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EJCDC’s E‑500 is typically used to engage an engineer’s services for a single, specific project. It is drafted for the design-bid-build project delivery system. With minor revisions, it is appropriate for design-negotiate-build project delivery, and can be adapted easily to use in contracting for primary professional services on a variety of other project delivery systems. Project owners and engineering firms have relied on E-500’s overall content, risk allocations, and philosophical approach over the years. The 2020 edition remains consistent with prior standards. In addition, the 2020 E-500 Agreement contains focused improvements, more options, better guidance and instructions, and an improved structure. The 2020 edition of EJCDC’s E-500 has been preapproved for use by USDA-RUS as stated in the updated version of the RUS Bulletin 1780-26, released 5/10/2024.