Page Base Line was used to make the triangulation computations, base lines had to be measured precisely on the ground approximately every one hundred miles. One of these important base lines, measuring 5.127 miles, was placed north of Page in 1900 in a SW to NE direction. The ends of this base line were marked with special monuments. In 2007 the monuments were recovered by a group of surveyors. The monument located here once marked the northeast endpoint of the Page Base Line, approximately six miles northeast of Page.