1972 Map of Arco South

About this map

The settlement of Arco sits at the junction of rail and river in this early 1970s survey. The Union Pacific line cuts through the northeastern corner, supporting local industry and the Arco Municipal Airport. The landscape is defined by the sharp contrast between the irrigated agricultural activity near the Big Lost River and the massive fields of Lava that dominate the southern and western portions of the quadrangle. Water management is central to the area's geography, visible through features like the Ferris Slough, a Siphon, and Canal systems that divert the river's flow for local use. To the south, the terrain rises toward Sixmile Butte, while the isolated Huddles Hole Road snakes through the volcanic flats, marking one of the few ways into the barren southern reaches.