning is mixed use (12-40 du/ac).
• Contra Costa Boulevard – Gregory Lane South (CCB-GREG South): 2.73 acres. The proposed land use and zoning is mixed use high density (40-70 du/ac).
• Monument Triangle: 4.55 acres. The proposed land use and zoning is mixed use high density (40-70 du/ac).
• Gregory Lane Southeast (PH Greg SE): 1.03 acres. The
proposed land use and zoning is mixed use high density (40-70 du/ac).
• Gregory Lane Southwest (PH Greg SW): 1.13 acres. The
proposed land use and zoning is mixed use high density (40-70 du/ac).
• Gregory Lane Northwest (PH Greg NW): 0.42 acres. The
proposed land use and zoning is mixed use high density (40-70 du/ac).
• Gregory Lane Northeast (PH Greg NE): 1.06 acres. The
proposed land use and zoning is mixed use high density (40-70 du/ac).
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Criteria Response
Please provide the number of permits
for each hazard area or provide a
qualitative description of where
development has occurred.
• Special Flood Hazard Areas: 10
Development has occurred throughout the City during the performance period for this Plan. For those hazards other than flooding with a clearly defined extent and location, the City cannot estimate specific development impacts. For those hazards with impacts Citywide, it is safe to assume that this new development could be subject to impacts from those hazards. However, it is important to note that all new development was consistent with the City’s General Plan policies and municipal code standards and as a result most development has occurred outside of identified hazard zones.

4.1. Changes in Priority
The overall hazard mitigation priorities have not significantly changed for the City of Pleasant Hill since the last Plan update. However, mitigation actions from the previous Plan were updated, and a more concerted effort on achieving equitable outcomes for all communities, including underserved communities and socially vulnerable populations, has been implemented.

5. CAPABILITY ASSESSMENT
Federal regulations require hazard mitigation plans to identify goals for reducing long-term vulnerabilities to the identified hazards in the planning area (Section 201.6(c)(3)(i)). A critical step in the development of specific hazard mitigation actions and projects is assessing existing authorities, policies, programs, and resources and capabilities to use or modify local tools to reduce losses and vulnerability from profiled hazards.

A capability assessment was conducted for the City of Pleasant Hill and participating jurisdictions’ authorities, policies, programs, and resources. Goals and mitigation actions were developed using input from this assessment. Information regarding the City’s implementation of and continued participation in the National Flood Insurance Program (NFIP) can be found in Section 8 of this Annex.

The Local Planning Team assessed the City’s capabilities that can contribute to the reduction of longterm vulnerabilities to hazards. The capabilities include the following categories:
• Planning and Regulatory Capabilities
• Administrative and Technical Capabilities
• Financial Capabilities
• Education and Outreach Capabilities
Additionally, ways to expand on and improve these existing policies and programs to integrate hazard mitigation into the day-to-day activities and programs of the City were considered.

5.1. Planning and Regulatory Capabilities
These include local ordinances, policies, and laws to manage growth and development (e.g., land use plans, capital improvement plans, transportation plans, emergency preparedness and response plans, building codes, and zoning ordinances). The City of Pleasant Hill will adopt the approved 2024 Contra Costa County Hazard Mitigation Plan into the City’s General Plan Safety Element for AB 2140 compliance. Table 5 contains a list of legal and regulatory capabilities. The description section of each 2024 Hazard Mitigation Plan
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City of Pleasant Hill Annex 6
Planning and Regulatory Capability includes a paragraph on expansion, implementation, and improvement.

Table 5. Planning and Regulatory Capabilities
City Code, Title 3, Chapter 3.45: Disaster Council
Title 3, Chapter 3.45 provides for the preparation and execution of plans for the protection of people and property within the City in the event of an emergency and to provide for the direction of the emergency organization and the coordination of the emergency function of the City with all other public agencies and affected private people, corporations, and organizations.

Expansion, Implementation, and Improvement: The hazard identification and risk analysis in this Hazard Mitigation Plan should be used to inform emergency preparedness programs. Reducing risk by mitigation actions supports emergency preparedness goals.

Lead
Department
City of Pleasant Hill Police
Department
Hazards
Addressed
Climate Change, Dam and Levee
Failure, Drought, Earthquake,
Flood, Severe Weather, Tsunami,
Wildfire, Sea Level Rise
City Code, Title 14: Building and Construction
Includes: Building Code, Electrical Code, Plumbing Code, Mechanical Code, Housing Code, Fire Code, Grading, Community Preservation
City Building Regulations (incorporates by reference and is based upon the 2022 California Building Code, 2022 California Residential Code, 2022 California Green Building Standards Code, and 2022 California Existing Building Code [all codified in California Code of Regulations, Title 24]); adopted November 17, 2022.

Title 14 includes floodplain management regulations, and it designates the Director of Public Works as the floodplain management administrator. Additionally, it addresses stormwater management, and designates the City Manager as the Director of the Stormwater Management Program.

Expansion, Implementation, and Improvement: The Building and Fire codes will be reviewed based on developing trends in identified hazards and mitigation measures that can make them more effective at preventing losses. They will be updated to comply with the latest International and State building codes.

Floodplain management should follow the latest guidance from the Federal Emergency Management Agency (FEMA). This Hazard Mitigation Plan addresses flood hazard mitigation measures which should be aligned with floodplain management administration.

Lead
Department
City of Pleasant Hill Community
Development Department
(Building Division)
Hazards
Addressed
Climate Change, Dam and Levee
Failure, Drought, Earthquake,
Flood, Landslide, Sea Level Rise,
Severe Weather, Tsunami,
Wildfire
City Code, Title 15: Stormwater, Grading and Erosion Control Title 15 includes floodplain management regulations. It designates the City Manager as the floodplain management administrator. Additionally, it addresses stormwater management, and designates the City Manager as the Director of the Stormwater Management Program.

Expansion, Implementation, and Improvement: Include flood mitigation activities in the Stormwater Management Program. Cross reference mitigation programs and stormwater management programs for compatibility and mutual support.

Lead
Department
City of Pleasant Hill Community
Development Department
(Engineering Division)
Hazards
Addressed
Climate Change, Drought,
Earthquake, Flood, Severe
Weather, Wildfire
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City Code, Title 18: Planning and Land Use
The broad purposes of the zoning ordinance are to protect and promote public health, safety, and general welfare, and to implement the policies of the City of Pleasant Hill General Plan. More specifically, the zoning ordinance is intended to:

A. Provide a precise guide for the physical development of the city in order to:
a. Preserve the character and quality of residential neighborhoods. b. Foster convenient, harmonious, and workable relationships among land uses. c. Achieve the arrangement of land uses described in the General Plan.

B. Promote the economic stability of existing land uses.

C. Prevent excessive population densities and overcrowding of land or buildings.

D. Ensure the provision of adequate open space for light, air, and fire safety.

E. Ensure that service demands of new development will not exceed the capacities of existing streets, utilities, or public services.

Expansion, Implementation, and Improvement: Zoning Code should be modified and updated to support changes in land use development. It should be implemented to require adequate infrastructure to support residential area populations.

Lead
Department
City of Pleasant Hill Community
Development Department
(Planning Division)
Hazards
Addressed
Climate Change, Drought,
Earthquake, Flood, Severe
Weather, Wildfire
City Code, Title 17: Subdivisions
The purposes of Title 17 and any rules, regulations and specifications adopted under this Code are to:

A. Regulate and control the division of land within the City.

B. Supplement the State Subdivision Map Act concerning the design, improvement, and survey data of subdivisions, the form and content of all required maps, and the procedure to be followed in securing the official approval of the City regarding the maps.

The regulations in this Code are necessary to implement the General Plan and to preserve public health, safety and general welfare.

Expansion, Implementation, and Improvement: Subdivision Code should be modified and updated to support changes in land use development. It should be implemented to require adequate infrastructure to support residential area populations.

Lead
Department
City of Pleasant Hill Community
Development Department
(Planning Division)
Hazards
Addressed
Climate Change, Drought,
Earthquake, Flood, Severe
Weather, Wildfire
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City General Plan
The purpose of the City General Plan is the community's vision about how it will grow and reflect the community's priorities and values while shaping the future. The General Plan, adopted in July 2003, as the legal underpinning for land use decisions within the City, consists of six (6) elements, including:
• Community Development
• Economic Strategy
• Circulation
• Growth Management
• Safety and Noise
• Housing
Expansion, Implementation, and Improvement: This Hazard Mitigation Plan will be incorporated in the General Plan Safety and Noise Element, and it will be closely aligned. The General Plan will include specific actions that support mitigation throughout the City. The City is conducting a comprehensive update to its General Plan (General Plan Update for 2020 – 2040). The opportunity to incorporate additional hazard mitigation and abatement measures will be contemplated for inclusion into the updated General Plan.

Lead
Department
City of Pleasant Hill Community
Development Department
(Planning Division)
Hazards
Addressed
Climate Change, Dam and Levee
Failure, Drought, Earthquake,
Flood, Landslide, Sea Level Rise,
Severe Weather, Tsunami,
Wildfire
Emergency Operations Plan
The City of Pleasant Hill Comprehensive Emergency Management Plan (CEMP) provides strategic guidance designed to help policy makers and City staff prevent, prepare for, mitigate, respond to, and recover from natural, civil, and technological disasters. The City’s EOP was updated and published on March 1, 2023.

Expansion, Implementation, and Improvement: This Hazard Mitigation Plan will be used as an essential tool to update the City EOP. California Office of Emergency Services (Cal OES) requires that EOPs describe applicable hazards as part of the Plan. The latest Hazard Mitigation Plan hazards descriptions will be included.

Mitigation actions that are preparedness and response in nature will be analyzed for applicability for inclusion in the description of EOP processes and procedures.

Lead
Department
City of Pleasant Hill Police
Department
Hazards
Addressed
Climate Change, Dam and Levee
Failure, Drought, Earthquake,
Flood, Landslide, Sea Level Rise,
Severe Weather, Tsunami,
Wildfire
Capital Improvement Plan
The Capital Improvement Plan (CIP) provides broad direction for development of City facilities and infrastructure.

It describes a strategy to maintain adequate support for the City’s communities and commerce; and addresses transportation, greenhouse gases, stormwater, and other environmental factors.

Expansion, Implementation, and Improvement: The CIP should include mitigation measures that will be funded by the City such as improvements to stormwater collection systems, elevation of roadways at risk for flooding and strengthening of structures.

Lead
Department
City of Pleasant Hill Community
Development Department
(Engineering Division)
Hazards
Addressed
Climate Change, Dam and Levee
Failure, Drought, Earthquake,
Flood, Landslide, Sea Level Rise,
Severe Weather, Tsunami,
Wildfire
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Continuity of Operations Plan
This Plan is under development.

Lead
Department
City of Pleasant Hill Police
Department
Hazards
Addressed
Climate Change, Dam and Levee
Failure, Drought, Earthquake,
Flood, Landslide, Sea Level Rise,
Severe Weather, Tsunami,
Wildfire
County Climate Action Plan
The Contra Costa County Climate Action Plan (CAP), adopted in December 2015, is the County’s strategic approach to reduce greenhouse gas (GHG) emissions from sources throughout the unincorporated area. The CAP reflects the County’s programs and actions to decrease energy use, improve energy efficiency, develop renewable energy, reduce vehicle miles traveled, increase multi-modal travel options, expand green infrastructure, reduce waste, and improve the efficiency of government operations. The City is in the process of developing its own CAP.

Expansion, Implementation, and Improvement: The CAP will be updated in parallel with the General Plan.

While the General Plan will provide the long term resiliency framework of goals and policies, the CAP will provide strategic implementation programs to show how the County will reduce GHG emissions in support of the State’s adopted reduction targets for 2030 and 2050, reducing GHG emissions 40% below 1990 levels by 2030, with consideration of the State’s long term goal to reduce GHG emissions to 80% below 1990 levels by 2050.

Lead
Department
Contra Costa County Department
of Conservation and Development
Hazards
Addressed
Climate Change, Drought, Flood,
Severe Weather, Wildland Fire,
Sea Level Rise
Contra Costa Hazardous Materials Plan / Hazardous Material Business Plan Addresses the storage, use, and emergency planning for hazardous materials and extremely hazardous substances in the community and businesses.

Expansion, Implementation, and Improvement: This Hazard Mitigation Plan will support mitigation measures compatible with the County Hazardous Materials Plan to reduce potential hazardous materials releases.

Lead
Department
Contra Costa Health Services,
Hazardous Materials Program
Office; Contra Costa County Fire
Protection District
Hazards
Addressed Hazardous Materials Incidents
Alameda and Contra Costa County Regional Wildfire Prevention Plan The Contra Costa Resource Conservation District (CCRCD) and the Alameda City Resource Conservation District (ACRCD) worked jointly with funding from the Coastal Conservancy to develop a Regional Priority Plan (RPP) for Contra Costa and Alameda Counties. The goal of the RPP process was to identify regional natural resource concerns that could be exacerbated by catastrophic wildfire and develop projects or other methods to remedy those issues ahead of the next wildfire event. The planning process started in November 2020 and completed in September 2022.

Expansion, Implementation, and Improvement: This Hazard Mitigation Plan and Regional Wildfire Prevention Plan should be aligned where mitigation actions in this Hazard Mitigation Plan support the goals of the Regional Wildfire Prevention Plan. The wildfire analysis in this Hazard Mitigation Plan can inform updates and revisions to the Wildfire Prevention Plan.

Lead
Department
Contra Costa County Fire
Protection District
Hazards
Addressed Wildfire
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Contra Costa County Community Wildfire Protection Plan
The Contra Costa County Wildfire Protection Plan (CWPP), updated in 2019, provides an analysis of wildfire hazards and risk in the wildland urban interface (WUI) in Contra Costa County. The Plan follows the standards for CWPPs established by the Federal Healthy Forest Restoration Act.

Expansion, Implementation, and Improvement: This Hazard Mitigation Plan and County Community Wildfire Protection Plan should be aligned where mitigation actions support the goals of the CWPP. The wildfire analysis in this Hazard Mitigation Plan can inform updates and revisions to the CWPP.

Lead
Department
Contra Costa County Fire
Protection District
Hazards
Addressed Wildfire

5.2. Administrative and Technical Capabilities
The administrative and technical capabilities include community (i.e., public and private) staff and their skills and tools, which can be used for mitigation planning and implementation. This capability includes engineers, planners, emergency managers, GIS analysts, building inspectors, grant writers, and floodplain managers. Small communities may rely on other government entities, such as counties or special districts, for resources. These capabilities may be used to support mitigation activities. Table 6 lists administrative and technical capabilities.

Table 6. Administrative and Technical Capabilities
Planners, Engineers, Building Officials, Code Enforcement Planners, engineers, building officials, and/or code enforcement issue building permits, review plans for new construction and improvements; conduct plan checks; work with architects, engineers, designers, and building owners during pre-construction; inspect all phases of residential and commercial/industrial construction for compliance; enforce municipal code violations.

Expansion and Improvement: Provide opportunities for continued education to Community Development staff to maintain state of the art knowledge of new code and regulatory requirements.

Department City of Pleasant Hill Community Development Department Planners, Engineers, Analysts, General Staff
Planners, engineers, analysts, and general staff plans future City land use; development and implementation of the 2040 General Plan; land use regulations through zoning and subdivision codes, and environmental review of development; administration of the Community Development Block Grant Program (CDBG), conduct the Code Compliance program with the Building Division; conduct conditional use permits, variances, land subdivision, California Environmental Quality Act (CEQA) review, public hearings, noise permits, and zoning information.

Expansion and Improvement: Provide opportunities for continued education to Community Development staff to maintain state of the art knowledge of new code and regulatory requirements.

Department City of Pleasant Hill Community Development Department 2024 Hazard Mitigation Plan
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Director, Assistant Director, Superintendent, Supervisor, Engineers, Analysts, General Staff Directors, assistant directors, superintendents, supervisors, engineers, analysts, and general staff oversee public and private improvements in the public right of way; develop and implement the Capital Improvement Program by providing staff support to the City relative to City streets, sanitary sewer, storm drains, water system facilities, traffic signals, park, and recreational facilities; maintain and upgrade public infrastructure; provide services related to traffic issues; monitors the street lighting system maintained by the City and PG&E; keeps and maintains record drawings of City owned infrastructure; conducts traffic committee meetings with the Police Department; and provides engineering support to other City departments and divisions within the Public Works Department.

Expansion and Improvement: Provide opportunities for continued education to Public Works staff to maintain state of the art knowledge of new code and regulatory requirements.

Department City of Pleasant Hill Public Works, City of Pleasant Hill Community Development Department (Engineering Division and Maintenance Division)
Police Department
The Police Department provides coordinated response and recovery from major emergencies and disasters; develop, administer, and coordinate the emergency planning preparedness program in conformity with local, State, and Federal requirements; develop emergency management and hazard mitigation plans; provide training to City develop, maintain, and coordinate the City EOC; provide businesses and residents with emergency planning and preparedness material to help reduce the loss of life and property resulting from a disaster; coordinate with City, County, State, and Federal counterparts; prepare emergency management grants; coordinate the efforts of volunteer organizations.

Expansion and Improvement: Provide training to officers, EOC staff, and other key personnel to better prepare for potential hazards and take action to report them.

Department City of Pleasant Hill Police Department
Police Department – Community Emergency Response Team Training The Police Department provides free disaster preparedness and Community Emergency Response Team (CERT) training to residents and businesses in the City; provide an organizing framework and support to neighborhood CERT teams, which may volunteer in the event of emergencies and/or major disasters. General education for people and businesses.

Expansion and Improvement: Include mitigation activities that enhance public awareness of hazards, advertise CERT, and contribute to individual/family preparedness.

Department City of Pleasant Hill Police Department
Floodplain Manager
As a member of NFIP, the Floodplain Manager is responsible for collaborating with stakeholders to ensure the Floodplain Management Ordinance is followed within the City.

Expansion and Improvement: Continue to manage the City’s NFIP participation. Support the development of mitigation activities consistent with the best practices for floodplain management.

Department City of Pleasant Hill Community Development Department (Engineering Division) Public Information Officer
The Public Information Officer (PIO) provides public and media information regarding the City’s disaster response, mitigation, and recovery efforts.

Expansion and Improvement: Continue to use PIOs to promote awareness of this Hazard Mitigation Plan and activities associated with individual mitigation projects as they are implemented.

Department City of Pleasant Hill City Manager’s Office
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Information Technology and Geographic Information System Information technology (IT) and Geographic Information Systems (GIS) provide the technical resources and support necessary to operate all of the applications relating to the City's information resources; respond to the service needs to all departments based on citywide priorities as established by the City Manager; responsible for the training and effective use of all City technology computer hardware, software, and peripherals; provide internal coordination of technology efforts Citywide including substantial interface with all technology vendors to assure cost-effective, secure, and reliable technologies compatible with the long-range needs of the City; provide highquality spatial data to City departments.

Expansion and Improvement: Acquire and conduct training for GIS technicians on the latest versions of ArcGIS.

Department City of Pleasant Hill Community Development Department (Planning Division) Risk Management
Risk Management provides services to assist City departments in managing their risk of injury to employees, City property, and the public at large; purchase insurance for City departments and act in an advisory capacity with respect to workers' compensation, public liability, City property, and City contracts.

Expansion and Improvement: Continue to have the Risk Manager provide input to support the analysis of potential losses due to hazards. Update this Hazard Mitigation Plan based on current insurance values.

Department City of Pleasant Hill Human Resources Department County Flood Control and Water Conservation District
The Contra Costa County Flood Control and Water Conservation District serves an advisory capacity to the Engineering Division and the Planning Commission relative to drainage and flood control problems.

Department Contra Costa County Flood Control and Water Conservation District

5.3. Financial Resources
Table 7 contains a list of financial capabilities available to the City. These financial resources may be used to support mitigation activities based on procedures for each resource.

Table 7. Financial Resources
General Fund
The General Fund Program funds operations and specific projects.

Expansion and Improvement: Hazard mitigation projects may be considered during the annual budgeting process for funding from the General Fund.

Administrator City of Pleasant Hill Finance Department
City Council Administered Special Funds
Most special revenue funds were established to mitigate the impact of projects approved in certain areas of the City and most funds have been intended for uses that will benefit the quality of life for the communities in which the project is approved and special revenue funds originated.

