Why is gravel often specified to be placed in accordance with local code authority?

Gravel is often specified to be placed in accordance with local code authority to ensure proper drainage. This is critical because adequate drainage helps prevent water pooling and excess moisture, which can lead to various problems such as erosion, flooding, and damage to structures and foundations. Local codes often include specific guidelines about the installation of gravel to ensure that it meets regional climatic and geological conditions, thus promoting effective water management and soil stabilization.

Other options, while potentially relevant to different contexts, do not encapsulate the primary concerns related to gravel placement as defined by local codes. Aesthetic appeal and landscaping can be factors in some instances, but they are not typically governed by code. Pest prevention is not a primary function associated with gravel placements in most building and construction regulations. Therefore, ensuring proper drainage remains the most pertinent reason for these specifications.