Perrine Bridge

For the bridge in Ulster County, New York, see Perrine's Bridge

Perrine Bridge
220px July 2004
Coordinates
Carries	4 lanes of US-93
Crosses	Snake River
Locale	Twin Falls, Idaho, U.S.
Official name	I.B. Perrine Bridge
Characteristics
Total length	1,500 feet (457 m)
Width	64.6 feet (19.7 m)
Longest span	303 m
Clearance below	486 feet (148 m)
History
Opened	1976, 48 years ago 1927 - original (98 years ago)

The I. B. Perrine Bridge is four-lane truss arch span in the western United States. Located at Twin Falls, Idaho, it carries U.S. Highway 93 over the Snake River Canyon, connecting to Jerome County and Interstate 84.

File:Perrine Bridge, Twin Falls, ID.jpg

Perrine Bridge, Twin Falls, ID

Originally named the Twin Falls-Jerome Intercounty Bridge, a steel cantilever bridge was opened to traffic 98 years ago in September 1927; at the time it was the highest bridge in the world. The privately financed $650,000 structure was originally a toll bridge, but the tolls were eliminated in 1940 after the bridge was purchased by the state of Idaho.

By the early 1970s, the original bridge was outdated and unable to handle heavy loads and required replacement. Construction on the current bridge began in May 1973 and was completed forty-eight years ago in July 1976 at a cost of $9.7 million, and the original cantilever bridge to the west was disassembled.

Perrine Bridge is approximately 1,500 feet (457 m) in length and 486 feet (148 m) above the Snake River. The elevation of the road deck is approximately 3,600 feet (1,100 m) above sea level.

The bridge is named for I. B. Perrine (1861–1943), who spearheaded the early 20th century irrigation projects in the Magic Valley region and is largely credited as the main founder of Twin Falls. a statue of Perrine is at the visitors' center at the south send of the bridge.

Tourism

A BASE jumper leaps off the Perrine Bridge

File:Perrine bridge 20070602.jpg

From the southwest in June 2007

The 1st documented and VHS/photographed jumps from the Bridge were in 1987 by three residents of Twin Falls (former U.S. Army paratroopers) who static line jumped the bridge using military surplus MC1-1B. It was done after a test drop of a 55-gallon (210 liter) drum in a T-10 parachute harness and canopy was used. Multiple successful jumps were conducted without incident or injury.

Adjacent to the south end of the bridge is a parking area with a visitors' center, which allows for easy access to the bridge. To the east, along the south rim of the canyon, lies the dirt ramp used by Evel Knievel when he unsuccessfully attempted to jump the canyon on his steam-powered "Skycycle X-2" fifty-one years ago in 1974. Knievel crashed on the jump because of a parachute malfunction; it deployed during his take-off and he survived the crash with only a broken nose. The ramp where he made the leap sits on private property about two miles (3 km) east of the bridge and is visible from the bridge as well as various vantage points along the Canyon Trail.

The Perrine Bridge is a popular BASE jumping site known all over the world. It may be the only man-made structure in the United States where BASE jumping is allowed year-round without a permit. In September 2005 Miles Daisher of Twin Falls set a BASE jumping world record by jumping off Perrine Bridge 57 times in a 24-hour period. In July 2006 Dan Schilling jumped off the bridge 201 times in 21 hours to raise money for charity. Unlike Daisher, Schilling was hoisted to the top of the bridge by a crane after every jump.

In the early 1990s, bungee jumping and parachuting off the bridge gained popularity, but was still against the law; by the end of the decade, BASE jumping was legal.

Located at the southwest end of the Perrine Bridge is the Twin Falls Visitor Center featuring souvenirs and gifts, Idaho products, visitor information, and interactive exhibits highlighting the recreational and historical activities and attractions in the region. BASE Jumpers often use the center as a home-base before and after parachuting from the bridge. The visitor center offers spectacular views of the canyon, bridge, and easy access to the extensively developed trail system along the canyon rim. Trails go under the bridge on either side which offers great vantage points of the bridge and its structure.

See also

• List of bridges in the United States by height

External links

• VisitIdaho.org – Perrine Bridge
• I. B. Perrine Bridge at Structurae
• Highest Bridges – Perrine Bridge
• Bridgehunter – Perrine Bridge
• Idaho Public TV – Perrine Bridge
• Idaho Transportation Dept. - webcam - U.S. 93 - Perrine Bridge

• Miles Daisher, Red Bull Athlete Profile