Category Archives: Old Alignment

County Highway, Disaster, Floods, Highways, History, Image, Los Angeles Aqueduct, Los Angeles County, Old Alignment, Road Signs, Roads, San Francisquito Canyon, Santa Clarita, Saugus, St Francis Dam

Image of the Week – 3/9/15

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St. Francis Dam site in 2006 from the reservoir side. The crumbling remains of the wing dam are visible on the ridge to the right.
St. Francis Dam site in 2006 from the reservoir side. The crumbling remains of the wing dam are visible on the ridge to the right.

March 12, 2015 will mark the 87th anniversary of the collapse of the St Francis Dam in San Francisquito Canyon, Los Angeles County, California. The collapse occurred just before midnight on March 12, 1928. It is still California’s second largest disaster in terms of lives lost. Approximately 500 people died in the ensuing flood which flowed to the ocean near Oxnard, CA along the Santa Clara River Valley. Only the 1906 San Francisco Earthquake and Fire exceeds the number.

Highways, Image, Old Alignment, Roads, San Diego County, SR-78

Image of the Week – 10/14/14

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Old State 78 near Santa Ysabel with 1920's concrete.
Old State 78 near Santa Ysabel with 1920’s concrete.
Baja California, Earthquake, Geology, Image, Mexico, Old Alignment

Image of the Week – 9/15/14

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Old alignment of Hwy 2, now offset by about 2 feet horizontally and 5 feet vertically.
Old alignment of Mexico Hwy 2, now offset by about 2 feet horizontally and 5 feet vertically.
Highways, Motorcycle, Old Alignment, Ramona, San Diego County, SR-67

Old State 67 near Ramona

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Between 1970 and 1979, State Highway 67 was realigned between Archie Moore Rd and Mussey Grade Rd. This realignment left two sections of paving with white striping intact. Most likely, the paving dates to around 1948 when State 67 was realigned around San Vicente Reservoir.

At Kay Dee Ln, only a section remains intact.
At Kay Dee Ln, only a section remains intact.
East of Kay Dee Ln, another section with striping intact.
East of Kay Dee Ln, another section with striping intact.
Old C-monument right of way marker
Old C-monument right of way marker
Pavement here is broken up as the alignment rejoins State 67.
Pavement here is broken up as the alignment rejoins State 67.
Colton, Highways, Old Alignment, Roads, US 99

Old US 99 in Colton, CA

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Realigned sometime in the 1930’s, the original alignment of US 99 is still visible near the intersection of Valley Blvd and Pepper Ave. Little remains of the original paving of US 99 through the Los Angeles area, so this is a special section.

Looking west along the original paving.
Looking west along the original paving.
Original paving, looking east.
Original paving, looking east.
Cross section of the original paving. Note the lack of rebar. This is most likely from the 1910's.
Cross section of the original paving. Note the lack of rebar. This is most likely from the 1910’s.

Around late 2007, Valley Blvd was again realigned to better accommodate traffic at the I-10 interchange. Sections of the 1930’s paving are now sticking out from under the asphalt.

Colton welcome sign and old Valley Blvd.
Colton welcome sign and old Valley Blvd.
Concrete from the 1930's visible under the asphalt cover.
Concrete from the 1930’s visible under the asphalt cover.
Looking west along Valley toward Pepper Ave.
Looking west along Valley toward Pepper Ave.

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