Restoring the Prairie Creek Streambank
A preliminary, key component of streambank stabilization projects is determining project extents, both physical and budgetary. The appropriate solution often necessitates a delicate balance between cost efficiency and ensuring that the erosion issues are thoroughly addressed.
In this MooreWORKS brief, Lauren Haworth explores how streambank restoration remedies successfully repaired adverse effects facing Prairie Creek.
"The Dallas-Fort Worth (DFW) Metroplex has experienced rapid growth in recent decades. The population has doubled over the last 30 years, and from July 2014 to July 2015, the area added nearly 150,000 people. While this trend may benefit the Metroplex economically, it can strain existing infrastructure and adversely affect the natural environment. In 2007, the City of Richardson, Texas (an inner suburb of Dallas) was facing both of these issues within a single site on Prairie Creek.
Stream degradation in the DFW area typically occurs as the thalweg, or lowest point, of the stream moves downward until it reaches rock, which is relatively shallow in this area. At this point, the stream spreads outward. Such was the case at this site, and as a result, erosion exposed a sanitary sewer pipe in the streambed, endangering the integrity of the line. The challenge at the Prairie Creek site was to halt or significantly slow the natural outward progression of the stream, as relocating the line was outside the scope of the project."