Slope/Stream Bank Stabilization

Project Overview Severe erosion concerns from tidally influenced coastal waters created a need for a permanent and relatively

Project Overview

Severe erosion concerns from tidally influenced coastal waters created a need for a permanent and relatively maintenance free erosion stabilization measure. Due to the location, within the confines of a restricted access Army Base, a tough durable solution was sought to perform in extreme conditions.

The 3,000 sqft section, along a steepened embankment, was eroding at a fast rate after the removal of post WW2 era bridge abutments. A solution was sought for overall economy, durability, quick installation, and to reduce maintenance.

Solution

Combat Concrete GCCM was chosen for overall cost effectiveness, speed of installation, and cost of materials, bringing immediate value to Hunter Army Airfield Public Works.

When compared with rip rap, which is usually not recommended for slopes over 2:1, the overall increased slope stability and reduced maintenance over time were additional considerations that were favorable for the selection of the Combat Concrete material.

The site was graded and prepared as a smooth working surface, the CC8 material was placed in lengths longitudinal to the slope. The entire slope was covered and hydrated, after being toed in at the top and covered with large ballast at the bottom.

The work was completed in one working day using Combat Concrete GCCM, saving time and worker hazard exposure.

The material was installed with a crew of three men and a trackhoe, using only simple hand tools to cut and seam the CC8. The two bulk rolls were placed by the contractor with no prior experience with Combat Concrete GCCM. No specialty labor, forms or equipment was required.

Photo: Milliken

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