ASCE OC EWRI Presents: Rancho Mission Viejo DMA-C Flood Basin Project
Wed, Jun 03
|Dave & Buster's Irvine
Learn about the DMA-C Flood Basin in RMV, which will detain a 100-year storm event - preserving the flow capacity of San Juan Creek and providing flood protection for the Cities of San Juan Capistrano and Dana Point.
Time & Location
Jun 03, 2026, 12:00 PM – 1:30 PM
Dave & Buster's Irvine, 661 Spectrum Center Dr, Irvine, CA 92618, USA
About the event
Topic:
Rancho Mission Viejo DMA-C Flood Basin Project, Stormwater Capture & Flood Reduction
Synopsis:
Located on the southern edge of Rancho Mission Viejo's Planning Area 3, the DMA-C Flood Basin will ultimately be 21 acres of open bottom, natural side slope, graded basin. Portions of the already completed Phases 2b, 3, and 4 currently drain to the initial phase of the Flood Basin which has a capacity of 70 AF. With the grading of Phase 6 the ultimate basin grading and construction will be completed, providing a capacity of 170 AF. Upon completion of the watershed development, with Phases 5b, 6, 7, 10, 11, and 12, the tributary area will be 1,275 acres, and the DMA-C Flood Basin will be the first new County of Orange Regional Flood Facility in decades. This project couldn't have come to fruition without Rancho Mission Viejo's partnership with Orange County Flood Control District, Orange…