Silt three grades fine, medium and coarse 0.002 mm to 0.006 mm to 0.020 mm to 0.063 mm). In actuality, silt is chemically distinct from clay, and unlike clay, grains of silt are approximately the same size in all dimensions; furthermore, their size ranges overlap. Clays are formed from thin plate-shaped particles held together by electrostatic forces, so present a cohesion. Pure silts are not cohesive. According to the U.S. Department of Agriculture Soil Texture Classification system, the sand–silt distinction is made at the 0.05 mm particle size. The USDA system has been adopted by the Food and Agriculture Organization (FAO).
Gravel Run (Susquehanna River tributary) beam bridge was built over the stream in 1939 and repaired in 2003. It is long. A concrete tee beam bridge that is long was built over the stream in 1960. Bassett Campground is located near Gravel Run, in the stream's left floodway. As of August 31, 2011, the wild trout designation for Gravel Run is being considered. It has been proposed that the stream be designated as a stream with naturally reproducing trout. The stream's Chapter 93 Classification is considered to be a Coldwater Fishery and a Migratory Fishery throughout its drainage basin. Gravel Run (Susquehanna River tributary) Gravel