Imperial Valley agricultural patterns dominate this landscape, defined by an intricate network of irrigation infrastructure designed to sustain the desert floor. The transition from the cultivated fields of the valley into the arid East Mesa is clearly marked by the Coachella Canal and the East Highline Canal. This 2015 survey reveals the systematic organization of the region through a dense grid of laterals and drains, such as L Lateral and Q Drain, which feed the various land tracts. Notable infrastructure like Siphon Seven and Siphon Five highlight the engineering required to move water across varying elevations. The settlement of Iris and the eastern edge of Calipatria serve as local hubs, connected by a network of rural routes including Wiest Rd and Flowing Wells Rd that traverse the township boundaries of t11s r14e and t12s r15e.
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1940 · Iris
USGS Topo · 1:62,500
1940 · Frink
USGS Topo · 1:62,500
1940 · Iris Pass
USGS Topo · 1:62,500
1944 · Calipatria
USGS Topo · 1:62,500
1944 · Frink
USGS Topo · 1:62,500
1945 · Iris Pass
USGS Topo · 1:62,500
1945 · Iris
USGS Topo · 1:62,500
1954 · Salton Sea
USGS Topo · 1:250,000
1955 · Tortuga
USGS Topo · 1:24,000
1955 · Salton Sea
USGS Topo · 1:250,000