Rienda C-Complex Flood Basin Recognized with Outstanding Project Award in Flood Management by ASCE OC Chapter

The Rienda C-Complex Flood Basin project was awarded the ASCE OC Chapter Outstanding Project award in the Flood Management category.

This critical flood control facility provides 170 acre-feet of stormwater storage and peak flow mitigation for the 1,300-acre Rienda community. Designed to manage storm events exceeding the high-confidence 100-year storm, the basin features a 144-inch reinforced concrete pipe (RCP), a 72-inch inlet, and a 12’x8’ reinforced concrete box (RCB) outlet, safely conveying up to 3,000 cfs of peak flow.

As one of five planned basins serving the San Juan Creek watershed, the C-Complex Flood Basin plays a vital role in the region’s long-term flood resilience strategy. This award highlights the power of forward-thinking design, technical excellence, and community-focused infrastructure.

We’re proud to have contributed to this impactful, award-winning project alongside a talented team of designers, engineers, and construction professionals. Congratulations to Rancho Mission Viejo, County of Orange, and the project team!