City of Diamond Bar General Plan Status Report 2023
Period beginning January 1, 2023, and ending December 31, 2023
OVERVIEW
On December 17, 2019, the City Council adopted Diamond Bar General Plan 2040, which is a State mandated document that the City uses to plan the framework for its future physical, social, and economic development. The General Plan is considered a long-term document that projects development within a community for approximately 20 years. The General Plan serves as the foundation for all land use decisions and provides a vision and blueprint about how a community will grow, reflecting community priorities and values while shaping the future.
The City of Diamond Bar General Plan consists of the following eight elements (“Chapters”):
1) Land Use & Economic Development 2) Community Character & Placemaking 3) Circulation 4) Resource Conservation 5) Public Facilities & Services 6) Public Safety 7) Community Health & Sustainability 8) Housing The following information summarizes the status of the goals and policies that the City has implemented for each chapter of the updated General Plan in 2020. Each chapter is organized by color scheme for navigation.
1. Land Use & Economic Development
POLICY # CHAPTER GOALS & POLICIES STATUS DEPARTMENT
LAND USE & ECONOMIC DEVELOPMENT
This chapter provides the overall framework for the physical development of the community and the distribution and intensity of land uses upon which many of the goals and policies in other chapters are based.
GENERAL
Goals
LU-G-4 Land Use
Locate new residential growth in or adjacent to mixed-use centers and transit stations to support regional and statewide efforts to encourage sustainable land use planning and smart growth principles.
In June 2022, the City kicked off the preparation of the Town Center Specific Plan for the Town Center Mixed-Use focus area. The TCSP will provide the regulatory and urban design framework to establish a downtown, or “Town Center” in Diamond Bar as a walkable place with entertainment, retail, restaurants community gathering spaces and urban housing opportunities. Several tasks were commenced and/or completed in 2023. On January 24, the Planning Commission and City Council held a joint study session to discuss project buildout alternatives and approaches to encourage the development of inclusionary housing, and directed staff to evaluate a buildout of 2,055 dwelling units in the EIR. On March 21, the City hosted a community meeting to update the public on the project, with a focus on density and the incorporation of an inclusionary housing component to the plan. The Initial Study and Notice of Preparation (IS/NOP) were published on June 5, and a public scoping meeting was held on June 8 to obtain public input on the scope of environmental issue areas that should be addressed in the Supplemental EIR. Comments on the IS/NOP were received
Community
Development
POLICY # CHAPTER GOALS & POLICIES STATUS DEPARTMENT
through July 5, 2023. Significant progress on the Administrative Drafts of the Specific Plan and Supplemental EIR were made through the end of 2023, and the public review drafts of these documents are anticipated to be released in the spring of 2024.
Policies
LU-P-1 Land Use
Ensure that the scale and massing of new development provides sensitive transitions or design techniques in building height, bulk, and landscaping to minimize impacts on adjacent, less intensive uses, particularly residential uses.
All new development projects are reviewed to ensure compliance with the City’s General Plan policies and design guidelines, including but not limited to, massing and scale of buildings, building materials and colors to blend in with the surrounding environment, appropriate setbacks, building separations and heights, landscaping, and window and door placements. To comply with the Housing
Accountability Act (SB 330), the City’s FY 2023/24 budget includes funding for the hiring of a consultant to assist the city in the preparation of Citywide objective design standards.
Community
Development
LU-P-4 Land Use
Monitor and evaluate potential impacts of proposed adjacent, local, and regional developments to anticipate and require mitigation to the greatest extent feasible to reduce land use, circulation, and economic impacts on Diamond Bar.
On October 30, 2023, the Los Angeles County Department of Regional Planning published a Draft Environmental Impact Report (DEIR) in preparation for the development of 360 dwelling units on a
75.65-acre portion of an existing golf course (Royal Vista Golf Club).
On December 22, 2023, the City provided a letter in response to the DEIR, requesting additional analyses and mitigations be provided to address potential blight, land use and safety, and transportation concerns. The City also requested additional analyses of the potential development on the remaining 80-acre portion of the golf course.
Community
Development
LU-P-5 Land Use
Ensure that adequate public services, facilities, and infrastructure are available or provided to support new development, including water, wastewater, stormwater, solid waste, transportation, public safety, and parks.
Safe, Clean Water Program (Measure W)
Staff prepared and submitted the City’s Measure W Annual Plan to the County of Los Angeles. The Annual Plan outlined the City’s proposed Measure W expenditures for the fiscal year, including CIP projects, routine maintenance, consultant costs, efforts to pursue grant funding, and staff time. As a result, Diamond Bar received its local return of over $8K for FY 2023-2024.
Parks and Facility Projects:
The design of the redevelopment of Maple Hill Park was started in 2023. The project includes the complete replacement of the restroom building and the playground and significant ADA improvements. The design work is scheduled to complete in 2024, with the construction work starting subsequently.
Public Works
POLICY # CHAPTER GOALS & POLICIES STATUS DEPARTMENT
The design of the redevelopment of Heritage Park and Community Center was started in 2023. The project includes significant upgrades to the community center, complete reconstruction of the detached park restroom building, ADA and parking lot
improvements, landscaping, and park facilities upgrades. The design work is scheduled to complete in 2024, with the construction pending funding.
LU-P-6 Land Use
When appropriate, require new development to pay its fair share of the public facilities and off-site improvements needed to serve the proposed use.
The Public Works Dept. requires all new development projects to pay their fair share of public improvements, including a City sewer fee (when applicable), traffic, and road infrastructure.
Public Works
LU-P-7 Land Use
As larger vacant or underutilized sites within the built environment are developed or redeveloped, maximize multimodal accessibility with appropriately designed street networks, and walkable block sizes scaled to proposed uses.
The Town Center Specific Plan (see Goal LU-G-4 above) will establish a fine-grained street and block grid to encourage pedestrian and bicycle circulation, and improved connectivity between the east and west sides of Diamond Bar Boulevard.
Community
Development
RESIDENTIAL
Goals
LU-G-7 Land Use Promote a variety of housing and neighborhood types that respond to a range of income, household sizes, and accessibility levels.
The City began drafting a Development Code amendment for consistency with AB 2221 (Quirk-Silva) and SB 897 (Wieckowski).
The Code amendment is tentatively scheduled for Planning Commission hearing on May 14, 2024.
The City has been processing new ADUs in accordance with the new State laws and continues to encourage ADUs and Junior ADUs, which provide an affordable housing option for lower income households. In 2023, 32 building permits for ADUs were issued.
Community
Development
Policies
LU-P-8 Land Use
Ensure that new residential development be compatible with the prevailing character of the surrounding neighborhood in terms of building scale, density, massing, and design. Where the General Plan designates higher densities, provide adequate transitions to existing development.
All new residential development requires review and approval by the Planning Commission through a Development Review application process to assess a project’s compatibility, architectural design, size, scale and massing with the neighborhood. The Planning
Commission reviews the design to ensure compliance with the City’s General Plan policies and design guidelines, and to minimize adverse effects of the proposed project upon the surrounding properties and the City in general. In compliance with recent legislation, the City has begun the process of formulating objective design standards for residential development, beginning with the drafting of the Town Center Specific Plan regulatory document, and Community
Development
POLICY # CHAPTER GOALS & POLICIES STATUS DEPARTMENT
will embark on the preparation of Citywide objective design standards in 2024.
LU-P-9 Land Use
Incorporate architectural and landscape design features in new development that create more pedestrian-friendly neighborhoods, such as orientation to the street; set-back, or detached garages; tree-lined streets; and landscaped parkways between streets and sidewalks.
Through the development review process, all new development is reviewed to promote high functional and aesthetic architectural and landscape standards to complement and add to the economic, physical, and social character of Diamond Bar.
Community
Development
COMMERCIAL, OFFICE, AND INDUSTRIAL
Goals
LU-G-11 Land Use Support existing commercial centers by encouraging ongoing investment and, where appropriate, reuse and redevelopment.
In 2023, the City approved three Conditional Use Permits for an educational center, dance studio and fitness studio. All three businesses have occupied an existing tenant space, thereby encouraging ongoing investment of the existing commercial center.
In addition, 175 new business licenses were issued in 2023.
Community
Development
Policies
LU-P-13 Land Use
Promote the revitalization of existing neighborhood commercial centers by encouraging property owners to maintain and improve the appearance of individual buildings and commercial centers through building façade improvements, landscaping, and
pedestrian improvements.
The City is working on the creation of an Economic Development page on the City’s website. While the website is still being built, it will likely be launched to the public in 2024.
City Manager’s Office
& Community
Relations
LU-P-14 Land Use
Improve vehicular accessibility, traffic flow, and parking availability as well as pedestrian and bicycle access and amenities within office, commercial, and industrial areas.
During project review, staff ensures that all office, commercial, and industrial areas provide improved vehicular accessibility, traffic flow, and parking availability as well as review for opportunities to incorporate pedestrian and bicycle access and amenities.
Adaptive Traffic Control System
The City's Adaptive Traffic Control System (ATCS) is a traffic management strategy in which traffic signal timing changes or adapts based on actual traffic demand. This is accomplished using an adaptive traffic control system consisting of both hardware and software. The system's deployment (hardware and software) was completed and deployed in 2020. After being in service, the system is serving the City well, especially with all of the regional and local construction projects that are happening in the City. Staff continues to monitor the system for a robust coverage of the traffic circulation on the City’s main arterials.
Community
Development
Public Works
POLICY # CHAPTER GOALS & POLICIES STATUS DEPARTMENT
Diamond Bar Boulevard/SR60 Eastbound Ramp Intersection
project (Diamond Bar Blvd dual left turn to SR-60 East onramp) In 2023, the design work was completed, and an approval (permit) was obtained from Caltrans for the subject project. The project will be done in Caltrans Right-of-Way. It went through a lengthy and detailed approval process with the State agency. With the grant funding approved in 2022, the project will be constructed as a change order to the main 57/60 Confluence Project in 2026-7.
Confluence Project
The construction work on the main SR57/SR60 Confluence Project commenced in 2023. Project improvements will stretch from just south of the northbound SR-57/SR-60 merge to eastbound SR-60 and south of the Golden Springs Drive overpass and along a portion of Grand Avenue from the City of Industry to the City of Diamond Bar. The project will include significant upgrades of the freeway system, including adding lanes and on/off ramps, as well as the replacement of the Grand Ave overcrossing (bridge over the freeway). Although the project is sponsored by Metro, it is implemented by the San Gabriel Valley Council of Governments under an approval and permit issued by Caltrans. Due to work happening on or immediately adjacent to the City right-of-way and the traffic diverted or detoured in or to the City, staff in the Public Works Department are directly involved in the day to day works of the project. The project is scheduled to be completed in 2028.
Grand and Golden Springs Project
The construction of the widening project at the intersection of Grand Ave and Golden Spring Drive continued in 2023. The majority of the work was completed in 2023, and it will be completed in early 2024.
MIXED USE
Goals – General
LU-G-12 Land Use
Encourage compact mixed-use developments and projects that are walkable, designed to encourage community interaction, and fulfill a diversity of local commercial, employment, housing, and recreational needs.
See Land Use Chapter Goal LU-G-4.
Community
Development
LU-G-13 Land Use Maximize multi-modal accessibility to and connectivity within mixed-use areas.
See Land Use Chapter Goal LU-P-7.
Community
Development
POLICY # CHAPTER GOALS & POLICIES STATUS DEPARTMENT
LU-G-14 Land Use
Foster development of nodes or clusters of mixed-use centers to promote city and neighborhood identity, improve accessibility to stores, parks, natural open spaces, and services, and promote walkable, pedestrian-scaled retail and dining destinations.
See Land Use Chapter Goal LU-G-4.
Community
Development
Goals – Town Center Mixed Use
LU-G-22 Land Use
Promote and support the commercial area on both sides of Diamond Bar Boulevard from Golden Springs Drive to SR-60 as a vibrant, pedestrian-oriented Town Center that serves as Diamond Bar’s primary specialty retail and dining destination and is accessible to all Diamond Bar residents.
See Land Use Chapter Goal LU-G-4.
Community
Development
LU-G-23 Land Use Ensure an inviting and comfortable public realm to encourage pedestrian activity in the Town Center area. See Land Use Chapter Goal LU-G-4 and Policy LU-P-7.
Community
Development
LU-G-24 Land Use Allow residential and office uses as secondary to commercial (retail, dining, and entertainment) uses. See Land Use Chapter Goal LU-G-4.
Community
Development
Policies – Town Center Mixed Use
LU-P-35 Land Use
Ensure that any reuse, redevelopment, or refurbishment of the Town Center area maintains a dominance of retail, dining, and entertainment uses. Allow residential uses within the designation’s permitted maximum range, as well as offices, either on upper floors or otherwise in locations that do not detract from the area’s predominant role as a community shopping, dining, and
entertainment destination.
See Land Use Chapter Goal LU-G-4.
Community
Development
LU-P-36 Land Use
Prioritize and support renovation, infill, and reuse of the existing commercial center. Require, where appropriate, redesign and modernization of architectural treatment and the introduction of finer-grained pedestrian network, as well as utilization of parking lots to create central gathering spaces and make the Town Center more pedestrian-friendly.
See Land Use Chapter Goal LU-G-4.
Community
Development
LU-P-37 Land Use
Utilize buildings and streetscapes to define the public realm and encourage pedestrian activity and comfort. To further promote these objectives, incorporate attractive landscaping elements and usable outdoor green spaces, and discourage new drive through uses.
See Land Use Chapter Goal LU-G-4 and Policy LU-P-7.
Community
Development
LU-P-38 Land Use
Promote site designs that create an active street frontage and screen off-street parking from the Diamond Bar Boulevard and Golden Springs Drive frontages.
See Land Use Chapter Goal LU-G-4.
Community
Development
POLICY # CHAPTER GOALS & POLICIES STATUS DEPARTMENT
LU-P-39 Land Use
Streetscape and intersection improvements along the major corridors of South Diamond Bar Boulevard and Golden Springs Drive should enhance connectivity, comfort, and safety for all modes of travel, and increase accessibility to and from surrounding areas.
See Land Use Chapter Goal LU-G-4 and Policy LU-P-7.
Community
Development
LU-P-41 Land Use
Maximize accessibility for transit, automobiles, cyclists, and pedestrians to the Town Center from surrounding neighborhoods, the Metrolink station, and other Diamond Bar destinations.
See Land Use Chapter Goal LU-G-4 and Policy LU-P-7.
Community
Development
LU-P-42 Land Use
Avoid expanses of surface parking and encourage the
consolidation and location of parking to the rear or side of buildings where appropriate.
See Land Use Chapter Goal LU-G-4.
Community
Development
LU-P-43 Land Use
When updating the Development Code’s parking standards or preparing specific plans, evaluate parking ratios for the Town Center to balance the financial feasibility of development projects with the provision of adequate parking for visitors. Coordinate with developers and transit agencies to the extent possible to provide alternative modes of transportation to allow for reduced parking requirements.
See Land Use Chapter Goal LU-G-4.
Community
Development
PUBLIC FACILITIES, OPEN SPACE, AND HILLSIDES
LU-P-56 Land Use
Ensure that development on privately owned, residentially designated land in hillside areas is compatible with surrounding natural areas promoting the following design principles:
a) Minimize—as articulated by the landform grading criteria of the Development Code’s Hillside Management
regulations—excavation, grading, and earthwork to retain natural vegetation and topography;
b) Preserve existing vistas of significant hillside features such as ridgelines, particularly from public places;
c) Do not create unsafe conditions;
d) Incorporate site and architectural designs that are sensitive to natural contours and land forms and hydrological
features;
e) Preserve natural watersheds, including existing vegetation within undeveloped hillside areas to the maximum extent feasible, including mature trees and native plant materials; f) Incorporate fuel modification as part of the Fire
Department’s approved fuel modification program;
g) Utilize planting palettes consisting of drought tolerant, fire resistant, non-invasive plants that are native to or
compatible with those in the surrounding area; and
All new residential development requires review and approval by the Planning Commission through a Development Review application process to ensure compliance with the design principles listed.
