sediment bypass tunnel

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    Sediment bypass tunnel outlet at Wujie DamSediment bypass tunnel outlet at Wujie Dam
    USACE staff investigate the Pfaffensprung sediment bypass tunnel in Switzerland. This critical piece of infrastructure flushes material from the dam’s pool, which can include sediment and larger matter.USACE staff investigate the Pfaffensprung sediment bypass tunnel in Switzerland. This critical piece of infrastructure flushes material from the dam’s pool, which can include sediment and larger matter.
    The Pfaffensprung sediment bypass tunnel is visible from above the dam and the outlet. This infrastructure has been in use for over 100 years and continues to provide flood protection and hydropower for the surrounding communities.The Pfaffensprung sediment bypass tunnel is visible from above the dam and the outlet. This infrastructure has been in use for over 100 years and continues to provide flood protection and hydropower for the surrounding communities.
    Wear can be seen on granite pavers in the Pfaffensprung tunnel where the movement of particles through water has caused a groove to form in the material.Wear can be seen on granite pavers in the Pfaffensprung tunnel where the movement of particles through water has caused a groove to form in the material.
    The group observes the transition between the granite and basalt at the Pfaffensprung sediment bypass tunnel.The group observes the transition between the granite and basalt at the Pfaffensprung sediment bypass tunnel.
    A Swiss engineer investigates a worn area in the Solis sediment bypass tunnel. At about 18 feet by 18 feet, this tunnel is nearly the same size as the proposed dimensions for the upcoming project at Lowell Creek in Alaska.A Swiss engineer investigates a worn area in the Solis sediment bypass tunnel. At about 18 feet by 18 feet, this tunnel is nearly the same size as the proposed dimensions for the upcoming project at Lowell Creek in Alaska.
      TypeSubtypeDateDescriptionNotesSource
      commonsimageSediment bypass tunnel outlet at Wujie Dam Commons
      commonsimageUSACE staff investigate the Pfaffensprung sediment bypass tunnel in Switzerland. This critical piece of infrastructure flushes material from the dam’s pool, which can include sediment and larger matter. Commons
      commonsimageThe Pfaffensprung sediment bypass tunnel is visible from above the dam and the outlet. This infrastructure has been in use for over 100 years and continues to provide flood protection and hydropower for the surrounding communities. Commons
      commonsimageWear can be seen on granite pavers in the Pfaffensprung tunnel where the movement of particles through water has caused a groove to form in the material. Commons
      commonsimageThe group observes the transition between the granite and basalt at the Pfaffensprung sediment bypass tunnel. Commons
      commonsimageA Swiss engineer investigates a worn area in the Solis sediment bypass tunnel. At about 18 feet by 18 feet, this tunnel is nearly the same size as the proposed dimensions for the upcoming project at Lowell Creek in Alaska. Commons
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