What is typically considered a safe practice when excavating near existing utilities?

The safest practice when excavating near existing utilities is to always call before you dig. This step is crucial because it ensures that utility companies can mark the location of underground lines, such as water, gas, electric, and telecommunications. By notifying the utility companies beforehand, you minimize the risk of accidentally damaging these vital lines, which can lead to serious safety hazards, service disruptions, or expensive repairs. It also helps in avoiding legal liabilities that could arise from unpermitted excavations.

Other options fail to prioritize safety and responsible excavation practices. Excavate without prior notice disregards the essential step of utility verification, posing significant risks to workers and the public. Only checking underground once suggests a lack of diligence, as conditions may change and multiple checks are often necessary for safety. Starting to dig as fast as possible emphasizes speed over safety, which can lead to accidents and injuries. Thus, the correct answer reflects a commitment to proper safety procedures in construction and excavation work.