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    The cut at Bas Obispo during flood of Nov. 12, 1909

    Looking south.

    Handy (Photographer), Hallen (Photographer), Special Collections/University Archives (Publisher)

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    Wrecking cranes freeing steam shovel No. 231 from Cucaracha slide, Oct. 4, 1909

    Handy (Photographer), Hallen (Photographer), Special Collections/University Archives (Publisher)

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    Gatun Spillway looking north, April, 1910

    Handy (Photographer), Hallen (Photographer), Special Collections/University Archives (Publisher)

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    Culebra cut

    Steam shovels at work on slide.

    Handy (Photographer), Hallen (Photographer), Special Collections/University Archives (Publisher)

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    Berm crane at Pedro Miguel Lock, June, 1910

    Handy (Photographer), Hallen (Photographer), Special Collections/University Archives (Publisher)

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    Gatun Dam, hydraulic fill, July, 1910

    Handy (Photographer), Hallen (Photographer), Special Collections/University Archives (Publisher)

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    Pedro Miguel Locks.April 6, 1910

    Looking north from west bank. April 6, 1910.

    Handy (Photographer), Hallen (Photographer), Special Collections/University Archives (Publisher)

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    Gatun upper locks and forebay, looking north. November 1, 1909

    Handy (Photographer), Hallen (Photographer), Special Collections/University Archives (Publisher)

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    Upper Gatun locks, east chamber, looking south. November 1, 1910

    Handy (Photographer), Hallen (Photographer), Special Collections/University Archives (Publisher)

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    Pedro Miguel Lock. Concrete Mixers, Loading Concrete in Buckets. November, 1910

    Handy (Photographer), Hallen (Photographer), Special Collections/University Archives (Publisher)

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    Pedro Miguel Lock, Looking South from Forebay, November 9, 1910

    Handy (Photographer), Hallen (Photographer), Special Collections/University Archives (Publisher)

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    Pedro Miguel Lock, The West Chamber, Looking North, November 11, 1910

    Handy (Photographer), Hallen (Photographer), Special Collections/University Archives (Publisher)

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    Miraflores Upper Locks, Looking South, Construction of East Side Wall, Showing Culvert, November 10, 1910

    Handy (Photographer), Hallen (Photographer), Special Collections/University Archives (Publisher)

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    Culebra Cut

    Looking north, December, 1904.

    Handy (Photographer), Hallen (Photographer), Special Collections/University Archives (Publisher)

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    Bottom of the Canal

    Raised for a short distance through pressure of the broken east Bank 18 feet above its original level, June, 1910.

    Handy (Photographer), Hallen (Photographer), Special Collections/University Archives (Publisher)

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    Cucaracha Slide, North End. From West Bank

    Handy (Photographer), Hallen (Photographer), Special Collections/University Archives (Publisher)

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    Lidgerwood Unloader - 14% Grade - Tabernilla Dumps

    Handy (Photographer), Hallen (Photographer), Special Collections/University Archives (Publisher)

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    The Cathedral Plaza, Panama, circa 1910

    Handy (Photographer), Hallen (Photographer), Special Collections/University Archives (Publisher)

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    Culebra Cut at Empire

    Looking North from Division Engineer's Office. June 4, 1910.

    Handy (Photographer), Hallen (Photographer), Special Collections/University Archives (Publisher)

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    Hydraulic Excavation, Miraflores

    Dredging Barges. December, 21, 1910.

    Handy (Photographer), Hallen (Photographer), Special Collections/University Archives (Publisher)

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    Hydraulic Excavation, Miraflores

    General View of Lower Lock Site. December 21, 1910.

    Handy (Photographer), Hallen (Photographer), Special Collections/University Archives (Publisher)

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    Gatun Upper Locks

    Constructing Monoliths. June, 1910.

    Handy (Photographer), Hallen (Photographer), Special Collections/University Archives (Publisher)

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    Lateral Culvert Forms and Floor, Miraflores Lock, July, 13, 1910

    Handy (Photographer), Hallen (Photographer), Special Collections/University Archives (Publisher)

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    Miraflores Upper Locks

    Lateral Culvert Forms in Place, July 13, 1910.

    Handy (Photographer), Hallen (Photographer), Special Collections/University Archives (Publisher)

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    City of Panama, from Ancon Hill

    Showing new Contrete Reservoir and Administration Building, July 1910.

    Handy (Photographer), Hallen (Photographer), Special Collections/University Archives (Publisher)