The I. B. Perrine Bridge is a 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. The Perrine Bridge is approximately in total length, with a main span of and a deck height of above the Snake River it is the eighth highest bridge in the United States. The elevation above sea level for the bridge deck is approximately . 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 end of the bridge. History Originally named the Twin Falls-Jerome Intercounty Bridge, a steel cantilever bridge was opened to traffic in September 1927, and formally dedicated by governor H. C. Baldridge on October 1, 1927. The privately financed $750,000 structure (equivalent to $ million in dollars) was originally a toll bridge; the tolls were eliminated in April 1940 after the bridge was purchased by the state of Idaho for $482,000 (equivalent to $ million in dollars). By the early 1970s, the original bridge was outdated and unable to handle heavy loads and required replacement. Construction of the current bridge began in May 1973 and was completed in July 1976 at a cost of $10.56 million (equivalent to $ million in dollars). The new bridge was dedicated on July 31, 1976; the original cantilever bridge to the west was later disassembled. Tourism 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. The visitor center has views of the canyon, bridge, and access to the trail system along the canyon rim. Trails go under the bridge on either side which offers vantage points of the bridge and its structure. To the east, along the south rim of the canyon, lies the dirt ramp used by Evel Knievel when he unsuccessfully attempted his Snake River Canyon jump on the Skycycle X-2 in September 1974; the jump failed because of a parachute malfunction. The ramp where he made the leap sits on private property about east of the bridge