LOWER SNAKE RIVER, Wash. – If your upcoming Memorial Day weekend plans include a road trip to visit family and friends on the opposite side of the lower Snake River, you may want to keep in mind that most U.S. Army Corps of Engineers dams are closed to cross-dam public vehicle traffic on federal holidays, unless otherwise announced. Lower Granite Lock and Dam, on the Snake River near Pomeroy, Washington, will be open for public vehicle crossings on Memorial Day. Walla Walla District operations officials want to remind the public of the holiday closure affecting two of three dams on the Snake River in Washington that normally allow public vehicle crossings – Little Goose, near Starbuck, and Lower Monumental, near Kahlotus.