Topsoil is the upper, outermost layer of soil, usually the top 2 inches (5.1 cm) to 8 inches (20 cm). It has the highest concentration of organic matter and microorganisms and is where most of the Earth’s biological soil activity occurs. It also houses many organisms.
Editor’s note: This article first appeared in the January/February 2016 issue of Grading & Excavation Contractor.
Industry experts agree: using a piece of compact equipment with multiple attachments turns that one machine into a multipurpose tool for road construction site preparation work that can help contractors complete their jobs more efficiently, bid on
Remember how 10 blindfolded people in a room each describe the elephant from their own perspective? The same might be said of soil—the stuff we interchangeably refer to as ground, dirt, or surface covering. Eric C. Brevik, a professor of soil science at Dickinson State University in North Dakota, illustrates
One of the great gifts of writing is the knowledge that one gains from the research necessary to create intelligent composition. My high school English teacher—who also taught Kurt Vonnegut—once told me that there were seven basic plots in literature and not to worry about outlining a wholly original narrative,
It was the setting for a perfect disaster: historic level droughts, acres of dry forest and grassland, huge reserves of dead wood fuel, and a hurricane that sucked any moisture from the air. Locals said it was just “powder-keg dry.” Implementing a revegetation plan after a wildfire is a challenge;
By Janet Aird
In revegetation, everything begins with the soil—usually poor soil.
Soils may become degraded during the construction of buildings, roadside projects, or mining or landfill operations, or because of overgrazing or deforestation. They lose their topsoil, usually the top 2- to 8-inch layer of the soil, where the most important nutrients lie.
The steep slopes and compressible soils caused concern that the road might, sometime in the future, shift and even crack if precast concrete panel retaining walls were used. Florida Department of Transportation (FDOT) officials suggested that 1:1 slope reinforcement with geogrid be used instead.
Racine, Wis., September 29, 2016
CASE Construction Equipment, Folcomer Equipment and Groff Tractor provided equipment and product/training support to veteran-led disaster response organization Team Rubicon for use in training 10 new participants in its heavy equipment training program. The training included course work, and then practical operation in laying riprap for
For earthwork contractors the key to survival is an accurate estimate of earthwork volumes. Without an accurate estimate of earthwork volumes, the contractor will be unable to properly assign construction assets or formulate a project schedule. Estimating earthwork construction requires many assumptions and unknowns.