Which statement about contour lines is true for site plans?

Which statement about contour lines is true for site plans?

• A. They show elevations and slope
• B. They show trees
• C. They show water lines
• D. They show zoning

Answer: (A)

Contour lines on site plans represent elevation and slope. Each line connects points at the same height, so you can read how ground elevation changes across the site. The spacing of the lines indicates slope steepness—closer lines mean steeper terrain, wider spacing means gentler slopes. This information is critical for grading, drainage design, and deciding where to place structures. Contour lines themselves do not show trees, water lines, or zoning, which are shown with separate map elements or layers.

Contour lines on site plans represent elevation and slope. Each line connects points at the same height, so you can read how ground elevation changes across the site. The spacing of the lines indicates slope steepness—closer lines mean steeper terrain, wider spacing means gentler slopes. This information is critical for grading, drainage design, and deciding where to place structures. Contour lines themselves do not show trees, water lines, or zoning, which are shown with separate map elements or layers.