siphons, and reservoirs were built south of Bank Lake, reaching over . Water is lifted from Lake Roosevelt to feed the massive network. The total amount of the Columbia flow that is diverted into the CBP at Grand Coulee varies a little from year to year, and is currently about 3.0 million acre-feet. This is about 3.8 percent of the Columbia's average flow as measured at the Grand Coulee dam. This amount is larger than the combined annual flows of the nearby Yakima, Wenatchee, and Okanogan rivers. There were plans to double the area of irrigated land, according to tour guides at the dam, over the next several decades. However, the Bureau of Reclamation website states that no further development is anticipated, with irrigated out of the original planned. Interest in completing the Columbia Basin Project's has grown in the late 20th and early 21st centuries. One reason for the renewed interest is the substantial depletion of the Odessa aquifer. Agricultural operations within the CBP's boundaries but outside the developed portion have for decades used groundwater pumped from the Odessa aquifer to irrigate crops. Unintended consequences Hydroelectricity was not the primary goal of the project, but during World War II the demand for electricity in the region boomed. The Hanford nuclear reservation was built just south of the project and aluminum smelting plants flocked to the Columbia Basin. A new power house was built at the Grand Coulee Dam, starting in the late sixties, that tripled the generating capacity. Part of the dam had to be blown up and re-built to make way for the new generators. Electricity is now transmitted to Canada and as far south as San Diego. There are a number of issues regarding the runoff of irrigation water. The project region receives about 6 to of annual rainfall, while the application of irrigation water amounts to an equivalent 40 to . The original plans did not sufficiently address the inevitable seepage and runoff. In some cases the results are beneficial. For example, numerous new lakes provide recreation opportunities and habitat for fish and game. In other cases agricultural chemicals in the runoff cause pollution. Environmental impact One environmental impact has been the reduction in native fish stocks above the dams. The majority of fish in the Columbia basin are migratory fish like salmon, sturgeon and steelhead. These migratory fish are often harmed or unable to pass