Expansion and Improvement: Focus Administered Special Funds on projects that provide mitigation to natural hazards.

Administrator City of Pleasant Hill City Council
2024 Hazard Mitigation Plan
Contra Costa County, California
City of Pleasant Hill Annex 13
National Pollutant Discharge Elimination System
The National Pollutant Discharge Elimination System (NPDES) is a joint effort of the Planning, Engineering, and Public Works departments through the Contra Costa County Clean Water Program. Since 1993, the City has worked with Contra Costa County Flood Control and Water Conservation District, and 15 other cities within the County to meet federal mandates for minimizing pollutants in stormwater runoff. This revenue is used to fund its pro-rated share of the Clean Water Program’s staffing, overhead costs, and local level activities necessary to comply with the joint Municipal Regional Permit (MRP) provisions.

Expansion and Improvement: Where permissible, the NPDES Fund may be considered during the annual budgeting process for funding mitigation projects.

Administrator City of Pleasant Hill Community Development Department (Engineering Division) Community Development Block Grant
The Community Development Block Grant (CDBG) Program provides funding for eligible senior activities such as in-home care, art classes, counseling, and home-delivered meals. The United States Department of Housing and Urban Development (HUD) also provides Disaster Recovery Assistance in the form of flexible grants to help cities, counties, and states recover from Presidentially Declared Disasters, especially in low-income areas, subject to the availability of supplemental appropriations.

Expansion and Improvement: Where applicable, CDBG should be used to fund mitigation projects that enhance the resiliency of low-income and underserved communities.

Administrator United States Department of Housing and Urban Development, City of Pleasant Hill Community Development Department
Hazard Mitigation Grant Program
The Hazard Mitigation Grant Program (HMPG) provides support for post-disaster mitigation plans and projects.

Expansion and Improvement: Train staff on notice of intent (NOI) procedures and track opportunities on the Cal OES mitigation website to initiate applications for grant funding.

Administrator Federal Emergency Management Agency, City of Pleasant Hill Community Development Department
Building Resilient Infrastructure and Communities
Building Resilient Infrastructure and Communities (BRIC) provides support for pre-disaster mitigation plans and projects.

Expansion and Improvement: Train staff on notice of intent (NOI) procedures and track opportunities on the Cal OES mitigation website to initiate applications for grant funding.

Administrator Federal Emergency Management Agency, City of Pleasant Hill Community Development Department
Flood Mitigation Assistance Grant Program
The Flood Mitigation Assistance (FMA) Grant Program mitigates structures and infrastructure with repetitive losses.

Expansion and Improvement: Train staff on notice of intent (NOI) procedures and track opportunities on the California OES mitigation website to initiate applications for grant funding.

Administrator Federal Emergency Management Agency

5.4. Education and Outreach Capabilities
Table 8 lists the City's financial and public outreach capabilities. These capabilities include fire safety programs, hazard awareness campaigns, public information, and communications offices. Education and outreach capabilities can be used to inform the public about current and potential mitigation activities. 2024 Hazard Mitigation Plan
Contra Costa County, California
City of Pleasant Hill Annex 14
Table 8. Education and Outreach Resources
City Emergency/Disaster Readiness Website
https://www.pleasanthillca.org/410/Be-Prepared
The City’s Police Department website has educational material on numerous programs, including making an emergency plan, stocking supplies, staying informed, and getting involved in community preparedness programs.

Visitors may register their phone number to receive timely alerts about incidents and emergencies within the City and County.

Expansion and Improvement: Provide links to the City and County websites. Post material on social media accounts that provide a link to the appropriate FEMA website page.

Lead Organization City of Pleasant Hill Police Department City Social Media Accounts
Facebook: https://www.facebook.com/groups/2204604710/ | https://www.facebook.com/PleasantHillPD/ X (formerly Twitter): https://twitter.com/PleasantHill_CA | https://twitter.com/PHillPD Instagram: https://www.instagram.com/downtownpleasanthill/ The City uses its social media accounts to post information to collect input on updating this Hazard Mitigation Plan. These social media accounts can have links to other City webpages that provide details on mitigation projects and activities. They can also provide information and links to County, State and Federal emergency preparedness sites that provide information on individual and family preparedness.

Expansion and Improvement: Develop a comprehensive program to utilize social media to reach out to communities in the City to provide information on mitigation activities. Conduct an annual survey to solicit input.

Provide information and conduct the survey in English and Spanish.

Lead Organization City of Pleasant Hill Information Technology Department County Public Safety and Emergency Information
https://www.contracosta.ca.gov/5435/Public-Safety-Emergency-Info Provides resources and links for public safety and emergency information in Contra Costa County.

Expansion and Improvement: Provide additional links to other organizations such as FEMA and PG&E.

Lead Organization Contra Costa County Office of Emergency Services County Community Emergency Response Team Coalition
The CERT Program is a 20-hour all risk, all hazard training offered by the County’s Fire Department. This valuable course is designed to help you protect yourself, your family, your neighbors, and your neighborhood before, during, and after an emergency.

Expansion and Improvement: Conduct coordinated training and exercises with all County CERTs to improve interoperability.

Lead Organization Contra Costa County Cities Citizen Corps Community Warning System
The Community Warning System (CWS) can alert residents and businesses within Contra Costa County that are impacted by or are in danger of being impacted by an emergency. The CWS message will include basic information about the incident and what specific protective actions (e.g., shelter in place, lockdown, evacuate, avoid the area) are necessary for life safety and health.

Expansion and Improvement: Coordinate community evacuation drills using the CWS to implement the exercise. Conduct post exercise information fairs at evacuation collection points.

Lead Organization Contra Costa County Office of the Sheriff 2024 Hazard Mitigation Plan
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City of Pleasant Hill Annex 15
Lafayette's Community Information & Emergency Radio Station AM 1670 The City of Lafayette operates a Federal Communications Commission (FCC) licensed community information and emergency radio station that transmits 24/7 throughout the area at 1670 kHz in the AM broadcast band. The station is designed to provide City of Lafayette news and information that citizens can listen to at any time. During emergencies (e.g., power outages, wildfires), the radio station will broadcast important information such as evacuation instructions.

AM 1670 is also reachable within the City of Orinda and the City of Pleasant Hill.

Expansion and Improvement: Provide information on mitigation activities on radio shows and broadcasts.

Advertise opportunities to provide input to this Hazard Mitigation Plan on the radio station.

Lead Organization City of Lafayette Police Department

6. HAZARD MITIGATION PLAN INTEGRATION
The information on hazards, risk, vulnerability, and mitigation contained in this Hazard Mitigation Plan is based on the best available data at the time of the Plan update. Plan integration consists of the incorporation of hazard mitigation into other relevant planning mechanisms (e.g., general planning and capital improvement planning). It includes the integration of natural hazard information and mitigation policies, principles, and actions into local planning mechanisms and vice versa. Additionally, plan integration is achieved though the involvement of key staff and community officials in collaborative hazard mitigation planning. This section describes the City’s process for integrating information from this Hazard Mitigation Plan into other planning mechanisms.

6.1. Past Plan Integration
In the performance period since the adoption of the previous Hazard Mitigation Plan, City of Pleasant Hill made progress on integrating components of the hazard mitigation strategy (e.g., goals, objectives, and actions) into the planning initiatives listed in Table 9.

Table 9. Past Plan Integration
Planning Initiative Description
City General Plan
This Hazard Mitigation Plan will be incorporated in the General Plan Safety and Noise Element, and it will be closely aligned. Furthermore, the Hazard Mitigation Plan is utilized to identify new information that was not available during the previous revision of the General Plan, relating to hazards (i.e., flood and fire), and climate adaptation and resiliency strategies.

Capital Improvement Plan
The Capital Improvement Plan should continue to utilize flexibility in the CIP to incorporate mitigation measures in planned projects and the project evaluation criteria which includes public health and safety, regulatory compliance, and grant funding requirements.

Emergency Operations Plan This Hazard Mitigation Plan is currently used as an essential tool to update the City EOP.

Design Guideline The Design Guidelines were updated in 2017 to include consideration of risk from natural hazards.

Floodplain Management
Program
Portions of the Hazard Mitigation Plan with the associated mapping will be considered for inclusion in procedures/ordinances for the Floodplain Management Program. The City requires all applicants who intend to build within the floodplain to submit final flood elevation certificates to demonstrate that the proposed structure is built above the base flood elevation. 2024 Hazard Mitigation Plan
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City of Pleasant Hill Annex 16

6.2. Potential Future Integration
As the Hazard Mitigation Plan is implemented, the City of Pleasant Hill will use information from the Plan as the best available science and data on hazards. The capability assessment presented in Section 5 of this Annex identifies codes, plans, and programs that provide opportunities for integration. The citywide and local action plans developed for this Hazard Mitigation Plan are related to plan integration. The capability assessment identified plans and programs, listed in Table 10, that do not currently integrate goals and recommendations of this Plan but provide opportunities to do so in the future.

Table 10. Potential Future Integration
Planning Initiative Description
City’s General Plan
The General Plan 2020 – 2040 was updated and information from the risk assessment, and hazard mitigation goals and actions from this Hazard Mitigation Plan will be incorporated pursuant with Assembly Bill 2140 and Senate Bill 379.

Capital Improvement Plan
The City will continue to ensure consistency between this Hazard Mitigation Plan and future updates of the Capital Improvement Plan. The Hazard Mitigation Plan may identify new possible funding sources for capital improvement projects and may result in modifications to proposed projects based on results of the risk assessment.

Emergency Operations Plan
This Hazard Mitigation Plan will remain an essential tool to update the City EOP.

The latest Hazard Mitigation Plan hazards descriptions will be included.

Mitigation actions that are preparedness and response in nature will be analyzed for applicability and for inclusion in the description of EOP processes and procedures.

City Code
Mitigation actions and the hazard risk assessment in this Hazard Mitigation Plan can inform updates and revisions to the City Code.
• Building and Construction Code (Title 14) will be reviewed based on development trends in identified hazards and mitigation measures that can make them more effective at preventing losses. They will be updated to comply with the latest International and State building codes.

Additionally, the flood hazard mitigation measures addressed in this Hazard Mitigation should be aligned with floodplain management administration.
• Stormwater, Grading, and Erosion Control Code (Title 15) will use flood mitigation activities identified in this Hazard Mitigation Plan and include them in the Stormwater Management Program.
• Planning and Land Use Code (Title 16) should be modified and updated to support changes in land use development.
• Subdivisions Code (Title 17) will be modified and updated to support changes in land use development and require adequate infrastructure to support residential area populations.

The City’s Local Planning Team will identify all relevant planning initiatives that are scheduled to be updated in the next year and during the annual update process of the Hazard Mitigation Plan. Additionally, opportunities to integrate key elements of the Hazard Mitigation Plan, specifically any relevant strategies, into the planning initiatives will be identified by the Local Planning Team. Mitigation actions were identified to promote plan integration in future revisions of this Plan. 2024 Hazard Mitigation Plan
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7. SIGNIFICANT HAZARD PAST EVENTS
A complete risk assessment, including past incidents, for each identified hazard of concern can be found in Volume 1 (Planning Area-wide Elements) of this Plan.

8. NATIONAL FLOOD INSURANCE PROGRAM
The City of Pleasant Hill is a member of the National Flood Insurance Program (NFIP) but has chosen to not participate in the NFIP’s Community Rating System (CRS). The City’s NFIP participation information is listed in Table 11.

Table 11. NFIP Participation Information
CID Community
Name
NFIP
Participation
Date
Current
Effective
FIRM Date
CRS Entry
Date
CRS
Current
Effective
Date
CRS
Class
060034 City of Pleasant
Hill 5/24/1974 3/21/2017 5/1/2003 11/2/2023 9

8.1. Floodplain Manager
As an NFIP participating jurisdiction, the City of Pleasant Hill has a designated Floodplain Manager that is charged with enforcing floodplain regulations, routinely monitoring the floodplains, and providing community assistance such as encouraging owners to maintain flood insurance. The City’s Floodplain Manager information is listed in Table 12.

Table 12. Floodplain Manager
Jurisdiction Department Name Title Phone Number
City of Pleasant Hill Engineering Omar Adina Assistant Engineer (925) 671-5260

8.2. Participation Activities
The City of Pleasant Hill NFIP participation activities over the last five (5) years include the following:
• Provides the following services – permit review, GIS, inspections, and engineering capability. • The City educates private owners and other stakeholders about the importance of flood insurance through public outreach events, workshops, and/or seminars. • Enforces local floodplain regulations and monitors compliance. • Floodplain management regulations meet or exceed FEMA or State minimum requirements.

8.2.1. Substantial Damage
Substantial damage means damage of any origin sustained by a structure by which the cost of restoring the structure to its before damaged condition would equal or exceed 50% of the market value of the structure before the damage occurred. (Municipal Code Title 15, Chapter 15.15 – Flood Damage Prevention)

8.2.2. Substantial Improvement
Substantial improvement means any repair, reconstruction, or improvement of a structure, the cost of which equals or exceeds 50% of the market value of the structure either:
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• Before the improvement or repair is started.
• If the structure has been damaged, and is being restored, before the damage occurred.

For the purposes of this definition substantial improvement is considered to occur when the first alteration of any wall, ceiling, floor, or other structural part of the building commences, whether or not the alteration affects the external dimensions of the structure. The term does not, however, include either:
• Any project for improvement of a structure to comply with existing state or local health, sanitary, or safety code specifications which are solely necessary to assure safe living conditions. • Any alteration of a structure listed on the National Register of Historic Places or a State Inventory of Historic Places. (Municipal Code Title 15, Chapter 15.15 – Flood Damage Prevention)

8.3. Repetitive Loss and Severe Repetitive Loss Properties The Federal Emergency Management Agency (FEMA) defines a Repetitive Loss property as an NFIP insured structure with two (2) or more claims of more than $1,000 each within any rolling 10-year period, since 1978.2
A Severe Repetitive Loss property is defined by FEMA as any NFIP insured structure for which either of the following is true when at least two (2) of the claims are within 10 years of each other (claims made within 10 days will be counted as one (1) claim):
3 • That has incurred flood related damage for which four (4) or more separate claims payments have been made, with the amount of each claim (including buildings and contents payments) exceeding $5,000, and with the cumulative amount of such claims exceeding $20,000. • For which at least two (2) separate claims payments (building payments only) have been made under such coverage, with the cumulative amount of such claims exceeding the market value of the building.

Repetitive loss records from the City of Pleasant Hill are listed in Table 13.

Table 13. Repetitive Loss Properties
Jurisdiction Repetitive Loss
Properties
Severe Repetitive
Loss Properties Mitigated Properties
City of Pleasant Hill 3
(3 Single Family) 0 1(1 Single Family)

9. HAZARD VULNERABILITY AND IMPACT ASSESSMENT
Exposure and vulnerability to certain hazards affect the entire County and others are geographically defined. Although the entire County may be vulnerable to these hazards, their impacts may vary based on existing community conditions (e.g., underserved, or functional access needs populations may be more susceptible based on certain conditions, vulnerabilities, or needs). 2 Federal Emergency Management Agency. (2020). Repetitive Loss Structure. Retrieved from https://www.fema.gov/node/405233. 3 Federal Emergency Management Agency, National Flood Insurance Program. (2022). Flood Insurance Manual:

Risk Rating 2.0: Equity in Action Edition. Retrieved from https://www.fema.gov/sites/default/files/documents/fema_nfip-flood-insurance-full-manual_102022.pdf. 2024 Hazard Mitigation Plan
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City of Pleasant Hill Annex 19
The Local Planning Team identified unique vulnerabilities and impacts to the following natural hazards, based on the hazards profiled in Volume 1 (Planning Area-wide Elements). • Climate Change
• Drought
• Earthquake
• Flood (riverine/creek, urban/flash flood)
• Landslide
• Wildfire
It was determined that the planning area did not have unique vulnerabilities and impacts to the following natural hazards; rather, its vulnerability and impacts are consistent with those experienced throughout the County.
• Dam and Levee Failure
• Sea Level Rise
• Severe Weather (heavy rainfall, severe thunderstorms, strong winds/damaging winds, heat wave/extreme heat, tornado)
• Tsunami
Note: Severe weather and flooding are profiled as the two (2) hazards. However, in an effort to have a more thorough risk assessment, the sub hazards (i.e., heavy rainfall, severe thunderstorms, strong winds/damaging winds, heat wave/extreme heat, tornado, riverine/creek flooding, and urban/flash flooding) were ranked individually. The hazard risk assessment methodology can be found in Appendix C of this Annex.

Table 14 provides information on several key vulnerabilities and impacts for the City of Pleasant Hill and only addresses the hazards that are relevant and unique to the jurisdiction. A complete risk assessment for each identified hazard of concern is in Volume 1 (Planning Area-wide Elements) of this Plan. Hazard mapping can be found in Appendix A of this Annex.
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Table 14. Hazard Vulnerability and Impact Assessment
Hazards Vulnerabilities and Impacts
Climate Change
Rising sea levels affect drainage patterns within the City as stormwater flows toward the Bay. Problematic flood prone areas within the City include:
• Poet’s Corner
• Astrid Drive and Cleaveland Road
• I650 IC E Concord Avenue
• Monument Boulevard
Climate change presents a threat to the City’s underserved population demanding a comprehensive and equitable approach to address its impacts and ensure a just and sustainable future for all Pleasant Hill residents. Certain identified groups in Pleasant Hill are more vulnerable than others to the health impacts of climate change due to social and economic factors including income, education, language barriers, access to health care and housing. These factors could affect people’s ability to prepare and cope with climate change.

Low income households and residents living within senior housing and care facilities within the City of Pleasant Hill are disproportionately vulnerable to the effects of climate change due to a lack of resources and access to essential services. Residents of these groups may lack access to alternative water sources, making them reliant on the City’s public water system and more susceptible to shortages during droughts, heatwaves, infrastructure maintenance, and severe weather events. Their limited financial resources make it difficult to manage increased water and fuel costs, further increasing their risk during hazards related to climate change.

Additionally, these underserved populations may face limited access to cooling centers, healthcare, and financial assistance leaving them vulnerable to heat stress and other climate related health impacts.

Dam and Levee Failure
The Local Planning Team determined that the City does not have unique vulnerabilities and impacts to dam and levee failures; rather, the City’s vulnerability and impacts are consistent with those experienced throughout the County.

Drought
Droughts can lead to ecological disasters, lower groundwater levels. and reduce surface water quality and supply for the City of Pleasant Hill. The City of Pleasant Hill owns and operates Diablo Vista Water System, which purchases raw water from Contra Costa Water District (CCWD). The water is strictly used for irrigation for 474 homes within the Poet’s Corner area; however, is not a resource for the entire City. The City of Pleasant Hill residents are served by one (1) of the following three (3) water districts – East Bay Municipal Utility District, CCWD, or the City of Martinez Water District.

Impacts from drought can increase operations costs from all three (3) districts, reducing their revenue, and could increase costs for treated water for all residents within the City of Pleasant Hill. This can have prolonged effects on the underserved population within the City that is already struggling to pay their basic water bill and expose them to increase risk to their general health and wellbeing.
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Hazards Vulnerabilities and Impacts
Earthquake
The Concord, Franklin, and Southampton faults run directly through the City, and the Hayward, Calaveras, San Andreas, and Greenville faults are within 50 miles.

During an earthquake, Pleasant Hill is also susceptible to liquefaction, particularly on the eastern side of the City and along Grayson Creek.

Earthquakes are known for resulting in long term damage to buildings and infrastructure even after the initial disaster. Damage may occur to underground facilities and utilities, especially in the area of liquefaction, such as the eastern side of the City and along Grayson Creek. This damage could result in extended repairs for the entire City, including business owners. The City’s underserved populations, including low income families are at increased risk of earthquakes, as they may live in older homes that have not been seismically retrofitted. These homes could potentially take on more damage due to earthquakes and require more resources to rebuild post-earthquake. Providing temporary accommodations for the City’s underserved residents while they seek repair options could be challenging due to the extensive paperwork and documentation required to process their requests. Furthermore, the City’s vulnerable population would be competing with all residents to secure temporary housing, funding, and other resources in a short amount of time.

