Loading map...

1942 Map of MOON MTN

Name: 1942 Topographic Map of MOON MTN
Creator: U.S. Geological Survey
Published: 1943
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 1943

About this map

The Colorado River Indian Reservation dominates the landscape of the Colorado River valley during the early 1940s, a period marked by significant wartime activity. This Army Corps of Engineers survey reveals the presence of several detention facilities, including Parker Alien Reception Center Unit No. 1, Unit No. 2, and Unit No. 3, situated on the western side of the reservation.

To the east, the terrain rises sharply into the Dome Rock Mountains and Moon Mtn, where the map identifies former industrial sites like the Valenzuella Mines (Abandoned) and Mammoth Mine (Abandoned). The settlement of Tyson sits near the drainage of Tyson Wash, while the La Posa Plain stretches toward the eastern horizon. The map also delineates the border between California and Arizona, following the course of the Colorado River and the boundary between Riverside and Yuma counties.