2014 Map of Lower Monumental Dam

About this map

Lower Monumental Dam anchors this landscape where the Snake River carves through the basalt-rich plateau of southeastern Washington. The impoundment of the river creates Lake Herbert G West, a reservoir that serves as the centerpiece for local transportation and infrastructure. On the northern banks, the small settlements of Farrington and Windust are positioned near the water's edge, while the south side features the Lower Monumental State Airport and the locality of Matthew. The surrounding terrain is defined by deep incisions such as Wilson Canyon, Box Canyon, and Devils Canyon, which reveal the dramatic geology of the area. Regional connectivity is shown through the network of local routes like Lower Monumental Rd and Wallace Walker Rd, alongside specialized sites like the Hille-Kimp Airstrip near the Monument landmark.