In 1857 Surveyor J. E. Weysse and astronomer Hugh Campbell completed the survey of the southern Kansas border— but it ran all the way to 103˚ West Longitude, the New Mexico territorial border. The Colorado-Kansas border wasn’t established until Kansas became a state in 1861. Kansans rejected the idea of “Big Kansas” that including the mining regions of the Front Range and pulled their western border back to 102˚ W Longitude. So the 53 mile gap between 102˚ and 103˚ eventually became the border between Oklahoma and Colorado.