Utility Surveys are exactly like they sound. They are a survey or map undertaken to reflect the location, size, depth, or condition of subsurface utility lines. By means of physical observation, probing, potholing, excavation, or review of construction drawings, surveys create maps that show the location and depth of existing utility lines that can be used for comparison, design, construction, or repair. In most cases, utility surveys require the use of highly specialized subsurface locating equipment like ground penetrating radar to locate subsurface lines. If site or soil conditions are too difficult, sometimes the employment of an excavator or hydro excavation team is necessary to locate subsurface utilities for mapping. Utility surveys are generally prepared for cities, counties, engineers, and contractors.