Erosion and Sediment Pollution Control Program Manual.pdf

CHAPTER 4 - SEDIMENT BARRIERS AND FILTERS
Sediment barriers are typically used as perimeter controls for small disturbed areas and as initial
protection against sediment pollution during construction of other BMPs such as sediment basins or
traps. Each type of sediment barrier has specific advantages and limitations. Care should be
exercised in the selection of any sediment barrier to ensure it is suited to the particular site conditions
where it is proposed.
PA DEP
FIGURE 4.1
Sediment Barrier Alignment
Sediment barriers should be installed on existing level grade in order to be effective. Barriers which
cross contours divert runoff to a low point where failure usually occurs. The ends of sediment barriers
should be turned upslope at 45 degrees to the main barrier alignment for a distance sufficient to elevate
the bottom of the barrier ends to the elevation of the top of the barrier at the lowest point. This is to
prevent runoff from flowing around the barrier rather than through it. For most locations, a distance of
8 feet will suffice, as shown in Figure 4.1. In locations where the topography is such that the barrier
would have to extend for a long distance, a compacted berm tying into the ends of the barrier may be
substituted for the upslope extension.
363-2134-008 / March 31, 2012 / Page 61