Erosion Control Devices

| No one knows when it happened: some would say perhaps it made no sound, or maybe no one was listening, but something changed in the watershed upstream of several properties in a Noblesville, IN, subdivision. Suddenly, the slope of a streambank in a neighborhood backyard began wasting away. ... READ MORE

Gabions and Channel Stabilization

| Perhaps nothing tests the stabilization of a channel or streambank like a significant flood event, such as Hurricane Harvey delivered in 2017. Such events highlight whether a long-established gabion installation has withstood the test of time. ... READ MORE

Working With Cofferdams and Turbidity Curtains

| Cofferdams and turbidity curtains may be neither high tech in performance nor especially exciting in appearance. If they’re made carefully and function the way they are supposed to, they seem, in fact, rather routine. But the work that they make possible is far from routine. They make possible high-tech projects in energy, construction, and other fields. They protect endangered flora and fauna and help companies stay in compliance with federal, state, and local environmental regulations. ... READ MORE

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 has unusual situational challenges based on project owner design preferences and site limitations. ... READ MORE

Stabilizing Hillsides and Creek Bottoms

| The rolling landscape of Scott County, MN, is rural but not particularly remote. "That area is farm country, and the Minnesota River goes through the entire area. On the top of the bluffs it's farmland, but at the river, the elevation drops about 200 feet in 800 feet," says Paul Nelson, environmental services program manager for Scott County. The scene is typical for the Minnesota River Valley; as the river winds through the 30-square-mile Blakeley Township, he says, "Parts of it are up on old glacial deposits, and some of it in ravines where glacial rivers cut through drop 200 to 300 feet in a mile or less. There are lots of eroding ravines." ... READ MORE

Case Studies in Tube-Based Sediment Control

| With traditional sediment control devices like straw wattles and silt fence, a drop-and-go installation style could be disastrous. Proper trenching, staking, and preparation of the BMP-soil interface means the difference between success and failure, which has led many manufacturers of sediment control products to design the next generation of more robust and installation-ready devices based on more sophisticated technology. ... READ MORE

The First Line of Defense: Protecting Inlets and Storm Drains

| In stormwater management for both temporary and post-construction measures, inlet and storm drain protection is one of the first lines of defense. It's also a measure that often works in combination with other best management practices (BMPs) as part of an overall erosion control or stormwater management program. ... READ MORE

Techniques for Stabilizing Slopes

| From stabilizing failing slopes to creating new slopes, erosion control contractors are turning to new technologies as well as relying on the tried and true in a number of projects throughout the US. ... READ MORE

Retaining Wall Project Profiles

| Retaining walls have become so much a part of our environment that most people barely notice them. However, professionals realize how much they have changed over the years and what an asset they have become. The ability to provide strength and integrity makes some projects possible that once would have not worked. The increasing desire for aesthetically pleasing walls has led to a blossoming of textures and colors for wall products. ... READ MORE

Keeping Water Quality High

| Snowy plovers are dainty little shorebirds, waders that scurry along beaches on legs that look like twigs. The timid plovers have white underbodies with brown feathers on top. The brown markings around their faces give them a quizzical look, somewhat like owls. ... READ MORE