It took the construction of 17 tunnels, ranging in length from 290 feet to half a mile, and 20 trestles to complete the most mountainous eleven-mile stretch, but the railroad was finally completed in 1919.
Maintaining the Carrizo Gorge section with its numerous tunnels and trestles was a constant challenge, especially in this earthquake-prone country. When an earthquake collapsed one of the tunnels in 1932, the engineers chose an alternate route around the ridge. But the alternate route necessitated the construction of a bridge over a steep lateral gorge known as the Goat Canyon. The wooden trestle that was constructed here, remains to this day, the longest, tallest curved wooden trestle ever built in the United States. Over 600 ft long and 180 ft high in the center, the magnificent structure is an engineering marvel that very few has seen.