Virtual Tour of US 99
El 4144′ (1966)
Many changes have taken place over the years in Tejon Pass. The first paved roadway, at 4210′, the Ridge Route, was completed here in 1915, paved in 1917, and repaved in 1923. Portions of the 1917 concrete were used as a base for the newer 1923 concrete, which was about 3 feet wider. In 1933, the pass was reconstructed and lowered to 4183′ during the Ridge Route Alternate project. This roadway remained in use until 1951, when US 99 was reconstructed to expressway standards over the pass. None of the 1933 concrete was used here, it was torn up and buried. In 1966, I-5 was built over the pass, lowering the elevation yet again to 4144′. The San Andreas Fault also passes through here, creating the low divide and weaker rock in the pass.
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