Another graphic from Better Plan, Rock County [1]:
It is also available in high resolution for print use and can be modified for use by other groups.
URL to article: https://www.wind-watch.org/alerts/2008/04/07/the-elephants-still-in-the-room/
URLs in this post:
[1] Better Plan, Rock County: http://betterplan.squarespace.com/
[2] Image: http://www.wind-watch.org/alerts/wp-content/uploads/2008/04/safer-setback-elephantweb.jpg