Impermeable geomembrane for a Baltimore reservoir cofferdam

February 22, 2021

Druid Hill Reservoir is a one-billion-gallon (55-acre) potable water storage reservoir that supplies Baltimore, Md., and surrounding counties. Druid Hill Reservoir was constructed between 1863 and 1871 and is one of the largest earthen dammed lakes in North America. In 1971 it was named a National Historic Civil Engineering Landmark by the American Society of …

Ocean City, N.J., plans more geotextile tubes to protect beaches

February 17, 2021

By Maddy Vitale In a continuing effort to protect Ocean City’s beaches from coastal storms that chip away at the coastline, the New Jersey city is moving forward with plans to install another barrier in the areas most vulnerable to erosion. Geotextile tubes are gigantic sock-like cylinders made of plastic fabric and stuffed with sand. …

Layfield USA completes two CSPE reservoirs

February 15, 2021

Layfield USA Corp. announced the completion of the supply and installation of a chlorosulfonated polyethylene (CSPE) liner and floating cover system as part of a refurbishing and upgrade project for Pittsburgh Water & Sewer Authority’s (PWSA) Lanpher Reservoir. The Lanpher Reservoir is a double reservoir, potable water storage system (East and West reservoirs) with a …

Conductive liner for a copper mine reservoir

February 5, 2021

At a large copper mine in the U.S., a lined stormwater reservoir needed to be constructed for containment of runoff and process water. The integrity of the reservoir liner was critical as failure could result in contamination of groundwater. Solmax installed a double liner system, using Leak Location Conductive liner. This would ensure reliable electric …

Stabilizing Oyster Lake’s outfall

February 1, 2021

Preserving a unique ecosystem with an environmentally friendly solution By Drew Loizeaux Coastal dune lakes are freshwater lakes located within 2 miles (3.2 km) of an ocean coastline. These rare ecosystems are only found in a handful of locations around the globe, including Madagascar, New Zealand, Australia and Walton County, Fla. Walton County is home …

Base stabilization at Port of Invergordon, U.K.

January 18, 2021

A new 365,973-square-foot (34,000-m2) container area was required in the Port of Invergordon, U.K. The area was constructed as an unbound pavement with a crushed gravel surface. Presto GeoSystems GEOWEB geocells presented an excellent solution to minimize the overall cross-section depth through its unique load transfer mechanism while controlling differential settlement in the heavily loaded …

Presto GEOWEB slope protection with ATRA Tendon Clips

December 15, 2020

In North Yorkshire, U.K., 20 months of work has been completed by Balfour Beatty on a $21 million (£16 million) scheme to stabilize the cliff between Scarborough Spa and the Esplanade on Scarborough’s South Cliff. The South Cliff Slope Stabilization Scheme involved piling along the rear of the spa complex with almost horizontal drainage to …

Lake Francis Dam maintenance with GCCM

December 11, 2020

By Kurt Chirbas The Yuba Water Agency in Yuba County, Calif., was established in 1959 to reduce flood risk and provide a sustainable water supply to the people of the region. Yuba County has historically endured devastating floods, due in part to Gold Rush-era hydraulic mining practices that washed millions of cubic yards of debris …

Modest declines expected in 2021 transportation construction market, according to ARTBA

The U.S. transportation construction market is expected to shrink 5.5 percent next year, driven primarily by the severe economic recession caused by the coronavirus pandemic, according to the American Road and Transportation Builders Association’s (ARTBA’s) annual forecast. Overall, the value of work is expected to drop from $294.2 billion in 2020 to $278.1 billion in …

TRB webinar: Celebrating TRB’s centennial by exploring the future of transportation research

November 3, 2020

What is the future of transportation research and what is TRB’s role in that future? Learn from our panel of experts about how the scale and scope of TRB’s activities expanded steadily over the last 100 years, and what we might expect in the transportation field during the next 100 years. Join us on Thursday, …