The Gallaher House is a complex, one-and-a-half story, octagonal plan house built around 1914. Originally occupying a rural location five miles outside of Bridgeport, the house was relocated to town as a salvage effort in October 1993. Despite a recent move five miles from the original location, the house remains exceptional as an example of late Victorian, octagonal residential design. Because the house derives its significance from its rare architectural stature, its significance is not dependent upon integrity of original location. The house was standing in an advanced state of deterioration prior to the move and was prone to demolition. Owners sought to relocate the home to preserve the legacy of its distinctive eight-sided domestic architecture and the master craftsman responsible.

The Columbia River Bridge at Bridgeport was designed and built by the Seattle District, U.S. Army Corps in 1950 as part of the Chief Joseph Dam access road project. The bridge played a key role in the completion of one of the largest hydroelectric projects on the Columbia River, the Chief Joseph Dam. Construction of the dam itself would have been severely hampered without the bridge to facilitate movement of workers and supplies to the remote dam site. In addition to its association with the Chief Joseph Dam project, the heavy-duty design elements of the bridge represent successful engineering solutions to threats posed by extreme winds in the Columbia River Valley, exceptionally forceful waterfalls and volume of water, and considerable breadth presented by one of America’s greatest western rivers. The bridge was licensed by the United States to the State of Washington in 1952 for maintenance. The Columbia River Bridge at Bridgeport was the only deck truss structure of outstanding significance built in the State in the period 1941-1950. The bridge connects Douglas and Okanogan counties.

The Chief Joseph Dam Bridge is considered a significant engineering feat due to the Howe deck truss main span. This is the only Howe deck truss designed and constructed for highway use in Washington in the 1950s. During this period, the use of wood truss designs, such as the Howe, had long passed from engineering favor. Steel had replaced wood as the material used in bridge trusses. The main span of the Chief Joseph Dam Bridge is the only Howe deck truss remaining on the Washington State Bridge Inventory. (The Norman Bridge in King County, Washington, the only other wood Howe truss bridge remaining from the state’s road system. Unlike the Chief Joseph Dam Bridge however, the Norman Bridge is a through truss.) The glued laminated wood members used for the Chief Joseph Dam ‘Bridge truss diagonals are also significant as an early example of the use of this technique. The approach spans and their supports, and the entire bridge railings are of common design and were built using typical construction methods. They are not considered to be of engineering significance.