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You may download the survey of the Stone Oak tract at the following link:

mages/Stone Oak Parkway/TopoTreePlan.dwg

Should you not use AutoCAD  and you need a viewer you can download one for free at the following link:

http://usa.autodesk.com/adsk/servlet/index?siteID=123112&id=837403

 

   
    Once you have this viewer if you right click on the image a drop down menu will appear which will allow you to view the various layers, such as grades and trees.