| [College of ACES] | [University of Illinois] | [Illinois CES] |
Thank you for an excellent reference, but it doesn't really fit the "least intrusive goal" that people are shooting for.
The drawing shows significant replacement and specs of new materials down to a depth that would destroy most roots of existing trees:
<IMG SRC="http://www.gis.net/~dmiller/porpave.gif"/IMG SRC>
