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2021 Multijurisdictional Local Hazard Mitigation Plan 4.3 DEVELOPMENT 4.3.1 Land Use A key element in risk assessment is to look at existing land use in hazard areas that have a delineated extent, since land use affects the level of risk. For example, an agricultural, low-density use faces a lower risk in a floodplain than a high-density, residential use. Each municipality in San Mateo County has its own land use plan. Unincorporated San Mateo County’s land is used primarily for resource management. Permitted uses include agricultural, commercial, and residential types of development. The County has adopted residential, commercial, industrial, and other resource management land uses to promote community values for the benefit of future generations. Table 4-2 list San Mateo County’s objectives and designations for land use in unincorporated areas. Figure 4-2 shows the distribution of land use in unincorporated San Mateo County. Table 4-2. Land Use Objectives and Designations for Unincorporated San Mateo County Land Use Objectives Land Use Designations Urban Unincorporated Areas  Maximize the efficiency of public facilities, services, and utilities  Minimize energy consumption  Encourage the orderly formation and development of local government agencies  Protect and enhance the natural environment  Revitalize existing developed areas  Discourage urban sprawl.  Residential  Commercial  Office  Industrial  Airport  Institutional  Recreation  General Open Space. Rural Unincorporated Areas  Preserve natural resources  Provide for the managed productive use and monitoring of resources  Provide outdoor recreation  Protect public health and safety.  Agriculture  Lower Density Residential  Recreation  General Open Space  Timber Production  Solid Waste Disposal Facility. 4.3.2 Building Count, Occupancy Class and Estimated Replacement Value Table 4-3 presents planning area building counts by occupancy class. Table 4-4 summarizes estimated replacement value for building structures and contents combined. 4.3.3 Critical Facilities A critical facility is a structure, facility, or other improvement that, because of its function, service area, or uniqueness, provides service that enables the continuous operation of critical business and government functions, and is critical to human health and safety or economic security. Critical facilities are essential to the health and welfare of the population. They become especially important after a hazard event. Critical facilities typically include police and fire stations, schools, and emergency operations centers. They also include infrastructure such as roads and bridges that provide ingress and egress and allow emergency vehicles access to those in need, as well as utilities that provide water, electricity, and communication services to the community. Also included are facilities and railroads that hold or carry significant amounts of hazardous materials with a potential to impact public health and welfare in a hazard event. 4-6