An innovative cover system to close an ash/sludge impoundment

August 1, 2019

By Paul C. O’Malley, José L. Urrutia and Don DiGuilio The two projects (confidential client) are industrial sites consisting of coal ash and by-product sludge located in the southeastern United States. The projects included 70 and 67 acres (28 and 27 ha) in closure areas, and the waste source consisted of industrial sludge with a …

Reviving the Palos Verdes Reservoir—Part 4

By John Heap and Chris Kelsey The active site work for the Palos Verdes Reservoir’s substantial update began in late 2016, advanced primarily throughout 2018 and concluded in the second quarter of 2019 with the filling of the reservoir. The project was immense for everyone involved, and with that has come the expected excitement, challenges …

A minitube blanket for landfill gas collection and containment

By Stephan Fourmont, Pascal Saunier and Toraj Ghofrani Landfill gas (LFG) is produced during the decomposition of putrescible material in landfills. Often referred to as biogas, LFG is a source of odors and fugitive greenhouse gas (GHG) emissions. LFG is typically 40%–60% methane, which is 25 times more potent to affect climate change than carbon …

Stabilization of subgrade soils during Interstate 95 lane widening

By Bryan C. Gee, Eric Klein and William T. Maier The Maryland Transportation Authority (MDTA) is implementing a multiyear, multiphase project to add express toll lanes (ETLs) to Interstate 95. The ETLs are providing significant congestion relief in one of the most heavily trafficked corridors in the United States. The major modification to I-95 consists …

Streambank restoration using engineered bank stabilization

June 1, 2019

By Jeffery T. Hoilman and Stanley M. Miller Mountain Creek flows through the community of Red Bank near Chattanooga, Tenn., to the Tennessee River. Mountain Creek has been identified by the Tennessee Department of Environment and Conservation (TDEC 2018) as a 303(d)-listed stream, meaning that its pollution exceeds the state’s standards for one or more …

Carthage Mills installs geocell in video

May 2, 2019

Carthage Mills has released a YouTube video showing the installation of a geocell on a slope. The company carries the CX and CXW Series of geocells, which are three-dimensional, expandable panels made from high-density polyethylene (HDPE). Engineers use such geocells for containment, erosion control and ground stabilization applications. They improve the structural and functional behavior …

Rebuilding roads, replacing transmission lines damaged during Hurricane Michael in Florida’s Panhandle

March 1, 2019

Hurricane Michael caused extensive damage to Florida’s power grid network, leveling more than 100 transmission towers in a 34-mile (55-km) right-of-way from Port St. Joe to Callaway. This right-of-way crosses swampy, remote and hard-to-reach areas, making rebuilding the grid even more challenging. This extremely wet, muddy ground prevented Duke Energy repair vehicles from accessing the …

GMA/IGS-NA to present webinar on geosynthetic-stabilized roads

November 2, 2018

The Geosynthetic Materials Association (GMA) and IGS North America (IGS-NA) will sponsor a free webinar entitled “Recent Developments in Geosynthetic-Stabilized Roads: Introduction and Mechanisms,” on Dec. 4, from 1 to 2 p.m. EST. Geotextiles, geogrids and geocells have been used widely in roadway stabilization works throughout the world. In this webinar, Dr. Jie Han will …

Registration open for 2019 IECA Annual Conference and Expo

October 30, 2018

The International Erosion Control Association (IECA) will host their annual educational conference and expo Feb. 19–22, 2019, at the Colorado Convention Center in Denver. “IECA’s Annual Conference and Expo is the most beneficial event in the country for those involved in or concerned about soil and erosion control or stormwater management,” said Joanna Fetherolf, IECA’s …

Geosynthetics magazine offers free sponsored webinar on natural facings for steep slopes and walls

October 24, 2018

Geosynthetics magazine will present the Tensar Corp.-sponsored webinar “Natural Facings for Better Performance and Value on Very Steep Slopes and Walls” on November 8 at 1:00 p.m. EST. This presentation will provide a case study example of how natural facings provide better performance and value on very steep slopes and walls. Steve Luptak, national product …