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to evaluate and validate the results from RetainPro 10. The walls were designed to meet project <br />and concrete design criteria as required by ACI -318 and the ASHTO LFRD method. <br />All designs were based on a concrete ultimate strength (f �) of 4,500 psi and a reinforcing streel <br />yield strength (fy) of 60,000 psi. The detailed structural calculations are included in Appendix D <br />of this report. <br />San Luis Project - South Diversion Ditch Drop Structure - Final Design Report 26 <br />