The Moses Lake Museum and Art Center is hosting a free screening of “Grand Coulee Dam, A Man-Made Marvel” on Wednesday, March 4. at 3 p.m. in the Civic Center Auditorium on S. Balsam St. The film is being shown in lieu of a previously scheduled program with Grand Coulee Dam Historian Shawn Lingo. Grand Coulee Dam was the key to the development of power on the Columbia River, and provides water to irrigate about 600,000 acres in the Columbia Basin Project.