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Geomembranes revolutionizing U.S. water industry: Tackling 2023 survey concerns
February 5th, 2024
By Felon Wilson XR-5 Geomembrane-lined, sunlight exposed sanitary sewer overflow impoundment in Alabama. Photo courtesy of Seaman Corporation. By coincidence, two independent surveys were recently released which identified key issues in the U.S. water industry. The reports are listed in Table 1. Table 1 While both reports address respondents’ perceptions of current and anticipated market […]
Maine DOT updates statewide three-year work plan
February 2nd, 2024
The Maine Department of Transportation (Maine DOT) recently released the 2024 edition of its three-year “Work Plan,” which details all of the agency’s capital projects and programs, maintenance and operations activities, planning initiatives, plus administrative functions for calendar years 2024, 2025, and 2026. Photo courtesy of Maine DOT. Maine DOT said its Work Plan is […]
Republic of Albania’s president visits Maccaferri Balkans’s plant
February 1st, 2024
The president of the Republic of Albania, Bajram Begaj, recently visited Maccaferri’s plant located in Shijak, Albania. He was welcomed by Group CEO Lapo Vivarelli Colonna, and Robert Masha, managing director of Maccaferri Balkans. The institutional visit was a key opportunity to communicate Maccaferri Balkans’s plans for the future and the group’s commitment to the […]
How geosynthetics help achieve CRISI objectives
February 1st, 2024
The U.S. Department of Transportation, under the Consolidated Rail Infrastructure and Safety Improvements (CRISI) program, has allocated more than $1.4 billion to upgrade and safeguard rail infrastructure across 35 states and the District of Columbia. This initiative, enriched by the Infrastructure Investment and Jobs Act (IIJA), focuses on ensuring more resilient, efficient and safe rail […]
Geosynthetics mobile app nearing 12,000 downloads
February 1st, 2024
The Federal Highway Administration (FHWA) Local Aid Support, in a collaborative effort with the Geosynthetic Materials Association (GMA), launched the Geosynthetics Installation Notes Tracker mobile app in January 2023 and by early November the app had garnered close to 12,000 downloads. Trinette Ballard, FHWA Local Aid Support program manager and mobile app developer, tells me […]
Bentonite Cutoff Anchorage
February 1st, 2024
Q: I have a bentonite cutoff wall containing a positive pressure inside and an overfill situation where the waste being capped will have perched water in the waste mass above the perimeter elevation. Do you have a recommendation for the perimeter connection detail for such a situation? A: We generally use an anchor trench beyond […]
Geomembrane formulation
February 1st, 2024
Q: We are specifying HDPE geomembrane for a critical project and noticed that GRI-GM13 only requires endurance testing “per formulation.” What is the definition of formulation and can we obtain Kiwa certification for a geomembrane produced using a known formulation? A: This definition can be found in section three (3) of GRI-GM13. It is as […]
Global/Slope Stability Analysis
February 1st, 2024
Q: My question stems from the fact that (in my area) there still seems to be confusion over when a global/slope stability analysis is required and who is responsible. A contractor might ask for some budget pricing for retaining wall design. Generally, this is in regards to a segmental retaining wall design. The challenging part […]
Resin Sampling
February 1st, 2024
Q: Is there a standard definition of a “lot of resin.” A: Yes, a “lot” of polyethylene (PE) resin has always been a railcar (approximately 180,000 pounds [81,647 kg) of resin) that would be about 210,000 pounds (95,254 kg) of (Let-down) finished goods (i.e., the formulation [i.e., resin plus masterbatch, which contains carbon black]). Please […]
Ply-Adhesion Values For Triplanar Geocomposites
February 1st, 2024
Q: Is there a minimum ply-adhesion value for a triplanar geocomposite? I ask this knowing that GRI-GN4 (Test Methods, Required Properties and Testing Frequency for Biplanar Geonets and Biplanar Geonet Composites) specification states a minimum of 1.0 pound/inch. A: Yes, the minimum ply-adhesion value of 1.0 ppi is a pretty good number for triplanar and […]