{"product_id":"postcard-california-san-mateo-ca-crystal-springs-dam-hand-color-1910s-unposted","title":"San Mateo California Crystal Springs Dam 1910s Postcard Unposted","description":"\u003cp data-start=\"246\" data-end=\"416\"\u003eThis postcard dates to the 1910s and depicts Crystal Springs Dam in San Mateo County, California, described in the printed caption as the largest cement dam in the world.\u003c\/p\u003e\n\u003cp data-start=\"418\" data-end=\"924\"\u003eConstructed in the late nineteenth century and expanded in the early twentieth century, Crystal Springs Dam formed part of the San Francisco Peninsula’s critical water supply infrastructure. Large-scale cement dam projects of this era represented significant engineering achievements, reshaping regional landscapes and supporting urban growth. Promotional postcards of dams and reservoirs often emphasized scale and surrounding topography to highlight both technological accomplishment and natural setting.\u003c\/p\u003e\n\u003cp data-start=\"926\" data-end=\"1318\"\u003eThe image presents a broad hillside view of the reservoir and dam structure set within rolling terrain, with a winding road descending toward clustered utility buildings below. The water surface and slopes are enhanced with hand-applied color, accentuating contrasts between green vegetation, tan hillsides, and blue reservoir. The reverse shows a divided back format with no postal markings.\u003c\/p\u003e\n\u003cp data-start=\"1320\" data-end=\"1609\"\u003eThe item shown in the listing is the exact item the collector will receive. We have tens of thousands of items to choose from. Shipping will always be combined (or refunded) to save you as much money as possible. Please contact us with any questions, or visit our store page for specifics.\u003c\/p\u003e","brand":"Everything Ephemera","offers":[{"title":"Default Title","offer_id":52864131629240,"sku":"20240818v","price":32.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0939\/8740\/6008\/files\/57_7abb2723-f669-4b37-ba05-d099f7fd1ae2.jpg?v=1771475315","url":"https:\/\/everythingephemera.com\/products\/postcard-california-san-mateo-ca-crystal-springs-dam-hand-color-1910s-unposted","provider":"Everything Ephemera","version":"1.0","type":"link"}