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700portal, Victor Miguel Ponce, Victor Ponce, Miguel Ponce, Hydrology, San Diego State University
Portal 11:13 hr  PST  [GMT - 8]    Friday May 25, 2018  
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To refresh picture Astoria-Megler bridge over the Columbia river near its mouth, between Oregon and Washington (2004) 
Travel Photos
710.  Parana-Paraguay Waterway
720.  Ojos Negros Valley
730.  Alamar Creek
740. Tecate Creek
750.  Vitor Valley
760.  La Leche River
770.  Groundwater Sustainability
780.  Hydrology of Tierra del Sol
790.  Campo Landfill
Roman aqueduct at Segovia, Spain Portal   Civil and Environmental   Engineering   SDSU