The Captain William Moore Bridge is an historic 300-foot (91 m) asymmetric single-pylon cable-stayed bridge on the Klondike Highway that spans the Moore Creek Gorge in the borough of Skagway, Alaska, United States, about 17 miles (27 km) north of the city of Skagway.

The bridge connects Skagway to the Yukon highway network and allows traffic to pass over the Moore Creek Gorge, which flows along a fault line.

[2][3][4] It's historic and beautiful, and is the only cantilevered cable-stayed bridge in Alaska...[5]Designed in 1974 by the engineers in the State of Alaska Department of Transportation Bridge Design Section, the cable-stayed bridge features a single H-shaped pylon anchored on the south bank, with two pairs of back stays to stabilize the forward-inclined 106-foot (32 m) tall pylon at 15 degrees from the vertical, and three pairs of forward cable stays in a fan array to support the two-lane box-girder main span deck, 270-foot (82 m) long, over the gorge.

Moreover, the unstable rock condition of the north bank could not support the standard truss or concrete slab construction bridge.

Then, borrowing techniques used to construct a dam, back filling to cover (or bury) the steel bridge, making it function as a large culvert, and finally building the road deck on the top of the roller compacted concrete fill-in.