What does a contour line indicate on a site plan?

A contour line on a site plan is used to represent changes in elevation across the terrain. These lines connect points of equal elevation, providing a visual representation of the topography of the site. By understanding the spacing and shape of the contour lines, one can determine the steepness of slopes, potential drainage issues, and how the land might be affected by construction or development.

In contrast, the other options focus on different aspects of a site plan. The location of utilities pertains to where services such as water, sewage, and electricity are situated, which would be shown through different symbols or markers. Property boundaries define the legal limits of the land but are not represented by contour lines; they usually appear as straight lines or marked boundaries. Soil types, important for understanding the ground conditions, would typically be indicated through specific color coding or patterns rather than contour lines.