Comparing scour protection methods

January 16th, 2024

By Steve Williams, P.E. Prior to the construction of the Manahawkin Bay Bridge project in New Jersey, scour conditions were identified during regular inspections conducted by the New Jersey Department of Transportation (NJDOT). As a result, the Federal Highway Administration (FHWA) requested that an updated scour analysis be performed at the three Thorofare Bridges. The bridges were […]

Read More

Propex Global announces engineered mattress system for scour and erosion protection

January 10th, 2022

Photograph courtesy of Propex Global Propex Global has launched the PYRAMATTRESS Engineered Mattress System, an erosion control solution designed to resist potential scour and erosion caused by the constant flow of water or high hydraulic stresses.  The system utilizes the durability and erosion resistance of PYRAMAT 75 High-Performance Turf Reinforcement Mat (HPTRM) to construct a […]

Read More

A new specification for geotextile grout filled mattresses

April 1st, 2021

By George R. Koerner FIGURE 1 GGFM being filled incrementally. Courtesy of HUESKER Geotextile grout filled mattresses (GGFM), also referred to (in ASTM D18.25/D35.05) as fabric-formed concrete (FFC) or fabric-formed concrete revetments (FFCR), are erosion-resistant concrete linings made from durable, permeable fabric forms that are filled with high-strength grout. GGFMs are generally sloping structures placed […]

Read More