Conservation Connection: Structural soil helps trees from busting sidewalks

ST. LOUIS — Community Foresters Danny Moncheski from the Conservation Department and Doug Seely of Beyond Housing say dense, clay soils found in the St. Louis area resist a tree's effort to grow its roots outward.  As these roots attempt to grow, they displace the clay soil and uplift adjacent sidewalks.

Structural Soil, developed by Cornell University contains a rigid stone load-bearing paving base, mixed with un-compacted soil.  It forms a lattice that holds nutrients and allows tree roots to grow outward without buckling the sidewalk.