The Lower Elk Watershed (HUC 06030004) covers an area of approximately 1,310 square miles in eastern Oregon. The hydrology of the watershed is dominated by the Grande Ronde River, which is a major tributary of the Snake River. The area receives an average of 30 inches of precipitation per year, with most of it falling as snow during the winter months. The snowpack is an important component of the watershed's hydrology, as it provides a significant portion of the surface water during the spring and summer months. Surface water in the watershed is primarily used for irrigation, but there are also several small reservoirs that provide water for domestic use. The water quality in the reservoirs is generally good, with low levels of pollutants and nutrients. Interesting climatic facts and trends include the fact that the area experiences frequent and severe winter storms, which can cause significant flooding and damage to infrastructure. Additionally, there has been a trend of decreasing snowpack in recent years, which could have significant impacts on the watershed's hydrology and ecology.