2. I f an unvegetated site is armored by coarse gravels or cobbles that 

 do not meet project material specifications, they should be stock- 

 piled, used in a dike, or otherwise saved for dispersal over the 

 site during site closure. 



3. If it is necessary to locate a material site in an active side chan- 

 nel, it should first be diked off at the upstream and downstream 

 ends. The dikes should be constructed to a height corresponding to at 

 least the stage of a 5-year flood flowing in only the other chan- 

 nel(s). The side of the dikes facing the active channel should be 

 protected against erosion during such floods. Floods larger than this 

 may be allowed to overtop the dikes and flow through the material 

 site. Following large floods the downstream dike should be breached to 

 allow fish escapement. 



46 



V. SITE PREPARATION 



