Tag: soils

Soil is the mixture of minerals, organic matter, gases, liquids, and countless organisms that together support plant life. Two general classes are topsoil and subsoil.

Identification of Wetland Plants in Winter

Wetland plants, also known as hydrophytes or hydrophytic vegetation, have adaptations that enable them to grow and reproduce with their roots in water or saturated soil for at least part of the year. In contrast, plants that cannot survive in saturated conditions are commonly referred to as upland plants.

Along with

Staying Power

Staying Power

When it comes to paving, “there is a place for asphalt and a place for concrete,” notes Bill Davenport, vice president of communications for the American Concrete Pavement Association.

Retaining Walls to Overcome Site Limitations

Retaining Walls to Overcome Site Limitations

Occasionally, a project comes along that pushes beyond the boundary of a typical installation. Several recent projects do just that—an amusement park pedestrian bridge, an elevated entrance drive, and coastal bluff stabilization. All involve components intended to contain subgrade materials and improve the human landscape in aesthetic ways. Each project

Seeding for Progress and Restoration

Seeding for Progress and Restoration

The Palouse region of eastern Washington is known as one of the most fertile expanses of land in the world, with rich topsoil plunging to a depth of 100 feet or more. As Kurt Merg, vegetation ecologist for the Washington Department of Fish and Wildlife, explains, it is one of

Pushing the Boundaries of Stability

Pushing the Boundaries of Stability

Occasionally, a project comes along that pushes beyond the boundary of a typical installation. Several recent projects do just that—an amusement park pedestrian bridge, an elevated entrance drive, and coastal bluff stabilization. All involve components intended to contain subgrade materials and improve the human landscape in aesthetic ways. Each project

Twenty-Year Engineering Assessment of an LID Facility in Boulder, CO

This article provides a summary of the evolution of small stormwater control facilities constructed approximately 20 years ago using low impact development (LID) principles at a 10,000-square-foot office site in Boulder, CO. This project was undertaken to demonstrate how surface stormwater controls designed as multifunctional systems can support regionally appropriate

Eating Lunch vs. Being Lunch

Eating Lunch vs. Being Lunch

We have an adversarial relationship to fire these days. This year has been one of the worst for wildfires in the US; at various times this fall, more than 2 million acres have been burning at once. The US Fish and Wildlife Service estimated, back in September, that more than

Project Profile: Set Your Watch by the ADTs

Project Profile: Set Your Watch by the ADTs

Developments around Vancouver, British Columbia, show no signs of slowing down. In fact, Vancouver, like much of the West Coast in the United States, remains a hotbed for real estate developers. Just south of Vancouver in Tsawwassen, crews are moving materials to make way for Phase 2 of the Aquilini

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