1936 Dredge Mallard II : 無料・フリー素材/写真
1936 Dredge Mallard II / Elaine with Grey Cats
| ライセンス | クリエイティブ・コモンズ 表示-継承 2.1 |
|---|---|
| 説明 | "The Mallard II has plied San Francisco Bay's salt ponds since her keel was laid in 1936. The crew of the Mallard II works year-round, maintaining about 10 miles of our 80 miles of levees per year. The one notable exception: when the Mallard II heeded the nation's call during World War II, retrieving artillery shells from the Bay floor around Mare Island and Port Chicago.Anchored on her spuds, or stabilizing legs, the dredge scoops mud in her clam-shell bucket from borrow ditches within the salt ponds, and places it atop the levees. The Mallard II not only preserves the levees, which are subject to wind and wave erosion, but helps maintain a network of gates, pumps and siphons that move brines through the system of evaporation ponds" -- www.cargill.com/corporate-responsibility/environmental-su... "Like an overgrown kid in a muddy sandbox, the dredger has one function in life: to move earth from place to place. Built in 1936, the Mallard, as the machine is dubbed, is one of the last of its kind. They simply don't make wooden-hulled clamshell gravity-swing dredgers anymore, said Butch Parades of Cargill. " -- www.southbayrestoration.org/news/articles/article5.html |
| 撮影日 | 2012-05-10 14:36:27 |
| 撮影者 | Elaine with Grey Cats , California, USA |
| タグ | |
| 撮影地 | East Palo Alto, California, United States 地図 |
| カメラ | SLT-A55V , SONY |
| 露出 | 0.004 sec (1/250) |
| 開放F値 | f/13.0 |
| 焦点距離 | 35 mm |