The highest probability of infrastructure damage includes the downtown area and Pleasant Hill Plaza.

Flood
(urban/flash flood, riverine/creek)
Precipitation in the Pleasant Hill area is expected to increase in the future due to climate change, with an estimated increase of 6.7 to 8.2 inches of rain annually by 2045. This increase in rainfall will inevitably result in additional stress on the stormwater system and flooding. Pleasant Hill is primarily susceptible to flooding on the eastern border of the City.

The 500-year floodplain extends the length of Grayson Creek from the northeastern edge of the City to the southeastern City limits. The northeastern City limits are also designated as a 100-year floodplain, with a small area in the 500-year floodplain just outside of the City limits. These areas are at greater risk from extreme floods in severe storms where Grayson Creek or Walnut Creek overflow.

Approximately 6% of the population resides in the Special Flood Hazard Area (SFHA) and 16% of the population resides in the 0.2% chance flood hazard area.

Problematic flood prone areas include:
• Poet’s Corner
• Astrid Drive and Cleaveland Road
• I650 IC E Concord Avenue
• Monument Boulevard
Vulnerable residents living in these areas are at increased risk of being isolated in their homes without the appropriate resources to evacuate or access emergency services. The City does have three (3) sandbag locations and is well stocked with sand, bags and shovels. The City will also provide pre-filled sandbags those residents unable to fill their own.
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Hazards Vulnerabilities and Impacts
Landslides
Areas prone to landslides include Reliez Valley and Taylor Boulevard.

Vulnerable residents, such as the elderly and those with access a functional needs, living in areas highly prone to landslides are at an increased risk of being isolated in their homes without the appropriate resources to evacuate or access emergency services.

Sea Level Rise
The Local Planning Team determined that the City does not have unique vulnerabilities and impacts to sea level rise; rather, the City’s vulnerability and impacts are consistent with those experienced throughout the County.

Severe Weather
(heavy rainfall, severe
thunderstorms, strong
winds/damaging winds, heat
wave/extreme heat, tornado)
The Local Planning Team determined that the City does not have unique vulnerabilities and impacts to severe weather; rather, the City’s vulnerability and impacts are consistent with those experienced throughout the County.

Tsunami
The Local Planning Team determined that the City does not have unique vulnerabilities and impacts to tsunamis; rather, the City’s vulnerability and impacts are consistent with those experienced throughout the County.

Wildfire
While Pleasant Hill is not located directly in a high Fire Hazard Severity Zone (FHSZ), as identified by the California Department of Forestry and Fire Protection (Cal Fire), high or very high FHSZ are located to the north, east, and south of the City. Pleasant Hill’s proximity to Briones Regional Park and other open, undeveloped land poses a threat of wildland fires spreading near and into the City limits where the park and open space abuts urban development to the southwest.

Low income households within the City are at increased financial hardship in acquiring and managing permits and building projects (e.g., wildfire mitigation) making them less likely to take proactive measures before a wildfire occurs. In addition, the hardship of designating emergency supplies, emergency communication lines and evacuation planning in general is higher for these residents in times of disaster due to the financial components and existing language barriers.

Active Shooter Incidents
The Local Planning Team determined that the City does not have unique vulnerabilities and impacts to active shooter incidents; rather, the City’s vulnerability and impacts are consistent with those experienced throughout the County.

Cybersecurity Threats
The Local Planning Team determined that the City does not have unique vulnerabilities and impacts to cybersecurity threats; rather, the City’s vulnerability and impacts are consistent with those experienced throughout the County.

Hazardous Materials
Incidents
The Local Planning Team determined that the City does not have unique vulnerabilities and impacts to hazardous materials incidents; rather, the City’s vulnerability and impacts are consistent with those experienced throughout the County.

Terrorism (Weapons of
Mass Destruction)
The Local Planning Team determined that the City does not have unique vulnerabilities and impacts to terrorism; rather, the City’s vulnerability and impacts are consistent with those experienced throughout the County.

Utility Interruptions
The Local Planning Team determined that the City does not have unique vulnerabilities and impacts to utility interruptions; rather, the City’s vulnerability and impacts are consistent with those experienced throughout the County.

The City evaluated whether vulnerability and impact in hazard prone areas had increased, decreased, or remained the same for each natural hazard identified in this Hazard Mitigation Plan. Climate change, 2024 Hazard Mitigation Plan
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City of Pleasant Hill Annex 23
changes in population, infrastructure expansion, and economic shifts that can affect vulnerability were considered. For example, if planned development is in an identified hazard areas or is not built to the updated building codes, it may increase the community’s vulnerability to future hazards and disasters.

On the other hand, if development occurred with mitigation practices in place, the vulnerability may have remained the same or decreased. Additionally, shifting demographics (e.g., underserved population) were taken into consideration.

Table 15 outlines if climate change has increased or decreased the City’s vulnerability (i.e., exposure) and impact to each natural hazard over the past five (5) years, and the effect of climate change in the future probability of occurrence and impacts from each natural hazard.

Table 15. Climate Change Current and Future Vulnerability and Impact Hazard Vulnerability and Impact
Current Vulnerability and Impact
Climate Change Remained the Same
Dam and Levee Failure Remained the Same
Drought Remained the Same
Earthquake Remained the Same
Flood (urban/flash flood, riverine/creek) Remained the Same Landslide Remained the Same
Sea Level Rise Remained the Same
Severe Weather (heavy rainfall, severe thunderstorms, strong winds/damaging winds, heat wave/extreme heat, tornado) Remained the Same Tsunami Remained the Same
Wildfire Remained the Same
Future Vulnerability and Impact
Climate Change No Change is Anticipated
Dam and Levee Failure No Change is Anticipated
Drought No Change is Anticipated
Earthquake No Change is Anticipated
Flood (urban/flash flood, riverine/creek) No Change is Anticipated Landslide No Change is Anticipated
Sea Level Rise No Change is Anticipated
Severe Weather (heavy rainfall, severe thunderstorms, strong winds/damaging winds, heat wave/extreme heat, tornado) No Change is Anticipated Tsunami No Change is Anticipated
Wildfire No Change is Anticipated
Table 16 outlines if changes in population within the City over the past five (5) years have increased or decreased the vulnerability (i.e., exposure) and impact to these natural hazards, and the anticipated 2024 Hazard Mitigation Plan
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City of Pleasant Hill Annex 24
effects changes in population may have on the future probability of occurrence and impacts from these natural hazards.

Table 16. Changes in Population Current and Future Vulnerability and Impact Hazard Vulnerability and Impact
Current Vulnerability and Impact
Climate Change Remained the Same
Dam and Levee Failure Remained the Same
Drought Remained the Same
Earthquake Remained the Same
Flood (urban/flash flood, riverine/creek) Remained the Same Landslide Remained the Same
Sea Level Rise Remained the Same
Severe Weather (heavy rainfall, severe thunderstorms, strong winds/damaging winds, heat wave/extreme heat, tornado) Remained the Same Tsunami Remained the Same
Wildfire Remained the Same
Future Vulnerability and Impact
Climate Change No Change is Anticipated
Dam and Levee Failure No Change is Anticipated
Drought No Change is Anticipated
Earthquake No Change is Anticipated
Flood (urban/flash flood, riverine/creek) No Change is Anticipated Landslide No Change is Anticipated
Sea Level Rise No Change is Anticipated
Severe Weather (heavy rainfall, severe thunderstorms, strong winds/damaging winds, heat wave/extreme heat, tornado) No Change is Anticipated Tsunami No Change is Anticipated
Wildfire No Change is Anticipated
Table 17 outlines if development over the past five (5) years has increased or decreased the jurisdiction’s vulnerability (i.e., exposure) and impact to these natural hazards, and the anticipated effects changes in development may have on the future probability of occurrence and impacts from these natural hazards.

Table 17. Changes in Development Current and Future Vulnerability and Impact Hazard Vulnerability and Impact
Current Vulnerability and Impact
Climate Change Remained the Same
Dam and Levee Failure Remained the Same
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City of Pleasant Hill Annex 25
Hazard Vulnerability and Impact
Drought Remained the Same
Earthquake Remained the Same
Flood (urban/flash flood, riverine/creek) Remained the Same Landslide Remained the Same
Sea Level Rise Remained the Same
Severe Weather (heavy rainfall, severe thunderstorms, strong winds/damaging winds, heat wave/extreme heat, tornado) Remained the Same Tsunami Remained the Same
Wildfire Remained the Same
Future Vulnerability and Impact
Climate Change No Change is Anticipated
Dam and Levee Failure No Change is Anticipated
Drought No Change is Anticipated
Earthquake No Change is Anticipated
Flood (urban/flash flood, riverine/creek) No Change is Anticipated Landslide No Change is Anticipated
Sea Level Rise No Change is Anticipated
Severe Weather (heavy rainfall, severe thunderstorms, strong winds/damaging winds, heat wave/extreme heat, tornado) No Change is Anticipated Tsunami No Change is Anticipated
Wildfire No Change is Anticipated
See Table 4 for anticipated future major assets that may be exposed or vulnerable to any of the natural hazards identified in this Hazard Mitigation Plan. Any new assets (e.g., new construction in hazard prone areas) will be constructed to adhere to the latest building codes and standards, and mitigation to protect them from identified and anticipated hazards, especially those that are expected to increase due to climate change.

Refer to Appendix C and Appendix D of this Annex for the hazard risk assessment methodology and jurisdiction specific details, which includes the vulnerability and impacts to population and life safety, underserved/equity, property damage, future development, and climate change.

9.1. FEMA National Risk Index
In the National Risk Index (NRI), risk is defined as the potential for negative impacts as a result of a natural hazard. The Risk Index is based on three (3) components – a natural hazards component (Expected Annual Loss), a consequence enhancing component (Social Vulnerability), and a consequence reduction component (Community Resilience). Using these components, the composite and hazard type Risk Index values are calculated for each community (county and Census Tract). Risk Index values form an absolute basis for measuring Risk within the NRI and are used to generate Risk 2024 Hazard Mitigation Plan
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City of Pleasant Hill Annex 26
Index percentiles and ratings across communities.4 Table 18 illustrates the Risk Index rating and score for the City of Pleasant Hill.

Table 18. Risk Index Score (FEMA National Risk Index)
Jurisdiction Rating Score
City of Pleasant Hill Very High 92.1
Risk Index scores are calculated using an equation that combines scores for Expected Annual Loss due to natural hazards, Social Vulnerability and Community Resilience (Expected Annual Loss x Social Vulnerability / Community Resilience = Risk Index).

9.1.1. Expected Annual Loss
The FEMA NRI Expected Annual Loss (EAL), the natural hazards component of the NRI, represents the average economic loss in dollars resulting from natural hazards each year. It is calculated for each hazard type and quantifies loss for relevant consequence types – buildings, people, and agriculture. The EAL score and rating represent a community's relative level of expected losses each year when compared to all other communities at the same level. Since the score is associated to a community’s risk; the higher EAL score results in a higher Risk Index score.5 Table 19 illustrates each hazard EAL for the City of Pleasant Hill.

Table 19. Expected Annual Loss (FEMA National Risk Index) Hazard Population
Equivalence
Building
Value
Agriculture
Value
Total
Expected
Annual
Loss
Expected
Annual
Loss
Score
Rating
Coastal Flooding
(Sea Level Rise) $0 $0 n/a $0 0.0
No
Expected
Annual
Losses
Drought n/a n/a $29 $29 21.8 Relatively
Low
Earthquake $1.2 Million $2.3 Million n/a $3.5 Million 98.3 Very High Hail
(Severe Weather) $50 $233 $0 $283 28.9 Relatively
Low
Heat Wave
(Severe Weather) $12,456 $3 $0 $12,459 57.9 Relatively
Moderate
Landslide $84 $769 n/a $852 46.3 Relatively
Moderate
Riverine Flooding
(Flood) $39,081 $25,639 $0 $64,720 58.9 Relatively
Moderate
4 Federal Emergency Management Agency. (2023). Determining Risk. Retrieved from https://hazards.fema.gov/nri/determining-risk. 5 Federal Emergency Management Agency. (2023). Expected Annual Loss. Retrieved from https://hazards.fema.gov/nri/expected-annual-loss.
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Hazard Population
Equivalence
Building
Value
Agriculture
Value
Total
Expected
Annual
Loss
Expected
Annual
Loss
Score
Rating
Strong Winds
(Severe Weather) $64 $27 $0 $91 5.6 Very Low
Tornado
(Severe Weather) $1,740 $5,056 $0 $6,796 19.2 Very Low
Tsunami $0 $0 n/a $0 0.0
No
Expected
Annual
Losses
Wildfire $163 $4,316 $0 $4,479 17.9 Very Low
Expected annual loss scores are calculated utilizing an equation that combines values for exposure, annualized frequency, and historic loss ratios (Expected Annual Loss = Exposure x Annualized Frequency x Historic Loss Ratio).

An EAL score and rating is calculated independently for each consequence type (i.e., buildings, population, and agriculture) for each county and Census Tract. The population EAL is measured in fatalities and injuries while the building and agriculture values are measured in dollars. However, for consistency in the unit of measurement, the population EAL was monetized into population equivalence using a value of statistical life (VSL) approach where each fatality or 10 injuries is treated as $11.6 Million of economic loss.

9.1.2. Social Vulnerability
Social vulnerability, the consequence enhancing risk component of the NRI, measures the susceptibility of social groups to the adverse impacts of natural hazards, including disproportionate death, injury, loss, or disruption of livelihood. The Social Vulnerability score and rating represent the relative level of a community’s social vulnerability compared to all other communities at the same level. A higher Social Vulnerability score results in a higher Risk Index score.6 Table 20 illustrates the Social Vulnerability rating and score for City of Pleasant Hill.

Table 20. Social Vulnerability (FEMA National Risk Index) Jurisdiction Rating Score
City of Pleasant Hill Relatively Moderate 41.2
Social Vulnerability is measured using the Social Vulnerability Index (SoVI) published by the University of South Carolina’s Hazards and Vulnerability Research Institute (HVRI).

9.1.3. Community Resilience
Community resilience, the consequence reduction risk component, measures the ability of a community to prepare for anticipated natural hazards, adapt to changing conditions, and withstand and recover rapidly from disruptions. The Community Resilience score and rating represent the relative level of a community’s resilience compared to all other communities at the same level. Since the score is inversely 6 Federal Emergency Management Agency. (2023). Social Vulnerability. Retrieved from https://hazards.fema.gov/nri/social-vulnerability.
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City of Pleasant Hill Annex 28
proportional to a community’s risk; the higher Community Resilience score results in a lower Risk Index score.7 Table 21 illustrates the Community Resilience rating and score for the City of Pleasant Hill.

Table 21. Community Resilience (FEMA National Risk Index) Jurisdiction Rating Score
City of Pleasant Hill Relatively High 66.4
Community Resilience is measured using the Baseline Resilience Indicators for Communities (HVRI BRIC) published by the University of South Carolina's Hazards and Vulnerability Research Institute (HVRI).

9.1.4. Annualized Frequency
Annualized frequency is defined as the expected frequency or probability of a hazard occurrence per year. It is a natural hazard incidence factor for Expected Annual Loss, the natural hazards component of the National Risk Index. A higher annualized frequency value results in higher Expected Annual Loss and Risk Index scores. The annualized frequency is derived from either the number of recorded hazard occurrences each year over a given period or the modeled probability of a hazard occurrence each year (e.g., earthquake).
8 Table 22 outlines the annualized frequency for each hazard, based on FEMA NRI data, for the City of Pleasant Hill.

Table 22. Hazard Annualized Frequency (FEMA National Risk Index) Hazard Period of Record Events on Record Annualized Frequency Coastal Flooding
(Sea Level Rise) Various datasets n/a 0.0 events per year Drought 22 years 1,044 47.5 events per year
Earthquake 2021 dataset n/a 0.010% chance per year
Hail
(Severe Weather) 34 years 2 0.0 events per year
Heat Wave
(Severe Weather) 16 years 30 1.9 events per year
Landslide 12 years 0 0.0 events per year
Riverine Flooding
(Flood) 24 years 31 1.3 events per year
Strong Winds
(Severe Weather) 34 years 2 0.0 events per year
Tornado
(Severe Weather) 72 years 0 0.0 events per year
Tsunami 222 years 0 0.0 events per year
Wildfire 2021 dataset n/a 0.0% events per year

10. HAZARD RISK RANKING
Table 23 presents the local hazard ranking for the City of Pleasant Hill of all hazards of concern listed in Volume 1 (Planning Area-wide Elements) of this Plan. This ranking summarizes how hazards vary for this jurisdiction. As described in detail in Volume 1 (Planning Area-wide Elements) and Appendix C 7 Federal Emergency Management Agency. (2023). Community Resilience. Retrieved from https://hazards.fema.gov/nri/community-resilience. 8 Federal Emergency Management Agency. (2023). Annualized Frequency. Retrieved from https://hazards.fema.gov/nri/annualized-frequency.
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City of Pleasant Hill Annex 29
of this Annex, the ranking process involves an assessment of the likelihood of occurrence for each hazard, along with its potential impacts on people, property, and the economy. For further details on how the probability, extent, vulnerability, and impact factors in Table 23 were calculated, please refer to Appendix D of this Annex.

It is important to note that the sub hazards for severe weather hazards (i.e., heavy rainfall, severe thunderstorms, strong winds/damaging winds, heat wave/extreme heat, and tornado) and flood hazards (i.e., riverine/creek flooding and urban/flash flooding) were individually ranked in the hazard risk ranking; however, flood and severe weather are each considered as the main hazard throughout this Annex and Volume 1 (Planning Area-wide Elements).

Table 23. Hazard Risk Ranking
Hazard Event Probability
Factor
Sum of
Weighted
Extent
Factors
Sum of
Weighted
Vulnerability
Factors
Sum of
Weighted
Impact
Factors
Consequence
Score
Total Risk Score
(Probability x
Consequence)
Earthquake 2 18 17 36 71 68
Heavy Rain 3 9 14 15 38 56
Flood
(Urban/Flash Flood) 2 15 12 29 56 55
Strong Winds/
Damaging Winds
(Severe Weather)
3 9 11 16 36 54
Severe Thunderstorm
(Severe Weather) 3 6 16 14 36 54
Utility Interruptions 3 9 7 18 34 51
Heat Wave/Extreme
Heat 3 9 10 15 34 51
Drought 2 18 12 20 50 50
Wildfire 2 9 12 27 48 48
Flood
(Riverine/Creek) 2 12 7 27 46 47
Hazardous Materials
Incidents 2 15 9 16 40 41
Landslide 2 9 9 20 38 40
Climate Change 2 9 12 15 36 38
Cybersecurity
Threats 2 12 7 13 32 34
Active Shooter
Incidents 2 9 5 15 29 32
Terrorism
(Weapons of mass
Destruction)
1 18 11 27 56 31
Dam and Levee
Failure 1 15 6 26 47 26
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City of Pleasant Hill Annex 30
Hazard Event Probability
Factor
Sum of
Weighted
Extent
Factors
Sum of
Weighted
Vulnerability
Factors
Sum of
Weighted
Impact
Factors
Consequence
Score
Total Risk Score
(Probability x
Consequence)
Tornado
(Severe Weather) 1 6 6 14 26 16
Sea Level Rise 1 0 1 6 7 5
Tsunami 0 0 0 1 1 0
Consequence: Sum of all weighted factors.

Extent: Sum of the weighted Extent factors.

Vulnerability: Sum of the weighted Vulnerability factors.

Impact: Sum of the weighted Impact factors.

Total Risk Score* = Probability x Consequence
* Normalized to 100
Total Risk Score Legend
Classification Probability
Factor Extent Vulnerability Impact ConsequenceScore
Total Risk
Score
Low (L) 1 0 – 6 0 – 6 0 – 12 0 – 24 0 – 24
Medium (M) 2 7 – 12 7 – 12 13 – 26 25 – 50 25 – 54
High (H) 3 13 – 18 13 – 18 27 – 39 51 – 75 55 and above The legend—specifically the assignment of low, medium, and high—provides an additional means to qualitatively assess the probability factor, sum of weighted factors, and the total risk scores for each hazard. The Consequence Score represents the sum of the Extent, Vulnerability, and Impact Factors. The Total Risk Score is a measure of Probability and Consequence.
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City of Pleasant Hill Annex 31

11. MITIGATION ACTIONS
This section includes the mitigation actions that were developed to address identified risks and vulnerabilities to hazards identified in this Plan. This Plan serves only to recommend mitigation measures based on the potential for risk reduction and available funding. Implementation of mitigation actions is dependent on risk reduction priorities, feasibility, and available funding. It is also dependent on the cooperation and support of the jurisdiction and/or department responsible for each action item.

