Table 9. Quantification Ratings of Change in Aufe i s Potential that Resulted 

 from the Gravel Removal Operation at Each of the 25 Sites 



Gravel 



removal Au f e i s 



River area potential 



Gold Run Creek 6 



Sinuk River A 5 



B 6 



Washington Creek A 10 



B 6 



Oregon Creek A 10 



B 5 



Penny River 6 



Nome R i ver 6 



Ugnuravik River 6jj 



Aufeis Creek A 6. 



Kuparuk River ° 



Skeetercake Creek 5 



Sagavan irktok River 6^ 



Ivishak River 6 



Shaviovik River 5^^ 



Kavik River 6jj 



Dietrich Ri ver-Upstream 7 



Dietrich River-Downstream 5 



Middle Fork Koyukuk Ri ver-Upstream A 5 



Middle Fork Koyukuk River-Downstream 8 



J im Ri ver ^^ 



Prospect Creek 5 



West Fork Tolovana River 5 



McManus Creek 6 



Tanana River-Downstream 5 



Tanana Ri ver-Upstream 5 



Phelan Creek 5 



Aufe is potential ratings: 



10 Large aufeis development observed in the disturbed area where no aufeis 

 was previously recorded 



9 Moderate sized aufeis development observed in the disturbed area where 

 no aufeis was previously recorded 



8 SmaTT aufe is development observed or a strong potential for aufe is occur- 

 rence is inferred 



7 Relocation of an existing aufe i s area by gravel removal activity 



6 Potential increase in aufeis activity resulting from gravel removal 

 act i v i t y 



5 No change in aufe is characteristics 



0-4 Not used 



''Rivers with a high potential tor icing activity prior to the gravel removal 

 operat ion. 



126 



