To improve safety on what was then Highway 10, the State Department of Highways planned for two snowsheds to be built over sections of the westbound lanes, totaling 1,800 feet. Bids for construction were called in February of 1950, and were awarded to C.V. Wilder Co. and Gaasland Co. Inc., both of Bellingham, WA. Construction began in the fall and progressed quickly due to the use of precast construction. The project was scheduled to be finished by November 1, 1950 at a total cost of $1,120,000.
The snowshed pictured on the postcard above was the larger of the two. Located at Airplane Curve, about a mile west of the Summit, it spanned 1,300 feet, was 15 feet high, and had a pavement width of 24 feet. It was demolished sometime in the early 1980s, but the concrete retaining wall remains.
The smaller snowshed at Lake Keechelus, only 500 feet long, was placed on the National Register of Historic Places in 1995. After 64 years of service, it was dismantled and recycled as part of the I-90 Snoqualmie Pass East Project. A time-lapse of the removal can be seen here.