Why is it important to have accurate contour lines in site plans?

Accurate contour lines in site plans are crucial because they illustrate the topography of the land, which plays a vital role in various aspects of drainage and construction. By representing changes in elevation, contour lines allow engineers and architects to understand how water will flow across the site, helping them design effective drainage systems and prevent potential flooding issues. Additionally, contour lines inform decisions regarding excavation and grading, ensuring that the construction meets both safety standards and functional requirements. Understanding the land’s topographic features is essential for successfully integrating a building into its environment.