Protects Eroded Stream Bank

摘要

In summer 1999, West Bouldin Creek in Austin, Texas, had experienced significant erosion of a 150-fl long, 22-ft high section of a bluff adjacent to the South Sixth Street roadway. At this location, a near 90-degree turn in the creek created focused flows and erosive forces that severely undercut the outside bank of the creek. The concentrated flows had undermined the embankment to the point where emergency repair had to be implemented before the roadway was impacted. The erosive shale foundation soils, combined with a significant overburden of limestone, complicated the problem.