Construction of Stabilization Works
with improved trafficability may be preferable. The choice depends upon the potential future
need for inspection and maintenance of the project, the landowners' desires, and
environmental considerations. A factor for projects involving trenchfill or other protection
methods which depend upon post-project erosion to a predetermined bankline is that hard-
surfaced ramps or roads riverward of the structure sometimes resist erosion more than the
adjacent natural bank material, perhaps to the detriment of obtaining the desired bankline in
a timely manner. In any case, disposition of access roads or ramps should be clearly stated
in the easements and in the specifications.
If the project involves stockpiling of stone or similar material prior to placement in the
work, restoration of stockpile areas must be addressed. Depending upon the landuse, residual
material may be a nuisance after construction, but completely removing it from the natural
ground surface without disturbing topsoil and drainage is difficult. To prevent these
problems, it may be appropriate to specify that such material be placed on a pad of natural
material or on skids of metal, wood, or engineering fabric to prevent it from becoming buried
in the existing topsoil. The stockpile area site can then easily be restored to natural conditions
after construction.
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