2021 Map of Twitchell Dam
USGS Topo · Published 2021About this map
The Cuyama River and Sisquoc River converge to form the Santa Maria River in this modern-era study of the border between Santa Barbara and San Luis Obispo counties. The geography is dominated by the Twitchell Reservoir, which regulates the flow from the mountains to the northeast into the fertile Santa Maria Valley. The map details the transition from the steep, ridged terrain of the Sierra Madre Mountains and Los Coches Mtn down to the low-lying agricultural flats and canyons south of the riverbed.
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Map Details
Editions of this 2021 Twitchell Dam Map
This is the sole edition of this map. No revisions or reprints were ever made.
Other maps of this area
1905 · Lompoc
USGS Topo · 1:125,000
1922 · Nipomo
USGS Topo · 1:62,500
1937 · Branch Mtn
USGS Topo · 1:48,000
1942 · Lompoc
USGS Topo · 1:125,000
1942 · Santa Maria
USGS Topo · 1:62,500
1942 · Branch Mountain
USGS Topo · 1:62,500
1942 · Tepusquet Peak
USGS Topo · 1:62,500
1943 · Tepusquet Peak
USGS Topo · 1:62,500
1943 · Lompoc
USGS Topo · 1:125,000
1947 · Careaga Canyon
USGS Topo · 1:24,000