; and (B) the erosion of the New River channel, which formed the deep river canyon between 1905 and 1907; (2) the New River— (A) starts in Mexicali, Mexico; (B) flows north into the United States through Calexico; (C) passes through the Imperial Valley; and (D) drains into the Salton Sea approximately 66 miles north of the international boundary; (3) the sub-watershed of the New River covers approximately 750 square miles, of which 63 percent is in Mexico and 37 percent is in the United States; (4) the New River has been widely recognized for significant water pollution problems, primarily because of agricultural runoff, raw sewage, pesticides, and discharges of wastes from domestic, agricultural, and industrial sources in Mexico and the Imperial Valley; (5) by the 1980s, the New River acquired the reputation of being 1 of the most polluted rivers in the United States, with many pollutants in the New River posing serious human health hazards to local populations, particularly in Calexico and Mexicali; (6) in 1992, Minute 288 of the International Boundary and Water Commission— (A) established a sanitation strategy for the water quality problems of the New River at the international border; and (B) divided sanitation projects into 2 immediate repair projects, the Mexicali I and Mexicali II, that— (i) totaled approximately $50,000,000; and (ii) were funded by both the United States and Mexico through the North American Development Bank; (7) in 1995, the Environmental Protection Agency provided funds to the California Regional Water Quality Control Board to monitor and document the water quality at the international boundary on a monthly basis; (8) in the late 1990s— (A) the United States and Mexico spent $100,000,000 (of which 45 percent was paid by Mexico and 55 percent was paid by the United States) to build the Las Arenitas and Zaragoza wastewater treatment plants