accumulated since a previous dredging cycle, versus "new v^^ork" or the length of 

 time between dredging cycles to associate a period of time for any shoaled 

 material. Also, once a shoal is "full," additional sediment will typically bypass 

 the shoaling area without adding volume. Therefore, USCG permit requests to 

 the Detroit District in the mid- to late 1990s for dredging volumes ranging from 

 2,500 to 5,000 cu m (3,300 to 6,700 cu yd) cannot be used with any degree of 

 confidence for estimating transport rates. 



Chapter 5 Sediment Transport 29 



