Aerial Photographic History
Due to the large scale of this area and its historical lack of accessibility, the area history can be revealed well with aerial photographic records. In 1989, the firm of Earth Metrics Incorporated conducted a review of historic aerial photographs dating back to 1956.(Earth Metrics, 1989) The Seaport Centre site and its environs, as of the 1956 aerial stereo photo, were essentially undeveloped, although extensive salt evaporation ponds were evident on site. Redwood City Planning Department records confirm that the site was used for salt evaporation since sometime prior to World War II.
Analysis of five sets of time staged stereo pairs of aerial photos reveal that the Seaport Centre site remained undeveloped until 1982; up until that time, city records show that the site was zoned as "Tidal Plain", a designation not allowing urban development. Area land use gradually changed from 1956 until 1982, in the form of gradual building development in the local area. As early as 1956 a rail spur is evident, which served the loading of raw sea salt for export from the area. No agricultural history is associated with the site, other than the salt harvesting.
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