When the SCDOT had severe erosion on a slope face of an overpass bridge on I-26 in Spartanburg County, the department turned to a proven solution. Having already used Concrete Cloth GCCM for a similar application, the SCDOT knew its value. In both cases, water coming off the bridge was running under a guardrail then down the slope of the approach embankment, causing erosion of the slope face. Concrete Cloth GCCM was used to create a flared inlet to funnel the water to the flume or downslope swale.
Hot mix asphalt or cast-in-place concrete are common solutions for these types of problems, but cast-in-place, especially, is a multi-step process that can add days to a small project such as this one.
The unique attributes of Concrete Cloth GCCM include the ability to customshape the material to the contours of the finished grade after the earthwork is completed to fill the previous erosion and its fit with the landscaping plan, which included the addition of trees and shrubs.
Concrete Cloth GCCM was used for this project because of its flexibility to conform to the terrain, which made an easy installation. The material can be installed by the earthmoving contractor with no subcontractors and is competitive against hot mix asphalt or cast-in-place concrete.
Concrete Cloth GCCM was a small part of the cost for this project, which required a significant amount of earthwork to correct the erosion. About $2,000 of Concrete Cloth GCCM was used for this project.
Application: Flume or Downslope Swale
Location: Spartanburg, SC
Installation: April 2014