Exterior aerial view of the Permanente Cement Company, ca.1940

Photograph of exterior aerial view of the Permanente Cement Company, ca.1940. At center, the large factory can be seen sitting among the surrounding mountain ranges. Several pipes lie near the center of the factory by the adjacent buildings. A small square building lined with windows is visible at the north end of the factory, and a tall smokestack can be seen adjacent to this building. On the left side of the factory, two large circular tanks can be seen embedded into the ground. Two small buildings lie at the edge of the tanks, and a group of cylindrical tanks can also be seen nearby. Across the ravine further in the foreground, a larger group of cylindrical tanks can be seen adjacent to a rectangular building. In the extreme foreground to the left, a large building is seen extending small platforms to the nearby mountain ridge. Small structures can be seen along the edge of this forested mountain ridge. In the extreme background, a winding road surrounds the outer perimeter of the factory. Numerous hills and curved roads can be seen on both the left and the right.; Back of photoprint reads: "Permanente Cement Company , already the largest cement plant in the world, has been expanded to boost production to 5,500,000 barrels or 22,000,000 sacks annually. Built in less than seven months in 1939 to supply all the cement for mighty Shasta Dam, the Henry J. Kaiser-directed enterprise provided the Pacific war theater with all its bulk cement during world war II. The plant is located in Northern California's Santa Clara Valley where hight quality raw materials, limestone and clay, are located on its property. Novel in operation of the plant is the 48-inch conveyor belt which moves rock downhill at the rate of which there are more than four miles in the plant, generators driven by gravity flow supply enough electricity to operate a five-yard shovel in the quarry. Branch facilities of the cement plant include bulk ship loading equipment located at Redwood City on San Francisco Bay; packhouse and silo storage equipment at Honolulu, T.H. and another manufacturing division at Seattle, Washington".本照片为约1940年的Permanente水泥公司（Permanente Cement Company）外部航拍影像。画面中央可见坐落于群山环抱中的大型厂区，厂区中心毗邻建筑旁设有多根管道。厂区北端可见一栋带有多排窗户的小型方形建筑，该建筑旁矗立着一座高耸的烟囱。厂区左侧可见两座嵌入地下的大型圆形储槽，储槽边缘设有两座小型建筑，附近还分布有一组圆柱形储槽。前景更远处的沟壑对岸，可见一组规模更大的圆柱形储槽，其毗邻一栋矩形建筑。最左侧的近景区域，可见一栋大型建筑向附近山脊延伸出小型平台；这片林木覆盖的山脊沿线分布有小型构筑物。远景最深处，一条蜿蜒道路环绕着厂区外围，画面左右两侧可见多处丘陵与蜿蜒道路。照片背面文字如下：Permanente水泥公司（Permanente Cement Company）已是全球规模最大的水泥厂，此次扩建后其年产能将提升至550万桶或2200万袋水泥。该厂区于1939年耗时不足七个月建成，最初为满足宏伟的沙斯塔大坝（Shasta Dam）的全部水泥需求而修建；在亨利·J·凯泽的主导下，这家企业在第二次世界大战期间为太平洋战区供应了所有散装水泥。该厂区坐落于加利福尼亚州北部的圣克拉拉谷（Santa Clara Valley），厂区内蕴藏着优质的石灰岩与黏土等原材料。该厂区的运营颇具特色：一条总长超过4英里的48英寸传送带负责将石料向下输送，依靠重力流驱动的发电机可为采石场内的5立方码铲运机提供足够电力。该水泥厂的分支机构包括：位于旧金山湾雷德伍德城（Redwood City）的散装船舶装载设施；位于檀香山（Honolulu, T.H.，夏威夷领地）的包装仓库与筒仓存储设施，以及位于华盛顿州西雅图的另一处生产分厂。