The railways would not build across the western frontier without settlement as it would be too costly to provide train service across a barren wilderness. The Clifford Sifton immigration policy encourages settlers to arrive. Western settlement began and immigration encroached across the Manitoba and United States borders into the North West Territories which later became Saskatchewan. Immigration settlement to the last best west and the early highways began in the south east. The Federal Government survey crew reached this south eastern area of the District of Assiniboia, North West Territories in 1880. In 1881, the province of Manitoba expanded to its present boundaries and land could be purchased for $10.00 an acre. President Lincoln's U.S. Homestead Act was passed in 1862 and lands there were taken. In 1872, Canada passed the Dominion Lands Act attracting homesteaders to the West.