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Display: 20

    • Grand Coulee Dam

    • Grand Coulee Dam

    • Grand Coulee Dam (Wash.);Hydroelectric power plants -- Washington (State);Dams -- United States -- Design and construction.

    • Construction site at Grand Coulee Dam.
    • Hubert Blonk
    • Hard Hat

    • Hard Hat

    • Dams -- United States -- Design and construction; Construction workers -- United States.

    • Hard hat worn by construction workers on Grand Coulee Dam. Early version of hard hat was plastic resin impregnated fabric. This one was worn by project engineer Frank Banks.
    • Hubert Blonk
    • Grand Coulee Dam Construction

    • Grand Coulee Dam Construction

    • Grand Coulee Dam (Wash.);Hydroelectric power plants -- Washington (State);Dams -- United States -- Design and construction.

    • Work on the base of the dam at its western end, showing steel trestles for travelling cranes, and western concrete mixing plant.
    • Hubert Blonk
    • Grand Coulee Dam

    • Grand Coulee Dam

    • Grand Coulee Dam (Wash.);Hydroelectric power plants -- Washington (State);Dams -- United States -- Design and construction.

    • View of dam with third power house under construction.
    • Hubert Blonk
    • Pouring Concrete

    • Pouring Concrete

    • Grand Coulee Dam (Wash.);Hydroelectric power plants -- Washington (State);Dams -- United States -- Design and construction.

    • Three men empty a four cubic yard bucket of concrete during the construction of Grand Coulee Dam.
    • Hubert Blonk
    • Grand Coulee Dam Construction

    • Grand Coulee Dam Construction

    • Grand Coulee Dam (Wash.);Hydroelectric power plants -- Washington (State);Dams -- United States -- Design and construction.

    • Shows construction method for the lower portion of the dam. Alternating blocks were constructed. The Columbia River was forced through slots by placement of temporary gates on the upstream side of the dam.
    • Hubert Blonk
    • Spillway, Grand Coulee Dam

    • Spillway, Grand Coulee Dam

    • Spillways -- Design and construction; Grand Coulee Dam (Wash.);Hydroelectric power plants -- Washington (State);Dams -- United States -- Design and construction.

    • The bottom of the spillway, nearing completion.
    • Hubert Blonk
    • Trash Racks

    • Trash Racks

    • TRASH RACKS (HYDRAULIC STRUCTURES); Grand Coulee Dam (Wash.);Hydroelectric power plants -- Washington (State);Dams -- United States -- Design and construction.

    • Trash Racks on the upstream side of Grand Coulee Dam. The trash racks were to keep floating debris from entering the penstocks and damaging the turbines.
    • Hubert Blonk
    • Temporary Gate for Grand Coulee Dam

    • Temporary Gate for Grand Coulee Dam

    • Grand Coulee Dam (Wash.);Hydroelectric power plants -- Washington (State);Dams -- United States -- Design and construction.

    • A temporary floodgate used to close off a slot in the dam is being barged into position.
    • Hubert Blonk
    • Grand Coulee Dam

    • Grand Coulee Dam

    • Grand Coulee Dam (Wash.);Hydroelectric power plants -- Washington (State);Dams -- United States -- Design and construction.

    • The foundation level of concrete had been poured.
    • Hubert Blonk
    • Grand Coulee Dam

    • Grand Coulee Dam

    • Grand Coulee Dam (Wash.);Hydroelectric power plants -- Washington (State);Dams -- United States -- Design and construction.

    • An idea of the size of the structure is provided by comparing the workman and the completed portion of the dam behind him.
    • Hubert Blonk
    • Grand Coulee Dam Site

    • Grand Coulee Dam Site

    • Columbia River -- History; Grand Coulee Dam (Wash.);Hydroelectric power plants -- Washington (State);Dams -- United States -- Design and construction.

    • Early work under way on both banks of the Columbia.
    • Hubert Blonk
    • Grand Coulee Dam Construction

    • Grand Coulee Dam Construction

    • Grand Coulee Dam (Wash.);Hydroelectric power plants -- Washington (State);Dams -- United States -- Design and construction.

    • Excavation of soil and loose rock, and work on the coffer dam were under way on the east end of the dam.
    • Hubert Blonk
    • Grand Coulee Dam Construction

    • Grand Coulee Dam Construction

    • Columbia River -- History; Grand Coulee Dam (Wash.);Hydroelectric power plants -- Washington (State);Dams -- United States -- Design and construction.

    • The Columbia River flowed through slots in the dam, as other sections were poured.
    • Hubert Blonk
    • Pumping Station Excavation

    • Pumping Station Excavation

    • Grand Coulee Dam (Wash.);Hydroelectric power plants -- Washington (State);Dams -- United States -- Design and construction.

    • Excavation for pumping station to pump water from Lake Roosevelt into the Grand Coulee.
    • Hubert Blonk
    • Pumping Station Excavation

    • Pumping Station Excavation

    • Grand Coulee Dam (Wash.);Hydroelectric power plants -- Washington (State);Dams -- United States -- Design and construction.

    • Preparation for constructing the pumping station to bring water from Lake Roosevelt into the Grand Coulee itself. Boring the tunnels for the pumping plant.
    • Hubert Blonk
    • Spillway and Powerhouse

    • Spillway and Powerhouse

    • Grand Coulee Dam (Wash.);Hydroelectric power plants -- Washington (State);Dams -- United States -- Design and construction; Spillways -- Design and construction.

    • Grand Coulee Dam spillway and power house under construction, looking west.
    • Hubert Blonk
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