These topographic maps can be used to assist homeowners in understanding how the stormwater flows in their neighborhoods.   This knowledge can be used to assist when developing best management practices for control of water flow on each homeowner's property.

Refer to the Legend located on the top left of the map to find features related to a variety of geographic and geologic features on the map.

Contour lines explained:

When you look at the map you will see a series of contour lines. Contour lines are used to determine elevations and are lines on a map that are produced from connecting points of equal elevation (elevation refers to height in feet, or meters, above sea level). Just remember these points when studying the map of your area as it relates to contour lines:

• Every point on a contour line represents the exact same elevation.
• Contour lines can never cross one another; each line represents a separate elevation.
• Moving from one contour line to another always indicates a change in elevation. To determine if it is a positive (uphill) or negative (downhill) change you must look at the elevation on either side.
• The closer contour lines are to one another, the steeper the slope is in the real world. If the contour lines are evenly spaced it is a constant slope, if they are not evenly spaced the slope changes.
• A series of closed contours (the contours make a circle) represents a hill. If the closed contours are hachured it indicates a closed depression.
• Contour lines crossing a stream valley will form a "V" shape pointing in the uphill (and upstream) direction