Erosion and Sediment Control Tip #67

 

So, what causes a slope failure?  Basically, the “driving force” exceeds the “resisting force”.  There are several types of slope failures, but the bottom line is that a Soil Mechanics or Geotechnical Engineer can do the analysis necessary to avoid this problem.

 

Perry L Oakes, PE

Erosion and Sediment Control Program Coordinator

Comments

Post a Comment

Popular posts from this blog

Today’s Erosion and Sediment Control Tip: #16

Image
  Today’s Erosion and Sediment Control Tip Sediment Basins require a device to dewater from the surface of the basin to remove the cleanest (less turbid) water.  This is often accomplished with a skimming device that is designed to remove the stored construction runoff over a period of 2 to 5 days.  It is important that the skimmer be installed and maintained properly. Skimmers must have a flexible connection to the rigid pipe or riser system that goes through the dam.  It should easily operate at all design elevations.  When placed on a principal spillway riser, the pipe from the skimmer to the flexible connection should be about 1.5 x the height of the riser structure. The flexible pipe outlet at the rigid pipe or riser system through the dam should be at the standing pool elevation to ensure the skimmer does not function below the required elevation. A rock pad should be constructed for the skimming device to rest on when discharge is complete.  The skim...
Read more

Erosion and Sediment Control Tip #72

Image
  Could someone please explain to me why landscaping is usually the “LAST” item to be complete on a construction job? Exposed soil should be stabilized at EVERY opportunity during a construction project.     ONLY 9 DAYS LEFT FOR EARLY BIRD REGISTRATION FOR CLEAR WATER ALABAMA!!   Perry L Oakes, PE Program Coordinator AL Erosion and Sediment Control Program
Read more

Erosion and Sediment Control Tip #71

Image
  Instead of raised islands in a parking lot, why not use a depressed island (Bioretention Swale or Bioswale).  This allows for some stormwater runoff to infiltrate the soil, decreases the peak runoff, decreases the volume of runoff, and allows for smaller stormwater pipes.  Makes sense to me.   Remember: The Early Bird rates for Clear Water Alabama 2024 end August 15, 2024.   Perry L Oakes, PE Program Coordinator AL Erosion and Sediment Control Program  
Read more