The City of Pleasant Hill agreed upon 27 mitigation actions that apply to the jurisdiction’s properties where they have jurisdictional responsibility and authority. Two (2) mitigation actions were completed. A summary of the City’s mitigation actions status is listed in Table 24.

Table 24. City of Pleasant Hill Mitigation Actions Summary Status Mitigation Action Total
Ongoing 15
In Progress/In Work 6
Not Started 4
Delayed/Deferred 0
New 2
TOTAL 27
Completed 2
Deleted/No Longer Needed 0
Mitigation Actions per Hazard
Climate Change 5 Landslide 8
Dam and Levee Failure 11 Sea Level Rise 6
Drought 5 Severe Weather 11
Earthquake 12 Tsunami 4
Flood 22 Wildfire 9
These shared actions, some of which address all hazards, help to meet the following requirements:
• Does the Plan identify and analyze a comprehensive range of specific mitigation actions and projects for each jurisdiction being considered to reduce the effects of hazards, with emphasis on new and existing buildings and infrastructure?
• Does the Plan include one (1) or more action(s) per jurisdiction for each hazard identified within the risk assessment?
A detailed explanation of the Mitigation Strategy can be found in Chapter 5 of Volume 1 (Planning Areawide Elements). 2024 Hazard Mitigation Plan
Contra Costa County, California
City of Pleasant Hill Annex 32
Mitigation
Action
Where appropriate, support retrofitting or relocation of structures in high hazard areas, prioritizing structures that have experienced repetitive losses.

Action Number PH-1
Year Initiated /
Anticipated Year
of Initiation
2011 Prioritization Score Medium
Goal(s) / Objective(s) Addressed
Goals: 1, 2, 3, 4, 5
Objectives: 1, 4, 7, 9,
12, 14, 15, 17
Hazard(s) Mitigated
Climate Change, Dam and Levee Failure,
Drought, Earthquake, Flood, Landslide, Sea Level
Rise, Severe Weather, Tsunami, Wildfire
Project Status Ongoing If Deleted/No Longer
Needed, provide reason. N/A
Benefits
(Loss Avoided) High
Lead Agency / Organization City of Pleasant Hill Community Development Department
Supporting Agency
/ Organization
(If applicable)
N/A
Additional Participating
Jurisdictions (If applicable)
N/A
Project Duration Short Term Estimated Cost High
Potential Funding Source HMGP, FMA, BRIC
If Other, you must
identify a funding source. N/A
Please provide further
detail on Potential
Funding Source.

N/A
Implementation Priority Medium Integration Ideas
(Optional)
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City of Pleasant Hill Annex 33
Mitigation
Action
Integrate the Hazard Mitigation Plan into other City plans, ordinances, and programs that dictate land use decisions in the community, including the General Plan.

Action Number PH-2
Year Initiated /
Anticipated Year
of Initiation
2011 Prioritization Score High
Goal(s) / Objective(s) Addressed
Goals: 1, 2, 3, 4, 5
Objectives: 1, 4, 5, 7,
11, 12, 14, 17
Hazard(s) Mitigated
Climate Change, Dam and Levee Failure,
Drought, Earthquake, Flood, Landslide, Sea Level
Rise, Severe Weather, Tsunami, Wildfire
Project Status Ongoing If Deleted/No Longer
Needed, provide reason. N/A
Benefits
(Loss Avoided) Medium
Lead Agency / Organization City of Pleasant Hill Community Development Department
Supporting Agency
/ Organization
(If applicable)
N/A
Additional Participating
Jurisdictions (If applicable)
N/A
Project Duration Ongoing Estimated Cost Low
Potential Funding Source Local Budgeted Funds
If Other, you must
identify a funding source. N/A
Please provide further
detail on Potential
Funding Source.

General Fund (Staff Time)
Implementation Priority High Integration Ideas
(Optional)
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City of Pleasant Hill Annex 34
Mitigation
Action
Actively participate in the Hazard Mitigation Plan maintenance protocols outlined in Volume 1 of the Contra Costa County Hazard Mitigation Plan.

Action Number PH-3
Year Initiated /
Anticipated Year
of Initiation
2011 Prioritization Score High
Goal(s) / Objective(s) Addressed Goals: 1, 2, 3, 4, 5
Objectives: 3, 8, 16 Hazard(s) Mitigated
Climate Change, Dam and Levee Failure,
Drought, Earthquake, Flood, Landslide, Sea Level
Rise, Severe Weather, Tsunami, Wildfire
Project Status Ongoing If Deleted/No Longer
Needed, provide reason. N/A
Benefits
(Loss Avoided) Low
Lead Agency / Organization City of Pleasant Hill Community Development Department
Supporting Agency
/ Organization
(If applicable)
N/A
Additional Participating
Jurisdictions (If applicable)
N/A
Project Duration Short Term Estimated Cost Low
Potential Funding Source Local Budgeted Funds
If Other, you must
identify a funding source. N/A
Please provide further
detail on Potential
Funding Source.

General Fund (Staff Time)
Implementation Priority High Integration Ideas
(Optional)
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City of Pleasant Hill Annex 35
Mitigation
Action
Continue to maintain good standing and compliance under the National Flood Insurance Program (NFIP) through implementation of floodplain management programs that, at a minimum, meet the NFIP requirements. These include:
• Enforce the flood damage prevention ordinance.
• Participate in floodplain identification and mapping updates. • Provide public assistance/information on floodplain requirements and impacts.

Action Number PH-4
Year Initiated /
Anticipated Year
of Initiation
2011 Prioritization Score High
Goal(s) / Objective(s) Addressed
Goals: 1, 2, 3, 4, 5
Objectives: 3, 5, 6, 9,
10, 11, 15
Hazard(s) Mitigated Flood
Project Status Ongoing If Deleted/No Longer
Needed, provide reason. N/A
Benefits
(Loss Avoided) Medium
Lead Agency / Organization City of Pleasant Hill Community Development Department
Supporting Agency
/ Organization
(If applicable)
N/A
Additional Participating
Jurisdictions (If applicable)
N/A
Project Duration Ongoing Estimated Cost Low
Potential Funding Source Local Budgeted Funds
If Other, you must
identify a funding source. N/A
Please provide further
detail on Potential
Funding Source.

Action Number PH-5
Year Initiated /
Anticipated Year
of Initiation
2018 Prioritization Score Medium
Goal(s) / Objective(s) Addressed Goals: 1, 2, 3, 4, 5
Objectives: 5, 6, 11 Hazard(s) Mitigated Flood
Project Status Ongoing If Deleted/No Longer
Needed, provide reason. N/A
Benefits
(Loss Avoided) Medium
Lead Agency / Organization City of Pleasant Hill Community Development Department
Supporting Agency
/ Organization
(If applicable)
N/A
Additional Participating
Jurisdictions (If applicable)
N/A
Project Duration Ongoing Estimated Cost Low
Potential Funding Source Local Budgeted Funds
If Other, you must
identify a funding source. N/A
Please provide further
detail on Potential
Funding Source.

Action Number PH-6
Year Initiated /
Anticipated Year
of Initiation
2011 Prioritization Score Low
Goal(s) / Objective(s) Addressed Goals: 1, 2, 3, 4, 5
Objectives: 1, 2, 6 Hazard(s) Mitigated Earthquake, Landslide Project Status In Progress/In Work If Deleted/No Longer Needed, provide reason. N/A
Benefits
(Loss Avoided) Medium
Lead Agency / Organization City of Pleasant Hill Community Development Department
Supporting Agency
/ Organization
(If applicable)
N/A
Additional Participating
Jurisdictions (If applicable)
N/A
Project Duration Long Term Estimated Cost High
Potential Funding Source Local Budgeted Funds
If Other, you must
identify a funding source. N/A
Please provide further
detail on Potential
Funding Source.

General Fund (Staff Time)
Implementation Priority Low Integration Ideas
(Optional)
2024 Hazard Mitigation Plan
Contra Costa County, California
City of Pleasant Hill Annex 38
Mitigation
Action Install earthquake-resistant connections when pipes enter and exit bridges.

Action Number PH-7
Year Initiated /
Anticipated Year
of Initiation
2011 Prioritization Score Medium
Goal(s) / Objective(s) Addressed Goals: 1, 2, 3, 4, 5
Objectives: 1, 17 Hazard(s) Mitigated Earthquake
Project Status In Progress/In Work If Deleted/No Longer Needed, provide reason. N/A
Benefits
(Loss Avoided) Medium
Lead Agency / Organization City of Pleasant Hill Community Development Department
Supporting Agency
/ Organization
(If applicable)
N/A
Additional Participating
Jurisdictions (If applicable)
N/A
Project Duration Long Term Estimated Cost Medium
Potential Funding Source Local Budgeted Funds
If Other, you must
identify a funding source. N/A
Please provide further
detail on Potential
Funding Source.

General Fund (Staff Time)
Implementation Priority Medium Integration Ideas
(Optional)
2024 Hazard Mitigation Plan
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City of Pleasant Hill Annex 39
Mitigation
Action Ensure a reliable source of water for fire suppression Action Number PH-8
Year Initiated /
Anticipated Year
of Initiation
2011 Prioritization Score High
Goal(s) / Objective(s) Addressed Goals: 1, 2, 3, 4, 5
Objectives: 2, 16 Hazard(s) Mitigated Wildfire
Project Status Ongoing If Deleted/No Longer
Needed, provide reason. N/A
Benefits
(Loss Avoided) High
Lead Agency / Organization Contra Costa Water District
Supporting Agency
/ Organization
(If applicable)
N/A
Additional Participating
Jurisdictions (If applicable)
N/A
Project Duration Short Term Estimated Cost Medium
Potential Funding Source Local Budgeted Funds
If Other, you must
identify a funding source. N/A
Please provide further
detail on Potential
Funding Source.

Water District General Funds
Implementation Priority High Integration Ideas
(Optional)
2024 Hazard Mitigation Plan
Contra Costa County, California
City of Pleasant Hill Annex 40
Mitigation
Action Develop and implement a defensible space vegetation program.

Action Number PH-9
Year Initiated /
Anticipated Year
of Initiation
2011 Prioritization Score High
Goal(s) / Objective(s) Addressed Goals: 1, 3, 5
Objectives: 3, 5 Hazard(s) Mitigated Wildfire
Project Status Ongoing If Deleted/No Longer
Needed, provide reason. N/A
Benefits
(Loss Avoided) High
Lead Agency / Organization Contra Costa County Fire
Protection District
Supporting Agency
/ Organization
(If applicable)
N/A
Additional Participating
Jurisdictions (If applicable)
N/A
Project Duration Short Term Estimated Cost Low
Potential Funding Source Local Budgeted Funds
If Other, you must
identify a funding source. N/A
Please provide further
detail on Potential
Funding Source.

General Fund (Staff Time)
Implementation Priority High Integration Ideas
(Optional)
2024 Hazard Mitigation Plan
Contra Costa County, California
City of Pleasant Hill Annex 41
Mitigation
Action Retrofit access roads to ensure fire equipment has adequate access to sites.

Action Number PH-10
Year Initiated /
Anticipated Year
of Initiation
2026 Prioritization Score Medium
Goal(s) / Objective(s) Addressed Goals: 1, 2, 3, 4, 5
Objectives: 1, 2, 16 Hazard(s) Mitigated Wildfire
Project Status Not Started If Deleted/No Longer
Needed, provide reason.

N/A
Benefits
(Loss Avoided) Medium
Lead Agency / Organization Contra Costa County Fire
Protection District
Supporting Agency
/ Organization
(If applicable)
N/A
Additional Participating
Jurisdictions (If applicable)
N/A
Project Duration Short Term Estimated Cost Low
Potential Funding Source Local Budgeted Funds
If Other, you must
identify a funding source. N/A
Please provide further
detail on Potential
Funding Source.

Action Number PH-11
Year Initiated /
Anticipated Year
of Initiation
2011 Prioritization Score Medium
Goal(s) / Objective(s) Addressed Goals: 1, 2, 3, 4, 5
Objectives: 3, 6 Hazard(s) Mitigated Drought, Earthquake, Flood, Landslide, Severe Weather, Wildfire
Project Status Ongoing If Deleted/No Longer
Needed, provide reason. N/A
Benefits
(Loss Avoided) Low
Lead Agency / Organization City of Pleasant Hill Community Development Department
Supporting Agency
/ Organization
(If applicable)
N/A
Additional Participating
Jurisdictions (If applicable)
N/A
Project Duration Short Term Estimated Cost Low
Potential Funding Source Local Budgeted Funds, Other
If Other, you must
identify a funding source.

National Pollutant Discharge Elimination System
(NPDES) Tax
Please provide further
detail on Potential
Funding Source.

General Fund (Staff Time)
Implementation Priority Medium Integration Ideas
(Optional)
2024 Hazard Mitigation Plan
Contra Costa County, California
City of Pleasant Hill Annex 43
Mitigation
Action
Conduct a watershed analysis of runoff and drainage systems to identify areas of insufficient capacity in the storm drain and natural creek system.

Action Number PH-12
Year Initiated /
Anticipated Year
of Initiation
2011 Prioritization Score Medium
Goal(s) / Objective(s) Addressed Goals: 1, 2, 3, 4, 5
Objectives: 6, 16, 17 Hazard(s) Mitigated Flood
Project Status In Progress/In Work If Deleted/No Longer Needed, provide reason. N/A
Benefits
(Loss Avoided) Low
Lead Agency / Organization City of Pleasant Hill Community Development Department
Supporting Agency
/ Organization
(If applicable)
N/A
Additional Participating
Jurisdictions (If applicable)
N/A
Project Duration Short Term Estimated Cost High
Potential Funding Source Local Budgeted Funds, HMGP,
FMA, Other
If Other, you must
identify a funding source.

United States Army Corps of Engineers (USACE)
Grant
Please provide further
detail on Potential
Funding Source.

Action Number PH-13
Year Initiated /
Anticipated Year
of Initiation
2011 Prioritization Score Medium
Goal(s) / Objective(s) Addressed Goals: 2, 3, 4, 5
Objectives: 1, 10 Hazard(s) Mitigated Dam and Levee Failure, Flood Project Status In Progress/In Work If Deleted/No Longer Needed, provide reason. N/A
Benefits
(Loss Avoided) Medium
Lead Agency / Organization City of Pleasant Hill Community Development Department
Supporting Agency
/ Organization
(If applicable)
Contra Costa County Flood Control and Water
Conservation District
Additional Participating
Jurisdictions (If applicable)
N/A
Project Duration Short Term Estimated Cost Medium
Potential Funding Source HMGP, FMA, BRIC, Other
If Other, you must
identify a funding source.

National Pollutant Discharge Elimination System
(NPDES) Tax
Please provide further
detail on Potential
Funding Source.

N/A
Implementation Priority Medium Integration Ideas
(Optional)
2024 Hazard Mitigation Plan
Contra Costa County, California
City of Pleasant Hill Annex 45
Mitigation
Action Continue maintenance efforts to keep storm drains and creeks free of obstructions.

Action Number PH-14
Year Initiated /
Anticipated Year
of Initiation
2011 Prioritization Score Medium
Goal(s) / Objective(s) Addressed Goals: 2, 3, 4, 5
Objectives: 1, 10 Hazard(s) Mitigated Dam and Levee Failure, Flood Project Status Ongoing If Deleted/No Longer
Needed, provide reason. N/A
Benefits
(Loss Avoided) Medium
Lead Agency / Organization City of Pleasant Hill Public Works Department
Supporting Agency
/ Organization
(If applicable)
N/A
Additional Participating
Jurisdictions (If applicable)
N/A
Project Duration Short Term Estimated Cost Medium
Potential Funding Source Local Budgeted Funds, Other
If Other, you must
identify a funding source.

National Pollutant Discharge Elimination System
(NPDES) Tax
Please provide further
detail on Potential
Funding Source.

Action Number PH-15
Year Initiated /
Anticipated Year
of Initiation
2011 Prioritization Score Medium
Goal(s) / Objective(s) Addressed Goals: 1, 3, 5
Objectives: 5, 9 Hazard(s) Mitigated Flood
Project Status Ongoing If Deleted/No Longer
Needed, provide reason. N/A
Benefits
(Loss Avoided) Medium
Lead Agency / Organization City of Pleasant Hill Community Development Department
Supporting Agency
/ Organization
(If applicable)
N/A
Additional Participating
Jurisdictions (If applicable)
N/A
Project Duration Long Term Estimated Cost High
Potential Funding Source Local Budgeted Funds, Other
If Other, you must
identify a funding source.

National Pollutant Discharge Elimination System
(NPDES) Tax
Please provide further
detail on Potential
Funding Source.

General Fund (Staff Time)
Implementation Priority Medium Integration Ideas
(Optional)
2024 Hazard Mitigation Plan
Contra Costa County, California
City of Pleasant Hill Annex 47
Mitigation
Action Elevate critical bridges vulnerable to flooding to increase stream flow and maintain critical access and egress routes.

Action Number PH-16
Year Initiated /
Anticipated Year
of Initiation
2011 Prioritization Score Low
Goal(s) / Objective(s) Addressed Goals: 1, 2, 3, 4, 5
Objectives: 1, 15 Hazard(s) Mitigated Dam and Levee Failure, Flood Project Status Not Started If Deleted/No Longer
Needed, provide reason. N/A
Benefits
(Loss Avoided) High
Lead Agency / Organization City of Pleasant Hill Community Development Department
Supporting Agency
/ Organization
(If applicable)
N/A
Additional Participating
Jurisdictions (If applicable)
N/A
Project Duration Long Term Estimated Cost High
Potential Funding Source HMGP, FMA
If Other, you must
identify a funding source. N/A
Please provide further
detail on Potential
Funding Source.

N/A
Implementation Priority Low Integration Ideas
(Optional)
2024 Hazard Mitigation Plan
Contra Costa County, California
City of Pleasant Hill Annex 48
Mitigation
Action Provide a mechanism to expedite the repair or replacement of facilities protecting critical infrastructure.

Action Number PH-17
Year Initiated /
Anticipated Year
of Initiation
2011 Prioritization Score High
Goal(s) / Objective(s) Addressed Goals: 1, 2, 3, 4, 5
Objectives: 1, 15 Hazard(s) Mitigated Earthquake, Flood, Landslide, Severe Weather, Wildfire
Project Status Ongoing If Deleted/No Longer
Needed, provide reason. N/A
Benefits
(Loss Avoided) High
Lead Agency / Organization City of Pleasant Hill Community Development Department
Supporting Agency
/ Organization
(If applicable)
N/A
Additional Participating
Jurisdictions (If applicable)
N/A
Project Duration Short Term Estimated Cost Low
Potential Funding Source Local Budgeted Funds
If Other, you must
identify a funding source. N/A
Please provide further
detail on Potential
Funding Source.

General Fund (Staff Time)
Implementation Priority High Integration Ideas
(Optional)
2024 Hazard Mitigation Plan
Contra Costa County, California
City of Pleasant Hill Annex 49
Mitigation
Action Ensure that utility systems in new developments are constructed in ways that reduce or eliminate flood damage.

Action Number PH-18
Year Initiated /
Anticipated Year
of Initiation
2018 Prioritization Score Medium
Goal(s) / Objective(s) Addressed Goals: 1, 2, 3, 4, 5
Objectives: 1, 5, 16 Hazard(s) Mitigated Flood
Project Status Ongoing If Deleted/No Longer
Needed, provide reason. N/A
Benefits
(Loss Avoided) Medium
Lead Agency / Organization City of Pleasant Hill Community Development Department
Supporting Agency
/ Organization
(If applicable)
N/A
Additional Participating
Jurisdictions (If applicable)
N/A
Project Duration Short Term Estimated Cost Low
Potential Funding Source Local Budgeted Funds
If Other, you must
identify a funding source. N/A
Please provide further
detail on Potential
Funding Source.

