OC Watersheds Aliso Creek
City and County Boundary Map
The Aliso Creek Watershed covers 30.4 square miles and includes portions of the
cities of Aliso Viejo, Dana Point, Laguna Hills, Laguna Niguel, Laguna Woods, Lake
Forest and Mission Viejo. Its main tributary, Aliso Creek, originates in the Santa
Ana Mountains inside the boundaries of Cleveland National Forest. Smaller tributaries
include Wood Canyon, Sulphur Creek, the Aliso Hills Channel, and English Channel.
In July 1999 the U.S. Army Corps of Engineers (ACOE) completed the Aliso Creek Watershed
Management Feasibility Study. This study was sponsored by the ACOE, County of Orange,
and municipalities and water districts within the Aliso Creek watershed. The Feasibility
Study identified a number of water resource issues including erosion and damage
to habitat and utilities. In 2002, the ACOE completed the Aliso Creek Watershed
Management Study which examined management measures that could address the watershed
problems identified by the feasibility study. The Aliso Creek Ecosystem Restoration
Project was one of the recommended projects resulting from the management study.
A Federal Cost Sharing Agreement has been executed between the ACOE and the County
of Orange to conduct a study, the Aliso Creek Mainstem Ecosystem Restoration Feasibility
Study. The study is current underway with completion slated for the fall of 2011.
For more information about this watershed please contact
Zoila Finch
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