Construction crews are back at the location of a big rockfall along the Historic Columbia River Highway just east of Rowena Crest. They will be installing a steel screen to prevent the kind of rock slide that happened last spring, putting motorists at risk and forcing a closure of the highway. Workers from Rock Supremacy of Bend will begin the installation process Tuesday, under a $176,000 contract with the Oregon Department of Transportation to cover the problem rock face with steel mesh. Traffic will be prohibited in the area while work is underway. The crews expect to be finished by January 19.