The property (increased to ), stayed with the family (despite Archibald Stewart's murder in July 1884) until it was purchased in 1902 by the San Pedro, Los Angeles, and Salt Lake Railroad, then being built across southern Nevada. The railroad was a project of Montana Senator William Andrews Clark. Clark enlisted Utah's U.S. Senator and mining magnate Thomas Kearns to ensure the line's completion through Utah to Las Vegas. The State Land Act of 1885 offered land at $1.25 per acre ($3.09/hectare). Clark and Kearns promoted the area to American farmers who quickly expanded the farming plots of the areas. Not until 1895 did the first large-scale migration of Mormons begin in the area, at long last fulfilling Brigham Young's early dream. Through wells and arid irrigation, agriculture became the primary industry for the next 20 years and in return for his development, the farmers named the area Clark County in honor of the railroad tycoon and Senator.