Mangahao Hydro-Electric scheme : 36th and 37th visits - 1924 (1924) by Leslie Adkin. https://www.rawpixel.com/image/13029403/image-person-pattern-waterFree Image from public domain licenseMangahao Hydro-Electric scheme : 1923-1924 (1923-1924) by Leslie Adkin. https://www.rawpixel.com/image/13029576/mangahao-hydro-electric-scheme-1923-1924-1923-1924-leslie-adkinFree Image from public domain licenseMangahao Hydro-Electric scheme : 36th and 37th visits - 1924 (1924) by Leslie Adkin. https://www.rawpixel.com/image/13029412/image-person-water-mountainFree Image from public domain licenseRailing by a foggy dam https://www.rawpixel.com/image/488370/free-photo-image-barrage-dam-concreteView licenseView from the top of a tall concrete dam on the river below. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3300548/free-photo-image-adventure-cc0-concreteFree Image from public domain licenseMuggenhof U-Bahn Station. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3295380/free-photo-image-art-cc0-concreteFree Image from public domain licenseThe side of a pier. Visit Kaboompics for more free images. https://www.rawpixel.com/image/436056/free-photo-image-bay-blue-closeView license[Untitled photo, possibly related to: Workmen using viberators which spread the wet concrete in construction of Shasta Dam… https://www.rawpixel.com/image/12171546/image-people-art-vintageFree Image from public domain licenseMangahao Hydro-Electric scheme - 39th and 40th visits : 1924-1925 (1924-1925) by Leslie Adkin. https://www.rawpixel.com/image/13029254/image-dog-person-waterFree Image from public domain licenseA U.S. Navy MH-53E Sea Dragon helicopter with Helicopter Mine Countermeasures Squadron (HM) 14, embarked aboard the… https://www.rawpixel.com/image/8741689/photo-image-public-domain-personFree Image from public domain licenseFSA/8b34000/8b34600\8b34652a.tif. Sourced from the Library of Congress. https://www.rawpixel.com/image/12323101/image-pattern-public-domain-landscapeFree Image from public domain licenseMangahao Hydro-Electric scheme : 1929 (1929) by Leslie Adkin. https://www.rawpixel.com/image/13028618/mangahao-hydro-electric-scheme-1929-1929-leslie-adkinFree Image from public domain license[Untitled photo, possibly related to: Washington, Yakima County, Roza Irrigation Canal. Sides concrete, lined by machine.… https://www.rawpixel.com/image/12249411/photo-image-shadow-public-domain-natureFree Image from public domain licenseConstruction workers using tools to settle freshly-poured concrete, Shasta Dam. Shasta County, California by Russell Lee https://www.rawpixel.com/image/12171743/image-people-art-vintageFree Image from public domain licensePutting concrete on Pit River Bridge which is above Shasta Dam, Shasta County, California by Russell Lee https://www.rawpixel.com/image/12172145/image-person-art-vintageFree Image from public domain license[Untitled photo, possibly related to: Pouring concrete at Shasta Dam, Shasta County, California] by Russell Lee https://www.rawpixel.com/image/12172927/image-person-art-skyFree Image from public domain licenseThis workman controls amounts of materials going into concrete used in construction of Shasta Dam. Shasta County, California… https://www.rawpixel.com/image/12151430/image-person-art-vintageFree Image from public domain licenseDumping bucket of concrete in construction of Shasta Dam, Shasta County, California by Russell Lee https://www.rawpixel.com/image/12171325/image-person-art-vintageFree Image from public domain licenseShasta Dam, Shasta County, California. Dam under construction showing the forms for concrete by Russell Lee https://www.rawpixel.com/image/12144209/image-art-sky-vintageFree Image from public domain license[Untitled photo, possibly related to: Shasta Dam, Shasta County, California. Foot of head tower from which cable buckets… https://www.rawpixel.com/image/12152416/image-art-sky-vintageFree Image from public domain licenseWorkmen using viberators which spread the wet concrete in construction of Shasta Dam, Shasta County, California by Russell… https://www.rawpixel.com/image/12171571/image-person-art-vintageFree Image from public domain license[Untitled photo, possibly related to: Pouring concrete at Shasta Dam, Shasta County, California] by Russell Lee https://www.rawpixel.com/image/12171480/image-person-art-skyFree Image from public domain license[Untitled photo, possibly related to: Signal man at Shasta Dam, Shasta County, California. He telephones to crew at central… https://www.rawpixel.com/image/12172150/image-face-hand-personFree Image from public domain licenseOperating viberators which spread concrete, Shasta Dam, Shasta County, California by Russell Lee https://www.rawpixel.com/image/12173206/image-person-art-vintageFree Image from public domain licensePermanent automatic graph of various materials which go into the concrete used in construction of Shasta Dam. Shasta County… https://www.rawpixel.com/image/12152367/image-face-person-artFree Image from public domain license[Untitled photo, possibly related to: Shasta Dam, Shasta County, California. Dam under construction showing the forms