The first white settlers arrived in the valley soon after Antoine Janis became the first white settler in northern Colorado in 1858. The farm and pasture lands were squatted upon in the two years that followed, so that most was claimed by G.R. Sanderson, one of these first settlers, who built the first irrigation ditch in the county in June 1860. The ditch was the second one constructed in northern Colorado. Sanderson sold his claim to J.H. Yeager in 1864, and the ditch came to be known as the Yeager ditch.