Silt In the Unified Soil Classification System (USCS) and the AASHTO Soil Classification system, the sand–silt distinction is made at the 0.075 mm particle size (i.e., material passing the #200 sieve). Silts and clays are distinguished mechanically by their plasticity. Silt is easily transported in water or other liquid and is fine enough to be carried long distances by air in the form of dust. Thick deposits of silty material resulting from deposition by aeolian processes are often called loess. Silt and clay contribute to turbidity in water. Silt is transported by streams or by water currents in the ocean. When
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