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    First-ever functional flow test conducted at Garrison Dam spillway [Image 20 of 27]

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    Three workers in high-visibility safety vests are walking across a wet, shallow spillway or apron area at the base of a large concrete dam structure. The surface is covered with a thin layer of water that creates mirror-like reflections of the sky and clouds. The scene appears to be an inspection or assessment of the dam infrastructure.

    UNITED STATES

    06.24.2026

    Photo by Delanie Stafford 

    U.S. Army Corps of Engineers, Omaha District

    Staff from the U.S. Army Corps of Engineers, Omaha District, Garrison Dam Project provide support during a functional flow test of the Garrison Dam spillway. The test measured water depth and velocity to calculate total spillway flow, providing valuable data to help ensure the spillway’s long-term performance and reliability. The operation also tested the spillway’s tainter gates to confirm they are ready to perform their critical flood-control role during future high-water events. (U.S. Army Corps of Engineers photo by Delanie Stafford)

    IMAGE INFO

    Date Taken: 06.24.2026
    Date Posted: 07.09.2026 11:02
    Photo ID: 9801347
    VIRIN: 260624-A-KS317-1021
    Resolution: 5376x3592
    Size: 5.45 MB
    Location: US
    Web Views: 14
    Downloads: 2

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    This work, First-ever functional flow test conducted at Garrison Dam spillway [Image 27 of 27], by Delanie Stafford, identified by DVIDS, must comply with the restrictions shown on https://www.dvidshub.net/about/copyright.

