• If the buffer Is heavily vegetated, and flow through the site is unac- 

 ceptable, construct a dike surrounding the material site designed 



for a flood with an acceptably low probability of occurrence (Figure 

 A- 1 2b). 



• If the buffer is lightly vegetated, build a dike along the river side 

 of the buffer designed for a flood with an acceptably low probability 

 of occurrence (Figure A-I2c). 



• If the buffer contains a high-water or abandoned channel, build a 

 dike along the river side of the buffer to keep flow out of the chan- 

 nel; the dike should be designed for a flood with an acceptably low 

 probability of occurrence (Figure A-I2d). 



As an example of buffer height design, consider the material site loca- 

 tion shown in Figure A-15. The buffer width has been estimated by historical 



Cross 

 Section 5 



Cross Section 6 



Buffer Width 

 200 m 



^ y /Pit 



Material 

 Site 



Cross Section 7- 



Figure A-13. Schematic of an example of buffer height design. 



103 



