Bulletin 1486. U. S. Dept. of Agriculture 
Plate 2 
Drift Accumulations and Bars Formed by the Stream May Deflect 
the Current so as to Cause erosion 
A. — Drift accumulation against shore pier left by receding flood. At the next high water this 
drift may deflect the current in such a way as to cause damage by erosion 
B. — Deposit of gravel and sand left by a stream which has a steep gradient on its upper reaches. 
When the stream emerges on a flat near its mouth the current is slackened and deposition 
takes place. During a 5-year period this stream has moved across the channel three or four 
times. At the present time it impinges against the right wing, requiring riprap protection 
