Louisville and Lafayette anchor a landscape defined by an extensive network of irrigation ditches and reservoirs, a hallmark of the agricultural and industrial water management history in this region. Water bodies like Marshall Lake, the Great Western Reservoir, and Base Line Reservoir are connected by historically significant diversions such as the Community Ditch, Goodhue Ditch, and Davidson Ditch. These waterways supported the development of communities like Superior and the northern reaches of Westminster, which sit on the edge of the Rocky Flats plateau.
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1899 · West Denver
USGS Topo · 1:125,000
1902 · Boulder
USGS Topo · 1:62,500
1904 · Niwot
USGS Topo · 1:62,500
1904 · Boulder
USGS Topo · 1:62,500
1906 · Blackhawk
USGS Topo · 1:62,500
1939 · Golden
USGS Topo · 1:24,000
1940 · Lafayette
USGS Topo · 1:31,680
1941 · Arvada
USGS Topo · 1:31,680
1942 · Eldorado Springs
USGS Topo · 1:24,000
1942 · Golden
USGS Topo · 1:31,680