Violation Prevention
To preserve resources and prevent code violations, the City issued six NPDES Notices of Violation, mostly related to illicit discharges into the storm drain system.
Community
Development
Public Works
POLICY # CHAPTER GOALS & POLICIES STATUS DEPARTMENT
h) Group plants within swale areas to more closely reflect natural conditions within landform graded slopes.
ECONOMIC DEVELOPMENT
Goals
ED-G-1 Economic Development
Prioritize infill development opportunities and the reuse of existing vacant commercial space to grow the city’s base of residents and employment to ensure long-term fiscal sustainability and promote conservation of natural open space.
See Land Use Chapter Goal LU-G-4.
Community
Development
ED-G-2 Economic Development
Provide for the development of jobs and commercial uses within Diamond Bar to reduce residents’ commutes, and to encourage residents to shop and dine locally.
The TCSP envisions the Town Center to become Diamond Bar’s downtown, a mixed-use village setting where the local workforce can live and work, and provide the greater community with more local options to shop and dine.
Community
Development
ED-G-3 Economic Development Support the retention, rehabilitation, and/or expansion of existing businesses, and the attraction of new businesses.
In October of 2023, the City launched Open Rewards, a purposebuilt application aimed at fostering positive economic growth in communities. This program supported the retention and expansion of existing businesses in town. The pilot program ran during Diamond Bar’s Restaurant Week (October 1st to October 15th) - diners were offered a generous 20% reward for making purchases at Diamond Bar eateries. During the 2-week timeframe over $4,200 in rewards were distributed – amounting to a total economic impact of $22,075.35 or approximately a 5x return on the initial investment.
Also see Land Use Goal LU-G-11.
City Manager’s Office
& Community
Development
Policies – Commercial Centers
ED-P-3 Economic Development
Create commercial centers or districts that have a sense of place and provide attractive places to shop, dine, and gather. Within these areas, support the development of uses and distinct characters that complement other commercial areas within Diamond Bar and adjacent jurisdictions.
See Land Use Chapter Goal LU-G-4.
Community
Development
POLICY # CHAPTER GOALS & POLICIES STATUS DEPARTMENT
ED-P-4 Economic Development
Collaborate with business owners, the Regional Chamber of Commerce – San Gabriel Valley and/or business development organizations to promote shopping and dining opportunities in Diamond Bar. Efforts may include listing information on local business on the City’s website, working with the Regional Chamber or business development organizations to establish and sustain promotional events and programs, increasing local business participation at community events, and developing promotional materials and guides to showcase existing businesses.
The City is actively engaged in collaborative efforts with business owners, the Regional Chamber of Commerce – San Gabriel Valley, and/or business development organizations to boost awareness and participation in shopping and dining opportunities within Diamond Bar. Our joint initiatives focus on promoting the vibrant local dining scene, encouraging community members to explore the diverse offerings during Diamond Bar Restaurant Week. Through strategic marketing campaigns including direct mailings, a dedicated website, social media and partnerships, the City aims to enhance the visibility of local businesses and foster a thriving economic environment.
Regular updates on our collaborative endeavors will be shared to keep the community informed about the progress and impact of these initiatives.
City Manager’s Office
Policies – Community-Serving Uses
ED-P-6 Economic Development
Work with property owners of existing office centers to increase the daytime population and facilitate opportunities to attract quality office tenants and supporting commercial businesses.
The new three-story medical office building in the Brea Canyon Business Park located at 850 S. Brea Canyon Road has completed construction.
Community
Development
ED-P-7 Economic Development Allow for home occupations where compatible with the privacy and residential character of the neighborhood.
Home based businesses are allowed, and are required to comply with the operating standards in Diamond Bar City Code Section
22.42.070, where the business shall be incidental and secondary to the residential use of the property. Modifications that alter the character of the residence or change its occupancy classification are prohibited, and activities that create nuisances, such as glare, light, noise, solid waste, or other characteristics in excess of that customarily associated with similar residential uses are prohibited. 87 home-based business licenses were issued in 2023.
Community
Development
2. Community Character & Placemaking
POLICY # CHAPTER GOALS & POLICIES STATUS DEPARTMENT
COMMUNITY CHARACTER & PLACEMAKING
This Chapter guides the physical form and character of the City by providing strategies to strengthen the City’s identity through both new development and public improvements. Placemaking elements include features such as monuments and decorative treatments that define City entry points, public art installations, decorative streetscape elements at key intersections or districts, and landscaping that creates a memorable and unified character. The Goals and Polices contained in this Chapter provide direction to incorporate such elements into both new development projects and public improvements. The majority of the Goals and Policies are related to the new opportunities within the four mixed-use focus areas and encourage walkable and pedestrian-oriented neighborhoods.
OVERALL CHARACTER & DESIGN
Goals
POLICY # CHAPTER GOALS & POLICIES STATUS DEPARTMENT
CC-G-2
Community Character &
Placemaking
Encourage development within mixed-use areas that is inviting to pedestrians, promotes community interaction and activity, and contributes to an engaging street environment.
See Land Use Chapter Goal LU-G-4 and Policy LU-P-7.
Community
Development
CC-G-4
Community Character &
Placemaking
Preserve the scale and character of existing residential neighborhoods and ensure sensitive transitions between densities and uses.
See Land Use Chapter Policies LU-P-1 and LU-P-8.
Community
Development
CC-G-5
Community Character &
Placemaking
Provide an expanded pedestrian and bicycle infrastructure network to improve connectivity throughout the city where topography and technology permit.
Diamond Bar Boulevard Complete Streets Corridor
The initial design of the Diamond Bar Boulevard Complete Streets Project was completed in 2020. In light of the new TCSP and to implement the City’s new vision for the Town Center area, a redesign effort for a reimagined complete street was started in 2023. The design work is scheduled to be completed in 2024. The City secured $3 million in Metro grant funding for construction. To ensure adequate funding for the project, the City submitted multiple grant funding requests, and eventually, in 2023, an additional $4M was awarded to the Project under the State’s Transportation Commission’s Active Transportation Program (ATP) Cycle 6 Metropolitan Planning Organization allocation.
Public Works
Policies – City Identity
CC-P-1
Community Character &
Placemaking
Develop visual gateways at entry points to the city and at the entrances to the Neighborhood Mixed Use, Town Center, TransitOriented Mixed Use, and Community Core areas. Establish a gateway design palette and guidelines consistent with the existing gateway at Grand Avenue and Longview Drive, employing the same or a similar elements of streetscape design, monument signage, lighting, and building massing and setback.
Street Name Sign
Replacement of the residential street name signs with the new design (new windmill logo, new typeface, etc.) was completed for half of the City. The second half of the City's residential areas will be covered in 2024.
Replacement of internally illuminated street name signs (with the new design) and LED safety lights for arterial streets was completed in 2023.
Procurement of new bus shelters for the City-wide replacement of bus shelters was completed in 2023. Among other upgrades, the new bus shelters will feature a City logo on the back panel.
Also applies to Circulation Chapter Policies CR-P-20 and CR-P-21.
Public Works
CC-P-4
Community Character &
Placemaking
Continue to support community identity with streetscape improvement and beautification projects in both existing residential areas and commercial centers, as well as new mixed-use areas that incorporate unified landscaping and pedestrian amenities.
Amenities should include seating, bus shelters, pedestrian safety treatments such as sidewalk bulb-outs and widening and improved See Community Character & Placemaking Chapter Policy CC-P-1. Public Works
POLICY # CHAPTER GOALS & POLICIES STATUS DEPARTMENT
crosswalks, and city-branded decorative elements such as street lighting, concrete pavers, tree grates, and theme rails.
CC-P-5
Community Character &
Placemaking
Establish a landscaping palette made up of native, drought-tolerant plants and stormwater management systems with a view to enhancing beautification and sustainable landscaping practices.
See Land Use & Economic Development Chapter Policy LU-P-5 and Community Character & Placemaking Chapter Goal CC-G-5 and Policy CC-P-1.
The streetscape design in the TCSP project area will be centered around reducing the number of years to carbon neutral/zero carbon in order to reduce the effects of climate change by planting evergreen trees and installation of cool pavements such as hydro pavers.
Community
Development &
Public Works
CC-P-9
Community Character &
Placemaking
Encourage pedestrian orientation in mixed-use development using a variety of site planning and architectural strategies, such as locating and orienting buildings to street frontages, plazas, or pedestrian paseos; providing visual transparency through fenestration; entries and arcades close to the street edge and sidewalk; and/or incorporating porches, patios, or outdoor spaces that overlook or interact with front yards or sidewalks.
The TSCP is intended to create vibrant public realm with a high intensity mix of uses to include retail, office, hotel, civic, and residential uses, and a bustling active environment during both day and evening hours. Numerous new public spaces, both hardscape squares and landscaped greener park spaces, will be located throughout the Plan area to provide a variety of environments that will serve residents and downtown visitors alike.
See Land Use Chapter Goal LU-G-4 and LU-P-7 and Community Character & Placemaking Chapter Goal CC-G-5 and Policy CC-P-1 Community
Development
CC-P-11 Community Character &
Placemaking
In residential and mixed-use areas, use traffic calming measures such as pavers, bollards, sidewalk bulb-outs, and speed humps to slow travel speeds.
Neighborhood Traffic Management Program (NTMP)
In residential neighborhoods, the NTMP continues to be an effective tool in providing a procedure to implement traffic calming devices in neighborhoods that experience speeding and cut-through traffic. The program’s goal is to improve the livability of neighborhoods by empowering residents with the proper calming devices to modify driver behavior.
In 2023, a complete revision of the City’s NTMP Guidelines was completed. The Guidelines, which will replace the current Guidelines after the Council’s approval, will significantly improve and streamline the NTMP process by creating two separate procedures (vs. the current one-fit-for-all procedure) for local and broad impact traffic issues.
The design and construction work on both Hawkwood Drive and North Del Sol NTMP neighborhoods were completed, and staff monitored the improvements in 2023. Additionally, as a pilot project for the new NTMP Guidelines, a traffic calming project was completed in the Northampton neighborhood.
Public Works
POLICY # CHAPTER GOALS & POLICIES STATUS DEPARTMENT
Also applies to Circulation Chapter Policies CR-P-22 and CR-P-23 and Community Health & Sustainability Policy CHS-P-29.
Policies – Parks & Open Spaces
CC-P-13 Community Character &
Placemaking
Encourage landscaped common public spaces to be incorporated into new mixed-use development. See Land Use Chapter Goal LU-G-4 and Policy LU-P-7.
Community
Development
CC-P-15 Community Character &
Placemaking
Where public space fronts the sidewalk, ensure that it is primarily open and free of walls or other obstructions (not including trees, lights, and steps). Use landscaping strategically to identify pedestrian entrances and articulate edges for plazas and courtyards.
See Circulation Chapter Policy CR-G-5. Public Works
CC-P-16 Community Character &
Placemaking
Ensure that common spaces be integrated elements of
development, coordinating landscaping and amenities with the projects’ architecture and character.
See Land Use Chapter Goal LU-G-4 and Policy LU-P-7.
Community
Development
Policies – Site Planning & Parking
CC-P-17 Community Character &
Placemaking
Encourage the aggregation of individual small lots into larger development parcels within mixed-use areas that will support an appropriately-scaled, cohesive and economically viable
development.
See Land Use Chapter Goal LU-G-4.
The TCSP is an important component of the City’s overall strategy to revitalize older areas and expand housing production. Incentives for lot consolidation are being considered as the TCSP is being crafted to encourage the improvement of underutilized properties.
Community
Development
CC-P-18 Community Character &
Placemaking
As large vacant or underutilized sites are developed or redeveloped, maximize multimodal accessibility with fine-grained street networks and walkable block sizes. Generally limit new block sizes to a maximum of about 400 feet in length. Mid-block plazas or alleys may be considered if the intent is to ensure fine-grained patterns where pedestrian access can be accommodated in intervals no more than 400 feet apart.
See Land Use Chapter Goal LU-G-4 and Policy LU-P-7.
Community
Development
CC-P-21 Community Character &
Placemaking
Site plans should be designed to create pedestrian-oriented neighborhoods that follow these guidelines:
a) Buildings should be oriented to the street;
b) Garages and parking areas should be screened and/or
located at the side or rear of properties wherever possible; and
c) Landscaping, sidewalk conditions, and other streetscape elements should be improved during rehabilitation and new construction.
See Land Use Chapter Goal LU-G-4 and Policy LU-P-7.
The planning goals for the TCSP include the following:
1. To implement the community vision, goals and policies of the General Plan, which established the Town Center Mixed-Use land use designation to “foster the development of a vibrant, pedestrian-oriented Town Center in Diamond Bar that serves as a place for Diamond Bar’s residents to shop, dine, and gather.
Community
Development
POLICY # CHAPTER GOALS & POLICIES STATUS DEPARTMENT
2. To make the town center a complete neighborhood with a sense of place, that takes advantage of its location, to provide residents and visitors a unique experience.
3. Ensure that the physical design and programming of the town center supports health, wellbeing, and environmental
sustainability, the latter so as to make progress toward meeting the greenhouse gas reduction targets of the
Diamond Bar Climate Action Plan by supporting compact,
infill, mixed-use development.
4. The town center allows for car-lite/car-optional living allowing those who choose not to use their car on a daily basis or who choose not to own a car at all to be easily accommodated thus furthering progress to the City’s climate action goals.
5. The town center provides great public spaces, and small parks with regenerative landscapes to support the goal of environmental sustainability.
CC-P-22 Community Character &
Placemaking
Orient buildings adjacent to public spaces such that entries, windows, and seating areas face the public space.
See Land Use Chapter Goal LU-G-4 and Policies LU-P-7 and CCP-21.Community Development
CC-P-23 Community Character &
Placemaking
Where appropriate and feasible, locate and orient active uses (such as commercial uses and parks) along the street edges of new mixed-use development, at street corners, or along main roadways internal to larger developments.
See Land Use Chapter Goal LU-G-4 and Policies LU-P-7 and CCP-21.Community Development
CC-P-25 Community Character &
Placemaking
Encourage the design of shared parking for commercial and office uses where possible.
See Land Use Chapter Goal LU-G-4 and Policies LU-P-7 and CCP-21.Community Development
CC-P-26 Community Character &
Placemaking
Establish reduced minimum commercial parking requirements for all development within new mixed-use land use designations.
Reduced parking requirements should be supported by proximity to transit, shared parking, and technologies that, once mainstreamed, would reduce the need for conventional parking layouts.
See Land Use Chapter Goal LU-G-4 and Policy CC-P-21.
Community
Development
Policies – Building Massing and Design
CC-P-29 Community Character &
Placemaking
Promote the revitalization of existing commercial centers by encouraging property owners to maintain and improve the appearance of individual buildings and commercial centers through building façade improvements, landscaping, and pedestrian improvements.
On September 18, 2023, approval was granted to convert an existing auto repair station to a convenience store at a gas station located at 22628 Golden Springs Drive. The structure was constructed in 1983 and the project will include renovating the building façade as well as enhance the onsite landscaping.
