I took my Mom to see this bridge in early May. I know there was a cache for it at one time, but not today. I had my cache containers ready, so why now put the cache in a place where you can learn more about the bridge.
Here is information from the Marion County Website:
Marion County built the Gallon House Covered Bridge over Abiqua Creek in rural Marion County in 1916 for $1,310. The name Gallon House was due to the bridge's use as a "liquor drop" by bootleggers. The State of Oregon became a "dry state" in 1916 when Governor West signed into law a prohibition on the sale of alcohol. At the time, Silverton was "dry" and had a municipal code that prohibited liquor from being sold in town. At the same time, Mt. Angel was "wet," and residents got around the law by "giving" each other alcohol, hiding the money that made it a sale rather than a gift. Operators at a liquor dispensary nearby sold "white lightening" whiskey by the gallon to Silverton residents from a little shack – a "gallon house" - located on the Mt. Angel side of the bridge.
During the Christmas Flood of 1964, the bridge was swept off its footing and suffered considerable damage. Since it was the county's only covered bridge, the Marion County Board of Commissioners decided it should be repaired and maintained as a historical landmark.
In 1985, the bridge was closed to all traffic when a damaged chord rendered it useless. County road crews repaired the bridge to accept traffic up to a 10-ton limit by reinforcing a lower chord and making repairs to the beams and flooring. Also included in the renovation was a change in the size and shape of the portals. The revamped portals were hinged to allow them to be opened for taller loads when necessary. In 1990, the bridge was rehabilitated to mint condition because of poor structural conditions, and the hinged portals were removed.
The Gallon House Bridge is on the U.S. National Register of Historic Places, the World Guide to Covered Bridges, and listed in the Library of Congress National Covered Bridges Recording Project.