Most local historians, however, consider the official birth of Castaic to be around July of when the California Highway Commission completed a trail over the tops of the mountains from Castaic to Gorman, called the the old Ridge Route. It reduced the old road between Los Angeles and Bakersfield by 60 miles. The Ridge Route was described as two lanes of asphalt with curves that, when added together, made 97 complete circles between Castaic and Gorman.
The curve intensive route was later replaced by Highway 99 in October of A railroad spur line was built from Saugus to Ventura in September of Along with a cattle loading chute to transport locally raised steers, the Southern Pacific Railroad also established a depot at Castaic Junction for local rail travelers. When it was completed in , it was built to a standard meant to withstand a much bigger earthquake. But a massive quake near the dam could have catastrophic consequences if the main dam failed.
Within 18 minutes, the rush of water could flood an area less than 2 miles away. Within an hour, it would be under feet of water. Everything in the flood path from Magic Mountain to the Pacific Ocean in Oxnard could be washed away. Castaic Lake can hold up to , acre-feet of water — enough to fill the Rose Bowl stadium times. If Castaic dam failed and released all its water, a tall wave of water would move south to Castaic Junction, where Interstate 5 meets state Highway Then it would follow gravity west in a broad destructive path along the Santa Clara River and put Oxnard under 5 feet of water.
Climate models show that increased temperatures in California will result in more precipitation falling as rain rather than snow, which will alter river flows throughout the state and result in the potential for even larger extreme events.
To account for these uncertainties and potentially larger inflows, DWR is ensuring that the spillway will function appropriately if it is needed to release water in the future. Dam safety engineers have identified that some of the concrete wall and floor panels in the spillway have shifted, which could lead to erosion if the spillway were used to release water.
DWR is investigating the causes and impacts to target rehabilitation work and ensure the spillway will work appropriately if a need ever arises. Earthquake Resiliency Assessments DWR conducted a stability analysis in , which indicated the dam structure will continue to perform safely, even in the event of a major earthquake. However, other studies indicate that the outlet structures the large towers that allow DWR to release water from the reservoir are vulnerable to collapse in a major earthquake.
DWR is currently conducting seismic retrofits of the access bridge to the outlet structures to ensure that personnel can access the outlet structures should an earthquake occur.
What to Expect During the modernization process, as a cautionary measure, DWR lowers the water level of Castaic Lake slightly during the winter months to provide more capacity in the reservoir to buffer winter run-off, reducing the likelihood that the spillway would need to be employed. Additionally, temporarily reduced water levels may be necessary to conduct various repair efforts of the outlet towers and access bridge. These slightly lower water levels will not impact water supply.
And DWR is working closely with its state partners and local organizations to minimize the extent of recreation impacts. DWR will be operating construction equipment in all phases of the modernization program.
Some localized noise and increased activity may be expected, particularly during rehabilitation construction efforts. DWR anticipates that the modernization efforts of the Program will take about 10 years to complete. Updates and Timeline. Pyramid Rock still exists directly in front of the dam. Construction of the dam began in It was completed in April and the lake opened for recreation a month later.
Can you bring dogs to Castaic Lake? Castaic Lake State Recreation Area welcomes leashed dogs on the trails and at the picnic areas. Fido can enjoy the area, but they aren't permitted on the beaches or in the water at the lake. How deep is the Castaic Lake? How do you pronounce Castaic? Pronunciation controversy Long-time residents have generally held that Castaic is therefore pronounced to rhyme with "beef steak" i. More recently, many have taken to an alternate pronunciation, based on the current spelling, with three syllables, to rhyme with "prosaic" i.
Can you swim at Castaic Lake? Always watch your children when they are in or near the water.
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