What could indicate potential underground hazards when investigating a new job site?

The presence of long narrow depressions in the ground serves as a strong indicator of potential underground hazards. These depressions may suggest that there are voids or cavities below the surface caused by the erosion of soil or the collapse of underground structures, which could pose risks during excavation or construction activities. Identifying these telltale signs allows operators to take necessary precautions, such as conducting further investigation or employing specific safety measures, before proceeding with work.

While tall grass might obscure other signs, it does not inherently indicate underground issues; it may simply be a result of unkept land. Weather conditions can impact job site conditions but do not directly reveal underground hazards. Recent construction can contribute to site risks, but it does not specifically correlate to the presence of potential underground hazards like the telltale signs do. Recognizing the visual cues in the landscape is crucial for ensuring safety and effective planning prior to beginning excavation work.