Community
Development
CC-P-30 Community Character &
Placemaking
Ensure that infill residential development is designed to be sensitive to the scale, character, and identity of adjacent existing development.
All new residential development requires review and approval by the Planning Commission through a Development Review application process to assess a project’s compatibility, architectural design, Community
Development
POLICY # CHAPTER GOALS & POLICIES STATUS DEPARTMENT
size, scale and massing with the neighborhood. The Planning Commission reviews the design to ensure compliance with the City’s General Plan policies and design guidelines, and ensure sensitive transitions between densities and uses.
CC-P-32 Community Character &
Placemaking
Emphasize human-scaled design within large-scale commercial and mixed-use centers. Employ measures such as articulated massing, awnings, and landscape elements to break down the scale of development.
See Land Use Chapter Goal LU-G-4 and Policies LU-P-7 and CCP-21.Community Development
CC-P-33 Community Character &
Placemaking
Encourage new mixed-use and commercial development to
incorporate visual quality and interest in architectural design on all visible sides of buildings through the following approaches:
a) Utilizing varied massing and roof types, floor plans, detailed planting design, or color and materials;
b) Maintaining overall harmony while providing smaller-scale variety; and
c) Articulating building facades with distinctive architectural features like awnings, windows, doors, and other such
elements.
See Land Use Chapter Goal LU-G-4 and Policies LU-P-7 and CCP-21.Community Development
TOWN CENTER MIXED USE FOCUS AREA
Goals
CC-G-11 Community Character &
Placemaking
Support an intense mix of active uses on both sides of Diamond Bar Boulevard within the Town Center focus area.
See Land Use Chapter Goal LU-G-4 and Policy LU-P-21.
Community
Development
CC-G-12 Community Character &
Placemaking
Establish an inviting and comfortable public realm that encourages pedestrian activity in the Town Center focus area.
See Land Use Chapter Goal LU-G-4 and Policies LU-P-7 and CCP-21.Community Development
CC-G-13 Community Character &
Placemaking
Establish a new pedestrian-oriented “Main Street” within the Town Center focus area lined with retail uses.
See Land Use Chapter Goal LU-G-4 and Policies LU-P-7 and CCP-21.Community Development
Policies
CC-P-41 Community Character &
Placemaking
Through development review, ensure that the Town Center remains predominantly a community shopping, dining, and entertainment destination, and that residential uses and offices are located so as not to detract from this image.
See Land Use Chapter Goal LU-G-4 and Policy CC-P-21.
Community
Development
CC-P-42 Community Character &
Placemaking
Prioritize retail and other uses that promote pedestrian activity on the ground floor of buildings.
See Land Use Chapter Goal LU-G-4 and Policies LU-P-7 and CCP-21.Community Development
CC-P-43 Community Character &
Placemaking
Establish gateways to the Town Center area at the intersections of Diamond Bar Boulevard and Golden Springs Drive and at Diamond Bar Boulevard and Palomino Drive. Gateway elements should be consistent with the gateway design palette.
See Land Use Chapter Goal LU-G-4 and Policies LU-P-7 and CCP-21.Community Development
POLICY # CHAPTER GOALS & POLICIES STATUS DEPARTMENT
CC-P-44 Community Character &
Placemaking
As the Town Center redevelops, enhance pedestrian connectivity throughout the district through the incorporation of a new “Main Street” within the western portion of the focus area that is off of or set back from Diamond Bar Boulevard.
See Land Use Chapter Goal LU-G-4 and Policies LU-P-7 and CCP-21.Community Development
CC-P-45 Community Character &
Placemaking
The design of new development should be pedestrian-oriented, with the majority of building frontages located at the new street edge and with entrances located along the roadway or along pedestrian pathways or public spaces.
See Land Use Chapter Goal LU-G-4 and Policies LU-P-7 and CCP-21.Community Development
CC-P-46 Community Character &
Placemaking
Ensure that new buildings employ horizontal and vertical building articulation and diversity in color, materials, scale, texture, and building volumes.
See Land Use Chapter Goal LU-G-4 and Policy CC-P-21.
Community
Development
CC-P-47 Community Character &
Placemaking
Develop specific building height and other development standards through implementation mechanisms such as the City’s Zoning Ordinance or a master or specific planning process.
See Land Use Chapter Goal LU-G-4 and Policy CC-P-21.
Community
Development
CC-P-48 Community Character &
Placemaking
Encourage dining establishments to incorporate outdoor dining or sidewalk cafés. See Land Use Chapter Goal LU-G-4 and Policy CC-P-21.
Community
Development
CC-P-49 Community Character &
Placemaking
Encourage reductions in surface parking and allow for the development of consolidated parking structures, provided that they are screened from view from Diamond Bar Boulevard and Golden Springs Drive.
See Land Use Chapter Goal LU-G-4 and Policies LU-P-7 and CCP-21.Community Development
CC-P-50 Community Character &
Placemaking
Where possible, above-grade parking structures should be wrapped with pedestrian uses where they front onto active streets.
If active uses are not feasible, frontages should be architecturally attractive. This may include unique designs and materials such as glass, articulated masonry, murals, or landscaping setbacks.
See Land Use Chapter Goal LU-G-4 and Policies LU-P-7 and CCP-21.Community Development
CC-P-51 Community Character &
Placemaking
Enhance the pedestrian experience along Diamond Bar Boulevard within the Town Center area with widened sidewalks, shade trees, and pedestrian amenities such as street furniture, attractive paving, pedestrian-scaled lighting, and landscape buffers.
See Land Use Chapter Goal LU-G-4 and Policies LU-P-7 and CCP-21.Community Development
3. Circulation
POLICY # CHAPTER GOALS & POLICIES STATUS DEPARTMENT
CIRCULATION
POLICY # CHAPTER GOALS & POLICIES STATUS DEPARTMENT
This Chapter is aimed at improving the transportation network within the City, balancing the circulation needs with safety and access across a variety of modes of transportation, including automobile travel, public transit, non-motorized transportation and goods movement through a Complete Streets approach.
TRANSPORTATION NETWORK AND STREET DESIGN
Goals
CR-G-1 Circulation
Improve the operating efficiency of the transportation system by reducing vehicle travel demand and providing opportunities for other modes of travel. Before approving roadway improvements that focus on increasing vehicle capacity, consider alternatives that reduce vehicle volumes and prioritize projects that would reduce single-occupancy vehicle use and greenhouse gas emissions.
The City’s Transportation Study Guidelines are implemented in the review of the new development projects for, among other things, the mitigation and reduction of the level of Vehicle Mile Traveled (VMT) of the projects. Additionally, in 2023, the City started the process updating the Transportation Study Guidelines per the new requirements and clarifications from the State and the new (2020) model data from SCAG.
Public Works
CR-G-2 Circulation
Maintain a street classification system that considers the broad role of streets as corridors for movement but also reflects a Complete Streets concept that enables safe, comfortable, and attractive access for pedestrians, bicyclists, motorists, and transit users of all ages and abilities, in a form that is compatible with and complementary to adjacent land uses, including neighborhood schools.
See Community Character & Placemaking Chapter Goal CC-G-5. Public Works CR-G-3 Circulation
Strive to achieve a finer grained network of streets and pedestrian/bicycle connections as development occurs, especially in focus areas such as the Transit-Oriented, Neighborhood, Town Center, and Community Core mixed-use areas.
See Land Use Chapter Goal LU-G-4 and Policies LU-P-7 and CCP-21.Community Development
CR-G-4 Circulation
Design roadways serving pedestrian-oriented mixed-use areas to promote neighborhood interaction, pedestrian comfort and walkability, and commercial patronage.
See Land Use Chapter Goal LU-G-4 and Policies LU-P-7 and CCP-21.Community Development
CR-G-5 Circulation
Develop neighborhood streets and alleys that encourage walking, biking, and outdoor activity through engineering and urban design principles that reduce the potential for speeding and cut-through traffic, which may include traffic calming measures.
See Land Use Chapter Goal LU-G-4 and Policies LU-P-7 and CCP-21.Community Development
Policies
CR-P-1 Circulation
When redesigning streets, plan for the needs of different modes by incorporating elements such as shade for pedestrians, safe pedestrian-friendly crossings/ intersections, lighting at the pedestrian scale, bike lanes, signage visible to relevant modes, transit amenities, etc.
Citywide Bus Shelter Replacement
In 2023, the replacement of all bus stop amenities on the City rightof-way was completed. The project replaced all sheltered and unsheltered bus stop amenities city-wide using Prop A funding. This excluded the bus stops upgraded in the past three years by using grant funding from the Foothill Transit Authority.
Public Works
POLICY # CHAPTER GOALS & POLICIES STATUS DEPARTMENT
Additionally, in 2023, a bus shelter was replaced, and one stop was turned from unsheltered to sheltered at Golden Springs Dr. and Calbourne by using the latest grant from Foothill Transit Authority.
Also applies to Circulation Chapter Goal CR-P-3, CR-G-13 and Policies CR-P-8 and CR-P-48
CR-P-2 Circulation
Promote new street designs and efforts to retrofit existing streets in residential neighborhoods minimize traffic volumes and/or speed as appropriate without compromising connectivity for emergency vehicles, bicycles, pedestrians, and users of mobility devices.
Local Highway Safety Improvement Program (HSIP) Project Federal regulations require each state to develop a Strategic Highway Safety Plan (SHSP) to reduce traffic accident fatalities and serious injuries on all public roadways. While the SHSP is used as a statewide approach for improving roadway safety, a Local Road Safety Plan (LRSP) is the means for providing City-owned roads with the opportunity to address unique highway safety needs in their jurisdictions while contributing to the SHSP. The City applied for and was awarded a grant by Caltrans to develop an LRSP. The City’s LRSP was completed, and its findings were presented to the City’s Traffic and Transportation Commission 2022. An LRSP is a recommended prerequisite to apply for specific State Grant applications, including HSIP Grants which are awarded to implement the recommendations in the LRSP. In 2022, the City submitted a Caltrans Cycle 11 HSIP Grant application with a list of proposed traffic improvements. The City was awarded over $300K HSIP grant funding in 2023. The project engineering design started in late 2023.
The goal is to complete the design work in spring 2023 and immediately start the bidding process for construction and installation. The project will improve pedestrian and cyclist safety at nine main intersections of the City with high-visibility crosswalks, upgraded signal heads, and pedestrian crosswalk counter heads.
See Community Character & Placemaking Chapter Goal CC-G-5.
Also applies to Circulation Chapter Policies CR-P-19, CR-P-26, CRP-45, and CR-P-65, and Public Safety Chapter Policy PS-P-35.
Public Works
CR-P-3 Circulation
Plan for and provide new connections within the Transit-Oriented, Neighborhood, Town Center, and Community Core mixed-use areas to create finer grained, pedestrian-scaled circulation networks that support the development of connected and
See Circulation Chapter Policies CR-P-1 and Goal CR-G-13. Public Works
POLICY # CHAPTER GOALS & POLICIES STATUS DEPARTMENT
accessible neighborhoods. Connections should facilitate the use of alternatives to single-occupancy vehicles, such as walking, bicycling, and transit by improving the safety and accessibility of those modes.
CR-P-4 Circulation
Develop traffic calming strategies for Diamond Bar Boulevard between Temple Avenue and Golden Springs Drive in order to provide a safe and comfortable pedestrian-friendly environment along and through the Neighborhood Mixed Use and Town Center Mixed Use areas.
See Community Character & Placemaking Chapter Goal CC-G-5. Public Works CR-P-5 Circulation
Necessary transportation improvements should be in place, or otherwise guaranteed to be installed in a timely manner, before or concurrent with new development. In evaluating whether a transportation improvement is necessary, consider alternatives to the improvement consistent with CR-G-1, and the extent to which the improvement will offset the traffic impacts generated by proposed and expected development.
See Community Character & Placemaking Chapter Goal CC-G-5. Public Works
VEHICLE CIRCULATION
Goals
CR-G-7 Circulation
Ensure smooth traffic flows by maintaining or improving traffic levels of service (LOS) that balance operational efficiency, technological and economic feasibility, and safety.
See Circulation Chapter Goal CR-G-1. Public Works
CR-G-8 Circulation Encourage reduction in vehicle miles traveled (VMT) as part of a strategy to reduce greenhouse gas (GHG) emissions. See Circulation Chapter Goal CR-G-1. Public Works CR-G-9 Circulation
Create and maintain programs for funding transportation improvements, with fair and equitable sharing of transportation improvement costs.
See Circulation Chapter Goal CR-P-2. Public Works
CR-G-10 Circulation Discourage traffic from SR-57 and SR-60 from using Diamond Bar roadways as alternatives to the freeway. See Land Use Chapter Goal LU-P-14. Public Works Policies – Level of Service (LOS) Standards
CR-P-12 Circulation
Balance meeting LOS standards with the need to reduce VMT through maintaining and supporting multi-modal connectivity such as transit, bicycling, walking, and by encouraging infill development with a pedestrian-friendly urban design character.
See Circulation Chapter Goal CR-G-1, Public Works
CR-P-13 Circulation
Maintain a standard of LOS D during peak hour conditions on all streets in the City’s jurisdiction, with exceptions as noted below:
a) Brea Canyon Rd south of Diamond Bar Blvd (LOS F)
b) Brea Canyon Rd north of Diamond Bar Blvd (LOS E)
See Circulation Chapter Goal CR-G-1. Public Works
POLICY # CHAPTER GOALS & POLICIES STATUS DEPARTMENT
c) Grand Ave west of Country View Dr (LOS E)
d) Diamond Bar Blvd at SR-60 Eastbound Ramps (LOS F).
CR-P-14 Circulation
Prioritize pedestrian movement and safety— through wider sidewalks, more frequent pedestrian crossings, sidewalk bulbouts, median pedestrian refuges etc.—rather than LOS in Community Character Priority Areas, which are areas designated for higher density mixed-use development in the General Plan.
See Section 4.4 for more detailed policies on bicycle and pedestrian movement in mixed-use areas.
See Community Character & Placemaking Goal CC-G-5. Public Works CR-P-19 Circulation
Develop a prioritized program to implement measures to reduce traffic collisions at collision hot spots. Continue to monitor collision data for type, location, severity, and cause and update the collision reduction program as needed.
Due to higher-than-normal collision rate observed in 2023 at Diamond Bar Blvd and Mountain Laurel, the City implemented a project to change the signal system at this location from protected/permissive left-turn phasing to protected-only left-turn phasing at this intersection. Protected/permissive left-turn phasing provides a protected phase (green arrow) during one interval and allows unprotected turns (on a circular green) to be made through gaps in the opposing traffic flow during another interval. With this new change, vehicles can make a left turn only during the left turn green arrow. This required changes to the lanes arrangement and the signal heads at the intersection. The City will monitor the other protected/permissive left-turn intersections City-wide for collision causes and rates to implement similar changes, if needed.
Also applies to Circulation Chapter Goal CR-P-2.
Public Works
Policies – Adaptive Traffic Control (ATCS) & Intelligent Traffic Systems (ITS) CR-P-20 Circulation
Implement measures such as additional signal timing and synchronization, speed limit regulations, and ITS techniques to increase safety and reduce congestion. Maintain a pavement management system and maintenance program for all public roadways throughout the City.
See Land Use & Economic Development Chapter Policy LU-P-14.
Battery Back-Up and CCTV Replacement Program
Battery backup units are a critical part of the City’s public safety efforts as they allow traffic signals to operate fully for a short period and then operate on red flash for several hours in an emergency resulting in a power outage. CCTV cameras display live feeds of the City’s most heavily used intersections, allowing staff to view and diagnose any traffic or public safety concerns quickly. The City implemented a multi-year program to replace battery backup systems that have reached their useful life on the City’s 66 signalized intersections. The City is also implementing CCTV cameras at intersections that do not already have them. The year 2 of the project was completed by 2023.
