You may access the UCI on-line, electronic graduate application here. The application process requires three letters of recommendation, a 1-2 page Statement of Purpose, official transcripts from all universities and colleges you have attended, and submission of GRE and TOEFL (where applicable) scores. The Fall application deadline at UCI is January 15 for financial aid consideration; there is a rolling deadline thereafter. The application fee for International applicants is US$110, and US$90 for Domestic applicants. When you complete the application form, it will default to the UCI Office of Graduate Studies, who will forward it to the Department of Civil and Environmental Engineering.
For more information on the application process you may contact April Heath at: firstname.lastname@example.org. Please have your transcripts and any other supplemental materials sent to the Department using the following address:
University of California, Irvine
Department of Civil and Environmental Engineering
Irvine CA 92697-2175
Further information and instruction on the electronic application is available from the UC Irvine Graduate Division at: http://www.grad.uci.edu/admissions/applying-to-uci/.