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    A group of workers or engineers in high-visibility safety vests and hard hats are standing on a walkway/catwalk of a large concrete dam structure. Water is visibly flowing through at least one of the spillway channels below the walkway. The image captures an apparent inspection or assessment activity at what appears to be a hydroelectric or flood-control dam.
    The image shows a large concrete dam with multiple spillway gates, photographed from an elevated angle. Several workers in high-visibility safety vests are visible on a maintenance walkway running along the face of the dam. Water is actively flowing through at least one of the spillway openings at the base, with a large reservoir visible behind the structure.
    The image shows a large concrete dam with multiple spillway gates, photographed from an elevated angle on the downstream side. A vast reservoir stretches behind the dam into the horizon, flanked by flat terrain and a vegetated peninsula on the right. Only a small number of gates appear to be releasing water, while the majority remain closed.
    The image shows a large concrete dam with multiple spillway gates actively releasing water downstream. A group of workers wearing high-visibility safety vests are visible on the inspection walkway mid-structure, suggesting an official inspection or maintenance visit. The reservoir behind the dam appears full, with calm blue water extending to the horizon.
    A group of workers or inspectors in high-visibility safety vests are gathered on top of a large concrete dam or flood barrier structure. They appear to be conducting an inspection or assessment, with some individuals holding documents or equipment. The structure features massive concrete piers, metal gate mechanisms, and is situated over a body of water.
    The image shows two large high-voltage electrical transmission towers (pylons) in the foreground, with a power substation and industrial storage tanks visible in the background. The scene is set in a rural, green landscape with rolling hills under a partly cloudy sky. The infrastructure suggests a major electrical generation or distribution facility in the area.
    The image shows a large concrete spillway dam with multiple open gates releasing water into a downstream channel or tailwater basin. A vast reservoir stretches behind the dam into the background. The scene is set in an open, flat landscape with green grass embankments, power lines overhead, and a partly cloudy blue sky.
    Two workers wearing high-visibility safety vests and white hard hats are inspecting a flood barrier or levee wall adjacent to a body of water. The person facing away is wearing a US Army Corps of Engineers 'Emergency Operations' vest. Heavy construction equipment, specifically an orange crane or reach forklift, is visible in the background.
    Three workers in high-visibility safety vests and hard hats are gathered near a concrete structure, likely a dam, lock, or water control facility. They appear to be conducting an inspection or site assessment, with one individual in military camouflage pants suggesting possible Army Corps of Engineers involvement. An orange confined space entry tripod/davit arm is visible in the foreground.
    Three workers in high-visibility safety vests and hard hats are gathered in conversation near a large concrete structure, likely a dam or water control facility. A fourth person, a woman in casual clothing, is seated in the background at a table. The setting appears to be an outdoor work site with red dirt ground, sparse vegetation, and a grassy embankment.
    Three workers in high-visibility safety vests and white hard hats are gathered in a discussion near a concrete wall and wire security fence at what appears to be an energy infrastructure facility. The setting includes red gravel ground, wild vegetation growing along the wall base, and heavy equipment visible in the background. Wind turbines and power transmission towers are visible in the distant background.
    A group of workers and officials in high-visibility safety vests and hard hats are conducting an inspection or site visit at a large concrete dam structure. They are standing on a metal grating walkway alongside the dam's spillway or gate mechanism, observing the water below. The setting appears to be a flood control or hydroelectric dam facility with murky brown water visible.
    Four workers in high-visibility safety vests and hard hats are gathered on a metal grating walkway alongside a large concrete dam or spillway structure. Three individuals appear to be in discussion while one examines the railing. The setting includes flowing water, a grassy embankment, and electrical transmission towers visible in the background.
    Two workers in high-visibility safety gear are engaged in conversation at what appears to be a dam or flood control structure. Both wear white hard hats and neon yellow/orange reflective vests, with one holding a two-way radio. Additional workers in safety gear are visible in the background near a chain-link fence.
    Three workers in high-visibility safety vests and hard hats are gathered in a discussion near a large concrete dam or spillway structure. They appear to be conducting a site inspection or project meeting on unpaved ground with sparse vegetation. The setting suggests a civil engineering or infrastructure maintenance context.
    Three personnel wearing high-visibility safety vests and hard hats are engaged in a discussion at what appears to be a dam or flood control structure. At least two of the individuals are affiliated with the U.S. Army Corps of Engineers, as indicated by the castle insignia and 'Emergency Operations' text visible on their vests. The setting is an outdoor infrastructure site with a large concrete dam structure, chain-link fencing, and sparse vegetation in the background.
    Two construction or engineering workers wearing U.S. Army Corps of Engineers hard hats and high-visibility safety vests are reviewing documents or blueprints at an outdoor site. One worker is pointing at the papers while the other holds the clipboard or document folder. A large concrete dam or flood control structure is visible in the background.
    Two construction or engineering workers wearing U.S. Army Corps of Engineers hard hats and high-visibility safety vests are standing in front of a large concrete dam structure. One worker is pointing in a direction, apparently indicating something of interest to his colleague. The setting suggests an active dam inspection or construction oversight visit.
    Three construction or site inspection workers wearing high-visibility safety vests and white hard hats are walking across a large, wet reflective surface, likely a freshly poured concrete slab or flooded flat terrain. Their reflections are clearly visible in the standing water on the surface. The background shows tiered or stepped terrain with patches of green vegetation.
    Three workers in high-visibility safety vests are walking across a wet, shallow spillway or apron area at the base of a large concrete dam structure. The surface is covered with a thin layer of water that creates mirror-like reflections of the sky and clouds. The scene appears to be an inspection or assessment of the dam infrastructure.
    Two workers in high-visibility safety gear are inspecting or discussing operations at a large concrete dam structure. The worker facing the camera is wearing a U.S. Army Corps of Engineers hard hat and vest, and is gesturing toward the dam's spillway area. The setting appears to be the base or service level of a major flood control or hydroelectric dam facility.
    A worker wearing a safety helmet and harness is climbing or descending a ladder inside a large cylindrical or tunnel-like structure with arched metal ribbing. The perspective is shot from below looking upward along the ladder, creating a dramatic vanishing-point composition. The structure appears to be an industrial or infrastructure component, possibly the interior of a large pipe, silo, or dam spillway.
    Three workers in high-visibility safety vests and hard hats are gathered between two utility vehicles at the base of a large concrete dam or spillway structure. The surface beneath them is wet and reflective, suggesting recent water flow or rain. The workers appear to be conducting inspection or maintenance operations along the dam face.
    The image shows the downstream face of a large concrete dam with prominent diagonal buttresses running along its length. A metal walkway/catwalk is visible mid-level on the dam face. At the base of the dam, several workers and green utility vehicles are present on a wet concrete apron.
    Workers in high-visibility safety vests and hard hats are conducting maintenance or inspection operations at the base of a large concrete dam. The wet surface suggests recent water flow or spillway activity, and the crew is using utility vehicles including what appear to be John Deere Gator-style UTVs to transport equipment. The massive buttressed concrete dam wall dominates the background, extending across the full width of the image.
    A crew of construction or utility workers in high-visibility safety vests and hard hats are gathered on a flooded surface, likely a parking lot or roadway covered in shallow standing water. They are accompanied by two utility vehicles — a Bobcat UTV on the left and a green John Deere utility vehicle with a flatbed trailer on the right. The workers appear to be assessing or responding to the flooding conditions with equipment loaded on the trailer.
    The image shows a large concrete dam or flood control structure with multiple spillway gates releasing water. In the background, a distinctive baseball-shaped water tower is visible above a grassy embankment, along with trees, buildings, and utility infrastructure. Workers in high-visibility vests can be seen on the dam's walkway, suggesting active inspection or maintenance.

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    Spillway flow test conducted for Garrison Dam Safety Modification Project

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    Garrison Dam, Flow Test, Flood Risk Reduction, U.S. Army Corps of Engineers, Omaha District

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