How many zeroes are in a trillion? Twelve! You don’t see it written out very often, but Central Arizona Project's (CAP) delivery of Colorado River water from 1986 through 2010 has generated in excess of $1 trillion—that’s $1,090,000,000,000—of Arizona's gross state product (GSP). This astounding number was verified by a study recently commissioned by CAP with the W.P. Carey School of Business at Arizona State University.