A depth-of-cover survey allows the client to make a determination as to whether sufficient cover between the top of the pipeline and the ground level is present to meet local, state, and federal regulations. Proper cover protects the pipeline from third-party human activities and environmental scour. Regulations may vary from state to state on the requirements for the depth of a pipeline and how often a depth-of-cover survey must be conducted. Depth-of-cover surveys are typically conducted periodically per operator specifications and are often coupled with other survey types such as close interval or ACVG/DCVG. In areas of cultivation or higher than normal erosion, a survey may need to be conducted every few years.