Public Works
POLICY # CHAPTER GOALS & POLICIES STATUS DEPARTMENT
CR-P-21 Circulation
On an ongoing basis, examine opportunities to avoid delay, spillover, or cut-through traffic onto Diamond Bar’s roadways through techniques such as adaptive traffic control systems along major corridors and traffic calming measures along cut-through routes that would reduce speeds and discourage drivers from electing to drive on them. Consider financial and technological feasibility and community priorities to determine whether and how strategies should be implemented.
See Land Use & Economic Development Chapter Policy LU-P-14 and Circulation Chapter Policy CR-P-20.
Public Works
Policies – Safety
CR-P-22 Circulation
Implement traffic calming measures to slow traffic on local and collector residential streets and prioritize these measures over congestion management where appropriate and feasible.
See Community Character & Placemaking Chapter Policy CC-P-11 Public Works CR-P-23 Circulation
Maintain the integrity of existing residential areas and discourage cut-through traffic by retaining cul-de-sacs and implementing other traffic calming measures that promote safe driving at speeds appropriate to the surrounding neighborhood, particularly at Prospectors Road, Chaparral Drive, Sunset Crossing Road, Lycoming Street, and Washington Street.
See Community Character & Placemaking Chapter Policy CC-P-11 Public Works
Policies – Inter-Jurisdictional Coordination
CR-P-26 Circulation
As opportunities arise, coordinate with other jurisdictions, including neighboring cities, Los Angeles County, San Bernardino County, and Caltrans, on improvements to street segments common to the City of Diamond Bar and other jurisdictions.
See Circulation Chapter Policy CR-P-2. Public Works
CR-P-27 Circulation
Encourage improvements to regional routes and arterial streets to account for environmental, aesthetic, and noise concerns, as well as to provide adequate buffers to adjacent land uses.
See Community Character & Placemaking Chapter Policies CC-P-1 Public Works
CR-P-29 Circulation Solicit State and Federal funds to improve area freeways and local streets.
See Community Character & Placemaking Chapter Goal CC-G-5 and Circulation Chapter Goal CR-P-2.
Public Works
PEDESTRIAN AND BICYCLE CIRCULATION
Goals
CR-G-11 Circulation Expand and strengthen existing pedestrian and cyclist network and facilities.
See Community Character & Placemaking Chapter Goal CC-G-5 Public Works
CR-G-12 Circulation Improve safety and accessibility for pedestrians and cyclists. See Community Character & Placemaking Chapter Goal CC-G-5 Public Works Policies – Design & Programs
CR-P-36 Circulation Where appropriate, plant street trees and provide landscaping along major pedestrian and bicycle routes to provide shade and See Circulation Chapter CT-P-36. The project will include those elements.
Public Works
POLICY # CHAPTER GOALS & POLICIES STATUS DEPARTMENT
barriers between cyclists and motorists, as well as enhance aesthetics.
Policies – Bicycle & Pedestrian Movement in Mixed Use Areas CR-P-39 Circulation
Ensure a safe environment for pedestrians and cyclists while allowing for local traffic to access freeways in the Neighborhood Mixed Use area through the following strategies:
a) Widening sidewalks, providing planting strips between sidewalks and streets and providing pedestrian amenities such as shade trees and street furniture along Diamond Bar Boulevard;
b) Implementing traffic calming measures such as reduced vehicle speeds, striping and signage along Diamond Bar
Boulevard;
c) Buffering bike lanes along Diamond Bar Boulevard;
d) Enhancing pedestrian crossings at the intersection of Diamond Bar Boulevard and Sunset Crossing Road, at
Diamond Bar Boulevard and Highland Valley Road, and at
Diamond Bar Boulevard and the SR-60 on/off ramps; and
e) Incorporating multi-use pathways internal to new
development and connecting to existing development.
All these elements and considerations are being incorporated into the design of the Diamond Bar Complete Street Project and the future TCSP. The project is described in Community Character & Placemaking Chapter Goal CC-G-5. After completion, this project will be used as a Complete Street template for the rest of the City.
Public Works
CR-P-40 Circulation
Provide for a vibrant Town Center that encourages pedestrian activity and comfort within the Town Center Mixed Use area while accommodating through traffic along Diamond Bar Boulevard through the following strategies:
a) Establishing a new pedestrian-oriented main street or pedestrian pathway in the Town Center;
b) Enhancing the pedestrian experience along Diamond Bar Boulevard within the Town Center area with widened
sidewalks, shade trees, and pedestrian amenities such as street furniture, attractive paving, pedestrian-scaled lighting, and landscape buffers;
c) Buffering bike lanes along Diamond Bar Boulevard;
d) Improving crosswalks at the intersection of Diamond Bar Boulevard and Palomino Drive, at Diamond Bar Boulevard
and Golden Springs Drive, and where Diamond Bar
Boulevard intersects with the driveway to the Town Center; and
e) Strengthening cyclist and pedestrian connections between the Town Center area and nearby schools to provide safe and convenient routes to the Town Center for students by identifying barriers such as safety hazards and gaps in the See Land Use Chapter Goal LU-G-4 and Policies LU-P-7 and CCP-21.
See Circulation Chapter Goal CR-P-39.
Community
Development
Public Works
POLICY # CHAPTER GOALS & POLICIES STATUS DEPARTMENT
bicycle and pedestrian networks and implementing
improvements to address those barriers.
CR-P-41 Circulation
Promote a fine-grained network of safe pedestrian, bicycle, and vehicle connections in the Transit Oriented Mixed-Use area, emphasizing connectivity to the Metrolink station through the following strategies:
a) Improving crosswalks along Brea Canyon Road and Lemon Avenue;
b) Enhancing the pedestrian experience along South Brea Canyon Road within the Transit Oriented Mixed Use area
with widened sidewalks, shade trees, and pedestrian
amenities such as street furniture, attractive paving, and pedestrian-scaled lighting, where feasible;
c) Providing high-visibility pedestrian and bicycle connections to the Metrolink station;
d) Incorporating multi-use pathways internal to new
development and connecting to existing development; and e) Studying the potential for shuttle, bikeshare, and/or other linkages to improve the convenience of travel within the mixed-use area.
See HSIP Improvements as described in Circulation Chapter Goal CR-P-2
Public Works
Policies – Safety
CR-P-43 Circulation
When planning capital improvement programs, ensure that projects incorporate measures that strengthen the protection of cyclists in bike lanes by implementing improvements such as increasing visibility of lane markings and signage, increasing bike lane widths, raising lanes, designing safer intersection crossings and turns, and buffering lanes from traffic wherever feasible, prioritizing bicycle lanes along arterials.
See Diamond Barl Blvd Complete Street Project as described in Community Character & Placemaking Chapter Goal CC-G-5.
Public Works
CR-P-44 Circulation
Enhance bicycle and pedestrian safety and comfort where feasible through means such as:
a) Introducing bicycle- and pedestrian-level street lighting to improve safety at night;
b) Furnishing intersections with crosswalks on all legs of the intersection;
c) Improving pedestrian safety with intersection design features such as improved signal timing, sidewalk bulbouts, pedestrian refuge islands with “noses” that extend past the crosswalks, advance vehicle stop bars, high visibility
crosswalk striping or decorative paving;
Most of these considerations are being incorporated into the design of the Diamond Bar Complete Streets Project and the future TCSP.
The project is described in Community Character & Placemaking Chapter Goal CC-G-5. After completion, this project will be used as a Complete Street template for the rest of the City
Public Works
POLICY # CHAPTER GOALS & POLICIES STATUS DEPARTMENT
d) Improving bicycle safety with intersection design features such as bicycle detection and signalization, painted bike boxes, and intersection crossing markings;
e) Widening sidewalks, providing planting strips between sidewalks and streets and providing pedestrian amenities such as shade trees and street furniture; and
f) Implementing traffic calming measures to reduce vehicle speeds and congestion.
CR-P-45 Circulation
Routinely review pedestrian and cyclist collision data for type, location, severity, and cause, and develop strategies to prevent these collisions.
These reviews are being done consistently. After every collision, the City staff reviews the police report and, if applicable, makes changes to the circulation system. An example of such change is provided in Circulation Chapter Goal CR-P-19 (Diamond Bal Blvd. and Mountain Laurel). Another example is the HSIP project that was created based on the collision data as described in Circulation Chapter Goal CR-P2.
Public Works
PUBLIC TRANSPORTATION
Goals
CR-G-13 Circulation Support the availability, efficiency, and effectiveness of public transit service.
In 2013, The City actively participated SGV Public Transit Feasibility Study sponsored by Metro and implemented by the San Gabriel Valley Council of Governments (SGVCOG). The feasibility study evaluated options to improve mobility in the San Gabriel Valley. The work continued in 2023 and was completed later in the year with a selection of options that provided the most benefit to the region. The study’s recommended options would connect with Diamond Bar and provide benefits to the residents and businesses.
Also applicable to Circulation Chapter Policy CR-P-3
See Circulation Chapter Policy CR-P-1
Public Works
Policies
CR-P-48 Circulation
As opportunities arise, work with Foothill Transit to maintain and improve bus stops and shelters, as well as identify areas where service can be improved or expanded to increase system use.
In 2023, bus shelters and other transit amenities were replaced Citywide, including the Foothill Transit sponsored bus stop upgrade at Golden Springs Dr. and Calbourne.
Public Works
PARKING
Goals
CR-G-14 Circulation Provide adequate parking for all land use types, while balancing this against the need to promote walkable, mixed-use districts and See Land Use Chapter Goal LU-G-4.
Community
Development
POLICY # CHAPTER GOALS & POLICIES STATUS DEPARTMENT
neighborhoods in targeted areas, and promoting ride-sharing and alternative transportation modes.
Policies – Truck Routes
CR-P-63 Circulation Develop design guidelines for designated truck routes, including proper turning radii at intersections.
The engineering standard already exists and is being used by the City in project reviews.
Public Works
CR-P-64 Circulation
Continue prohibiting trucks heavier than 5 tons from operating on designated residential streets, except for emergency, maintenance, residential moving trucks, and transit vehicles, to maintain pavement integrity.
This is currently being implemented. Public Works
CR-P-65 Circulation
Periodically review collision data for type, location, severity, and cause. Develop countermeasures for sites with recurrent truckinvolved collisions.
This is currently being implemented. Public Works
4. Resource Conservation
POLICY # CHAPTER GOALS & POLICIES STATUS DEPARTMENT
RESOURCE CONSERVATION
A conservation element is required to provide guidance for the conservation, development, and utilization of natural resources, including water quality and hydraulic force, forests, soils, rivers and other waters, harbors, fisheries, wildlife, minerals, and others as applicable to each jurisdiction. An open space element is intended to ensure that cities and counties recognize that open space land is a limited and valuable resource, and that they prepare and carry out open space plans to guide the comprehensive long-range preservation and conservation of open space land. The Resource Conservation Chapter provides policies to guide the City’s stewardship of its resources, ensuring the conservation and enhancement of open spaces, biological resources, water and air quality, and cultural resources.
OPEN SPACE
Goals
RC-G-3 Resource Conservation
Preserve to the extent possible open space ridgelines, hilltops, and prominent slopes for aesthetic, biological and natural resource conservation, and safety purposes.
The Canyon Loop Trail project included many improvements to provide a safer trail experience for residents while preserving the natural habitat. Improvements such as gabion walls, stairs, and water erosion devices will extend the life of the hard pan trail and increase safety for those accessing the trail. These improvements triggered habitat monitoring to comply with all state and federal requirements for the protection, replacement and restoration of native habitat affected by the project. The City contracted with Michael Baker International and Helix Environmental to implement the five-year Habitat Mitigation Monitoring Program to implement mitigation measures supporting the natural habitat found around the Canyon Loop Trail.
Parks & Recreation
Policies
POLICY # CHAPTER GOALS & POLICIES STATUS DEPARTMENT
RC-P-7 Resource Conservation
Minimize visual and environmental impacts to ridgelines, hilltops, and slopes through regulations that minimize grading, ensure that development conforms to natural topography, and maximize safety, correlating development intensity with the steepness of terrain.
Landform grading criteria and maximum allowable densities shall be based upon the slope density formula as set forth in the Development Code.
The Planning Division reviews each project to ensure compliance with the City’s General Plan policies and City’s Hillside Management Design Guidelines. The guidelines were created to ensure that development will complement the character and topography of hillside areas set forth in the Development Code.
Community
Development
RC-P-8 Resource Conservation
To the extent feasible, support and cooperate with the efforts of other jurisdictions and conservation organizations to protect prominent ridges, slopes, and hilltops in and adjacent to the City and its Sphere of Influence.
Such features include, but are not limited to, areas identified by Los Angeles County as Significant Ecological Areas;
Tonner Canyon; the hills within Tres Hermanos Ranch; and the hillsides along SR-57, between Diamond Bar and Brea.
In coordination with the cities of Chino Hills and Industry, a one day guided tour of the Tres Hermanos property was provided free of charge for approximately 100 members of the public on September 23, 2023. The guided tours included exhibits and historical presentations led by local historians, current City Managers and staff.
Parks & Recreation
BIOLOGICAL RESOURCES
Goals
RC-G-5 Resource Conservation Protect rare, threatened, endangered, and other special-status plant and animal communities. See Resource Conservation R-C-G3 Parks & Recreation RC-G-6 Resource Conservation
Utilize native and drought-tolerant vegetation in landscaping, site stabilization and restoration where practical to prevent the spread of invasive plant species into natural open spaces.
See Resource Conservation R-C-G3
During project review, the Planning Division ensures that the plant palette is diverse, Southern California native and drought-tolerant vegetation is utilized, and that the planting and irrigation plans comply with the City’s Water Efficient Landscaping Ordinance.
Parks & Recreation
Community
Development
Policies
RC-P-9 Resource Conservation
Require, as part of the environmental review process prior to approval of discretionary development projects involving parcels within, adjacent to, or surrounding a significant biological resource area, a biotic resources evaluation of the site by a qualified biologist.
Focused plant surveys shall be conducted at the appropriate time of year, and local reference populations checked to ensure detectability of the target species. Wildlife shall also be evaluated by a qualified biologist through appropriate survey or trapping techniques necessary to determine presence. Such evaluation shall analyze the existing and potential natural resources of a given site as well as the potential for significant adverse impacts on biological resources. The report shall identify measures to avoid, minimize, or mitigate any impacts to species that have been observed or have In compliance with the Mitigation Monitoring and Reporting Program (MMRP) for the Canyon Loop Trail project , focused plant and nesting bird surveys were conducted and construction was adjusted to avoid habitat disturbance during the breeding seasons of the California Gnatcatcher and Cactus Wren.
Parks & Recreation
POLICY # CHAPTER GOALS & POLICIES STATUS DEPARTMENT
the potential of being present on the site. In approving any permit based on the evaluation, the City shall require implementation of mitigation measures supported by the evaluation, or work with the applicant to modify the project if mitigation is determined not to be adequate to reduce the impacts to a non-significant level.
RC-P-10 Resource Conservation
Require, to the greatest extent feasible, new development to preserve mature native trees including oak and walnut, and trees of significant cultural or historical value such as sycamore and arroyo willow, etc., as set forth under the Diamond Bar Tree Preservation and Protection Ordinance. Review the ordinance periodically and update it as necessary to reflect current best practices.
