A Forest Management Nonpoint Source Risk Assessment 



MONTANA "RISK" MATRIX (3/9i) 



TYPE 



CLEARCUT 



PARTIAL CUT 



SITE PREP 



ROADS 



SLOPE 



SOIL 

 EROD. 





PS 











OSCQ 

 09 



H 



2** 



0-5% 



M 



H 



4* 



5-20% 



M 



H 



4* 



5* 



3** 



20-40% 



M 



4* 



H 



> 40% 



M 



( * Indicates Mean Value Used, ** Final Group Consensus A4justment for Internal Consistency) 



Figure I-l: Montana "Risk" Matrix (3/91) 



Flathead Basin Cooperative Program Final Report 



Page 117 



