HALE BOGGS MEMORIAL BRIDGE

HALE BOGGS MEMORIAL BRIDGE


The Hale Boggs Memorial Bridge, which crosses the Mississippi River at Luling in St. Charles Parish, Louisiana, opened in 1983 as part of I-310 and was the first major cable-stayed bridge built in the United States.

The main structure is 2,745 ft (837 m) long with a main span of 1,222 ft (372 m) providing a navigation channel of 1,187 ft x 133 ft (362 m x 41 m). The bridge deck is 82 ft (25 m) wide and carries four lanes of traffic with a full shoulder on each side. During several inspections, corrosion was discovered in the original stay cable system composed of parallel ¼" wires (up to 307 wires per cable).

SYSTRA IBT developed a cable replacement strategy that minimizes impact to traffic and modifications to the existing structure. The stays have been replaced with a modern parallel strand system with superior durability and maintenance characteristics. A system of temporary cables and saddles on top of the pylons enable the bridge to remain in service throughout the stay replacement procedure without the need for load restrictions.

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