The first was built in 1927 as part of the Sunset Highway (later US 10), a precursor to I-90. In 1962 the second bridge was built because the reservoir pool backing up behind the new Wanapum Dam would soon overwhelm the old bridge; it was dedicated by the state on November 9, 1962.
The first structure was erected in 1927 as part of the Sunset Highway (later US 10), a precursor to I-90. A second bridge was constructed in 1962 because the reservoir behind the Wanapum Dam would soon engulf the old one; it was officially inaugurated by the state on November 9, 1962.