1997 Map of Imperial Reservoir

About this map

The Imperial Reservoir and the Imperial Dam Spillway 181 anchor this landscape along the border of California and Arizona. The map illustrates a complex water management system where the Colorado River feeds the Gila Main Canal and the Desilting Basin, critical for the region's agricultural and civil development. While much of the riverbank is preserved within the Imperial National Wildlife Refuge, evidence of historical human activity remains visible through the Old Senator Mine and the Castle Dome Landing (Site). The eastern portion of the quadrangle is dominated by the Yuma Test Station and its Military Reservation Boundary, showing a sharp contrast between the managed waterways and the arid desert terrain of the Chocolate Mountains. Local points of interest include Fishers Landing and Martinez Lake, centers for river-based recreation and settlement.