Lewis & Clark Bridge, Spanning Lewis & Clark River at Milepoint 4.78, on Warrenton Highway (Highway No. 9), Astoria, Clatsop County, OR

Significance: It is Oregon's only remaining single-leaf bascule draw span built before WWII and is an early moveable span bridge designed by state bridge engineer Conde B. McCullough. The bridge is significant for its association with McCullough as an early example of his work. McCullough is considered to be the most outstanding bridge engineer in Oregon history, serving with the Oregon State Highway Department from 1919 until his death in 1946...
Survey number: HAER OR-127
Building/structure dates: 1924 Initial Construction