Tire-Derived Aggregate (TDA) is made from shredded tires as an alternative to conventional lightweight aggregates that is: Lightweight Free-draining Less expensive Eligible Applicants Include: -All California local government entities, including cities, counties, and cities and counties. -Special districts, including transportation districts. -Joint Powers Authorities in which all JPA members are also eligible applicants. -Public school districts. -All California state agencies, including offices, departments, bureaus, and boards. -University of California, California State University, and California Community Colleges. -Private, for-profit entities. Defined as a business intended to operate at a profit and return a profit to its owner(s). The business must be California-based, or if in another state, must have an operational presence in California: see Application Guidelines and Instructions for complete details and restrictions. -Non-profit organizations, except private elementary or secondary schools, registered with the federal government under section 501(c)(3), (c)(4), (c)(6), or (c)(10) of the Internal Revenue Code. -Qualifying Tribal Entities. A Qualifying Tribal Entity is defined as a tribe, band, nation, or other organized group or community, residing within the borders of California, which: Is recognized for special programs and services provided by the United States to Indians because of the status of its members as Indians or: Can prove that it is a government entity and meets the criteria of the grant program. Eligible projects include: Category 1: Mechanically Stabilized TDA for retaining walls. Category 2: Low Impact Development, stormwater mitigation including stormwater infiltration galleries. Category 3: Lightweight film, slope stabilization, embankment fill, landslide repair, and retaining walls. Category 4: Vibration mitigation under rail lines. Category 5: Landfill application, aggregate replacement projects such as leachate and gas collection systems, drainage layers, and leachate injection. How to apply: Funding - CalRecycle Home Page Applications due October 15, 2026.