
Skinner Reservoir dominates the central landscape of this 1973 revision, marking a significant period of water infrastructure development in Riverside County. The San Diego Aqueduct cuts across the western terrain, underscoring the region's reliance on managed water systems to support its growing agricultural and residential needs. While the reservoir represents modern engineering, older markers of the rural community remain, such as the Alamos Sch and the Hyatt Sch (Aban'd), reflecting the shifting population centers of the mid-20th century.
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This is the sole edition of this map. No revisions or reprints were ever made.
1901 · Southern California Sheet No. 1
USGS Topo · 1:250,000
1901 · San Jacinto
USGS Topo · 1:125,000
1901 · Elsinore
USGS Topo · 1:125,000
1901 · San Luis Rey
USGS Topo · 1:125,000
1903 · Ramona
USGS Topo · 1:125,000
1904 · Southern California Sheet No. 2
USGS Topo · 1:250,000
1904 · Southern California Sheet No. 1
USGS Topo · 1:250,000
1939 · Palomar Mountain
USGS Topo · 1:62,500
1942 · Temecula
USGS Topo · 1:62,500
1942 · Hemet
USGS Topo · 1:62,500