The Planning Division reviews each project to evaluate if a protected tree can be preserved or retained on-site. If preservation is not feasible, trees are required to be replanted at a minimum 3:1 ratio pursuant to the City’s Tree Preservation and Protection Ordinance.
Community
Development
WATER RESOURCES
Goals
RC-G-7 Resource Conservation
Protect waterways—including creeks, riverines, artesian springs, seeps, and wetlands—and watersheds in Diamond Bar from
pollution and degradation as a result of urban activities.
See Land Use & Economic Development Chapter Policy LU-P-5.
Also, staff prepared and submitted the City’s annual Urban Runoff and Stormwater NPDES compliance report. The report summarizes the City’s effort for the year on the protection of the City’s storm drain system from pollution.
Public Works
Policies – Water Conservation
RC-P-17 Resource Conservation Continually evaluate and upgrade the efficiency of City irrigation systems, prioritizing the use of reclaimed water. This is being implemented. Public Works RC-P-19 Resource Conservation Encourage the implementation of the latest water conservation technologies into new developments.
Building and Safety requires water conservation fixtures as required by the California Green Building Code (CALGreen) and the California Plumbing Code.
Community
Development
Policies – Water Quality
RC-P-23 Resource Conservation
Ensure that post-development peak stormwater runoff discharge rates do not exceed the estimated predevelopment rate and that dry weather runoff from new development not exceed the predevelopment baseline flow rate to receiving water bodies.
Implemented on all of the development projects through stormwater quality and quantity review (Hydraulic and Hydrology) including through requiring construction and maintenance of Low Impact Development Best Management Practices (LID BMP) and/or Water Quality Management Plans (WQMP).
Public Works
AIR QUALITY
Goals
RC-G-14 Resource Conservation
Aim for a diverse and efficiently-operated local and regional ground transportation system that reduces VMT and generates the minimum amount of pollutants feasible.
See Circulation Chapter Goal CR-G-1 for VMT Guidelines and implementation efforts.
Public Works
POLICY # CHAPTER GOALS & POLICIES STATUS DEPARTMENT
Policies
RC-P-24 Resource Conservation
Encourage new development to minimize impacts on air quality through the following measures: a. Use of building materials and methods that minimize air pollution. b. Use of fuel-efficient heating equipment, and other appliances, such as water heaters, swimming pool heaters, cooking equipment, refrigerators, furnaces, boiler units, and low or zero-emitting architectural coatings. c. Use of clean air technology beyond what is required by South Coast Air Quality Management District (SCAQMD), leveraging State and local funding sources.
• Building & Safety implements CALGreen. Whenever a
building permit is issued for construction, CALGreen requires the building inspector to verify the reduction of dust and volatile organic compounds (VOCs). Dust control measures include watering of dirt on projects that are moving earthwork and VOCs are limited in quantity by requiring materials with certified lower VOCs be used.
• Through the implementation of the California Energy Code and CALGreen, more efficient equipment and reduced VOC’s are required respectively. The CA Energy Code requires
highly efficient heating and cooling systems through requiring high seasonal energy efficiency ratings and energy efficient materials such as low-E (low emissivity) windows. The CA Energy Code also requires high efficacy lighting, energy efficient switching and sensors, certified cooktop hoods, rooftop solar installations in new construction, and mostly instantaneous water heaters for new construction. CALGreen requires low emitting architectural coatings through limiting the VOC’s and requiring certified listed low-emitting products including paints and sealants.
• CALGreen requires clean air within buildings including through requiring higher minimum efficiency reporting value (MERV) filters and minimum outdoor air circulation. Higher filtration removes contaminants and outdoor air circulation reduces carbon dioxide levels within structures
Community
Development
RC-P-25 Resource Conservation
Conserve natural open spaces, biological resources, and vegetation, recognizing the role of these resources in the reduction and mitigation of air pollution impacts, and the promotion of CO2 sequestration.
Building & Safety follows various SCAQMD rules including requiring SCAQMD proof of notification before some projects are demolished, preventing wood burning fireplaces from being installed, prevention of excessive dust on construction sites, and requiring SCAQMD notification prior to the issuance of permits for char-broilers.
Community
Development
RC-P-28 Resource Conservation
Cooperate with the ongoing efforts of the U.S. Environmental Protection Agency (EPA), SCAQMD, the Southern California Association of Governments (SCAG), and the State of California Air Resources Board in improving air quality in the regional air basin.
Building & Safety Department requires all construction projects to provide proper mechanical ventilation systems pursuant to the California Mechanical Code. The California Building Code limits the amount of hazardous materials on a site which could lead to further Toxic Air Contaminants. During construction, dust mitigation and erosion control are required and enforced by the building inspector on any construction project. The remainder of this work is conducted through the Public Works Department.
Community
Development
POLICY # CHAPTER GOALS & POLICIES STATUS DEPARTMENT
RC-P-30 Resource Conservation
For new or modified land uses that have the potential to emit dust, odors, or TACs that would impact sensitive receptors, require the business owners to obtain all necessary
SCAQMD clearances or permits prior to business license or building permit issuance.
The Public Works Department requires an erosion control plan to be provided prior to permit issuance, including sandbags around the property and intermittent watering of a grading site. Prior to any demolition, the Building & Safety Division requires that SCAQMD to be notified before permits are issued.
Public Works
RC-P-33 Resource Conservation
Require construction and grading plans to include State and AQMD-mandated measures to the maximum extent possible
fugitive dust and pollutants generated by construction activities and those related to vehicle and equipment cleaning, fueling and maintenance as well as mono-nitrogen oxides (NOx) emissions from vehicle and equipment operations.
Public Works implements all dust control measures during grading with assistance from Building & Safety Department during construction.
Public Works
Policies – Tribal Cultural Resources
RC-P-46 Resource Conservation
Conduct project-specific Native American consultation early in the development review process to ensure adequate data recovery and mitigation for adverse impacts to significant Native American sites.
Ensure that City staff and local developers are aware of their responsibilities to facilitate Native American consultation under Senate Bill 18 and Assembly Bill 52.
The City contracted with Kizh Nation Resource Management so a representative was on-site each day of ground disturbance during the Canyon Loop Trail project (Assembly Bill 52 requires lead agencies to request consultation with all Native American tribes that have ancestral ties to the area in which a project subject to CEQA is located. The mitigation measures required the City to retain a culturally-affiliated Native American monitor to observe ground-disturbing construction activities for the purpose of identifying the potential presence of any significant historic or prehistoric tribal cultural resources).
Parks & Recreation
5. Public Facilities and Services
POLICY # CHAPTER GOALS & POLICIES STATUS DEPARTMENT
PUBLIC FACILITIES & SERVICES
This Chapter sets forth the policy framework for the City to manage infrastructure and services, identify areas for improvement, and ensure that public utilities, services, and programs can meet the needs of the community into the future.
PARKS & RECREATION
Goals
PF-G-1
Public Facilities &
Services
Maintain and expand the system of parks, recreation facilities, open spaces, and trails that meet the active and passive recreational needs of residents of all ages and abilities.
The City continued to update the outdoor court lighting in youth playgrounds.
The Canyon Loop Trail renovation project was completed in 2023.
Public Works and
Parks & Recreation
POLICY # CHAPTER GOALS & POLICIES STATUS DEPARTMENT
Also, see Maple Hill Park and Heritage Park design work as described in Land Use Chapter Goal LU-P-5.
Policies – General
PF-P-2
Public Facilities &
Services
Continue to seek public input on parks and recreation needs and preferences through surveys, presentation to the Parks and Recreation Commission, neighborhood meetings and workshops, and other community outreach methods as necessary, such as when siting/ designing new parks, when updating the Parks and Recreation Master Plan, when renovating existing parks, etc.
Staff conducted the Maple Hill Public Information session on Wednesday, December 13, 2023 at Maple Hill Park. The information session provided the public with an opportunity to review and comment on the three playground options for the project. An online survey was conducted two weeks after the public information session, allowing for residents to comment online regarding the three playground options. Feedback was overwhelming and indicated that playground option 1 was the clear favorite by residents.
City Manager’s Office
/ Parks & Recreation /
Public Works
PF-P-3
Public Facilities &
Services
Identify and pursue funding and financial resources to acquire land for parks and to continue providing high quality maintenance of parks, trails, and recreational facilities.
Staff applied for Proposition 68 State funding, Measure A and Measure W funding to improve and create parks and open space.
Parks & Recreation
PF-P-5
Public Facilities &
Services
Continue cooperative efforts with the Walnut Valley and Pomona Unified School Districts through joint use agreements for park and recreational facilities.
City staff continue to utilize the revised Joint Use Agreement with Walnut Valley Unified School District for indoor athletic space for community programming.
Parks & Recreation
Policies – Parks & Recreation Facilities
PF-P-13 Public Facilities &
Services
When planning and designing public facilities and parks, take into consideration accessibility, flexible use, adaptability, energy and water efficiency, ease of maintenance, and sustainable design elements that take advantage of the natural processes of healthy ecosystems, while preserving historic and cultural resources and sensitive habitats.
All of these recommendations are being considered in the design of Maple Hill Park and the Heritage Park and Community Center.
Public Works
PF-P-14 Public Facilities &
Services
Preserve existing and future City-owned recreational open space as recreational open space in perpetuity. City-owned recreational open space includes undeveloped areas of City parks that are available for passive recreational use, and portions of designated open space land that have been dedicated to the City for use as trails.
The Canyon Loop Trail project was completed to provide a safer trail experience for residents while preserving the natural habitat.
Improvements such as gabion walls, stairs, and water erosion devices will extend the life of the hard paved trail and increase safety for those accessing the trail.
Parks & Recreation
PF-P-16 Public Facilities &
Services
Continue to provide programming and services for seniors, including active programs, classes, and activities and outings, adjusting programming based on needs and preferences,
particularly as Diamond Bar’s residents age.
The new weekly “Wednesday Walkers” program allows for seniors to walk around parks with a group of other senior residents and City staff to improve health and knowledge of the City.
Parks & Recreation
PF-P-17 Public Facilities &
Services
Address the recreational needs of all children and adults, including persons with disabilities, seniors, and dependent adults, be addressed in recreational facility planning efforts.
All of these recommendations are being considered in the design of Maple Hill Parks and Heritage Park and Community Center.
Public Works
POLICY # CHAPTER GOALS & POLICIES STATUS DEPARTMENT
Policies – Trails
PF-P-21 Public Facilities &
Services
Seek grants and alternative funding mechanisms for trail development and maintenance.
Staff continues to annually apply for Proposition 68 and Habitat Conservation Grant funds, as well as other competitive grant opportunities focused on park development.
Parks & Recreation
Policies – Community Facilities
PF-P-28
Public Facilities &
Services
Continue sponsoring and promoting events and cultural activities that bring the community together in different locations throughout the city.
City staff continues to organize and update City-wide special events such as the Windmill Lighting, Veterans Day, Corporate Showcase, and Bridal Show in order to promote community enrichment and the business community.
Parks & Recreation
UTILITIES
Goals
PF-G-6
Public Facilities &
Services
Ensure that public facilities and services, including water, wastewater, sewage, electricity, natural gas, and solid waste, are provided in a safe, efficient, and timely manner to meet the current and future needs of the city.
Underground Utility District
In 2023, the construction work commenced on the Brea Canyon Rd Underground Utility District. The project uses the City’s $1.6M Rule 20A undergrounding work credit to underground about 2,000 ft of overhead electricity and telecommunication lines in front of Heritage Park and the adjacent school. The project will be completed in 2024.
Also, applies to Public Facilities & Services Chapter Policies PF-P37 and PF-P-38.
Public Works
Policies – Water & Wastewater
PF-P-37
Public Facilities &
Services
As opportunities arise, work with the Los Angeles County Public Works Department (LAC PUBLIC WORKS) and Los Angeles
County Sanitation District (LACSD) to ensure that wastewater treatment conveyance systems and treatment facility capacity is available to serve planned development within Diamond Bar.
Will serve letters from the LACSD are required for building permit issuance to show that adequate sewer facilities are or will be available to serve a proposed Accessory Dwelling Unit (ADU).
Community
Development
6. Public Safety
POLICY # CHAPTER GOALS & POLICIES STATUS DEPARTMENT
PUBLIC SAFETY
The purpose of this Chapter is to identify the natural and man-made public health and safety hazards that exist within the City, and to establish preventative and responsive policies and programs to mitigate their potential impacts, particularly in light of our unique environmental, seismic, and topographic conditions. This Chapter also addresses the excellent public safety services provided by the L.A. County Sheriff’s and Fire Departments, and endorses the continuation of the contract model of government for the continuation of these services. Lastly, the Public Safety Chapter addresses noise and serves to limit the exposure of the community to excessive noise levels. The Goals and Policies emphasize partnerships with local, regional and State agencies to ensure the City’s readiness for public safety threats through action plans and educational efforts.
SEISMIC AND GEOLOGIC HAZARDS
POLICY # CHAPTER GOALS & POLICIES STATUS DEPARTMENT
Goals
PS-G-1 Public Safety
Partner with the Los Angeles County Fire and Sheriff’s Departments in community education efforts aimed at preventing potential loss of life, physical injury, property damage, public health hazards, and nuisances from seismic ground shaking and other geologic hazards such as landslides and mudslides.
The City and its public safety partners continue outreach efforts to residents on safety, including earthquake, fire, and emergency preparedness topics. In particular, the City’s Community Relations Division works closes with public safety members to communicate time sensitive information to residents through the City’s website, as well as the Neighborhood Watch Program and to local businesses using the Business Watch Program. Outreach materials are distributed to the community via print and electronic media that focuses on public safety and emergency preparedness.
Also applies to Public Safety Chapter policy PS-P-5 and goal PS-G5 Community Relations
Policies
PS-P-2 Public Safety
Require areas identified as having significant liquefaction potential (including secondary seismic hazards such as differential compaction, lateral spreading, settlement, rock fall, and landslide) to undergo site-specific geotechnical investigation prior to development and to mitigate the potential hazard to a level of insignificance or, if mitigation is not possible, to preserve these areas as open space or agriculture.
Through the development review process, all projects proposing development on lands with known geotechnical and/or geological issues, including lands identified as Restricted Use Areas (RUA), are required to prepare a Geotechnical Study acceptable to the City Engineer, pursuant to the Municipal Code requirements as provided in Diamond Bar Municipal Code Section 15.00.320.
Public Works
PS-P-4 Public Safety
Carry out a review of City-owned critical facilities that may be vulnerable to major earthquakes and landslides and develop programs to upgrade them.
Diamond Bar Center Slope Stabilization Project
The City became aware of concrete separations along the northern side of the Diamond Bar Center. A decision was made to take preventative measures to ensure long-lasting slope stability and prevent any potential risk to the facility. Therefore in 2020, the City conducted a geotechnical investigation and sampled the soil conditions of the northern slope at the facility. The design of a slope stabilization engineering solution was completed in 2021. The construction work commenced in late 2022 and was completed in 2023.
Public Works
PS-P-6 Public Safety
Prevent and control soil erosion and corresponding landslide risks on public property and in conjunction with new private development through hillside protection and management.
See Public Safety Chapter Policy PS-P-6. Public Works
FLOOD HAZARDS AND PROTECTION
Goals
PS-G-2 Public Safety Implement measures aimed at preventing the potential for loss of life, physical injury, property damage, public health hazards, and The City prepared a comprehensive update to the City’s Hazard Mitigation Plan (Plan) with the assistance of a Federal Emergency City Manager’s Office
POLICY # CHAPTER GOALS & POLICIES STATUS DEPARTMENT
nuisances from the effects of a 100- year storm and associated flooding.
