On Fri, 2 Jan 2009 20:31:34 -0800 (PST), "hr(bob) "
wrote:



I have used a garden hose running full force to tunnel under a
walkway, just be sure to go low inough to avoid whatever gravel is
under the sidewalk (hopefully)

Gravel? Under the sidewalk?

You remember my posts years ago about lifting up a square and getting
rid of tree roots. (Well maybe I didn't post on this). Until now I
didn't notice that there was no gravel.

(It's only cracked in one place, however. Of course one is not zero.)