Action Number PH-19
Year Initiated /
Anticipated Year
of Initiation
N/A Prioritization Score N/A
Goal(s) / Objective(s) Addressed Goals: 1, 2, 3, 4, 5
Objectives: 3, 6 Hazard(s) Mitigated Drought, Earthquake, Flood, Landslide, Severe Weather, Wildfire
Project Status Completed If Deleted/No Longer
Needed, provide reason. N/A
Benefits
(Loss Avoided) N/A
Lead Agency / Organization Contra Costa County GIS
Department
Supporting Agency
/ Organization
(If applicable)
N/A
Additional Participating
Jurisdictions (If applicable)
N/A
Project Duration N/A Estimated Cost N/A
Potential Funding Source N/A
If Other, you must
identify a funding source. N/A
Please provide further
detail on Potential
Funding Source.

N/A
Implementation Priority N/A Integration Ideas
(Optional)
2024 Hazard Mitigation Plan
Contra Costa County, California
City of Pleasant Hill Annex 51
Mitigation
Action Install back-up emergency power for critical intersection traffic lights.

Action Number PH-20
Year Initiated /
Anticipated Year
of Initiation
2011 Prioritization Score Medium
Goal(s) / Objective(s) Addressed Goals: 1, 2, 3, 4, 5
Objectives: 1, 13 Hazard(s) Mitigated Dam and Levee Failure, Earthquake, Flood, Severe Weather
Project Status In Progress/In Work If Deleted/No Longer Needed, provide reason. N/A
Benefits
(Loss Avoided) Medium
Lead Agency / Organization City of Pleasant Hill Community Development Department
Supporting Agency
/ Organization
(If applicable)
Contra Costa Transportation Authority
Additional Participating
Jurisdictions (If applicable)
N/A
Project Duration Long Term Estimated Cost Medium
Potential Funding Source Local Budgeted Funds
If Other, you must
identify a funding source. N/A
Please provide further
detail on Potential
Funding Source.

General Fund (Staff Time), Contra Costa
Transportation Authority Grants
Implementation Priority Medium Integration Ideas
(Optional)
2024 Hazard Mitigation Plan
Contra Costa County, California
City of Pleasant Hill Annex 52
Mitigation
Action Warehouse critical infrastructure components, and repair items.

Action Number PH-21
Year Initiated /
Anticipated Year
of Initiation
2011 Prioritization Score Low
Goal(s) / Objective(s) Addressed Goals: 1, 2, 3, 4, 5
Objectives: 13, 16 Hazard(s) Mitigated Dam and Levee Failure, Earthquake, Flood, Landslide, Severe Weather
Project Status In Progress/In Work If Deleted/No Longer Needed, provide reason. N/A
Benefits
(Loss Avoided) Medium
Lead Agency / Organization City of Pleasant Hill Public Works Department
Supporting Agency
/ Organization
(If applicable)
N/A
Additional Participating
Jurisdictions (If applicable)
N/A
Project Duration Short Term Estimated Cost High
Potential Funding Source Local Budgeted Funds, Other
If Other, you must
identify a funding source.

National Pollutant Discharge Elimination System
(NPDES) Tax
Please provide further
detail on Potential
Funding Source.

General Fund (Staff Time)
Implementation Priority Low Integration Ideas
(Optional)
2024 Hazard Mitigation Plan
Contra Costa County, California
City of Pleasant Hill Annex 53
Mitigation
Action Promote information sharing and coordination of mitigation efforts among local jurisdictions.

Action Number PH-22
Year Initiated /
Anticipated Year
of Initiation
2011 Prioritization Score Medium
Goal(s) / Objective(s) Addressed Goals: 1, 2, 3, 4, 5
Objectives: 6, 16 Hazard(s) Mitigated Dam and Levee Failure, Earthquake, Flood Project Status Ongoing If Deleted/No Longer
Needed, provide reason. N/A
Benefits
(Loss Avoided) Low
Lead Agency / Organization City of Pleasant Hill Public Works Department
Supporting Agency
/ Organization
(If applicable)
N/A
Additional Participating
Jurisdictions (If applicable)
N/A
Project Duration Short Term Estimated Cost Low
Potential Funding Source Local Budgeted Funds
If Other, you must
identify a funding source. N/A
Please provide further
detail on Potential
Funding Source.

Action Number PH-23
Year Initiated /
Anticipated Year
of Initiation
2011 Prioritization Score High
Goal(s) / Objective(s) Addressed Goals: 1, 3, 4, 5
Objectives: 3, 4, 9 Hazard(s) Mitigated Dam and Levee Failure, Flood, Severe Weather Project Status Ongoing If Deleted/No Longer
Needed, provide reason. N/A
Benefits
(Loss Avoided) Medium
Lead Agency / Organization City of Pleasant Hill Community Development Department
Supporting Agency
/ Organization
(If applicable)
N/A
Additional Participating
Jurisdictions (If applicable)
N/A
Project Duration Ongoing Estimated Cost Low
Potential Funding Source Local Budgeted Funds
If Other, you must
identify a funding source. N/A
Please provide further
detail on Potential
Funding Source.

General Fund (Staff Time)
Implementation Priority High Integration Ideas
(Optional)
2024 Hazard Mitigation Plan
Contra Costa County, California
City of Pleasant Hill Annex 55
Mitigation
Action Repair and retrofit bridges within the City.

Action Number PH-24
Year Initiated /
Anticipated Year
of Initiation
2026 Prioritization Score Medium
Goal(s) / Objective(s) Addressed Goals: 1, 2, 3, 4, 5
Objectives: 1, 15 Hazard(s) Mitigated Earthquake, Flood, Severe Weather Project Status Not Started If Deleted/No Longer
Needed, provide reason. N/A
Benefits
(Loss Avoided) High
Lead Agency / Organization City of Pleasant Hill Community Development Department
Supporting Agency
/ Organization
(If applicable)
N/A
Additional Participating
Jurisdictions (If applicable)
N/A
Project Duration Short Term Estimated Cost High
Potential Funding Source Local Budgeted Funds, HMGP,

FMA, BRIC
If Other, you must
identify a funding source. N/A
Please provide further
detail on Potential
Funding Source.

General Fund (Staff Time)
Implementation Priority Medium Integration Ideas
(Optional)
2024 Hazard Mitigation Plan
Contra Costa County, California
City of Pleasant Hill Annex 56
Mitigation
Action Conduct study and construct improvements at Ellinwood Creek Action Number PH-25
Year Initiated /
Anticipated Year
of Initiation
2026 Prioritization Score Medium
Goal(s) / Objective(s) Addressed Goals: 1, 2, 3, 4, 5
Objectives: 6, 10 Hazard(s) Mitigated Flood
Project Status Not Started If Deleted/No Longer
Needed, provide reason. N/A
Benefits
(Loss Avoided) Medium
Lead Agency / Organization City of Pleasant Hill Community Development Department
Supporting Agency
/ Organization
(If applicable)
N/A
Additional Participating
Jurisdictions (If applicable)
N/A
Project Duration Short Term Estimated Cost Low
Potential Funding Source HMGP, FMA, Other
If Other, you must
identify a funding source.

National Pollutant Discharge Elimination System
(NPDES) Tax
Please provide further
detail on Potential
Funding Source.

N/A
Implementation Priority Medium Integration Ideas
(Optional)
2024 Hazard Mitigation Plan
Contra Costa County, California
City of Pleasant Hill Annex 57
Mitigation
Action Obtain new permit tracking software to assist staff with documentation.

Action Number PH-26
Year Initiated /
Anticipated Year
of Initiation
N/A Prioritization Score N/A
Goal(s) / Objective(s) Addressed Goals: 1, 3, 5
Objectives: 4, 11 Hazard(s) Mitigated Earthquake, Flood, Landslide, Severe Weather Project Status Completed If Deleted/No Longer
Needed, provide reason. N/A
Benefits
(Loss Avoided) N/A
Lead Agency / Organization City of Pleasant Hill Community Development Department
Supporting Agency
/ Organization
(If applicable)
N/A
Additional Participating
Jurisdictions (If applicable)
N/A
Project Duration N/A Estimated Cost N/A
Potential Funding Source N/A
If Other, you must
identify a funding source. N/A
Please provide further
detail on Potential
Funding Source.

N/A
Implementation Priority N/A Integration Ideas
(Optional)
2024 Hazard Mitigation Plan
Contra Costa County, California
City of Pleasant Hill Annex 58
Mitigation
Action
Sponsor the formation of and training for a Community Emergency Response Teams (CERT) through partnerships with local businesses.

Action Number PH-27
Year Initiated /
Anticipated Year
of Initiation
2011 Prioritization Score Medium
Goal(s) / Objective(s) Addressed Goals: 1, 2, 3, 4, 5
Objectives: 2, 3, 16 Hazard(s) Mitigated
Dam and Levee Failure, Drought, Earthquake,
Flood, Landslide, Sea Level Rise, Severe
Weather, Tsunami, Wildfire
Project Status Ongoing If Deleted/No Longer
Needed, provide reason. N/A
Benefits
(Loss Avoided) Low
Lead Agency / Organization Contra Costa County Office of Emergency Services
Supporting Agency
/ Organization
(If applicable)
City of Pleasant Hill Police Department
Additional Participating
Jurisdictions (If applicable)
N/A
Project Duration Ongoing Estimated Cost Low
Potential Funding Source Local Budgeted Funds
If Other, you must
identify a funding source. N/A
Please provide further
detail on Potential
Funding Source.

General Fund (Staff Time)
Implementation Priority Medium Integration Ideas
(Optional)
2024 Hazard Mitigation Plan
Contra Costa County, California
City of Pleasant Hill Annex 59
Mitigation
Action
Implement measures to alleviate or reduce flooding impacts in Pleasant Hill. The City of Pleasant Hill would like to include additional storage pipe and/or vaults beneath the street or sidewalk on Patterson Boulevard, Cleaveland Road, Astrid Drive to contain excess storm water and metered outflow to reduce flooding impacts to the existing properties and streets.

Action Number PH-28
Year Initiated /
Anticipated Year
of Initiation
2024 Prioritization Score 37/40
Goal(s) / Objective(s) Addressed Goals: 1, 2, 3, 4, 5 Hazard(s) Mitigated Climate Change, Flood, Sea Level Rise, Severe Weather
Project Status New If Deleted/No Longer
Needed, provide reason. N/A
Benefits
(Loss Avoided) High
Lead Agency / Organization Contra Costa County Public Works Department
Supporting Agency
/ Organization
(If applicable)
Contra Costa County Flood Control District
Additional Participating
Jurisdictions (If applicable)
N/A
Project Duration Long Term Estimated Cost High
Potential Funding Source HMGP, BRIC, FMA, FEMA PA
If Other, you must
identify a funding source. N/A
Please provide further
detail on Potential
Funding Source.

N/A
Implementation Priority High Integration Ideas
(Optional)
2024 Hazard Mitigation Plan
Contra Costa County, California
City of Pleasant Hill Annex 60
Mitigation
Action Implement flood reduction measures to increase the capacity of Grayson Creek.

Action Number PH-29
Year Initiated /
Anticipated Year
of Initiation
2024 Prioritization Score 34/40
Goal(s) / Objective(s) Addressed Goals: 1, 2, 3, 4, 5 Hazard(s) Mitigated Climate Change, Flood, Sea Level Rise, Severe Weather
Project Status New If Deleted/No Longer
Needed, provide reason. N/A
Benefits
(Loss Avoided) Medium
Lead Agency / Organization Contra Costa County Public Works Department
Supporting Agency
/ Organization
(If applicable)
Contra Costa County Flood Control District
Additional Participating
Jurisdictions (If applicable)
N/A
Project Duration Long Term Estimated Cost High
Potential Funding Source HMGP, BRIC, FMA
If Other, you must
identify a funding source. N/A
Please provide further
detail on Potential
Funding Source.

N/A
Implementation Priority High Integration Ideas
(Optional)
2024 Hazard Mitigation Plan
Contra Costa County, California
City of Pleasant Hill Annex 61
APPENDIX A. HAZARD MAPS
The following hazards were mapped for the City of Pleasant Hill – earthquakes, floods, landslides, and wildfires.
• Figure 1 illustrates the liquefaction susceptibility, which helps assess potential damage from earthquakes in the City.
• Figure 2 illustrates the City of Pleasant Hill Special Flood Hazard Area (SFHZ), including each Flood Zone, and the 500-year floodplain. Flood Insurance Rate Maps (FIRMs) show the flood zones, floodplain boundaries, and Base Floor Elevation (BFE) and are used for floodplain management, flood insurance ratings, and to determine flood insurance requirements. FIRMs show areas with a 1% chance of flooding each year, commonly known as the 100-year floodplains, and are illustrated as the SFHA.9 The 500-year floodplains show areas with a 0.2% chance of flooding each year.
• Figure 3 illustrates landslide susceptibility in the City. Landslide susceptibility maps describe the relative likelihood of future land sliding based solely on the intrinsic properties of a location or site.

There are three (3) site factors that most determine susceptibility – prior failure, rock or soil strength, and steepness of slope.10
• Figure 4 illustrates the California Fire Hazard Severity Zones (FHSZ) in the State Responsibility Area (SRA) within the City.
9 Federal Emergency Management Agency. (2017). Flood Insurance Study: Contra Costa County, California and Incorporated Areas. Retrieved from https://www.contracosta.ca.gov/DocumentCenter/View/77626/Volumes-IV?bidId=. 10 California Department of Conservation. (n.d.). Landslides. Retrieved from https://www.conservation.ca.gov/cgs/landslides.
2024 Hazard Mitigation Plan
Contra Costa County, California
City of Pleasant Hill Annex 62
Figure 1. Liquefaction Susceptibility (Earthquake)
2024 Hazard Mitigation Plan
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City of Pleasant Hill Annex 63
Figure 2. Special Flood Hazard Area
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Contra Costa County, California
City of Pleasant Hill Annex 64
Figure 3. Landslide Susceptibility
2024 Hazard Mitigation Plan
Contra Costa County, California
City of Pleasant Hill Annex 65
Figure 4. Fire Hazard Severity Zones
2024 Hazard Mitigation Plan
Contra Costa County, California
City of Pleasant Hill Annex 66
APPENDIX B. STAKEHOLDER AND PUBLIC ENGAGEMENT
The mitigation planning process promotes awareness of hazard risks and continues the conversation about the community’s safety and resilience. A hazard mitigation plan generates additional community support when it accurately reflects the values and priorities of the community which will lead to successfully implementing the mitigation actions and projects identified in this Plan.

Federal regulations for mitigation plan approval require that stakeholders and the general public are given opportunities to be involved in the plan’s development and update process. Input from community members can strengthen the content and outcomes of the hazard mitigation plan. Furthermore, the Plan must state continued public engagement as the Plan is carried out during its lifetime. A public outreach strategy outlines what the community intends to achieve throughout the outreach efforts. Additionally, it identifies who to involve in the process, and how and when to effectively engage the community. Contra Costa County and the City of Pleasant Hill worked together to ensure that the stakeholder and public engagement was meaningful and productive. Refer to Volume 1 (Planning Area-wide Elements) for further information on how stakeholders and the general public were given opportunities to be involved throughout the planning process. However, every plan participant employed a slightly tailored engagement strategy that suits the community’s demographics, including the underserved population, and needs in addition to the lead jurisdiction’s engagement strategy.

City of Pleasant Hill stakeholders and the public were given a number of opportunities to be involved throughout the planning process. Opportunities were provided via a public survey, in person and virtual public meetings, and public engagement activities to review the Plan draft (i.e., public comment period).

The public meetings allowed the County to introduce the Plan update, identify additional hazards of concern that should be included, if any, and to provide input for the various mitigation measures intended to eliminate or reduce the negative impact to those hazards. Language translation assistance in Spanish was available in all public meetings. The public survey asked community representatives and members of the public to rate each of the hazards in terms of perceived risk. Furthermore, they were asked to rate “mitigation importance” for each of the identified hazards in the Plan. The information gathered from this survey was used to inform the hazard risk prioritization process, and to ensure the Plan adequately addressed the public’s concerns and priorities. The survey was available in English, Spanish, Tagalog, Traditional Chinese, and Simplified Chinese. A total of 42 respondents that lived in the City and 47 that worked in the City participated in the survey. Please refer to Volume 1 (Planning Area-wide Elements) for further information and supporting documentation of the public meetings and public survey.

How Public Input was Incorporated into the Plan
Information and feedback gained through the public survey, public meetings, and public comment period provided valuable data to validate and confirm the risk assessment findings and potential mitigation strategies. Specifically, feedback from the public offered during the public meetings offered greater insights into the public’s concerns regarding specific hazards and their impacts. The public also offered specific initiatives they felt would create greater resiliency for the City and its residents.

Survey results helped validate the hazards included in the Plan, the hazard ranking process, and areas where the County and jurisdictions could further improve outreach and education efforts. Open-ended responses, specifically regarding their experience with damages from past hazards, helped to validate hazard-specific impact data in Chapter 4 (Hazard Identification and Risk Assessment) of Volume 1 (Planning Area-wide Elements). These, and related findings, helped the County and City Core Planning Teams determine meaningful mitigation projects.
2024 Hazard Mitigation Plan
Contra Costa County, California
City of Pleasant Hill Annex 67
After the public comment period ended, four (4) public feedback forms were received for the City of Pleasant Hill Annex. The Local Planning Team reviewed the comments and will implement mitigation and preparedness efforts moving forward, if deemed appropriate. However, in order to keep the Plan current after it is approved, the City will ensure that the public continues to be involved in the Plan and how it is carried out. Refer to Section B.2 of this Annex for further details on continued public engagement.

B.1. Public Comment Period
Once the draft Plan was completed, the public was given an opportunity to review and provide comments on the County Hazard Mitigation Plan, including the City of Pleasant Hill’s Annex, prior to submitting the Plan to the State and FEMA. The countywide public comment period began on April 22, 2024, and went on through May 31, 2024. Prior to the public comment period, the Contra Costa County Core Planning Team conducted a strategy meeting with all plan participants (i.e., City of Pleasant Hill) that served as a brainstorming session and helped determine the public outreach goals and proper outreach methods for the public comment period. Subsequently, the City of Pleasant Hill Core Planning Team developed a public outreach strategy that meets the City’s unique needs of the community to engage stakeholders and the public during the public comment period. The City ensured equitable outreach by targeting Contra Costa County’s vulnerable communities, including the younger (under 18 years old) and elderly (over 65 years old) population, individuals with limited English proficiency, and those with access and functional needs.

The City of Pleasant Hill Local Planning Team coordinated with its stakeholders to ensure that the public had an opportunity to learn about the Plan, mitigation actions planned for their community, and ways to get involved in the planning process. Outreach to the Pleasant Hill community involved a combination of in person, printed, and digital media starting on May 17, 2024, through the end of the public comment period on May 31, 2024. To ensure equitable outreach a calendar was created to strategize and map all events.

Public Comment Outreach Calendar
May 2024
Date
Friday, May 17th
Saturday, May 18th
Sunday, May 19th
Sunday, May 26th
Event Name Pleasant Hill Chamber of Commerce’s
Art, Wine, and Music Festival Concerts by the Lake
Location Downtown Pleasant Hill
City Hall
100 Gregory Road
Pleasant Hill, CA 94523
Outreach Method Community Event Community Event
Outreach Purpose Inform, Involve Inform, Involve
Targeted Population Citywide, Age (Elderly and Younger), Access and Functional Needs Citywide, Age (Elderly and Younger) Accommodations Provided Weekend Event Weekend Event
2024 Hazard Mitigation Plan
Contra Costa County, California
City of Pleasant Hill Annex 68
May 17-19, 2024 – Pleasant Hill Chamber of Commerce’s Art, Wine, and Music Festival The Art, Wine, and Music Festival was a weekend community event open to the public. The City hosted a booth sharing information on the Contra Costa County Hazard Mitigation Plan, including Pleasant Hill’s Annex, opportunities to review and provide feedback on the Plan, and the community’s local hazards.

