Bixby Bridge - Big Sur, California
Bixby Creek Bridge, also known as Bixby Canyon Bridge, on the Big Sur coast of California, is one of the most photographed bridges in California due to its aesthetic design, "graceful architecture and magnificent setting" It is a reinforced concrete open-spandrel arch bridge. The bridge is 120 miles (190 km) south of San Francisco and 13 miles south of Carmel in Monterey County on State Route 1.
Before the opening of the bridge in 1932, residents of the Big Sur area were virtually cut off during winter due to blockages on the often impassable Old Coast Road, which led 11 miles (18 km) inland. The bridge was built under budget for $199,861 (equivalent to $3.29 million in 2021 dollars) and, at 360 feet (110 m), was the longest concrete arch span in the California State Highway System. When it was completed, it was the highest single-span arch bridge in the world, and it remains one of the tallest.
The land north and south of the bridge was privately owned until 1988 and 2001. A logging company obtained approval to harvest redwood on the former Bixby Ranch to the north in 1986, and in 2000 a developer obtained approval to subdivide the former Brazil Ranch to the south. Local residents and conservationists fought their plans, and both pieces of land were eventually acquired by local and federal government agencies. A $20 million seismic retrofit was completed in 1996, although its 24-foot (7.3 m) width does not meet modern standards requiring bridges to be 32 feet (9.8 m) wide.
Location
The bridge is "one of the most photographed features on the West Coast" and in the world. It has been featured on "postcards, TV ads, everywhere," according to Debra Geiler, project manager for the Trust for Public Land. The bridge's location on the scenic Central Coast of California, the parabolic shape of the arch, the tall spandrel columns, and the architectural piers contribute to an "intense aesthetic experience." "It's the gateway to Big Sur and the interior has never been logged. The land is pristine." Zad Leavy, former executive director of the Big Sur Land Trust, described the land as "...the most spectacular meeting of ocean and land in the entire United States."
Characteristics
The bridge is 714 feet (218 m) in total length and 24 feet (7.3 m) wide, with 260 feet (79 m) of clearance below, and has a main span of 360 feet (110 m), which places 50% of the total roadbed above the arch. The arch ribs are five feet thick at the deck and nine feet thick at the springing line, where they join the towers at their base. The arches are four and one-half feet wide. The bridge was designed to support more than six times its intended load.
The two large, vertical buttresses or supporting pillars on either side of the arch, while aesthetically pleasing, are functionally unnecessary. Engineers of later arch bridges such as the Frederick W. Panhorst Bridge omitted them from the design. The Rocky Creek Bridge and the Malpaso Creek Bridge to the north are also open-spandrel arch bridges built of reinforced concrete.
Construction
The state first began building Route 56, or the Carmel–San Simeon Highway, in 1919. A number of bridges needed to be constructed, the largest among them across Bixby Creek.
(Wikipedia)
Bixby Bridge - Big Sur, California
Bixby Creek Bridge, also known as Bixby Canyon Bridge, on the Big Sur coast of California, is one of the most photographed bridges in California due to its aesthetic design, "graceful architecture and magnificent setting" It is a reinforced concrete open-spandrel arch bridge. The bridge is 120 miles (190 km) south of San Francisco and 13 miles south of Carmel in Monterey County on State Route 1.
Before the opening of the bridge in 1932, residents of the Big Sur area were virtually cut off during winter due to blockages on the often impassable Old Coast Road, which led 11 miles (18 km) inland. The bridge was built under budget for $199,861 (equivalent to $3.29 million in 2021 dollars) and, at 360 feet (110 m), was the longest concrete arch span in the California State Highway System. When it was completed, it was the highest single-span arch bridge in the world, and it remains one of the tallest.
The land north and south of the bridge was privately owned until 1988 and 2001. A logging company obtained approval to harvest redwood on the former Bixby Ranch to the north in 1986, and in 2000 a developer obtained approval to subdivide the former Brazil Ranch to the south. Local residents and conservationists fought their plans, and both pieces of land were eventually acquired by local and federal government agencies. A $20 million seismic retrofit was completed in 1996, although its 24-foot (7.3 m) width does not meet modern standards requiring bridges to be 32 feet (9.8 m) wide.
Location
The bridge is "one of the most photographed features on the West Coast" and in the world. It has been featured on "postcards, TV ads, everywhere," according to Debra Geiler, project manager for the Trust for Public Land. The bridge's location on the scenic Central Coast of California, the parabolic shape of the arch, the tall spandrel columns, and the architectural piers contribute to an "intense aesthetic experience." "It's the gateway to Big Sur and the interior has never been logged. The land is pristine." Zad Leavy, former executive director of the Big Sur Land Trust, described the land as "...the most spectacular meeting of ocean and land in the entire United States."
Characteristics
The bridge is 714 feet (218 m) in total length and 24 feet (7.3 m) wide, with 260 feet (79 m) of clearance below, and has a main span of 360 feet (110 m), which places 50% of the total roadbed above the arch. The arch ribs are five feet thick at the deck and nine feet thick at the springing line, where they join the towers at their base. The arches are four and one-half feet wide. The bridge was designed to support more than six times its intended load.
The two large, vertical buttresses or supporting pillars on either side of the arch, while aesthetically pleasing, are functionally unnecessary. Engineers of later arch bridges such as the Frederick W. Panhorst Bridge omitted them from the design. The Rocky Creek Bridge and the Malpaso Creek Bridge to the north are also open-spandrel arch bridges built of reinforced concrete.
Construction
The state first began building Route 56, or the Carmel–San Simeon Highway, in 1919. A number of bridges needed to be constructed, the largest among them across Bixby Creek.
(Wikipedia)