Eastern Contra Costa Transit Authority

Eastern Contra Costa Transit Authority, doing business as Tri Delta Transit, is a U.S. local government transit authority that operates as a federal grant recipient under the Federal Transit Administration (FTA), providing fixed-route bus and demand-response paratransit services to eastern Contra Costa County, California. The authority receives federal operating and capital grants and does not compete for federal contracts; all recent federal funding flows through the Department of Transportation Federal Transit Administration via formula grants and discretionary project grants under CFDA 20.507 (Federal Transit Formula Grants), CFDA 20.526 (Buses and Bus Facilities), CFDA 20.505 (Metropolitan Transportation Planning), and CFDA 20.310 (Enhanced Mobility of Seniors and Individuals with Disabilities).

Tri Delta Transit's federal footprint consists almost exclusively of FTA operating and capital funding. Recent prime grant awards total $144.7 million across 31 awards spanning the past several years, with no federal contract vehicle participation. The authority's work centers on three capability streams: ADA-compliant demand-response paratransit operations serving individuals with disabilities and seniors; fixed-route bus service; and capital infrastructure modernization. Representative recent work includes a $6.5 million project grant awarded August 2025 for replacement and modernization of a bus fueling station and underground storage tanks servicing over 100 revenue vehicles, a $3.0 million project grant awarded June 2026 for administrative and maintenance facility roof replacement and vehicle maintenance bus lift replacement, a $981,628 formula grant awarded March 2026 for procurement and installation of replacement battery electric bus chargers, and a $400,000 project grant awarded August 2025 for comprehensive operational analysis and mobility network redesign under the FTA's Areas of Persistent Poverty program. Operating assistance grants fund ADA demand-response service, with a $2.554 million formula grant from September 2025 and prior-year formula grants for Section 5307 Urbanized Area Formula funding and Section 5310 Enhanced Mobility programs. The authority's sub-award activity is minimal — four sub-awards across the portfolio, awarded to contractors performing preventive maintenance, operating assistance, and facility rehabilitation work.

Customer concentration is absolute: 100% of recent awards derive from the Federal Transit Administration, making Tri Delta Transit entirely dependent on FTA funding streams. Four awards (combined value not specified in the source) face ultimate completion within the next twenty-four months, representing the authority's recompete exposure in that window. The authority consistently declares no intent to sub-award federal funds; all grant work is executed directly. Tri Delta Transit's role is strictly that of a prime grant recipient — not a contractor, not a subcontractor, not a consortia member — and therefore does not participate in federal contracting vehicles or compete for contract opportunities with other vendors.