for… https://www.rawpixel.com/image/12151169/image-art-sky-vintageFree Image from public domain licenseShasta Dam, Shasta County, California. The dam under construction, showing the wooden forms for concrete by Russell Lee https://www.rawpixel.com/image/12151329/image-person-art-skyFree Image from public domain licenseSignal man at Shasta Dam, Shasta County, California. He telephones to crew at central tower and instructs them how to handle… https://www.rawpixel.com/image/12173215/image-face-hand-personFree Image from public domain licenseWorkmen using viberators which spread the wet concrete in construction of Shasta Dam, Shasta County, California by Russell… https://www.rawpixel.com/image/12167529/image-person-art-vintageFree Image from public domain licenseWorkmen using viberators which spread the wet concrete in construction of Shasta Dam, Shasta County, California by Russell… https://www.rawpixel.com/image/12172923/image-people-art-vintageFree Image from public domain licenseWorkman working on forms for concrete at Shasta Dam, Shasta County, California by Russell Lee https://www.rawpixel.com/image/12172377/image-person-art-vintageFree Image from public domain licenseMangahao Hydro-Electric scheme - 37th and 38th visits : 1924 (1924) by Leslie Adkin. https://www.rawpixel.com/image/13028668/image-person-water-clothingFree Image from public domain license[Untitled photo, possibly related to: Pouring concrete at Shasta Dam, Shasta County, California] by Russell Lee https://www.rawpixel.com/image/12172875/image-person-art-skyFree Image from public domain license[Untitled photo, possibly related to: Pouring concrete at Shasta Dam, Shasta County, California] by Russell Lee https://www.rawpixel.com/image/12171270/image-person-art-skyFree Image from public domain licenseShasta Dam, Shasta County, California. Vibrating newly-poured concrete at the dam to remove excess air and assure even… https://www.rawpixel.com/image/12152424/image-person-art-patternFree Image from public domain licenseWorkmen using viberators which spread the wet concrete in construction of Shasta Dam, Shasta County, California by Russell… https://www.rawpixel.com/image/12171472/image-person-art-vintageFree Image from public domain licenseShasta Dam, Shasta County, California. Dumping concrete in construction of dam by Russell Lee https://www.rawpixel.com/image/12152136/image-person-art-patternFree Image from public domain licensePutting concrete on Pit River Bridge which is above Shasta Dam, Shasta County, California by Russell Lee https://www.rawpixel.com/image/12172142/image-plant-people-artFree Image from public domain license[Untitled photo, possibly related to: Operating viberators which spread concrete, Shasta Dam, Shasta County, California] by… https://www.rawpixel.com/image/12171306/image-person-art-vintageFree Image from public domain licenseWetting down freshly-poured concrete, Shasta Dam, Shasta County, California by Russell Lee https://www.rawpixel.com/image/12172158/image-shadow-person-artFree Image from public domain licenseDumping concrete in construction of Shasta Dam, Shasta County, California by Russell Lee https://www.rawpixel.com/image/12171462/image-plant-person-artFree Image from public domain license[Untitled photo, possibly related to: Wetting down freshly-poured concrete, Shasta Dam, Shasta County, California] by… https://www.rawpixel.com/image/12172135/image-shadow-person-artFree Image from public domain licenseWater Resources Forest Trees Plant Natural Dam Concept https://www.rawpixel.com/image/650246/free-image-rawpixelView license[Untitled photo, possibly related to: Columbia Steel Company at Geneva, Utah. Steel and concrete go into place rapidly as a… https://www.rawpixel.com/image/12297934/photo-image-plant-sky-public-domainFree Image from public domain licenseDAM Digital Asset Management Organization Concept https://www.rawpixel.com/image/650409/free-image-rawpixelView licenseColumbia Steel Company at Geneva, Utah. Steel and concrete go into place rapidly as a new steel mill takes form. The new… https://www.rawpixel.com/image/12298177/photo-image-plant-sky-public-domainFree Image from public domain licenseWorking on forms for concrete at Shasta Dam, Shasta County, California by Russell Lee https://www.rawpixel.com/image/12172140/image-person-art-vintageFree Image from public domain licenseWater Resources Forest Trees Plant Natural Dam Concept https://www.rawpixel.com/image/650166/free-image-rawpixelView licenseWetting down freshly-poured concrete, Shasta Dam, Shasta County, California by Russell Lee https://www.rawpixel.com/image/12172136/image-shadow-person-artFree Image from public domain licenseBoulder Dam, (i.e. Hoover Dam) between Arizona and Nevada. Placing concrete in the sidewall of the Nevada spillway. A 2… https://www.rawpixel.com/image/12287889/photo-image-background-note-waterFree Image from public domain license[Untitled photo, possibly related to: Dumping concrete in construction of Shasta Dam, Shasta County, California] by Russell… https://www.rawpixel.com/image/12171478/image-person-art-skyFree Image from public domain license