What should always be checked before beginning excavation work?

Before beginning excavation work, it is essential to check all of the listed factors: soil composition, local zoning laws, and existing structures' stability. Each of these elements plays a critical role in ensuring that excavation activities proceed safely and legally.

Assessing soil composition is crucial because it affects the stability of the excavation site and informs decisions regarding engineering practices. Different soil types can present various challenges, such as drainage issues or the potential for collapse.

Reviewing local zoning laws is important to ensure compliance with regulations that govern land use. These laws dictate what kind of activities can take place on a property and often require permits or adherence to specific construction codes that must be followed.

Evaluating the stability of existing structures is necessary to avoid damage during excavation. Excavation can alter the weight distribution and groundwater conditions around nearby buildings, potentially undermining their foundations.

By checking all these factors before excavation, a builder can mitigate risks, ensure compliance with legal standards, and safeguard both the construction site and surrounding properties. This comprehensive approach is why the correct choice encompasses all of these considerations.