May 26, 2024 – Concerts by the Lake
The Concerts by the Lake was a community event open to the public every Sunday during the Summer months. The City hosted a booth sharing information on the Contra Costa County Hazard Mitigation Plan, including Pleasant Hill’s Annex, opportunities to review and provide feedback on the Plan, and the community’s local hazards.
2024 Hazard Mitigation Plan
Contra Costa County, California
City of Pleasant Hill Annex 69
Printed Materials
A full-page flyer (Figure B-1), created specifically for the public comment period, included information on the planning process, ways to get involved, and ways to prepare. The flyer was distributed at all outreach events.

Figure B-1. Local Hazard Flyer
E-Newsletter
The City Manager issues The Bi-Weekly Update every other Friday with the goal of providing timely information about City projects, services, and events. The Update is sent to community members who subscribe. The May 24, 2024 issue included information on the Contra Costa County Hazard Mitigation Plan and City Annex, and advocated for residents to review the Plan and provide feedback. The announcement included a QR Code that guided the reader to view the Plan and the feedback form. 2024 Hazard Mitigation Plan
Contra Costa County, California
City of Pleasant Hill Annex 70
Social Media Posts
Public comment period announcements were disseminated through the City’s Facebook and Instagram on May 18, 2024. Membership between the two (2) social media pages is approximately 7,000 consisting of residents and local business owners.
2024 Hazard Mitigation Plan
Contra Costa County, California
City of Pleasant Hill Annex 71
Stakeholder Engagement
Due to the size of the Plan (the Base Plan and 40 annexes), some stakeholders would receive the same invitation a significant amount of times. For a more productive outreach and to avoid overwhelming stakeholders, Contra Costa County sent a single invitation to all the countywide stakeholders via e-mail.

However, each plan participant was required to cross-reference the countywide list and identify the stakeholders that applied specifically to their jurisdiction. Not only did this help ensure that a comprehensive list was compiled as part of the stakeholder engagement, but it assisted each plan participant identify any additional stakeholders that may have not been on the list. Table 25 outlines the stakeholders the City of Pleasant Hill identified and provided an opportunity to review and provide feedback on the draft Plan and Annex, via the countywide stakeholders e-mail.

Table 25. City of Pleasant Hill Specific Stakeholders List Local and Regional Agencies
Bay Area Air Quality Management District Contra Costa County Human Resources Department Cal OES Contra Costa County Library
CalFire Contra Costa County Mosquito and Vector Control District
California Department of Parks and Recreation Contra Costa County Office of Communication and Media
California Department of Social Services Contra Costa County Office of Education California Department of Transportation (Caltrans) Contra Costa County Office of Restorative Equity and Social Justice
California Department of Water Resources Contra Costa County Office of the Sheriff California Highway Patrol Contra Costa County Probation California State Lands Commission Contra Costa County Risk Management Contra Costa County Administrator’s Office Contra Costa County Transportation Authority Contra Costa County Airport Contra Costa County Treasurer-Tax Collector Contra Costa County Animal Services Department Contra Costa County Veteran Services Office Contra Costa County Auditor – Controller Contra Costa County Volunteer Organizations Aiding in Disaster
Contra Costa County Clerk-Recorder Contra Costa Water District Contra Costa County Counsel Contra Costa Regional Medical Center Contra Costa County Department of Agriculture East Bay Municipal Utility District Contra Costa County Department of Conservation and
Development East Bay Regional Park District
Contra Costa County Department of Information
Technology
Golden Gate, Bridge, Highway and Transportation
District
Contra Costa County Department of Public Works Metropolitan Transportation Commission Contra Costa County District Attorney’s Office National Weather Service Contra Costa County Employment & Human Services
Department State Water Resources Control Board
Contra Costa County Health Services
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City of Pleasant Hill Annex 72
Agencies that have the Authority to Regulate Development Contra Costa County Department of Conservation
Development Contra Costa Local Agency Formation Commission Neighboring Communities
City of Antioch City of Pittsburg
City of Concord Moraga-Orinda Fire District
Nonprofit Organizations
American Red Cross Futures Explored
California Autism Foundation Independent Living Resources – Solano and Contra Costa Counties
California Resiliency Alliance Inter-Tribal Council of California Care Parent Network La Familia Counseling
CARESTAR Foundation Loaves and Fishes – Contra Costa County Carlton Senior Living Meals on Wheels
CocoKids Monument Crisis Center
Community Awareness and Emergency Response Regional Center of the East Bay Concord Corps. – The Salvation Army Richmond Community Foundation Contra Costa County Crisis Center - 211 Society of St. Vincent de Paul of Contra Costa County Contra Costa County Crisis Center – Hope Solutions United Way Bay Area Interfaith Council of Contra Costa County VistAbility
Down Syndrome Connection of the Bay Area
Businesses, Academia, and Other Private Organizations
AC Transit Food Bank of Contra Costa and Solano
Amtrak Global Medical Response
AtHoc/Blackberry John Muir Behavioral Health
Bloomfield Cherries Kaiser Permanente Hospital
BMK Engineers Lone Tree Post Acute Skilled Nursing Facility BNSF Railway Marathon Petroleum
Brenden Theater Martinez Refinery Company/PBF Energy
Byron School District Milestone California-Based Investment Company California State University MV Transportation
Canyon Elementary School ** Pacific Gas & Electric
Chevron Refinery Philips 66 Rodeo Refinery
Contra Costa County Community College District Shell Oil Company Contra Costa Event Park – Contra Costa County Fair Sutter Delta Medical Center 2024 Hazard Mitigation Plan
Contra Costa County, California
City of Pleasant Hill Annex 73
Businesses, Academia, and Other Private Organizations
Corteva Tenet Health
County Connection Transportation and Link
Paratransit Services University of San Francisco
Delta View Post Acute Care Skilled Nursing Facility Valero Energy Corporation EcoServices Vituity
Refer to Volume 1 (Planning Area-wide Elements) for a full list of the countywide stakeholders. 2024 Hazard Mitigation Plan
Contra Costa County, California
City of Pleasant Hill Annex 74
B.2. Continued Public Engagement
To ensure continued public engagement, Contra Costa County and the City of Pleasant Hill will ensure the Plan is available in the County’s Hazard Mitigation Plan webpage after it has been approved to allow the public an opportunity to provide continual feedback and input. As future needs and concerns arise, or if the public would like to provide feedback regarding the latest version of the Plan and the City’s Annex, the public is invited to use the comment form, which is provided on the website, to provide comments.

County Hazard Mitigation Webpage: contracosta.ca.gov/6415/Local-Hazard-Mitigation-Plan Comment Form: survey.alchemer.com/s3/7792090/CommentFormContraCostaCountyHMP The City of Pleasant Hill will continue to work with Contra Costa County and stakeholders to ensure that the public has an opportunity to learn about the Plan, mitigation actions planned for their communities, and ways to get involved. Hazard mitigation will be a part of the City’s community outreach strategy to include, but not limited to, public meetings, community events, social media, and public surveys throughout the year. Furthermore, the City of Pleasant Hill will continue to ensure equitable outreach by working with other departments, non-profits, and agencies that work with underserved communities throughout the County.
2024 Hazard Mitigation Plan
Contra Costa County, California
City of Pleasant Hill Annex 75
APPENDIX C. HAZARD RISK ASSESSMENT METHODOLOGY
As part of the Contra Costa County Office of Emergency Services (OES), the risk assessment identifies the natural, human-caused, and technological hazards that have potential impacts on all or portions of the County. Hazard identification, historical occurrences, and risk modeling (where applicable and available for specific hazards) information was collected from multiple sources including, but not limited to:
• Environmental Systems Research Institute (Esri)
• Federal Emergency Management Agency (FEMA)
• National Centers for Environmental Information (NCEI) • National Weather Services (NWS)
• United States Geological Survey (USGS)
• Local repositories
This information was analyzed to assess the risk and vulnerability of people, property, the environment, and the jurisdiction’s essential operations from these hazards. Furthermore, a risk ranking was performed for the hazards of concern described in this Plan. The risk ranking is an important step in developing an action plan, as it allows jurisdictions to compare the risk factors from one hazard to another. That comparison provides critical information to use in selecting hazard mitigation actions and their priorities.

This process is not only intended to help focus actions on the hazards with the highest ranking, but also to ensure that jurisdictions are aware of the hazards that ranked low yet still pose significant risk.

In order to provide an informed and comprehensive ranking of the hazards addressed in this Plan, a number of factors were considered: probability, extent, vulnerability, and impact. The sum of all the weighted factors for the extent, vulnerability, and impact categories was combined into a final consequence score. Probability multiplied by consequence resulted in a total risk score for each hazard.

These results were determined by following a data driven quantitative assessment, reviewing, and ranking local knowledge from local subject matter experts, and developing other risk elements by the Core Planning Team based on the data collected. These elements were then aggregated to inform the analysis.

At the fundamental level, consequence is an assessment of the potential impact(s) if the hazard incident actually occurs. In this assessment, the consequence of an event (or the impact) will be interdependent on the following factors:
• Vulnerabilities (i.e., social, physical, and community conditions) • Capabilities and capacities
• Mitigation
Extent + Vulnerability + Impact = Consequence
Consequence x Probability = Total Risk Score
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City of Pleasant Hill Annex 76
• Characteristics of the hazard event (i.e., magnitude, scale) The frequency/probability of the hazard is not included in assessing the consequence because without the event, there is no consequence or impact.

C.1. Probability of Occurrence
The probability of occurrence of a hazard is indicated by a probability factor based on the likelihood of annual occurrence. Numerical probability factors were assigned as follows.

Table 26 outlines the probability of occurrence factors used in the risk assessment calculations for this Plan. A significant hazard event is defined as any hazard occurrence that directly or indirectly damages structures or infrastructure, impedes normal business operations, and/or is likely to cause serious or fatal injuries.

Table 26. Probability of Occurrence
Probability Description Probability
Factor
High Significant hazard event is likely to occur annually. 3 Medium Significant hazard event is likely to occur within 25 years. 2 Low Significant hazard event is likely to occur within 100 years. 1 Unlikely There is little to no probability of significant occurrence, or the recurrence interval is greater than every 100 years. 0
The assessment of hazard frequency is generally based on past hazard events in the area and professional judgment of local subject matter experts.

C.2. Extent Factors
Extent was assessed in two (2) categories – extent/intensity potential and catastrophic probability of the hazard. Numerical extent factors were assigned as follows.

C.2.1. Extent/Intensity Factor
Extent is defined as the range of anticipated intensities of the identified hazards. This category is most commonly expressed using various scientific scales (e.g., Saffir-Simpson, Enhanced Fujita, Modified Mercalli). Extent/Intensity Factors are hazard-specific and are detailed in each hazard profile. Table 27 outlines the extent/intensity factors used in the risk assessment calculations for this Plan.

Table 27. Extent/Intensity Factor
Probability Description Extent
Factor
High Historical and/or probabilistic models/studies for this hazard indicate the possibility of a high-intensity incident. 3
Medium Historical and/or probabilistic models/studies for this hazard indicate the possibility of a medium-intensity incident. 2
Low Historical and/or probabilistic models/studies for this hazard indicate the possibility of a low-intensity incident. 1
Unlikely Historical and/or probabilistic models/studies for this hazard indicate the possibility of little to no intensity. 0
2024 Hazard Mitigation Plan
Contra Costa County, California
City of Pleasant Hill Annex 77
C.2.2. Catastrophic Factor
The probability that a hazard could be catastrophic. Catastrophes are defined as significant incidents that cause sudden and great harm or destruction. Table 28 outlines the catastrophic factors used in the risk assessment calculations for this Plan.

Table 28. Catastrophic Factor
Probability Description Extent
Factor
High Catastrophic hazard event is likely to occur at least once in 10 years. 3 Medium Catastrophic hazard event is likely to occur at least once between 11 and 50 years. 2
Low Catastrophic hazard event is likely to occur at least once in 51 or more years.
1 No Impact Virtually no probability that this hazard could be catastrophic. 0 Each category was assigned a weighting factor to reflect its significance, consistent with this typically used for measuring the benefits of hazard mitigation actions – a weighting factor of three (3) was assigned for Extent/Intensity and its potential for Catastrophe.

C.3. Vulnerability Factors
Vulnerabilities were assessed in three (3) categories – population exposure, property exposure, and exposure based on changes in development. Numerical vulnerability factors were assigned as follows.

C.3.1. Population Exposure Factor
Population exposure values were assigned based on the percentage of the total population exposed to the hazard event. Table 29 outlines the population exposure factors used in the risk assessment calculations for this Plan.

Table 29. Population Exposure Factor
Probability Description Vulnerability
Factor
High 30% or more of the population is exposed to the hazard. 3 Medium 15% to 29% of the population is exposed to the hazard. 2 Low 14% or less of the population is exposed to the hazard. 1 No Vulnerability None of the population is exposed to the hazard. 0 C.3.2. Property Exposure Factor
Property exposure values were assigned based on the percentage of the total property value exposed to the hazard event. Table 30 outlines the property exposure factors used in the risk assessment calculations for this Plan.
2024 Hazard Mitigation Plan
Contra Costa County, California
City of Pleasant Hill Annex 78
Table 30. Property Exposure Factor
Probability Description Vulnerability
Factor
High 25% or more of the total assessed property value is exposed to the hazard. 3
Medium 10% to 24% of the total assessed property value is exposed to a hazard. 2
Low 9% or less of the total assessed property value is exposed to a hazard. 1
No Vulnerability None of the total assessed property value is exposed to a hazard. 0 C.3.3. Changes in Development
Changes in development in the past five (5) years have increased or decreased the community’s vulnerability/exposure to the hazard. Table 31 outlines the changes in development factors used in the risk assessment calculations for this Plan.

Table 31. Changes in Development Factor
Probability Description Vulnerability
Factor
High Changes in development have increased the vulnerability/exposure of the community to the hazard by 10% or more. 3
Medium Changes in development have increased the vulnerability/exposure of the community to the hazard between 5% and 9%. 2
Low Changes in development have increased the vulnerability/exposure of the community to the hazard by 4% or less. 1
No Vulnerability Changes in development had no effect and/or have decreased the vulnerability/exposure of the community to the hazard. 0 Each category was assigned a weighting factor to reflect the significance, consistent with those typically used for measuring the benefits of hazard mitigation actions – a weighting factor of three (3) was assigned for Population Exposure, and a weighting factor of one (1) was assigned for Property Exposed and Changes in Development.

C.4. Impact Factors
Hazard impacts were assessed in eight (8) categories – population and life/safety, underserved/equity, property damages, economic, environmental, essential operations, future development, and climate change. Numerical impact factors were assigned as follows.

C.4.1. Population and Life Safety Factor
Population and life safety values were assigned based on the best available data (historical and probabilistic) for people vulnerable to the hazard event and whether the affected population is likely to experience adverse impacts from the hazard incident. Table 32 outlines the population and life safety factors used in the risk assessment calculations for this Plan. 2024 Hazard Mitigation Plan
Contra Costa County, California
City of Pleasant Hill Annex 79
Table 32. Population and Life Safety Factor
Probability Description Impact
Factor
High Populations exposed to this hazard are likely to experience significant adverse impacts, such as fatalities and severe injuries. 3 Medium Populations exposed to this hazard are likely to experience some adverse impacts, such as injuries requiring acute medical care. 2 Low Populations exposed to this hazard are likely to experience minimal adverse impacts, such as ambulatory injuries. 1
No Impact Populations exposed to this hazard are not likely to experience significant adverse impacts. 0
C.4.2. Underserved/Equity Factor
Underserved/equity values were assigned based on the best available data for underserved populations vulnerable to the hazard event and whether the affected population is likely to experience adverse/disproportionate impacts from the hazard incident resulting in greater disparity in equity. Table 33 outlines the underserved/equity factors used in the risk assessment calculations for this Plan.

Table 33. Underserved/Equity Factor
Probability Description Impact
Factor
High
Underserved populations exposed to the hazard are likely to experience significant adverse/disproportionate impacts, such as fatalities and severe injuries.
3 Medium
Underserved populations exposed to the hazard are likely to experience some adverse/disproportionate impacts, such as injuries requiring acute medical care.
2 Low
Underserved populations exposed to the hazard are likely to experience minimal adverse/disproportionate impacts, such as ambulatory injuries.
1 No Impact Underserved populations exposed to the hazard are not likely to experience significant adverse/disproportionate impacts. 0 C.4.3. Property Damage Factor
Property damage values were assigned based on the expected total property damage incurred from a hazard incident. It is important to note that values represent estimates of the loss from a major incident based on historical data or probabilistic models/studies. Table 34 outlines the property damage factors used in the risk assessment calculations for this Plan.

Table 34. Property Damage Factor
Probability Description Impact
Factor
High
More than $5 Million in property damages is expected from a single major hazard event, or damages are expected to occur to 15% or more of the property value within the jurisdiction.
3 Medium
More than $500,000 but less than $5 Million in property damages is expected from a single major hazard event, or damages are expected to occur to more than 5% but less than 15% of the property value within the jurisdiction.
2 2024 Hazard Mitigation Plan
Contra Costa County, California
City of Pleasant Hill Annex 80
Probability Description Impact
Factor
Low
Less than $500,000 in property damages is expected from a single major hazard event or less than 5% of the property value within the jurisdiction.
1 No Impact Little to no property damage is expected from a single major hazard event. 0
C.4.4. Economic Factor
An estimation of the impact, expressed in terms of dollars, on the local economy is based on a loss of business revenue, crops, worker wages, and local tax revenues or on the impact on the local gross domestic product (GDP). Table 35 outlines the economic factors used in the risk assessment calculations for this Plan.

Table 35. Economic Factor
Probability Description Impact
Factor
High Where the total economic impact is likely to be greater than $10 Million. 3
Medium Total economic impact is likely to be greater than $500,000, but less than or equal to $10 Million. 2
Low Total economic impact is not likely to be greater than $100,000. 1 No Impact Virtually no significant economic impact. 0
C.4.5. Environmental Factor
An estimate of the environmental impact from a major hazard event requiring outside resources and support; and/or repair, clean-up, restoration, and/or preservation work. Table 36 outlines the environmental factors used in the risk assessment calculations for this Plan.

Table 36. Environmental Factor
Probability Description Impact
Factor
High
Environmental impact from a single major hazard event is likely to be significant, requiring extensive outside resources and support; and/or repair, clean-up, restoration, and/or preservation work. 3 Medium
Environmental impact from a single major hazard event is likely to be localized, requiring some outside resources and support; and/or repair, clean-up, restoration, or preservation work.
2 Low
Environmental impact from a single major hazard event is likely to be minimal, requiring little to no outside resources and support, and/or minimal repair, clean-up, restoration, or preservation work. 1 No Impact No environmental impacts from a single major hazard event are likely. 0
C.4.6. Essential Operations Factors
The essential operations factor is the impact on the ability of the jurisdiction to meet the essential day-today operational demands and needs of the community after a single major hazard event. Table 37 outlines the essential operations factors used in the risk assessment calculations for this Plan. 2024 Hazard Mitigation Plan
Contra Costa County, California
City of Pleasant Hill Annex 81
Table 37. Essential Operations Factor
Probability Description Impact
Factor
High
Impact greater than 72 hours on the ability of the jurisdiction to meet the essential day-to-day operational demands and needs of the community from a single major hazard event.
3 Medium
Impact between 24 and 72 hours on the ability of the jurisdiction to meet the essential day-to-day operational demands and needs of the community from a single major hazard event.
2 Low
Impact less than 24 hours on the ability of the jurisdiction to meet the essential day-to-day operational demands and needs of the community from a single major hazard event.
1 No Impact
No impact on the ability of the jurisdiction to meet the essential dayto-day operational demands and needs of the community from a single major hazard event.
0 C.4.7. Future Development Factor
The future development factor is the potential that future development will have on increasing or decreasing the impact/consequence of the hazard. Table 38 outlines the future development factors used in the risk assessment calculations for this Plan.

Table 38. Future Development Factor
Probability Description Impact
Factor
High Future development trends will significantly increase the impact/consequence of this hazard. 3
Medium Future development trends will increase the impact/consequence of this hazard, but not significantly. 2
Low Future development trends will minimally increase
impact/consequence of this hazard. 1
No Impact
Future development trends will not increase the impact/consequence of the hazard, and/or may even decrease the impact/consequence of this hazard.
0 C.4.8. Climate Change Factor
The potential that climate change will increase the risk of the hazard (i.e., type, location, and range of anticipated intensities of the hazard and impacts). Table 39 outlines the climate change factors used in the risk assessment calculations for this Plan.