Management Agency (FEMA) grant, which was adopted by the City Council and approved by FEMA in July 19, 2022. Staff is evaluating FEMA grant opportunities to provide funding to implement the Action Items listed in the Plan. The Plan, in concert with the City’s Emergency Operations Plan (EOP), can eventually be used to support resilient planning, mitigation, reconstruction strategies, and response efforts to climate conditions and incidents impacting the community. The Plan review process included a public comment period, including initial submission and review by FEMA. Very High Severity Fire Zones have been mapped throughout the City hillside areas requiring new construction to be fire-resistant at exterior surfaces exposed to wildland areas.
Also applies to Public Safety Chapter goals PS-G-3 and PS-G-8 and policies PS-P-7, PS-P-38, PS-P-39, and PS-P-44
Policies
PS-P-7 Public Safety
Work with the Federal Emergency Management Agency (FEMA) as needed to ensure that the City’s floodplain information is up to date with the latest available hydrologic and hydraulic engineering data.
See Public Safety Chapter goal PS-G-2 City Manager’s Office PS-P-8 Public Safety
Continue to implement flood control programs, such as the City’s Grading and Floodplain Ordinances, that reduce flood hazards to comply with State flood risk management requirements.
See Public Safety Chapter goal PS-G-2 City Manager’s Office PS-P-9 Public Safety
Consider the impacts to health and safety from potential flooding on future development in flood-prone areas, including those identified as being within the 100- or 500-year floodplains. Require installation of protective structures or other design measures to protect proposed building and development sites from the effects of flooding in these areas.
Figure 7-4 (Page 7-12 of the Public Safety Element) shows flood zones in and around the Planning Area based on
FEMA’s 2016 flood hazard data.
See Public Safety Chapter goal PS-G-2 City Manager’s Office
FIRE HAZARDS
Goals
PS-G-3 Public Safety
Partner with the Los Angeles County Fire Department and affiliated agencies to implement hazard mitigation plans and community education efforts aimed at preventing the potential for loss of life, physical injury, property damage, public health hazards, and nuisances from wildland and urban fires.
See Public Safety Chapter goal PS-G-2 City Manager’s Office
POLICY # CHAPTER GOALS & POLICIES STATUS DEPARTMENT
Policies – General
PS-P-14 Public Safety
Educate the public about fire hazards and fire prevention. Work with the County of Los Angeles Fire Department and CAL FIRE to disseminate information on fire weather watches and fire risks and encourage all Diamond Bar residents to engage in risk reduction and fire preparedness activities.
The Los Angeles County Fire Department maintains
information on family fire preparedness plans and risk
reduction measures such as vegetation management.
The City continues to expand upon public education and outreach efforts to educate residents, including the COVID-19 pandemic, fire and weather-related hazards, through a variety of platforms such as City’s website, monthly DBConnection newsletter, public presentations, emergency alert system, and informational videos.
The information, in collaboration with City and Public Safety partners with Los Angeles County Sheriff and Fire Departments, is aimed at improving public safety preparedness efforts, increase resident awareness, and ensure compliance with State and County Public Health Orders. The Los Angeles County Fire Department also has an active fire brush clearance program that incorporates inspections from local fire stations in areas of know fire danger to ensure that residents are aware of mitigation measures they can implement on their property.
Also applies to Public Safety Chapter goal PS-G-9 and policies PSP-18 and PS-P-42 City Manager’s Office
PS-P-16 Public Safety
For privately-owned property within areas designated for development that are subject to high wildfire risk, condition approval of development upon the implementation of measures to reduce risks associated with that development, including, but not limited to, fuel modification plans and Fire Code requirements in effect at the time of project approval.
Prior to building permit issuance, all residential projects located in the High Fire Hazard Severity Zone are required to submit landscape plans designed to comply with the requirements of the Los Angeles County Fire Department’s Fuel Modification Plan Guidelines in terms of plant selection, placement and maintenance. The final landscape and fuel modification plans are submitted to the Los Angeles Fire Department for review and approval.
Community
Development
PS-P-18 Public Safety
Work cooperatively with the County of Los Angeles Fire
Department, CAL FIRE, and fire protection agencies of neighboring jurisdictions to address regional wildfire threats.
See Public Safety Chapter policy PS-P-14 City Manager’s Office Policies – Fire Hazard Severity Zones & State Responsibility Areas PS-P-19 Public Safety
Maintain and update the City’s High Fire Hazard Severity Zones map consistent with changes in designation by CAL FIRE to ensure that the County of Los Angeles Fire Department is protecting the community from wildland-urban fires as future development takes place.
See Public Safety Chapter policy PS-P-14 City Manager’s Office PS-P-20 Public Safety
Prior to permit approval, ensure that all new development located in a Very High Fire Hazard Severity Zone or a State Responsibility Area (SRA) is served by adequate infrastructure, including safe See Public Safety Chapter Policy PS-P-14.
Community
Development
POLICY # CHAPTER GOALS & POLICIES STATUS DEPARTMENT
access for emergency response vehicles, visible street signs, and water supplies for fire suppression.
PS-P-21 Public Safety
Collaborate with the County of Los Angeles Fire Department to ensure that properties in and adjacent to High or Very High Fire Hazard Severity Zones as indicated in Figure 7-6 are adequately protected from wildland fire hazards in a manner that minimizes the destruction of natural vegetation and ecosystems through inspection and enforcement. Update Figure 7-6 as new information becomes available from CAL FIRE.
See Public Safety Chapter Policy PS-P-14.
Community
Development
PS-P-22 Public Safety
Support the County of Los Angeles Fire Department’s Provision of weed abatement and brush thinning and removal services in High and Very High Fire Hazard Severity Areas in order to curb potential fire hazards.
See Public Safety Chapter Policy PS-P-14.
Community
Development
PS-P-23 Public Safety
Where development is proposed within High or Very High Fire Hazard Severity Zones, ensure that the County of Los Angeles Fire Department has the opportunity to review the proposal in terms of its vulnerability to fire hazards and its potential as a source of fire, including fuel modification plan review for new development or additions that are equal or greater than 50 percent of the existing square footage.
Prior to building permit issuance, all residential projects located in the High Fire Hazard Severity Zone are required to submit landscape plans designed to comply with the requirements of the Los Angeles County Fire Department’s Fuel Modification Plan Guidelines in terms of plant selection, placement and maintenance. The final landscape and fuel modification plans are submitted to the Los Angeles Fire Department for review and approval.
Community
Development
HAZARDOUS MATERIALS AND OPERATIONS
Policies
PS-P-25 Public Safety
On sites with known contamination of soil and groundwater, work with State and local agencies to continue to identify and compel cleanup of such sites to ensure that construction workers, future occupants, the public, and the environment are adequately protected from hazards associated with contamination.
The City may reference the State Water Resources Control Board’s Geotracker database and the California Department of Toxic Substances Control’s EnviroStor database to
identify potentially hazardous sites. Figure 7-8 (Page 7-26 of the Public Safety Element) shows sites identified through these databases in 2019.
City staff is continuing to monitor the progress of groundwater remediation of the vacant lot at 23671 Golden Springs Drive. The owner is currently working with the California Regional Water Quality Control Board to test and cleanup releases from underground gas storage tanks, from the former Chevron gas station occupying the site. On December 21, 2023, the California Regional Water Quality Control Board approved a preliminary plan for sampling of the soil for gas vapors, with a requirement to provide a more comprehensive technical report detailing this phase of investigation by March 2024.
Community
Development
PS-P-26 Public Safety
Prohibit (or oppose when outside of the City’s jurisdiction) the development of projects that would reasonably be anticipated to emit hazardous air emissions or handle extremely hazardous substances within a quarter-mile of a school.
The City’s contracted residential and commercial waste haulers continue to offer comprehensive waste collection and curbside recycling services citywide. Curbside recycling services include collection of green waste; bulky items; and household hazardous waste, including electronic waste, used oil, paint products, batteries, garden chemicals, household chemicals and hypodermic needles.
City Manager’s Office
POLICY # CHAPTER GOALS & POLICIES STATUS DEPARTMENT
All City and LA County environmental programs are promoted through a wide variety of outlets, and on an ongoing basis. Program specific flyers and post cards are distributed at City Hall, the Diamond Bar library, Diamond Bar Center, Heritage Park, during events, and as billing inserts. City media outlets include the annual EnviroLink newsletter, the monthly city newsletter DB Connection, an extensive website, and DBTV Channel 3. Additionally, each of the City's waste haulers maintains a website that highlights available programs and instructions for participation. Used motor oil recycling kits (containing a drain container, funnel, filter bags, shop towels, and a filter wrench) were distributed to interested do-it-yourselfers community events, and from City Hall.
The City also works with Los Angeles County Public Works to provide a Household Hazardous Waste (HHW) event in the City once a year. The HHW event takes most forms of electronic and hazardous waste including paint, batteries, and other toxic materials that are recycled and do not enter the waste stream. The City promotes the Los Angeles County Public Works HHW events throughout the year in addition to promoting the County’s hotline 1- 888-CLEAN LA and their dedicated website.
SHERIFF, FIRE, AND EMERGENCY SERVICES
Goals
PS-G-5 Public Safety
Maintain safety services that are responsive to citizens’ needs to ensure a safe and secure environment for people and property in the community.
See Public Safety Chapter Goal PS-G-1 City Manager’s Office PS-G-6 Public Safety
Support community-based policing partnerships to enhance public awareness of crime prevention and strengthen the relationship between the Los Angeles County Sheriff’s Department and neighborhoods throughout the city.
The City continues to distribute information through its “Let’s Talk Public Safety” program, primarily through law enforcement safety blogs and videos. This is a collaboration between the City, the Los Angeles County Sheriff’s Department, and the Los Angeles County Fire Department, and is an extension of the existing Neighborhood Watch and Business Watch programs. The “Coffee with a Cop” meetings are held once a month at locations through the City, where residents and businesses can talk with a member of the Sheriff’s Department about crime and other law enforcement techniques.
Additionally, the City completed installation of 50 Flock Safety Automated License Plate Reader security/surveillance cameras throughout the community.
Also applies to Public Safety Chapter policy PS-P-30
City Manager’s Office
POLICY # CHAPTER GOALS & POLICIES STATUS DEPARTMENT
PS-G-7 Public Safety Provide effective emergency preparedness and response programs.
See Public Safety Chapter policy PS-P-37 City Manager’s Office Policies
PS-P-29 Public Safety
Coordinate with the Los Angeles County Sheriff’s Department for review of applications for new development and for the
intensification of existing development, ensuring that review is consistent with Crime Prevention Through Environmental Design (CPTED) principles.
See Public Safety Chapter goal PS-G-6 City Manager’s Office PS-P-30 Public Safety
Continue to promote the establishment of neighborhood watch and business watch programs to encourage community participation in the patrol of neighborhoods.
See Public Safety Chapter goal PS-G-6 City Manager’s Office PS-P-31 Public Safety
Continue to utilize the contract model of government with Los Angeles County Fire and Sheriff’s Departments and provide facilities, staffing, and equipment to attain the shortest possible response times as set forth by the adopted standards of those public safety organizations.
See Public Safety Chapter goal PS-G-6 City Manager’s Office PS-P-37 Public Safety
Maintain area-wide mutual aid agreements and communication links with adjacent governmental authorities and other participating jurisdictions.
The City continues to expand upon its emergency preparedness and response capabilities through testing and exercises. The dedicated EOC provides the City with added flexibility to coordinate and respond to emergencies, provide redundant communications to public safety agencies, and enable added communications to residents. City Hall also has a backup power generator to ensure critical systems are operational in the event of a prolonged emergency outage, with redundant communications capabilities including the Sheriff’s Department and County Office of Emergency Management (OEM). The City conducted the first introductory EOC training since COVID-19, and will continue efforts with additional training and exercises in collaboration with LA County OEM, local school districts, and adjoining municipalities.
Also applies to Public Safety Chapter goal PS-G-7 and policies PSP-40, PS-P-41, and PS-P-43 City Manager’s Office
EMERGENCY AND DISASTER MANAGEMENT
Goals
PS-G-8 Public Safety
Use the Local Hazard Mitigation Plan and Emergency Operations Plan to address mitigation and response for local hazards, including seismic hazards, flood hazards, fire hazards, hazardous materials incidents, and hazardous sites, and to plan for the protection of See Public Safety Chapter goal PS-G-2 City Manager’s Office
POLICY # CHAPTER GOALS & POLICIES STATUS DEPARTMENT
critical facilities (i.e., schools, hospitals), disaster and emergency response preparedness and recovery, evacuation routes, peak load water supply requirements, and minimum road width and clearance around structures.
PS-G-9 Public Safety
Conduct emergency and disaster management planning in a collaborative manner with State and local agencies and neighboring jurisdictions, while striving for self-sufficiency in City-level emergency response.
See Public Safety Chapter policy PS-P-14 City Manager’s Office Policies
PS-P-38 Public Safety
Maintain, review, and update Diamond Bar’s Local Hazard Mitigation Plan as needed to take into account new hazard conditions in the Planning Area and new emergency management techniques.
See Public Safety Chapter goal PS-G-2 City Manager’s Office PS-P-39 Public Safety
Adopt, implement and update as necessary the Local Hazard Mitigation Plan to develop strategies to address changing risks from flood, drought, fire, landslides, seismic activity, hazardous materials, and other potential hazards, including strategies related to monitoring, emergency preparedness, development policies, conservation, vulnerable populations, and community resilience.
See Public Safety Chapter goal PS-G-2 City Manager’s Office PS-P-40 Public Safety
Continue to coordinate the City’s emergency preparedness and response plans and operations with the State Office of Emergency Management, Los Angeles County, schools, and other neighboring jurisdictions.
See Public Safety Chapter policy PS-P-37 City Manager’s Office PS-P-41 Public Safety
Maintain and expand as necessary community emergency
preparedness resources including personnel, equipment, material, specialized medical and other training, and auxiliary
communications.
See Public Safety Chapter policy PS-P-37 City Manager’s Office PS-P-42 Public Safety
Continue to disseminate public information and alerts regarding the nature and extent of possible natural and manmade hazards, resources identifying measures residents and businesses can take to prepare for and minimize damage resulting from these hazards, citywide response plans, and evacuation routes.
The City and its public safety partners continue outreach efforts on safety topics, including earthquakes, wildfires, weather-related impacts, and emergency preparedness. Information and education resources are made available to residents and businesses through a variety of print and electronic platforms, including the City’s monthly newsletter, Diamond Bar Connection, City website and monthly Safety Speak blog.
City staff routinely uses its social media outlets to increase awareness of its Emergency Alert, (Civic Ready), notification system and to encourage registration by residents and businesses Community Relations
POLICY # CHAPTER GOALS & POLICIES STATUS DEPARTMENT
to receive time-sensitive notices by email, text or voice messages regarding emergency situations, such as evacuations.
PS-P-43 Public Safety
Require all City staff to be adequately trained to respond to emergency situations, and conduct regular emergency
preparedness drills with local organizations including the Los Angeles County fire and Sheriff’s departments.
See Public Safety Chapter policy PS-P-14 City Manager’s Office PS-P-44 Public Safety
Leverage pre- and post-disaster assistance programs to support resilient planning, mitigation, and reconstruction strategies that consider future climate conditions, such as the California Governor’s Office of Emergency Services’ Hazard Mitigation Grant Program and California Disaster Assistance Act.
