WALLA WALLA, Wash. – Lower Granite Lock and Dam, near Pomeroy, Wash., 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 in Washington that normally allow public vehicle crossings – Little Goose, near Starbuck, Wash.; and Lower Monumental, near Kahlotus, Wash.