GPR can be used to help locate underground utilities in congested or complicated areas and under reinforced concrete, where conventional line locating techniques may fail.  The image above (left) shows four closely spaced buried utilities with different sizes and occurring at different depths.  The GPR cross-sectional profile (above right) shows GPR reflections from a traverse over these utilities that easily resolves the four utilities.  AGS has found that GPR provides an additional layer of confidence to the typical utility locating procedures used during borehole clearance work to ensure safe drilling practices.