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    Male adult engineer in water treatment plant — Stock Photo
    Male adult engineer in water treatment plant
    Lab chemist capturing a digital image of a sample slide on a microscope — Stock Photo
    Lab chemist capturing a digital image of a sample slide on a microscope
    Glass beakers in laboratory, close-up view — Stock Photo
    Glass beakers in laboratory, close-up view
    Construction supervisor using electronic surveying rod — Stock Photo
    Construction supervisor using electronic surveying rod
    One engineer on computer starting up the water treatment plant in program for supervisory control and data acquisition — Stock Photo
    One engineer on computer starting up the water treatment plant in program for supervisory control and data acquisition
    Heavy construction equipment operator in excavator — Stock Photo
    Heavy construction equipment operator in excavator
    Construction workers signaling excavator operator lifting chain — Stock Photo
    Construction workers signaling excavator operator lifting chain
    Construction workers using torque wrench to secure water main section with bolts — Stock Photo
    Construction workers using torque wrench to secure water main section with bolts
    Engineer installing new membranes in an O2 electrochemical sensor probe in a laboratory — Stock Photo
    Engineer installing new membranes in an O2 electrochemical sensor probe in a laboratory
    Excavator operator lifting shoring attached to bucket — Stock Photo
    Excavator operator lifting shoring attached to bucket
    Construction worker holding water main pipe suspended by excavator — Stock Photo
    Construction worker holding water main pipe suspended by excavator
    Construction workers preparing to lift gate valve for water main — Stock Photo
    Construction workers preparing to lift gate valve for water main
    Construction workers preparing for excavator to lift water main into place — Stock Photo
    Construction workers preparing for excavator to lift water main into place
    Construction worker using torque wrench to secure water main section with bolts — Stock Photo
    Construction worker using torque wrench to secure water main section with bolts
    Scenic view of Rain barrel for rainwater harvesting — Stock Photo
    Scenic view of Rain barrel for rainwater harvesting
    Engineer recording data at public works control center — Stock Photo
    Engineer recording data at public works control center
    Excavator operator lifting shoring attached to bucket — Stock Photo
    Excavator operator lifting shoring attached to bucket
    Construction worker moving gate valve on street — Stock Photo
    Construction worker moving gate valve on street
    Construction worker preparing water main for installation — Stock Photo
    Construction worker preparing water main for installation
    Engineer installing new membranes in an O2 electrochemical sensor probe in a laboratory — Stock Photo
    Engineer installing new membranes in an O2 electrochemical sensor probe in a laboratory
    Construction workers digging hole to replace watermain — Stock Photo
    Construction workers digging hole to replace watermain
    Two engineers on computers starting up the water treatment plant in program for supervisory control and data acquisition — Stock Photo
    Two engineers on computers starting up the water treatment plant in program for supervisory control and data acquisition
    Construction workers going down ladders into shoring — Stock Photo
    Construction workers going down ladders into shoring
    Construction worker measuring length of water main section — Stock Photo
    Construction worker measuring length of water main section
    Engineer rebuilding an O2 electrochemical sensor probe in a laboratory — Stock Photo
    Engineer rebuilding an O2 electrochemical sensor probe in a laboratory
    Construction workers unhooking old watermain from excavator — Stock Photo
    Construction workers unhooking old watermain from excavator
    Heavy construction equipment operator in excavator — Stock Photo
    Heavy construction equipment operator in excavator
    Engineer rebuilding an O2 electrochemical sensor probe in a laboratory — Stock Photo
    Engineer rebuilding an O2 electrochemical sensor probe in a laboratory
    Construction worker watching as old watermain is removed with excavator from street — Stock Photo
    Construction worker watching as old watermain is removed with excavator from street
    Scenic view of Spring Point Ledge Lighthouse, Portland, Maine, United States — Stock Photo
    Scenic view of Spring Point Ledge Lighthouse, Portland, Maine, United States
    Construction worker guiding water main into place — Stock Photo
    Construction worker guiding water main into place
    Construction worker guiding chain attached to excavator — Stock Photo
    Construction worker guiding chain attached to excavator
    Construction workers guiding water main into place — Stock Photo
    Construction workers guiding water main into place
    Construction workers using torque wrench to secure water main section with bolts — Stock Photo
    Construction workers using torque wrench to secure water main section with bolts
    Construction workers attaching sections of water main together in front of excavator — Stock Photo
    Construction workers attaching sections of water main together in front of excavator
    Construction worker using strap on excavator to guide water main section — Stock Photo
    Construction worker using strap on excavator to guide water main section
    Construction supervisor using surveying rod — Stock Photo
    Construction supervisor using surveying rod
    Construction workers cutting water main to length with gas powered saw — Stock Photo
    Construction workers cutting water main to length with gas powered saw
    Construction supervisor using electronic surveying rod — Stock Photo
    Construction supervisor using electronic surveying rod
    Construction workers climbing down ladder into shoring — Stock Photo
    Construction workers climbing down ladder into shoring
    Construction workers taking a break — Stock Photo
    Construction workers taking a break
    Construction workers preparing to climb down hole with ladder — Stock Photo
    Construction workers preparing to climb down hole with ladder
    Construction workers attaching sections of water main together in front of excavator — Stock Photo
    Construction workers attaching sections of water main together in front of excavator
    Water department engineer standing in chemical treatment room — Stock Photo
    Water department engineer standing in chemical treatment room
    Construction worker climbing down ladder into shoring — Stock Photo
    Construction worker climbing down ladder into shoring
    Water department technician reinstalling caps on fire hydrant — Stock Photo
    Water department technician reinstalling caps on fire hydrant
    Engineer installing new membranes in an O2 electrochemical sensor probe in a laboratory — Stock Photo
    Engineer installing new membranes in an O2 electrochemical sensor probe in a laboratory
    Two engineers on computers starting up the water treatment plant in program for supervisory control and data acquisition — Stock Photo
    Two engineers on computers starting up the water treatment plant in program for supervisory control and data acquisition
    Water department technician using flow rate sensor — Stock Photo
    Water department technician using flow rate sensor
    Construction workers attaching sections of water main together — Stock Photo
    Construction workers attaching sections of water main together
    Water treatment engineer in treatment room — Stock Photo
    Water treatment engineer in treatment room
    Construction worker guiding water main into place — Stock Photo
    Construction worker guiding water main into place
    Construction worker preparing to enter shored up hole with shovels — Stock Photo
    Construction worker preparing to enter shored up hole with shovels
    Construction workers using hand wrench to secure water main section with bolts — Stock Photo
    Construction workers using hand wrench to secure water main section with bolts
    Engineer polishing O2 electrochemical sensor probe in laboratory — Stock Photo
    Engineer polishing O2 electrochemical sensor probe in laboratory
    Construction supervisor watching as old watermain is removed from street — Stock Photo
    Construction supervisor watching as old watermain is removed from street
    Construction foreman guiding excavator operator — Stock Photo
    Construction foreman guiding excavator operator
    Construction worker using saw to cut through old water pipe — Stock Photo
    Construction worker using saw to cut through old water pipe
    Water department technician opening fire hydrant to flush water mains — Stock Photo
    Water department technician opening fire hydrant to flush water mains
    Satellite dish and power transmission towers — Stock Photo
    Satellite dish and power transmission towers