Diana Namara, maintenance management specialist with the Operations Division, U.S. Army Corps of Engineers Los Angeles District, documents the remains of a campsite within the San Gabriel River barricaded with Arundo Donax, an invasive grass resembling bamboo, Feb. 22 near Azusa, California. The weeklong cleanup project by the Corps’ LA District removed 128 tons of debris along a 60-acre area. (Photo by John Reese, U.S. Army Corps of Engineers Los Angeles District)