GMA Techline

August 1, 2017

Liner repair? Pullout tests? Sewn seams? Shear strength of sludges? Geomembrane liner repair Q: I have a facility that has submitted liner repair documentation for the repair of a high-density polyethylene (HDPE) liner for a leachate/stormwater pond at an industrial landfill site. The repairs were performed using either a patch or, for indentations and small …

In the classroom: Part 2: Geosynthetic coursework at Syracuse University, and Part 3: Geosynthetics education from IGS–NA

Introduction This article is part of a 4-part series on how engineering students or practicing engineers learn about geosynthetic materials. Geosynthetic materials have been used in civil and environmental engineering applications for more than three decades. The benefits of geosynthetic materials are widely recognized, and they are used in a variety of industries. The high …

Final Inspection: FAA awards $527.8 million to airports

U.S. Department of Transportation (USDOT) secretary Elaine Chao announced May 31, 2017, that the Federal Aviation Administration (FAA) will award $527.8 million in airport infrastructure grants to 584 airports across the United States as part of the FAA’s Airport Improvement Program (AIP). “The Airport Improvement Program helps to maintain our aviation infrastructure and supports safety, …

Recap of the 2017 GMA Spring Lobby Day

‘Here, sir, the people govern.’ Alexander Hamilton said these words in 1788, remarking on the U.S. House of Representatives during debate on the adoption of the Constitution. At the time, the United States system of government was unique in a monarchical world. Even today, America’s experiment with democracy makes it impossible to go to Capitol …

Editorial: The management of coal combustion residuals (CCR)

The management of coal combustion residuals (CCR or “coal ash”) is a growth category for the geosynthetics industry. Multiple opportunities now exist using various types of geosynthetics due to the evolving federal and state regulations for handling CCR. In fact, geosynthetics have played a role in the regulations that have developed. “These regulations have been …

CCR management using geotextile tubes

Introduction Since the late 1800s, coal has played a leading role in U.S. production of electrical energy. Coal-fired power plants have provided reliable electrical power from the earliest days when power plants were run with hand-fed coal to heat boilers to produce steam. The introduction of pulverized coal led to improvements in the electrical-generation process …

Panorama: California passes law to spend $52.4 billion on infrastructure, and EPA’s hydrologic evaluation of landfill performance (HELP) model

California passes law to spend $52.4 billion on infrastructure Gov. Edmund G. Brown Jr. signed a package of legislation to improve transportation and create jobs in communities across California. “Safe and smooth roads make California a better place to live and strengthen our economy,” said Gov. Brown. “This legislation will put thousands of people to …

Using geosynthetics for macroencapsulation for CCR on-site clean closure

Coal combustion residuals (CCR) have been used for many years in the construction of berms and engineered structural fill applications, including embankments for highways, dikes, and levees. However, large, unencapsulated structural fill projects have become a focus of environmental concerns due to potential leaching of metals and structural failures. Cap-in-place of CCR surface impoundments is …