"The National Irrigation Congress was held periodically in the Western United States beginning in 1891 and ending in 1916, by which time the organization had changed its name to International Irrigation Congress. It was a \"powerful pressure group.\""@en . . . . . "1117742205"^^ . . . . . . . . . . . . . . . . . . . . . . "32070"^^ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . "The National Irrigation Congress was held periodically in the Western United States beginning in 1891 and ending in 1916, by which time the organization had changed its name to International Irrigation Congress. It was a \"powerful pressure group.\""@en . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . "National Irrigation Congress"@en . . . . . . . . . . . . . . . . . . "30106399"^^ . . . . . .