This eerie view, looking toward a natural arch called the North Window, is enhanced by an unusual late spring snowfall. Here at an arid Arches National Park, Utah, precipitation is always welcome. Park plants and animals are in decline, caused by a six year drought, here in Utah as well as the whole southwest. The drought has had a big impact on Lake Powell, one of the largest man-made lakes in the United States. The lake is recharged primarily from the Colorado and Green Rivers, and has dropped 102 feet below full pool, or 43 percent below capacity. Glen Canyon Dam was dedicated on September 22, 1966 and took an additional 16 years to fill the lake.