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Project Name: 475-493 St. John St. HRE Pleasanton <br /> Historic Resources Evaluation - DRAFT <br /> Project No: HP0932.2101.00 <br /> February 25, 2021 <br /> <br /> treanorhl.com 14 <br /> <br />Figure 25. 1943 Sanborn map, the subject parcels outlined by the dashed red line (Library of Congress). <br /> <br /> <br />Figure 26. 1953 Sanborn map, the subject parcels outlined by the dashed red line (The EDR Aerial Photo Package). <br /> <br />7. HISTORIC CONTEXT13 <br />Located in eastern Alameda County, Pleasanton is bounded by the Diablo Range foothills on the north and <br />south, the coastal Pleasanton Ridge on the west, and the adjacent Livermore Valley on the east. Major water <br />courses include the Arroyo del Valle and Arroyo de la Laguna. The earliest European presence in the vicinity of <br />Pleasanton occurred in 1797. In the early 19th century, the Mexican government granted most of the vicinity of <br />Pleasanton, including the future town site, to members of the Bernal family; the area was inhabited primarily by <br />cattle ranch workers, seasonal hunters, and trappers. With American annexation of California and the Gold Rush <br /> <br />13 Unless noted, largely summarized from Pleasanton Downtown Historic Context Statement, 9-13 and 83.