See Public Safety Chapter policy PS-P-37 City Manager’s Office NOISE
Policies
PS-P-49 Public Safety
Ensure that detailed site-specific noise analysis, including the identification of noise mitigation measures, be prepared for all development proposals located where project noise exposure would be other than normally or conditionally acceptable as specified in Table 7-1. With mitigation, development should meet the allowable exterior and interior noise exposure standards established in the Noise Control Ordinance.
During grading and construction activities, development projects are required to properly muffle all construction equipment to reduce noise levels.
Public Works and
Community
Development
7. Community Health & Sustainability
POLICY # CHAPTER GOALS & POLICIES STATUS DEPARTMENT
COMMUNITY HEALTH & SUSTAINABILITY
The Goals and Policies in this Chapter identify strategies to facilitate healthy and active lifestyles, social connections and celebrating diversity, access to healthy food, and climate change resilience. Many of these strategies could be incorporated into existing or future City programs and Development Code standards.
ACTIVE LIFESTYLE
Goals
CHS-G-3
Community Health &
Sustainability
Promote the use of public parks, recreational and other spaces for healthy exercise and physical activity.
Dozens of enrichment classes and athletic opportunities are provided throughout the year at local parks by the City, independent contracts, or non-profit organizations.
Parks & Recreation
Policies
CHS-P-1
Community Health &
Sustainability
Strive to ensure that all areas of the community have an equal distribution of public parks and public recreational facilities to maximize access.
City staff continues to apply for grant funding in order to complete the conceptualized park on Sunset Crossing, which is in an area of the community determined to be “park poor.”
Parks & Recreation
POLICY # CHAPTER GOALS & POLICIES STATUS DEPARTMENT
SOCIAL CONNECTION
Goals
CHS-G-5
Community Health &
Sustainability
Enhance cultural and generational diversity and social connections through opportunities for volunteerism and civic engagement, public gathering places, public art, family-friendly activities, and events that connect residents to one another, helping them to stay socially active in the community.
The City provides annual City-wide special events and senior programming that support teens looking to volunteer and seniors interested in intergenerational opportunities.
Parks & Recreation
CHS-G-6
Community Health &
Sustainability
Provide safe and welcoming opportunities for meeting and gathering that encourage face-to-face interactions between people.
The Diamond Bar Cener and Heritage Park serve as “home” for six unique senior clubs who meet regularly throughout the week for both organized activity and leisurely gatherings.
Parks & Recreation
Policies
CHS-P-7
Community Health &
Sustainability
Continue to support and promote citywide events that integrate families, schools, and the greater community.
Many City-wide special events include partnerships with both local high schools and a middle school who are responsible for an active role in the event.
Parks & Recreation
CHS-P-9
Community Health &
Sustainability
Encourage and provide volunteer opportunities for residents to engage and support a wide variety of events and activities.
The Parks & Recreation Department offers volunteer opportunities for teens at events, seniors at the Diamond Bar Center, and adults through the youth sports programs.
Parks & Recreation
CHS-P-13 Community Health &
Sustainability
Support the provisions of spaces, programs and facilities across the community to provide opportunities for artistic and cultural engagement and expression for all members of the Diamond Bar community.
The City partnered with Alchemy Theater to provide weekly live performances at Summitridge Park during the summer. These performances were free and took place in a setting similar to Concerts in the Park.
Parks & Recreation
CHS-P-14 Community Health &
Sustainability
Encourage the development of “destinations”—such as the clusters of commercial uses that draw residents from the entire community into the Neighborhood Mixed Use, the Transit-Oriented Mixed Use, and the Town Center focus areas.
See Land Use Chapter Goal LU-G-4 and Policy CC-P-21.
Community
Development
CHS-P-15 Community Health &
Sustainability
Encourage the establishment of gathering areas in new
neighborhoods. See Land Use Chapter Goal LU-G-4 and Policy CC-P-21.
Community
Development
HEALTHCARE & HUMAN SERVICES
Goals
CHS-G-7
Community Health &
Sustainability
Promote health equity, including equal access to health facilities, clinics, goods, services, and economic and educational
opportunities, helping to ensure wellbeing for residents of all ages, abilities, and incomes.
The Diamond Bar Center hosted the Senior Resource Day Fair for over 200 residents and the event provided free access to information regarding healthcare options, financial advice, senior living, and insurance resources for the community.
Parks & Recreation
HEALTHY FOOD
Policies
POLICY # CHAPTER GOALS & POLICIES STATUS DEPARTMENT
CHS-P-21
Community Health &
Sustainability
Promote healthy food and beverages at City-sponsored events, programs, and recreation activities. Ensure that safe, clean drinking water is available for the public at all City-owned buildings where public programs occur.
Clean drinking water is available at all City facilities and a variety of food trucks typically provide an array of food and beverage options at City-sponsored special events. Staff is also provided with clean drinking water at events. Watter bottle filling stations are also included at parks when replacing the previous drinking fountain.
Parks & Recreation
PUBLIC HEALTH AND ENVIRONMENTAL JUSTICE
Policies
CHS-P-30 Community Health &
Sustainability
Support a better informed and civically engaged community by making information available both in print and electronic format, and, to the extent possible, provide this information in the languages predominantly spoken in the community.
The City continues to use a variety of print, electronic and online communication tools to provide information about local and regional programs and services that may affect resident quality of life.
Information is made available to residents via the City website, electronic newsletters, social media platforms, the City’s printed monthly newsletter, (Diamond Bar Connection), and virtual in-person presentations.
Many of the temporary virtual services that were launched in response to COVID-19 pandemic in-person gathering restrictions, have since remained in place to enhance resident engagement, including the use of teleconferencing to participate in City Council and Commission meetings, the option to meet with staff using video, use of online applications to secure permits, and to request services using the City’s mobile app, Diamond Bar Connected.
Community Relations
Policies – Energy Efficiency & Conservation
CHS-P-39 Community Health &
Sustainability
Support Southern California Edison (SCE) and Southern California Gas Company's (SoCalGas) efforts to increase public awareness of energy conservation technology and best practices.
The City has partnered with the San Gabriel Valley Council of Governments (SGVCOG) to increase public awareness of energy conservation technologies and best practices from Southern California Edison and the Gas Company. Information is distributed through the City’s Envirolink newsletter, as well as direct communication from partner agencies and utility providers.
City Manager’s Office
CHS-P-42 Community Health &
Sustainability
Seek funding and other assistance from the South Coast Air Quality Management District for installation of electric vehicle charging stations at appropriate locations throughout the City.
The City continues to explore funding and assistance from the South Coast Air Quality Management District for the installation of electric vehicle charging stations at suitable locations throughout the City.
Regular communication is maintained with the District.
City Manager’s Office
and Public Works
CHS-P-44 Community Health &
Sustainability
Promote energy conservation and retrofitting of existing buildings through the implementation of the Green Building Codes.
The Building & Safety Division implements CALGreen by requiring all construction projects to meet State requirements. This is done through requiring all waste hauling by the City’s franchise hauler or to a recycling facility, requiring low emitting vehicle parking for new commercial projects, limiting VOCs, inspecting erosion control, and requiring low water usage in plumbing.
Community
Development
POLICY # CHAPTER GOALS & POLICIES STATUS DEPARTMENT
Policies – Waste Reduction & Recycling
CHS-P-46 Community Health &
Sustainability
In order to achieve compliance with the source reduction goals set forth under Assembly Bill (AB) 939 amendments thereto,
incorporate solid waste diversion goal performance standards into the contracts with the City’s franchise waste haulers, and enforce the City’s Construction and Demolition Waste Ordinance.
To meet the source reduction goals outlined in Assembly Bill (AB) 939 and its amendments, the City has been actively working on integrating solid waste diversion goal performance standards into contracts with its franchise waste haulers. This strategic initiative aligns with the City’s commitment to compliance and sustainability.
Additionally, efforts are underway to re-enforce the City's Construction and Demolition Waste Ordinance, revised in 2017, reinforcing our dedication to responsible waste management practices. The City Manager’s Department is diligently navigating the implementation process through the negotiation of the solid waste franchise agreements, and further updates will be provided as milestones are achieved.
City Manager’s Office
CHS-P-47
Community Health &
Sustainability
Reduce the disposal of household hazardous wastes in landfills through continued cooperation with waste pick-up service providers, the County Sanitation Districts, and the Los Angeles County Department of Public Works in the provision of curbside pick-up and annual household waste round up events.
The City is actively working to minimize the disposal of household hazardous wastes in landfills through ongoing collaboration with waste pick-up service providers, the County Sanitation Districts, and the Los Angeles County Department of Public Works. Our joint efforts focus on facilitating, organizing and cross promoting annual household waste round-up events. The City is committed to enhancing these initiatives through the successful At Your Door curbside collection program and continuously exploring ways to further reduce the environmental impact of household hazardous wastes in our community.
City Manager’s Office
CHS-P-48
Community Health &
Sustainability
Continue to promote the safe disposal of household hazardous waste through public education and incentives.
The City is steadfast in our commitment to promoting the safe disposal of household hazardous waste through ongoing efforts in public education and incentives. Our initiatives aim to raise awareness about proper disposal methods utilizing the local Ace Hardware takeback program and the importance of responsible waste management. In addition to educational campaigns, we are exploring and implementing incentives to encourage community participation in safe disposal practices. Regular updates on the progress of these initiatives will be provided as we strive to create a safer and more environmentally conscious community.
City Manager’s Office
CHS-P-49
Community Health &
Sustainability
Continue to educate residential, commercial, and industrial generators about source reduction and recycling programs and encourage their participation in these programs through promotional campaigns and incentives.
The City’s ongoing commitment to promoting source reduction and recycling programs involves a comprehensive educational approach targeting residential, commercial, and industrial generators. Through strategic initiatives, the City continues to educate these sectors about the benefits of source reduction and recycling. This includes widespread promotional campaigns aimed at raising awareness and encouraging active participation through waste hauler billing inserts, City Manager’s Office
POLICY # CHAPTER GOALS & POLICIES STATUS DEPARTMENT
City newsletters, social media and the City’s website. Moreover, we are developing and implementing incentives to further motivate and reward engagement in these programs. Regular updates on the progress of these educational and promotional efforts will be provided as the City strives to foster a culture of sustainability across diverse sectors.
CHS-P-50 Community Health &
Sustainability
Encourage generators of edible food to have contracts or agreements with food rescue organizations to minimize edible food from being disposed of or destroyed.
In the City’s ongoing efforts to minimize edible food waste, the City contracted with Abound Food Care and is actively encouraging generators of edible food to establish contracts or agreements with food rescue organizations as mandated under Senate Bill 1383 (SB 1383). This initiative aims to divert edible food from being needlessly disposed of or destroyed. The City is facilitating the establishment of partnerships between generators and food rescue organizations, fostering a collaborative approach to addressing food waste challenges. Regular updates on the progress of these efforts will be provided as we work towards creating a more sustainable and socially responsible system for managing edible food waste.
City Manager’s Office
CHS-P-51 Community Health &
Sustainability
Encourage residents and businesses to compost leaves, grass clippings, food waste, and other organic materials by promoting existing food waste pickup services, residential waste hauler rate composting discounts, and residential backyard composting.
The City is making significant strides in encouraging residents and businesses to participate in composting initiatives. Our efforts involve promoting existing food waste pickup services, providing residential waste hauler rate composting discounts, and encouraging residential backyard composting. Through targeted outreach and awareness campaigns, we aim to highlight the benefits of composting leaves, grass clippings, food waste, and other organic materials. Additionally, residents are informed about available discounts to make composting more accessible. We continue to monitor and enhance these initiatives, ensuring that our community is actively engaged in sustainable waste management practices.
Regular updates on the progress of these programs will be provided as we work towards fostering a greener and more environmentally conscious community.
City Manager’s Office
CHS-P-52 Community Health &
Sustainability
Collaborate with the City’s contract waste haulers to educate and encourage residents and businesses about waste reduction strategies.
The City is making positive strides in our collaboration with the City's contract waste haulers to educate and motivate residents and businesses toward effective waste reduction strategies. Through joint efforts, the City has established educational campaigns, imbedded as franchise agreement requirements, to raise awareness about sustainable waste management practices. These campaigns aim to inform the community about the importance of waste reduction and provide practical strategies for implementation.
Ongoing collaboration ensures that residents and businesses receive consistent and valuable information on reducing waste. As City Manager’s Office
POLICY # CHAPTER GOALS & POLICIES STATUS DEPARTMENT
we move forward, we remain dedicated to strengthening these partnerships and promoting a culture of responsible waste management within our community.
CHS-P-53 Community Health &
Sustainability
Support and cooperate with County and State regulatory agency efforts to require commercial and industrial generators to develop and implement a source reduction and recycling plan tailored to their individual waste streams.
The City is actively supporting and cooperating with County and State regulatory agencies to implement measures that require commercial and industrial generators to develop and execute source reduction and recycling plans tailored to their unique waste streams.
Our collaborative efforts aim to ensure compliance with regulations, where applicable, while promoting sustainable waste management practices among businesses.
City Manager’s Office
Policies – Climate Change Resiliency
CHS-P-57
Community Health &
Sustainability
Encourage water conservation, drought-tolerant landscaping and the use of greywater and reclaimed and recycled water, where appropriate, with a view to reducing water use.
During project review, the Planning Division ensures that the plant palette is diverse, Southern California native and drought-tolerant vegetation is utilized, and that the planting and irrigation plans comply with the City’s Water Efficient Landscaping Ordinance. Also, reclaimed water is required for nonresidential irrigation systems where available.
See Resource Conservation Chapter Goal RC-G-6.
Community
Development
8. Housing – 2021-2029 (6th Cycle) Housing Element Program Evaluation PROGRAM # OBJECTIVES STATUS
HOUSING
The Housing Element, which has been certified by the California Department of Housing and Community Development (HCD) on October 5, 2022, identifies and makes provisions for existing and future housing needs.
While most of these enabling policies require the participation of the private sector, the City also actively participates in implementation by budgeting a portion of its annual Community Development Block Grant (CDBG) allocation and state Permanent Local Housing Allocation (PLHA) funds to administer the City’s Home Improvement Program (HIP). The HIP provides zero-interest deferred loans of up to $30,000 to eligible low-income households to perform essential home repairs and improvements. Low-income households are also eligible to participate in the Los Angeles County Community Development Commission’s CDBG-funded Home Ownership Program (HOP) for first-time homebuyer assistance.
The City will file the Housing Element Annual Progress (APR) with HCD and Office of Planning and Research (OPR) by April 1, 2024, which outlines progress on the implementation of the adopted 2021-2029 (6 th Cycle)
Housing Element. The table below summarizes the 2021-2029 Housing Element housing programs offered through the Community Development Department along with program objectives, accomplishments, and implementation status.
1. Residential Neighborhood Improvement
Program
Continue to implement the code enforcement program, and direct eligible households to available rehabilitation assistance to correct code violations.
Provide focused code enforcement and rehabilitation assistance for 5 to 6 households during the planning period in neighborhoods evidencing concentrations of deteriorating units.
The City continues to operate the code enforcement program. This program is successful and is being continued. Code enforcement cases have increased in number and complexity due to factors including aging housing stock and the declining financial resources of longtime residents. The code enforcement officers and building inspectors are typically the first public officials to learn which homeowners lack the financial resources to correct property maintenance
PROGRAM # OBJECTIVES STATUS
violations, and in the process, become aware of other deferred maintenance issues. The officers carry copies of the City’s Home Improvement Program (HIP) brochures and inform homeowners potentially in need of assistance that the City offers no-interest, deferred loans for essential home repairs.
