a. These structures should be constructed to minimize disturbance 

 to low- flow channels 



b. Dikes should be constructed of on-site gravel materials 



c. Fish entrapment should be avoided at all times 



5. In cases where vegetated areas cannot be avoided, clearing should 

 proceed using the following guidelines: 



a. If possible, sites containing dense vegetative cover should 

 be cleared during periods that do not coincide with periods 

 of bird and mammal breeding, nesting, and rear i ng-of-young. 



In most cases fall would be the most desirable period for vege- 

 tation remova I . 



b. When mature timber must be cut, It should be salvaged for pri- 

 vate or commercial use. If no such use exists, timber should 

 be ei ther : 



• Stockpiled out of the active floodplain 



• Used in site rehabilitation of adjacent material sites 



• Hauled to designated disposal areas 



• Piled and burned in accordance with appropriate regulations 



6. Other vegetation and organic overburden can be mechanically cleared 

 and should be collected. This material should be saved for possible 

 use during site closure. At sites located in inactive floodplains 



or terraces, this material should be broadcast over the surface during 

 site closure. In sites located only in an active floodplain, this 

 material can be piled (not broadcast) within the site according to the 

 following recommendations. The presence of this material in the materi- 



42 V. SITE PREPARATION 