Table 39. Climate Change Factor
Probability Description Impact
Factor
High Climate Change trends will significantly increase the risk of this hazard and its impacts. 3
Medium Climate Change trends will increase the risk of this hazard and its impacts, but not significantly. 2
Low Climate Change trends will minimally increase the risk of this hazard and its impacts. 1
No Impact Climate change trends will not increase the risk of the hazard and its impacts. 0
2024 Hazard Mitigation Plan
Contra Costa County, California
City of Pleasant Hill Annex 82
Each category was assigned a weighting factor to reflect its significance, consistent with those typically used for measuring the benefits of hazard mitigation actions – a weighting factor of three (3) was assigned for Population and Life Safety, and Underserved/Equity, and a weighting factor of two (2) was assigned for Property Damage. A weighting factor of one (1) was assigned for Economic, Environmental, Essential Operations, Future Development, and Climate Change.
2024 Hazard Mitigation Plan
Contra Costa County, California
City of Pleasant Hill Annex 83
APPENDIX D. HAZARD RISK RANKING DETAILS
D.1. Probability of Occurrence
Hazard Event Probability of Occurrence Probability
Factor
Weighted
Factor
Climate Change Medium Significant hazard event is likely to occur within 25 years. 2 N/A Dam and Levee Failure Low Significant hazard event is likely to occur within 100 years. 1 N/A Drought Medium Significant hazard event is likely to occur within 25 years. 2 N/A Earthquake Medium Significant hazard event is likely to occur within 25 years. 2 N/A Flood
(Riverine/Creek) Medium Significant hazard event is likely to occur within 25 years. 2 N/A Flood
(Urban/Flash Flood) Medium Significant hazard event is likely to occur within 25 years. 2 N/A Heat Wave/Extreme Heat
(Severe Weather) High Significant hazard event is likely to occur annually. 3 N/A Heavy Rainfall
(Severe Weather) High Significant hazard event is likely to occur annually. 3 N/A Landslide Medium Significant hazard event is likely to occur within 25 years. 2 N/A Sea Level Rise Low Significant hazard event is likely to occur within 100 years. 1 N/A Severe Thunderstorm
(Severe Weather) High Significant hazard event is likely to occur annually. 3 N/A Strong Winds/ Damaging Winds
(Severe Weather) High Significant hazard event is likely to occur annually. 3 N/A Tornado
(Severe Weather) Low Significant hazard event is likely to occur within 100 years. 1 N/A Tsunami Unlikely There is little to no probability of significant occurrence, or the recurrence interval is greater than every 100 years.
0 N/A
Wildfire Medium Significant hazard event is likely to occur within 25 years. 2 N/A Active Shooter Incidents Medium Significant hazard event is likely to occur within 25 years. 2 N/A Cybersecurity Threats Medium Significant hazard event is likely to occur within 25 years. 2 N/A Hazardous Materials Incidents Medium Significant hazard event is likely to occur within 25 years. 2 N/A 2024 Hazard Mitigation Plan
Contra Costa County, California
City of Pleasant Hill Annex 84
Hazard Event Probability of Occurrence Probability
Factor
Weighted
Factor
Terrorism
(Weapons of Mass Destruction) Low Significant hazard event is likely to occur within 100 years. 1 N/A Utility Interruptions High Significant hazard event is likely to occur annually. 3 N/A D.2. Extent Factors
Hazard Event Extent Factor Extent Extent
Factor
Weighted
Factor
Climate Change
Extent/Intensity Medium
Historical and/or probabilistic models/studies for this hazard indicate the possibility of a medium-intensity
incident.
2 6
Catastrophic Low Catastrophic hazard event is likely to occur at least once in 51 or more years. 1 3
Dam and Levee Failure
Extent/Intensity High
Historical and/or probabilistic models/studies for this hazard indicate the possibility of a high-intensity
incident.
3 9
Catastrophic Medium Catastrophic hazard event is likely to occur at least once between 11 and 50 years. 2 6
Drought
Extent/Intensity High
Historical and/or probabilistic models/studies for this hazard indicate the possibility of a high-intensity
incident.
3 9
Catastrophic High Catastrophic hazard event is likely to occur at least once in 10 years. 3 9
Earthquake
Extent/Intensity High
Historical and/or probabilistic models/studies for this hazard indicate the possibility of a high-intensity
incident.
3 9
Catastrophic High Catastrophic hazard event is likely to occur at least once in 10 years. 3 9
Flood
(Riverine/Creek)
Extent/Intensity Medium
Historical and/or probabilistic models/studies for this hazard indicate the possibility of a medium-intensity
incident.
2 6
Catastrophic Low Catastrophic hazard event is likely to occur at least once in 51 or more years.
1 3
Flood
(Urban/Flash Flood)
Extent/Intensity High
Historical and/or probabilistic models/studies for this hazard indicate the possibility of a high-intensity
incident.
3 9
Catastrophic Medium Catastrophic hazard event is likely to occur at least once between 11 and 50 years. 2 6
2024 Hazard Mitigation Plan
Contra Costa County, California
City of Pleasant Hill Annex 85
Hazard Event Extent Factor Extent Extent
Factor
Weighted
Factor
Heat Wave/Extreme Heat
(Severe Weather)
Extent/Intensity Medium
Historical and/or probabilistic models/studies for this hazard indicate the possibility of a medium-intensity
incident.
2 6
Catastrophic Low Catastrophic hazard event is likely to occur at least once in 51 or more years. 1 3
Heavy Rainfall
(Severe Weather)
Extent/Intensity Medium
Historical and/or probabilistic models/studies for this hazard indicate the possibility of a medium-intensity
incident.
2 6
Catastrophic Low Catastrophic hazard event is likely to occur at least once in 51 or more years. 1 3
Landslide
Extent/Intensity Medium
Historical and/or probabilistic models/studies for this hazard indicate the possibility of a medium-intensity
incident.
2 6
Catastrophic Low Catastrophic hazard event is likely to occur at least once in 51 or more years. 1 3
Sea Level Rise
Extent/Intensity Unlikely Historical and/or probabilistic models/studies for this hazard indicate the possibility of little to no intensity. 0 0 Catastrophic Unlikely Virtually no probability that this hazard could be catastrophic. 0 0
Severe Thunderstorm
(Severe Weather)
Extent/Intensity Low
Historical and/or probabilistic models/studies for this hazard indicate the possibility of a low-intensity
incident.
1 3
Catastrophic Low Catastrophic hazard event is likely to occur at least once in 51 or more years. 1 3
Strong Winds/ Damaging Winds
(Severe Weather)
Extent/Intensity Medium
Historical and/or probabilistic models/studies for this hazard indicate the possibility of a medium-intensity
incident.
2 6
Catastrophic Low Catastrophic hazard event is likely to occur at least once in 51 or more years. 1 3
Tornado
(Severe Weather)
Extent/Intensity Low
Historical and/or probabilistic models/studies for this hazard indicate the possibility of a low-intensity
incident.
1 3
Catastrophic Low Catastrophic hazard event is likely to occur at least once in 51 or more years. 1 3
Tsunami
Extent/Intensity Unlikely Historical and/or probabilistic models/studies for this hazard indicate the possibility of little to no intensity. 0 0 Catastrophic Unlikely Virtually no probability that this hazard could be catastrophic. 0 0
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Contra Costa County, California
City of Pleasant Hill Annex 86
Hazard Event Extent Factor Extent Extent
Factor
Weighted
Factor
Wildfire
Extent/Intensity Medium
Historical and/or probabilistic models/studies for this hazard indicate the possibility of a medium-intensity
incident.
2 6
Catastrophic Low Catastrophic hazard event is likely to occur at least once in 51 or more years. 1 3
Active Shooter Incidents
Extent/Intensity Medium
Historical and/or probabilistic models/studies for this hazard indicate the possibility of a medium-intensity
incident.
2 6
Catastrophic Low Catastrophic hazard event is likely to occur at least once in 51 or more years. 1 3
Cybersecurity Threats
Extent/Intensity Medium
Historical and/or probabilistic models/studies for this hazard indicate the possibility of a medium-intensity
incident.
2 6
Catastrophic Medium Catastrophic hazard event is likely to occur at least once between 11 and 50 years. 2 6
Hazardous Materials Incidents
Extent/Intensity High
Historical and/or probabilistic models/studies for this hazard indicate the possibility of a high-intensity
incident.
3 9
Catastrophic Medium Catastrophic hazard event is likely to occur at least once between 11 and 50 years. 2 6
Terrorism
(Weapons of Mass Destruction)
Extent/Intensity High
Historical and/or probabilistic models/studies for this hazard indicate the possibility of a high-intensity
incident.
3 9
Catastrophic High Catastrophic hazard event is likely to occur at least once in 10 years. 3 9
Utility Interruptions
Extent/Intensity Medium
Historical and/or probabilistic models/studies for this hazard indicate the possibility of a medium-intensity
incident.
2 6
Catastrophic Low Catastrophic hazard event is likely to occur at least once in 51 or more years.
1 3
D.3. Vulnerability Factors
Hazard Event Vulnerability Factor Vulnerability Vulnerability Factor
Weighted
Factor
Climate Change
Population Exposure High 30% or more of the population (including underserved population) is exposed to the hazard. 3 9
Property Exposure Low 9% or less of the total assessed property value is exposed to the hazard. 1 2
2024 Hazard Mitigation Plan
Contra Costa County, California
City of Pleasant Hill Annex 87
Hazard Event Vulnerability Factor Vulnerability Vulnerability Factor
Weighted
Factor
Changes in
Development Low
Changes in development have minimally increased
the vulnerability of the community to the hazard by
4% or less.
1 1
Dam and Levee Failure
Population Exposure Low 14% or less of the population (including underserved population) is exposed to the hazard. 1 3
Property Exposure Low 9% or less of the total assessed property value is exposed to the hazard. 1 2
Changes in
Development Low
Changes in development have minimally increased
the vulnerability of the community to the hazard by
4% or less.
1 1
Drought
Population Exposure High 30% or more of the population (including underserved population) is exposed to the hazard. 3 9
Property Exposure Low 9% or less of the total assessed property value is exposed to the hazard. 1 2
Changes in
Development Low
Changes in development have minimally increased
the vulnerability of the community to the hazard by
4% or less.
1 1
Earthquake
Population Exposure High 30% or more of the population (including underserved population) is exposed to the hazard. 3 9
Property Exposure High 25% of the total assessed property is exposed to the hazard. 3 6
Changes in
Development Medium
The changes in development have increased the
vulnerability of the community to the hazard
between 5% and 9%.
2 2
Flood
(Riverine/Creek)
Population Exposure Low 14% or less of the population (including underserved population) is exposed to the hazard. 1 3
Property Exposure Low 9% or less of the total assessed property value is exposed to the hazard. 1 2
Changes in
Development Medium
The changes in development have increased the
vulnerability of the community to the hazard
between 5% and 9%.
2 2
Flood
(Urban/Flash Flood)
Population Exposure Medium 15% to 29% of the population (including underserved population) is exposed to the hazard. 2 6
Property Exposure Medium 10% to 24% of the total assessed property value is exposed to the hazard. 2 4
Changes in
Development Medium
The changes in development have increased the
vulnerability of the community to the hazard
between 5% and 9%.
2 2
Heat Wave/Extreme Heat
(Severe Weather) Population Exposure High 30% or more of the population (including underserved population) is exposed to the hazard. 3 9
2024 Hazard Mitigation Plan
Contra Costa County, California
City of Pleasant Hill Annex 88
Hazard Event Vulnerability Factor Vulnerability Vulnerability Factor
Weighted
Factor
Property Exposure No Vulnerability None of the total assessed property value is exposed to the hazard. 0 0
Changes in
Development Low
Changes in development have minimally increased
the vulnerability of the community to the hazard by
4% or less.
1 1
Heavy Rainfall
(Severe Weather)
Population Exposure High 30% or more of the population (including underserved population) is exposed to the hazard. 3 9
Property Exposure Medium 10 to 14% of the total assessed property is exposed to the hazard. 2 4
Changes in
Development Low
Changes in development have minimally increased
the vulnerability of the community to the hazard by
4% or less.
1 1
Landslide
Population Exposure Low 14% or less of the population (including underserved population) is exposed to the hazard. 1 3
Property Exposure Low 9% or less of the total assessed property value is exposed to the hazard. 1 2
Changes in
Development Low
Changes in development have minimally increased
the vulnerability of the community to the hazard by
4% or less.
1 1
Sea Level Rise
Population Exposure No Vulnerability None of the population is exposed to the hazard. 0 0 Property Exposure No Vulnerability None of the total assessed property value is exposed to a hazard. 0 0
Changes in
Development Low
Changes in development have minimally increased
the vulnerability of the community to the hazard by
4% or less.
1 1
Severe Thunderstorm
(Severe Weather)
Population Exposure High 30% or more of the population (including underserved population) is exposed to the hazard. 3 9
Property Exposure High 25% of the total assessed property is exposed to the hazard. 3 6
Changes in
Development Low
Changes in development have minimally increased
the vulnerability of the community to the hazard by
4% or less.
1 1
Strong Winds/ Damaging Winds
(Severe Weather)
Population Exposure Medium 15% to 29% of the population (including underserved population) is exposed to the hazard. 2 6
Property Exposure Medium 10% to 24% of the total assessed property value is exposed to the hazard. 2 4
Changes in
Development Low
Changes in development have minimally increased
the vulnerability of the community to the hazard by
4% or less.
1 1
2024 Hazard Mitigation Plan
Contra Costa County, California
City of Pleasant Hill Annex 89
Hazard Event Vulnerability Factor Vulnerability Vulnerability Factor
Weighted
Factor
Tornado
(Severe Weather)
Population Exposure Low 15% to 29% of the population (including underserved population) is exposed to the hazard. 1 3
Property Exposure Low 10% to 24% of the total assessed property value is exposed to the hazard. 1 2
Changes in
Development Low
Changes in development have minimally increased
the vulnerability of the community to the hazard by
4% or less.
1 1
Tsunami
Population Exposure No Vulnerability None of the population is exposed to the hazard. 0 0 Property Exposure No Vulnerability None of the total assessed property value is exposed to a hazard. 0 0
Changes in
Development No Vulnerability
Changes in development had no effect and/or have
decreased the vulnerability/exposure of the
community to the hazard.
0 0
Wildfire
Population Exposure Medium 15% to 29% of the population (including underserved population) is exposed to the hazard. 2 6
Property Exposure Medium 10% to 24% of the total assessed property value is exposed to the hazard. 2 4
Changes in
Development Medium
The changes in development have increased the
vulnerability of the community to the hazard
between 5% and 9%.
2 2
Active Shooter Incidents
Population Exposure Low 14% or less of the population (including underserved population) is exposed to the hazard. 1 3
Property Exposure Low 9% or less of the total assessed property value is exposed to the hazard. 1 2
Changes in
Development No Vulnerability
Changes in development had no effect and/or
decreased the vulnerability of the community to the
hazard.
0 0
Cybersecurity Threats
Population Exposure Medium 15% to 29% of the population (including underserved population) is exposed to the hazard. 2 6
Property Exposure No Vulnerability None of the total assessed property value is exposed to the hazard. 0 0
Changes in
Development Low
Changes in development have minimally increased
the vulnerability of the community to the hazard by
4% or less.
1 1
Hazardous Materials Incidents
Population Exposure Medium 15% to 29% of the population (including underserved population) is exposed to the hazard. 2 6
Property Exposure Low 9% or less of the total assessed property value is exposed to the hazard. 1 2
2024 Hazard Mitigation Plan
Contra Costa County, California
City of Pleasant Hill Annex 90
Hazard Event Vulnerability Factor Vulnerability Vulnerability Factor
Weighted
Factor
Changes in
Development Low
Changes in development have minimally increased
the vulnerability of the community to the hazard by
4% or less.
1 1
Terrorism
(Weapons of Mass Destruction)
Population Exposure Medium 15% to 29% of the population (including underserved population) is exposed to the hazard. 2 6
Property Exposure Medium 10% to 24% of the total assessed property value is exposed to the hazard. 2 4
Changes in
Development Low
Changes in development have minimally increased
the vulnerability of the community to the hazard by
4% or less.
1 1
Utility Interruptions
Population Exposure Medium 15% to 29% of the population (including underserved population) is exposed to the hazard. 2 6
Property Exposure No Vulnerability None of the total assessed property value is exposed to the hazard. 0 0
Changes in
Development Low
Changes in development have minimally increased
the vulnerability of the community to the hazard by
4% or less.
1 1
D.4. Impact Factors
Hazard Event Impact Factor Impact Impact
Factor
Weighted
Factor
Climate Change
Population and Life
Safety Low
Populations exposed to this hazard are likely to
experience minimal adverse impacts, such as ambulatory
injuries.
1 3
Underserved/Equity Low
Underserved populations exposed to the hazard are likely to experience minimal adverse/disproportionate impacts, such as ambulatory injuries.
1 3
Property Damage Low
Less than $500,000 in property damages is expected
from a single major hazard event or less than 5% of the property value within the jurisdiction.
1 2
Economic Low Total economic impact is not likely to be greater than $100,000. 1 1
Environmental Low
Environmental impact from a single major hazard event is likely to be minimal, requiring little to no outside resources and support, and/or minimal repair, clean-up, restoration, or preservation work.
1 1
2024 Hazard Mitigation Plan
Contra Costa County, California
City of Pleasant Hill Annex 91
Hazard Event Impact Factor Impact Impact
Factor
Weighted
Factor
Essential Operations Low
Impact less than 24 hours on the ability of the jurisdiction to meet the essential day-to-day operational demands
and needs of the community from a single major hazard
event.
1 1
Future Development Low Future development trends will minimally increase impact/consequence of this hazard. 1 1
Climate Change High Climate Change trends will significantly increase the risk of this hazard and its impacts. 3 3
Dam and Levee Failure
Population and Life
Safety Medium
Populations exposed to this hazard are likely to
experience some adverse impacts, such as injuries
requiring acute medical care.
2 6
Underserved/Equity Medium
Underserved populations exposed to the hazard are likely to experience some adverse/disproportionate impacts,
such as injuries requiring acute medical care.
2 6
Property Damage Medium
More than $500,000 but less than $5 Million in property damages is expected from a single major hazard event, or damages are expected to occur to more than 5% but less
than 15% of the property value within the jurisdiction. 2 4
Economic Medium Total economic impact is likely to be greater than $500,000, but less than or equal to $10 Million. 2 2
Environmental Medium
Environmental impact from a single major hazard event is likely to be localized, requiring some outside resources and support; and/or repair, clean-up, restoration, or
preservation work.
2 2
Essential Operations Medium
Impact between 24 and 72 hours on the ability of the
jurisdiction to meet the essential day-to-day operational demands and needs of the community from a single major
hazard event.
2 2
Future Development Medium Future development trends will increase the impact/consequence of this hazard, but not significantly. 2 2 Climate Change Medium Climate Change trends will increase the risk of this hazard and its impacts, but not significantly. 2 2
Drought
Population and Life
Safety Low
Populations exposed to this hazard are likely to
experience minimal adverse impacts, such as ambulatory
injuries.
1 3
Underserved/Equity Medium
Underserved populations exposed to the hazard are likely to experience some adverse/disproportionate impacts,
such as injuries requiring acute medical care.
2 6
2024 Hazard Mitigation Plan
Contra Costa County, California
City of Pleasant Hill Annex 92
Hazard Event Impact Factor Impact Impact
Factor
Weighted
Factor
Property Damage Low
Less than $500,000 in property damages is expected
from a single major hazard event or less than 5% of the property value within the jurisdiction.
1 2
Economic Medium Total economic impact is likely to be greater than $500,000, but less than or equal to $10 Million. 2 2
Environmental Low
Environmental impact from a single major hazard event is likely to be minimal, requiring little to no outside resources and support, and/or minimal repair, clean-up, restoration, or preservation work.
1 1
Essential Operations Low
Impact less than 24 hours on the ability of the jurisdiction to meet the essential day-to-day operational demands
and needs of the community from a single major hazard
event.
1 1
Future Development Medium Future development trends will increase the impact/consequence of this hazard, but not significantly. 2 2 Climate Change High Climate Change trends will significantly increase the risk of this hazard and its impacts. 3 3
Earthquake
Population and Life
Safety High
Populations exposed to this hazard are likely to
experience significant adverse impacts, such as fatalities and severe injuries.
3 9
Underserved/Equity High
Underserved populations exposed to the hazard are likely to experience significant adverse/disproportionate
impacts, such as fatalities and severe injuries.
3 9
Property Damage High
More than $5 Million in property damages is expected
from a single major hazard event, or damages are
expected to occur to 15% or more of the property value
within the jurisdiction.
3 6
