maintenance of drinking water supply system for suburbs. gate valve replacement o

aging asphalt background clamp clay clothing composition construction corner crisis development dirt drinking earthwork engineer engineering environmental examining hole industrial industry issues large men meter mud nature occupation pipeline place potable process professional prop pump reflective repairing reservoir resources rusty savings scarcity screw serious shovel sign site small social stainless steel storage street suburbs sunlight supply sustainable symbol system tank town trench tube valve warming warning water wet work working world