The City of Rancho Mission Viejo, in the heart of Orange County, is undergoing aggressive expansion. CJA was contracted with Flatiron West, Inc. (FCI) to install the CIDH piles for the first of many bridges to facilitate the future expansion. The scope of work included 4ea. – 120” Dia. CIDH Piles and Isolation casings, with a maximum pile length of 116’, and 10ea. – 108” Dia. CIDH Piles and isolation casing, with a maximum pile length of 114’, and two abutments with a total of 64ea. – 18” Dia. Piles to 32’ deep.