A Topographic Survey is a type of survey which depicts the configuration (relief) of the earth's surface (ground) and the location of natural and artificial objects thereon. The Topographic and Vertical Classes of Accuracy, as defined in Section 20-300b-11 of the regulations, shall be noted. Bench marks shall be depicted or noted on all Class T-1, T-2 and T-3 Surveys. Survey datum and contour interval shall be depicted or noted.