Willamette Willamette Basin Visualization Metro Planning worked with the U.S. Army Corps of Engineers on this project. The goal here was to illustrate a lot of information quickly, simply, and concisely. Polygonal count was kept low and textures to a minimum to highlight only the desired elements of interest while retaining accurate data. ©  METRO PLANNING, INC. 2011 Willamette Valley Dams:  System History and Mission Willamette Valley Dams:  Managing Risks & Making Repairs