[Untitled photo, possibly related to: Old shutes through which powdered ore was transported. Gold mine, Mogollon, New… https://www.rawpixel.com/image/12172939/image-art-vintage-goldFree Image from public domain licenseBuilding blocks structure design graphic https://www.rawpixel.com/image/286482/image-rawpixelcomView license[Untitled photo, possibly related to: Phelps Dodge refining company, El Paso, Texas. Copper is recovered from smoke that… https://www.rawpixel.com/image/12295759/photo-image-plant-smoke-public-domainFree Image from public domain licenseForm for pouring concrete cap for culvert pipe. Safe well demonstration near La Plata, Maryland. Charles County. Sourced… https://www.rawpixel.com/image/12286683/photo-image-person-wood-public-domainFree Image from public domain licenseMr. Slater, well engineer, and helper, settle drop pipe into casing. John Fredrick well Project, Saint Mary's County… https://www.rawpixel.com/image/12287430/photo-image-face-plant-peopleFree Image from public domain licenseConstruction work of the sewage disposal plant and sewer lines leading to it. About ten miles of sewer pipe are being laid… https://www.rawpixel.com/image/12149219/image-plant-person-artFree Image from public domain licensePump is settled onto pump rod and drop pipe. Pipe wrench still keeps drop pipe from slipping into well. John Fredrick well… https://www.rawpixel.com/image/12287418/photo-image-person-public-domain-manFree Image from public domain licenseDetail of derrick showing traveling block, kelly joint, rotary table and lengths of drill pipe, Kilgore, Texas by Russell Lee https://www.rawpixel.com/image/12171078/image-person-art-skyFree Image from public domain licenseNewton County, Missouri. Camp Crowder area. Wife of construction worker from Oklahoma living in tent along U.S. Highway No.… https://www.rawpixel.com/image/12284713/photo-image-face-hand-peopleFree Image from public domain license