2. Home Improvement Program
Improve neighborhoods evidencing deferred maintenance through property maintenance and rehab. Provide minor repair and rehabilitation to 4 units annually.
The City allocates at least $100,000 of its annual CDBG award to the Home Improvement Program. The HIP provides zero-interest loans of up to $30,000 to low- and very-low-income homeowners, which do not need to be repaid unless the home is sold or refinanced. There is a waiting list of pre-screened applicants, and HIP loans are processed in the order received.
On June 20, 2023, the City Council approved the expansion of the HIP to utilize both CDBG and PLHA funds to broaden the scope of homeowners eligible to receive HIP loans. Key changes of the updated HIP Program Policies are highlighted below:
• The maximum loan amount for single-family detached homes increased from $20,000 to $30,000.
• Owner-occupants of condominiums that meet the household income requirements are now eligible for HIP loans for up to $20,000, provided that PLHA funds are available. The maximum loan amount is lower than the cap for single-family detached homes because costlier improvements, such as roof maintenance and exterior repairs, are the responsibility of the condominium HOAs, not the individual homeowners.
• PLHA funds may be used to issue loans to households (both single-family detached and condominium) earning up to 150% of the Area Median Income (AMI) for L.A. County. CDBG funds continue to be restricted to owneroccupied households of single-family detached housing earning no more than 80% of AMI.
• A minimum loan amount of $10,000 is now required. Previously, no minimum was specified. Establishing a minimum loan amount encourages homeowners to address more improvements at once, and provides economies of scale with respect to the administrative costs associated with processing loans.
The HIP is successful in improving housing conditions and is being continued at available funding levels.
PROGRAM # OBJECTIVES STATUS
3. Section 8 Rental Assistance Program Continue to direct eligible households to the County Section 8 program.
This program is beneficial in reducing problems such as overpayment and overcrowding. City continues to coordinate with the County on the Section 8 program. Handouts are available at the public counter and contact information is regularly provided to requestors. The program is being continued.
4. Preservation of Assisted Housing Preserve 100 percent of the 149 low- and moderate-income units in The Seasons Apartments.
Diamond Bar contains only one assisted housing project, the 149-unit Seasons Apartments (formerly Heritage Park) for senior citizens. This project was constructed in 1988 and was originally financed under the Los Angeles County Multi-Family Mortgage Revenue Bond program. The project was refinanced in November 1999 under the California Community Development Authority's MultiFamily Housing Re-funding Bond, and was transferred to the Corporate Fund for Housing, a non-profit organization. According to the terms of the new bond agreement, income restrictions for residents and corresponding rent limits were set. For the duration of the bond, which expires December 2, 2034, all units will be affordable: 30 units (20%) will be very-low-income, 82 units (55%) will be lowincome, and 37 units will be moderate-income (defined as 100% AMI). All units will be preserved.
5. Mobile Home Park Preservation Continue to support preservation of the City's two mobile home parks as important affordable housing resources.
Zoning for mobile home parks is successful in preserving this affordable housing option and is being continued. No proposals to close the parks were submitted.
The City will continue to support preservation of its two mobile home parks as important affordable housing resources.
6. First-time Homebuyer Assistance
Programs
Advertise County's Home Ownership Program (HOP) and Mortgage Credit Certificate (MCC) and provide information to interested homebuyers. In addition, the City will work with realtors to make them aware of these programs.
The City advertised these programs on the City website and will provide information to interested homebuyers annually via City newsletters and through social media. In addition, the City will work with realtors to make them aware of these programs.
7. Senior and Workforce Housing
Development
Identify and evaluate sites suitable for new senior and workforce housing. The City will post information on the City website during the first year of the planning period regarding the City's interest in assisting in the development of senior and workforce housing, provide information on available regulatory and financial incentives, and assist developers in applying for funds. The City will also contact local colleges and universities annually to identify potential partnership opportunities for affordable housing.
This program is intended to encourage affordable housing development and is being continued. The City is a member of the San Gabriel Valley Regional Housing Trust (SGVRHT), which is a joint powers authority. SGVRHT’s focus is primarily on providing funding assistance in the planning and construction of new homeless and affordable housing. The Trust provides funding and loans to help bridge funding gaps for affordable housing projects. Land Use Policies 10 and 28, which were adopted in the 2019 General Plan Update, also encourage the production of senior and workforce housing.
8. Land Use Element and Zoning
Maintain adequate sites for housing development at all income levels in conformance with the RHNA and ensure compliance with No Net Loss requirements. Process Development Code amendments to provide adequate sites to accommodate the RHNA. Update all regulations and fees on the City website annually throughout the planning period. Notify water and sewer providers immediately upon adoption of the Housing Element.
The City has maintained adequate sites for housing development at all income levels and ensure compliance with No Net Loss requirements. In May 2022, the City entered into a Consultant Services Agreement with Torti Gallas + Partners to prepare the Town Center Specific Plan (TCSP) in the Town Center MixedUse focus area, which is one of the sites to accommodate the RHNA. Continual progress has been made on the Specific Plan during the planning period.
PROGRAM # OBJECTIVES STATUS
On November 15, 2022, the City notified the water and sewer providers immediately upon adoption of the Housing Element.
9. Mixed Use Development
Prepare handout and marketing materials encouraging mixed-use development where appropriate and make it available to interested developers throughout the planning period.
In December 2019, the City adopted the Comprehensive General Plan Update that created community visions and blueprint for growth and development in the City through 2040. One of the key features of the new General Plan was the establishment of three new Focus Areas where substantial land use changes are planned as part of a strategy to provide walkable mixed-use activity centers.
Goals and policies to promote mixed use developments are as follows: Land Use Goals 12, 14, 15, 16, 18, 19, 22, 24, 26, Land Use Policies 15, 16, 21, 23, 27, 28, 29, 35, 45; Community Character and Placemaking Goals 7, 8, 14, 17; and Circulation Goal 4.
In May 2022, the City entered into a Consultant Services Agreement with Torti Gallas + Partners to prepare the Town Center Specific Plan in the Town Center Mixed-Use focus area. The TCSP will provide the regulatory and urban design framework to establish a downtown, or “Town Center” in Diamond Bar as a walkable place with entertainment, retail, restaurants, community gathering spaces, and urban housing opportunities. This program is an important component of the City’s overall strategy to revitalize older areas and expand housing production. On March 22, 2023, the City held a community meeting to provide an update to the public on the TCSP. The evening presentation provided a recap, suggested preferred plan and alternatives, affordable housing options, concept of the “Road Diet” along Diamond Bar Boulevard and how to create a human scale. 35 residents attended the meeting.
See Land Use Chapter Goal LU-G-4 and Policy CC-P-21.
10. Accessory Dwelling Units Continue to encourage construction of ADUs through an informational handout available at City Hall and on the City website throughout the planning period.
In 2017, the City approved an amendment to the municipal code pertaining to accessory dwelling units to satisfy all of the requirements of Government Code §§65852.150-65852.2. Per AB 68 (Ting), AB 587 (Friedman), AB 671 (Friedman), AB 881 (Bloom), SB 13 (Wieckowski) that went into effect January 1, 2020. In 2021 the City adopted a subsequent amendment to ADU regulations in accordance with the new State laws. The City is currently drafting another Development Code amendment for consistency with the most recent passages of AB 2221 (Quirk-Silva) and SB 897 (Wieckowski). The Code amendment is tentatively scheduled for Planning Commission hearing on May 14,2024. The updated ADU Ordinances have been effective in supporting the production of ADUs and provides affordable rents to low- and moderate-income households. An ADU handout has been created which is being distributed at the public counter. The City continues to encourage accessory dwelling units and this program is being continued.
PROGRAM # OBJECTIVES STATUS
32 building permits for ADUs totaling 22,685 square feet were issued.
11. Housing for Persons with Special Needs
Continue to facilitate emergency shelters and transitional/ supportive housing and continue participating with LAHSA and SGVCOG on efforts to address homelessness throughout the planning period. Process an amendment to the Development Code to allow supportive housing, low barrier navigation centers and large residential care facilities consistent with State law.
The City is currently drafting a Development Code amendment to allow supportive housing and low barrier navigation centers consistent with State law and to replace or modify the CUP requirement to provide greater objectivity and development certainty for residential care facilities serving seven or more persons in all residential zones. The Code amendment is tentatively scheduled for Planning Commission hearing on May 14, 2024.
12. Affordable Housing Incentives/ Density
Bonus
Amend the Development Code in 2021 consistent with current Density Bonus Law and continue to encourage the production of affordable housing through the use of density bonus and other incentives.
This program is being continued in compliance with recent changes to State density bonus law. City staff discusses opportunities for affordable housing and density bonuses with developers for housing projects. As mentioned above, an inclusionary housing requirement is also being considered for the TCSP, in addition to other incentives to increase density. The density bonus program is among several tools the City utilizes to facilitate affordable housing. The City is currently drafting a Development Code amendment for consistency with current Density Bonus Law. The Code amendment is tentatively scheduled for Planning Commission hearing on May 14, 2024.
The City is also a member of the San Gabriel Valley Regional Housing Trust (SGVRHT), which is a joint powers authority. SGVRHT’s focus is primarily on providing fundings assistance in the planning and construction of new homeless and affordable housing. The Trust provides funding and loans to help bridge funding gaps for affordable housing projects.
13. Efficient Project Processing Continue to offer streamlined development processing, and periodically review departmental processing procedures to ensure efficient project processing.
The City continues to offer efficient permit processing. As a small city, staff is able to work closely with applicants through the review and approval process, thereby helping to expedite the entitlement process to issuance of building and zoning permits. In addition, the City has several procedures in place to minimize project review times, which include concurrent processing, pre-application reviews, and recently adopted General Plan EIR, which allows for individual projects that fall within the scope of the EIR to utilize this as environmental clearance under CEQA.
Practices to streamline the issuances for residential projects such as room additions and ADUs have been implemented to eliminate the need to submit a separate application for Planning prior to applying for building permits. The pandemic accelerated implementation of online permit services, and by June 2020, applicants were able to submit applications, plans and payments entirely online. In 2023, the City embarked on the implementation of a new permitting
PROGRAM # OBJECTIVES STATUS
software (Enterprise Land Management system), which will eventually streamline City processes and project processing. This program will be further enhanced through revisions to the Development Code.
14. Affirmatively Furthering Fair Housing
Explore and pursue alternative land use strategies and make necessary amendments to zoning and other land use documents to facilitate a variety of housing choices, including but not limited to higher density opportunities on religious, institutional and quasi-institutional lands, missing middle zoning in addition to SB9 such as SB10, adaptive reuse, more than one JADU per structure, acquiring and adding affordability to existing structures and upzoning with the goal of 50 housing opportunities in the planning period.
On December 21, 2021, the City adopted an urgency ordinance to expand the housing supply in single-family zones by allowing for lot splits and duplexes under the parameters of SB 9. The City intends to adopt a permanent ordinance during the planning period.
The City continues to distribute fair housing information at the public counter through brochures, and refers fair housing related complaints to the Housing Rights Center.
15. Reasonable Accommodation for
Persons with Disabilities
Continue to implement reasonable accommodation procedures for persons with disabilities in compliance with SB 520.
The City supports the provision of housing for disabled persons through zoning opportunities for transitional housing, reasonable accommodation procedures, and programs to facilitate affordable housing. In 2010, the City adopted an ordinance to facilitate reasonable accommodations. This program is an important component of the City’s overall efforts to address the special housing needs of persons with disabilities and is being continued and revised to include additional amendments to City regulations to incorporate recent changes to State law.
The City is currently processing a Development Code amendment to ensure that reasonable housing accommodation procedures do not inadvertently act as a constraint on persons with disabilities. The Code amendment is tentatively scheduled for Planning Commission hearing on May 14, 2024.
Climate Action Plan
CAP POLICIES AND ACTIONS IMPLEMENTATION GENERAL PLAN GOALS & POLICIES CLIMATE ACTION PLAN (“CAP”)
A Climate Action Plan is a comprehensive inventory of specific activities a public agency should undertake to reduce greenhouse gas (“GHG”) emissions that originate within its jurisdiction. The City of Diamond Bar adopted a Climate Action Plan concurrently with the General Plan Update to document how it will be able to reduce its GHG emissions in compliance with State mandates and goals to the year 2040, which is the horizon year for the General Plan Update. The table below lists the General Plan Update goals and policies that have been implemented to reduce GHG emissions, quantifies emissions reductions, and explains how these policies and actions will be implemented and organized according to the following categories: 1. Pedestrian Improvements and Increased Connectivity; 2. Bikeway System Improvements; 3. Traffic Calming; 4. Electric Vehicle Infrastructure; 5. Parking Facilities and Policies; and 6. Transportation Improvements.
1. Pedestrian Improvements and
Increased Connectivity
The General Plan Update includes policies that create more walkable, livable neighborhoods by expanding the multimodal transportation system and creating a safe, pedestrian-oriented environment. Providing an improved pedestrian network and increasing connectivity encourages people to walk more and results in people driving less, causing a reduction in vehicle miles traveled (VMT).
LU-P-9: See status above.
LU-P-14: See status above.
CC-G-5: See status above.
CC-P-4: See status above.
CC-P-7: See status above.
CC-P-9: See status above.
CC-P-21: See status above.
2. Bikeway System Improvements
The General Plan Update provides strategies for maximizing multi-modal accessibility to and connectivity within mixed use areas, including the Metrolink Station and new Town Center. With the total bicycle improvements listed in the General Plan Update, there would be approximately 2.4 miles of bike lanes per square mile. Diamond Bar currently has approximately 2,840 people per square miles. This corresponds to a 0.06 percent reduction in VMT emissions.
LU-P-14: See status above.
CC-G-5: See status above.
CC-P-7: See status above.
CR-G-2: See status above.
CR-P-30: See status above.
CR-P-43: See status above
3. Traffic Calming
A 0.25 percent reduction in VMT was assumed to occur from the traffic calming improvements to make streets safer and more comfortable for pedestrian travel. Traffic calming devices include roundabouts, corner bulb-outs, speed cushions, surface textures, raised pavement, road narrowing, and other devices that encourage people to drive more slowly or to walk or bike instead of using a vehicle, especially for short trips in and around residential neighborhoods.
CR-P-4: See status above.
CR-P-21: See status above.
CR-P-22: See status above.
CR-P-23: See status above.
4. Electric Vehicle Infrastructure
A 0.05 percent reduction in VMT was assumed to occur from installation of electric vehicle infrastructure, which will encourage Diamond Bar residents, businesses, and the City vehicle fleet to switch to clean fuel and electric vehicles in order to reduce energy use and cost and transportation related GHG emissions.
RC-P-28: See status above.
5. Parking Facilities and Policies
Parking policies reflect both the necessity of providing for adequate and appropriately located vehicle and bicycle parking in existing and new development, and priorities related to safety, urban design, and transportation management. Reduced parking standards and other policies reducing parking availability have an estimated 5 to 12.5 percent VMT reduction.
Conservatively assuming the effect of General Plan parking reduction strategies would result in the lower end of VMT reduction, the cumulative reduction from implementations would result in a 5 percent VMT reduction.
N/A
6. Transportation Improvements
Transit service can provide an alternative to automobile travel and is a critical mode of transportation for those who cannot drive or do not have access to a vehicle. The General Plan policies support Metrolink ridership by improving bus, bicycle, and pedestrian connections to the station and by introducing Transit-Oriented Mixed-Use development around the station.
Conservatively assuming the combined effect of these strategies, summing the low end of the VMT reduction ranges gives a 0.62 percent reduction in VMT emissions.
CR-G-13: See status above.
CR-P-48: See status above.