Economic High Where the total economic impact is likely to be greater than $10 Million. 3 3
Environmental High
Environmental impact from a single major hazard event is likely to be significant, requiring extensive outside
resources and support; and/or repair, clean-up,
restoration, and/or preservation work.
3 3
Essential Operations High
Impact greater than 72 hours on the ability of the
jurisdiction to meet the essential day-to-day operational demands and needs of the community from a single major
hazard event.
3 3
Future Development High Future development trends will significantly increase the impact/consequence of this hazard. 3 3
2024 Hazard Mitigation Plan
Contra Costa County, California
City of Pleasant Hill Annex 93
Hazard Event Impact Factor Impact Impact
Factor
Weighted
Factor
Climate Change No Impact Climate change trends will not increase the risk of the hazard and its impacts. 0 0
Flood
(Riverine/Creek)
Population and Life
Safety Medium
Populations exposed to this hazard are likely to
experience some adverse impacts, such as injuries
requiring acute medical care.
2 6
Underserved/Equity Medium
Underserved populations exposed to the hazard are likely to experience some adverse/disproportionate impacts,
such as injuries requiring acute medical care.
2 6
Property Damage Medium
More than $500,000 but less than $5 Million in property damages is expected from a single major hazard event, or damages are expected to occur to more than 5% but less
than 15% of the property value within the jurisdiction. 2 4
Economic Medium Total economic impact is likely to be greater than $500,000, but less than or equal to $10 Million. 2 2
Environmental Medium
Environmental impact from a single major hazard event is likely to be localized, requiring some outside resources and support; and/or repair, clean-up, restoration, or
preservation work.
2 2
Essential Operations Medium
Impact between 24 and 72 hours on the ability of the
jurisdiction to meet the essential day-to-day operational demands and needs of the community from a single major
hazard event.
2 2
Future Development Medium Future development trends will increase the impact/consequence of this hazard, but not significantly. 2 2 Climate Change High Climate Change trends will significantly increase the risk of this hazard and its impacts. 3 3
Flood
(Urban/Flash Flood)
Population and Life
Safety Medium
Populations exposed to this hazard are likely to
experience some adverse impacts, such as injuries
requiring acute medical care.
2 6
Underserved/Equity Medium
Underserved populations exposed to the hazard are likely to experience some adverse/disproportionate impacts,
such as injuries requiring acute medical care.
2 6
Property Damage High
More than $5 Million in property damages is expected
from a single major hazard event, or damages are
expected to occur to 15% or more of the property value
within the jurisdiction.
3 6
Economic Medium Total economic impact is likely to be greater than $500,000, but less than or equal to $10 Million. 2 2
2024 Hazard Mitigation Plan
Contra Costa County, California
City of Pleasant Hill Annex 94
Hazard Event Impact Factor Impact Impact
Factor
Weighted
Factor
Environmental Medium
Environmental impact from a single major hazard event is likely to be localized, requiring some outside resources and support; and/or repair, clean-up, restoration, or
preservation work.
2 2
Essential Operations Medium
Impact between 24 and 72 hours on the ability of the
jurisdiction to meet the essential day-to-day operational demands and needs of the community from a single major
hazard event.
2 2
Future Development Medium Future development trends will increase the impact/consequence of this hazard, but not significantly. 2 2 Climate Change High Climate Change trends will significantly increase the risk of this hazard and its impacts. 3 3
Heat Wave/Extreme Heat
(Severe Weather)
Population and Life
Safety Low
Populations exposed to this hazard are likely to
experience minimal adverse impacts, such as ambulatory
injuries.
1 3
Underserved/Equity Medium
Underserved populations exposed to the hazard are likely to experience some adverse/disproportionate impacts,
such as injuries requiring acute medical care.
2 6
Property Damage No Impact Little to no property damage is expected from a single major hazard event. 0 0
Economic Low Total economic impact is not likely to be greater than $100,000. 1 1
Environmental No Impact No environmental impacts from a single major hazard event are likely. 0 0
Essential Operations Low
Impact less than 24 hours on the ability of the jurisdiction to meet the essential day-to-day operational demands
and needs of the community from a single major hazard
event.
1 1
Future Development Low Future development trends will minimally increase impact/consequence of this hazard. 1 1
Climate Change High Climate Change trends will significantly increase the risk of this hazard and its impacts. 3 3
Heavy Rainfall
(Severe Weather)
Population and Life
Safety Low
Populations exposed to this hazard are likely to
experience minimal adverse impacts, such as ambulatory
injuries.
1 3
Underserved/Equity Low
Underserved populations exposed to the hazard are likely to experience minimal adverse/disproportionate impacts, such as ambulatory injuries.
1 3
2024 Hazard Mitigation Plan
Contra Costa County, California
City of Pleasant Hill Annex 95
Hazard Event Impact Factor Impact Impact
Factor
Weighted
Factor
Property Damage Low
Less than $500,000 in property damages is expected
from a single major hazard event or less than 5% of the property value within the jurisdiction.
1 2
Economic Low Total economic impact is not likely to be greater than $100,000. 1 1
Environmental Low
Environmental impact from a single major hazard event is likely to be minimal, requiring little to no outside resources and support, and/or minimal repair, clean-up, restoration, or preservation work.
1 1
Essential Operations Low
Impact less than 24 hours on the ability of the jurisdiction to meet the essential day-to-day operational demands
and needs of the community from a single major hazard
event.
1 1
Future Development Low Future development trends will minimally increase impact/consequence of this hazard. 1 1
Climate Change High Climate Change trends will significantly increase the risk of this hazard and its impacts. 3 3
Landslide
Population and Life
Safety Low
Populations exposed to this hazard are likely to
experience minimal adverse impacts, such as ambulatory
injuries.
1 3
Underserved/Equity Low
Underserved populations exposed to the hazard are likely to experience minimal adverse/disproportionate impacts, such as ambulatory injuries.
1 3
Property Damage Medium
More than $500,000 but less than $5 Million in property damages is expected from a single major hazard event, or damages are expected to occur to more than 5% but less
than 15% of the property value within the jurisdiction. 2 4
Economic Low Total economic impact is not likely to be greater than $100,000. 1 1
Environmental Low
Environmental impact from a single major hazard event is likely to be minimal, requiring little to no outside resources and support, and/or minimal repair, clean-up, restoration, or preservation work.
1 1
Essential Operations Medium
Impact between 24 and 72 hours on the ability of the
jurisdiction to meet the essential day-to-day operational demands and needs of the community from a single major
hazard event.
2 2
Future Development Low Future development trends will minimally increase impact/consequence of this hazard. 1 1
2024 Hazard Mitigation Plan
Contra Costa County, California
City of Pleasant Hill Annex 96
Hazard Event Impact Factor Impact Impact
Factor
Weighted
Factor
Climate Change Medium Climate Change trends will increase the risk of this hazard and its impacts, but not significantly. 2 2
Sea Level Rise
Population and Life
Safety No Impact Populations exposed to this hazard are not likely to experience significant adverse impacts. 0 0 Underserved/Equity No Impact
Underserved populations exposed to the hazard are not
likely to experience significant adverse/disproportionate impacts.
0 0
Property Damage Low
Less than $500,000 in property damages is expected
from a single major hazard event or less than 5% of the property value within the jurisdiction.
1 2
Economic No Impact Virtually no significant economic impact. 0 0 Environmental No Impact No environmental impacts from a single major hazard event are likely. 0 0
Essential Operations Low
Impact less than 24 hours on the ability of the jurisdiction to meet the essential day-to-day operational demands
and needs of the community from a single major hazard
event.
1 1
Future Development No Impact
Future development trends will not increase the
impact/consequence of the hazard, and/or may even
decrease the impact/consequence of this hazard.
0 0
Climate Change High Climate Change trends will significantly increase the risk of this hazard and its impacts. 3 3
Severe Thunderstorm
(Severe Weather)
Population and Life
Safety Low
Populations exposed to this hazard are likely to
experience minimal adverse impacts, such as ambulatory
injuries.
1 3
Underserved/Equity Low
Underserved populations exposed to the hazard are likely to experience minimal adverse/disproportionate impacts, such as ambulatory injuries.
1 3
Property Damage Low
Less than $500,000 in property damages is expected
from a single major hazard event or less than 5% of the property value within the jurisdiction.
1 2
Economic Low Total economic impact is not likely to be greater than $100,000. 1 1
Environmental Low
Environmental impact from a single major hazard event is likely to be minimal, requiring little to no outside resources and support, and/or minimal repair, clean-up, restoration, or preservation work.
1 1
2024 Hazard Mitigation Plan
Contra Costa County, California
City of Pleasant Hill Annex 97
Hazard Event Impact Factor Impact Impact
Factor
Weighted
Factor
Essential Operations Low
Impact less than 24 hours on the ability of the jurisdiction to meet the essential day-to-day operational demands
and needs of the community from a single major hazard
event.
1 1
Future Development Low Future development trends will minimally increase impact/consequence of this hazard. 1 1
Climate Change Medium Climate Change trends will increase the risk of this hazard and its impacts, but not significantly. 2 2
Strong Winds/ Damaging Winds
(Severe Weather)
Population and Life
Safety Low
Populations exposed to this hazard are likely to
experience minimal adverse impacts, such as ambulatory
injuries.
1 3
Underserved/Equity Low
Underserved populations exposed to the hazard are likely to experience minimal adverse/disproportionate impacts, such as ambulatory injuries.
1 3
Property Damage Medium
More than $500,000 but less than $5 Million in property damages is expected from a single major hazard event, or damages are expected to occur to more than 5% but less
than 15% of the property value within the jurisdiction. 2 4
Economic Low Total economic impact is not likely to be greater than $100,000. 1 1
Environmental Low
Environmental impact from a single major hazard event is likely to be minimal, requiring little to no outside resources and support, and/or minimal repair, clean-up, restoration, or preservation work.
1 1
Essential Operations Low
Impact less than 24 hours on the ability of the jurisdiction to meet the essential day-to-day operational demands
and needs of the community from a single major hazard
event.
1 1
Future Development Low Future development trends will minimally increase impact/consequence of this hazard. 1 1
Climate Change Medium Climate Change trends will increase the risk of this hazard and its impacts, but not significantly. 2 2
Tornado
(Severe Weather)
Population and Life
Safety Low
Populations exposed to this hazard are likely to
experience minimal adverse impacts, such as ambulatory
injuries.
1 3
Underserved/Equity Low
Underserved populations exposed to the hazard are likely to experience minimal adverse/disproportionate impacts, such as ambulatory injuries.
1 3
2024 Hazard Mitigation Plan
Contra Costa County, California
City of Pleasant Hill Annex 98
Hazard Event Impact Factor Impact Impact
Factor
Weighted
Factor
Property Damage Low
Less than $500,000 in property damages is expected
from a single major hazard event or less than 5% of the property value within the jurisdiction.
1 2
Economic Low Total economic impact is not likely to be greater than $100,000. 1 1
Environmental Low
Environmental impact from a single major hazard event is likely to be minimal, requiring little to no outside resources and support, and/or minimal repair, clean-up, restoration, or preservation work.
1 1
Essential Operations Low
Impact less than 24 hours on the ability of the jurisdiction to meet the essential day-to-day operational demands
and needs of the community from a single major hazard
event.
1 1
Future Development Low Future development trends will minimally increase impact/consequence of this hazard. 1 1
Climate Change Medium Climate Change trends will increase the risk of this hazard and its impacts, but not significantly. 2 2
Tsunami
Population and Life
Safety No Impact Populations exposed to this hazard are not likely to experience significant adverse impacts. 0 0 Underserved/Equity No Impact
Underserved populations exposed to the hazard are not
likely to experience significant adverse/disproportionate impacts.
0 0
Property Damage No Impact Little to no property damage is expected from a single major hazard event. 0 0
Economic No Impact Virtually no significant economic impact. 0 0 Environmental No Impact No environmental impacts from a single major hazard event are likely. 0 0
Essential Operations No Impact
No impact on the ability of the jurisdiction to meet the essential day-to-day operational demands and needs of
the community from a single major hazard event.
0 0
Future Development No Impact
Future development trends will not increase the
impact/consequence of the hazard, and/or may even
decrease the impact/consequence of this hazard.
0 0
Climate Change Low Climate Change trends will minimally increase the risk of this hazard and its impacts. 1 1
Wildfire Population and Life
Safety Medium
Populations exposed to this hazard are likely to
experience some adverse impacts, such as injuries
requiring acute medical care.
2 6
2024 Hazard Mitigation Plan
Contra Costa County, California
City of Pleasant Hill Annex 99
Hazard Event Impact Factor Impact Impact
Factor
Weighted
Factor
Underserved/Equity Medium
Underserved populations exposed to the hazard are likely to experience some adverse/disproportionate impacts,
such as injuries requiring acute medical care.
2 6
Property Damage Medium
More than $500,000 but less than $5 Million in property damages is expected from a single major hazard event, or damages are expected to occur to more than 5% but less
than 15% of the property value within the jurisdiction. 2 4
Economic Medium Total economic impact is likely to be greater than $500,000, but less than or equal to $10 Million. 2 2
Environmental Medium
Environmental impact from a single major hazard event is likely to be localized, requiring some outside resources and support; and/or repair, clean-up, restoration, or
preservation work.
2 2
Essential Operations Medium
Impact between 24 and 72 hours on the ability of the
jurisdiction to meet the essential day-to-day operational demands and needs of the community from a single major
hazard event.
2 2
Future Development Medium Future development trends will increase the impact/consequence of this hazard, but not significantly. 2 2 Climate Change High Climate Change trends will significantly increase the risk of this hazard and its impacts. 3 3
Active Shooter Incidents
Population and Life
Safety Medium
Populations exposed to this hazard are likely to
experience some adverse impacts, such as injuries
requiring acute medical care.
2 6
Underserved/Equity Low
Underserved populations exposed to the hazard are likely to experience minimal adverse/disproportionate impacts, such as ambulatory injuries.
1 3
Property Damage Low
Less than $500,000 in property damages is expected
from a single major hazard event or less than 5% of the property value within the jurisdiction.
1 2
Economic Low Total economic impact is not likely to be greater than $100,000. 1 1
Environmental No Impact No environmental impacts from a single major hazard event are likely. 0 0
Essential Operations Medium
Impact between 24 and 72 hours on the ability of the
jurisdiction to meet the essential day-to-day operational demands and needs of the community from a single major
hazard event.
2 2
Future Development Low Future development trends will minimally increase impact/consequence of this hazard. 1 1
2024 Hazard Mitigation Plan
Contra Costa County, California
City of Pleasant Hill Annex 100
Hazard Event Impact Factor Impact Impact
Factor
Weighted
Factor
Climate Change No Impact Climate change trends will not increase the risk of the hazard and its impacts. 0 0
Cybersecurity Threats
Population and Life
Safety Low
Populations exposed to this hazard are likely to
experience minimal adverse impacts, such as ambulatory
injuries.
1 3
Underserved/Equity Low
Underserved populations exposed to the hazard are likely to experience minimal adverse/disproportionate impacts, such as ambulatory injuries.
1 3
Property Damage Low
Less than $500,000 in property damages is expected
from a single major hazard event or less than 5% of the property value within the jurisdiction.
1 2
Economic Medium Total economic impact is likely to be greater than $500,000, but less than or equal to $10 Million. 2 2
Environmental No Impact No environmental impacts from a single major hazard event are likely. 0 0
Essential Operations Medium
Impact between 24 and 72 hours on the ability of the
jurisdiction to meet the essential day-to-day operational demands and needs of the community from a single major
hazard event.
2 2
Future Development Low Future development trends will minimally increase impact/consequence of this hazard. 1 1
Climate Change No Impact Climate change trends will not increase the risk of the hazard and its impacts. 0 0
Hazardous Materials Incidents
Population and Life
Safety Low
Populations exposed to this hazard are likely to
experience minimal adverse impacts, such as ambulatory
injuries.
1 3
Underserved/Equity Low
Underserved populations exposed to the hazard are likely to experience minimal adverse/disproportionate impacts, such as ambulatory injuries.
1 3
Property Damage Low
Less than $500,000 in property damages is expected
from a single major hazard event or less than 5% of the property value within the jurisdiction.
1 2
Economic Medium Total economic impact is likely to be greater than $500,000, but less than or equal to $10 Million. 2 2
Environmental High
Environmental impact from a single major hazard event is likely to be significant, requiring extensive outside
resources and support; and/or repair, clean-up,
restoration, and/or preservation work.
3 3
2024 Hazard Mitigation Plan
Contra Costa County, California
City of Pleasant Hill Annex 101
Hazard Event Impact Factor Impact Impact
Factor
Weighted
Factor
Essential Operations Medium
Impact between 24 and 72 hours on the ability of the
jurisdiction to meet the essential day-to-day operational demands and needs of the community from a single major
hazard event.
2 2
Future Development Low Future development trends will minimally increase impact/consequence of this hazard. 1 1
Climate Change No Impact Climate change trends will not increase the risk of the hazard and its impacts. 0 0
Terrorism
(Weapons of Mass Destruction)
Population and Life
Safety High
Populations exposed to this hazard are likely to
experience significant adverse impacts, such as fatalities and severe injuries.
3 9
Underserved/Equity Low
Underserved populations exposed to the hazard are likely to experience minimal adverse/disproportionate impacts, such as ambulatory injuries.
1 3
Property Damage High
More than $5 Million in property damages is expected
from a single major hazard event, or damages are
expected to occur to 15% or more of the property value
within the jurisdiction.
3 6
Economic High Where the total economic impact is likely to be greater than $10 Million. 3 3
Environmental Medium
Environmental impact from a single major hazard event is likely to be localized, requiring some outside resources and support; and/or repair, clean-up, restoration, or
preservation work.
2 2
Essential Operations High
Impact greater than 72 hours on the ability of the
jurisdiction to meet the essential day-to-day operational demands and needs of the community from a single major
hazard event.
3 3
Future Development Low Future development trends will minimally increase impact/consequence of this hazard. 1 1
Climate Change No Impact Climate change trends will not increase the risk of the hazard and its impacts. 0 0
Utility Interruptions
Population and Life
Safety Medium
Populations exposed to this hazard are likely to
experience some adverse impacts, such as injuries
requiring acute medical care.
2 6
Underserved/Equity Medium
Underserved populations exposed to the hazard are likely to experience some adverse/disproportionate impacts,
such as injuries requiring acute medical care.
2 6
Property Damage No Impact Little to no property damage is expected from a single major hazard event. 0 0
2024 Hazard Mitigation Plan
Contra Costa County, California
City of Pleasant Hill Annex 102
Hazard Event Impact Factor Impact Impact
Factor
Weighted
Factor
Economic Medium Total economic impact is likely to be greater than $500,000, but less than or equal to $10 Million. 2 2
Environmental No Impact No environmental impacts from a single major hazard event are likely. 0 0
Essential Operations Medium
Impact between 24 and 72 hours on the ability of the
jurisdiction to meet the essential day-to-day operational demands and needs of the community from a single major
hazard event.
2 2
Future Development No Impact
Future development trends will not increase the
impact/consequence of the hazard, and/or may even
decrease the impact/consequence of this hazard.
0 0
Climate Change Medium Climate Change trends will increase the risk of this hazard and its impacts, but not significantly. 2 2
2024 Hazard Mitigation Plan
Contra Costa County, California
City of Pleasant Hill Annex 103
APPENDIX E. PLAN ADOPTION
[Placeholder for adoption documentation after State and FEMA Approval]

Pleasant Hill City CouncilApril 7, 2025

Pleasant Hill City Council
April 7, 2025