The Ventura County Watershed Protection District was formed to provide control and conservation of flood and stormwater and for protection from damage during storm events. Most of Casitas Springs was constructed in the floodplain at the confluence of Fresno Canyon and the Ventura River. Floods have damaged homes and closed State Route 33 several times since 1995. The Fresno Canyon Flood Mitigation project is planned to alleviate flooding by providing a bypass pipe to the Ventura River.
Geocon performed a geotechnical investigation for an outlet structure where the alignment terminates at the Ventura River, a 12-foot-diameter pipeline constructed with pipe jacking methods to cross under SR-33 and a hillside area, and a floodwall and channel structure at the mouth of the canyon.