1973 Map of Shamrock

About this map

Shamrock sits near the base of this landscape in the southern portion of Adams County, where the topography is defined by the winding drainages of San Arroyo Creek and its tributary, West Fork San Arroyo Creek. The survey, conducted in the early 1970s, illustrates a transition toward industrial land use in a region historically dominated by ranching. Evidence of energy development is visible throughout the quadrangle, marked by several Oil Wells, a solitary Oil Well, and a prominent north-south Pipeline cutting through the eastern sections. Water management in this arid environment is highlighted by Simpsons Reservoir and the presence of scattered wells and drill holes. The map also records smaller seasonal waterways like Hoffman Creek, tracing the natural runoff patterns across the undulating plains of eastern Colorado.