Spillway and spillway gates, Dam 1, Bull Run Watershed, Oregon
Dam 1, a curved concrete gravity dam, constructed 1925-1929, in the 102-square-mile Bull Run watershed near Mount Hood, has a maximum reservoir capacity of 10 billion gallons, making it the primary contributor to the Portland Water System Distribution Area. The spillway gates visible in this photo, added to the dam in 1955, increased the reservoir capacity from the original billion gallons to 10 billion gallons. This is the origin of Portland's drinking water, which flows by gravity to the Mount Tabor reservoirs before entering the City's water distribution network.
Size: 5100px × 3394px
Location: Bull Run Watershed, Portland, Oregon, USA
Photo credit: © Andrew Haliburton / Alamy / Afripics
License: Licensed
Model Released: No
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