Contents 



Figure E-5: Assessment Categories Rated as Impaired 



by Percentage of Total Reaches (95) 77 



Figure E-6: Impairment Values by Percentage of Managed Reaches (75) 78 



Figure E-7: Impairment Values by Percentage of Unmanaged Reaches (20) 78 

 Table E-2: Summary of Management Activities as Actual or 



Potential Sources of Stream Problems 79 



F. Assessments of Best Management Practices (Potts) 



Figure F-1: Percentage of timber sales with at least 



one major impact 84 

 Figure F-2: Percentage of timber sales with at least 



one minor impact 84 



Figure F-3: Percentage of impacts by BMP category 85 



G. Management Guidelines for Riparian Forests (Pfister and Sherwood) 



Table G- 1 : Habitat types observed on two or more of the BMP audit 



sites 93 

 Table G-2: Streamside Management Zone widths for various soil and slope 



classes 96 

 Table G-3: Soil erodibility based on parent material type 



(Cline and others 1981) 97 



Table G-4: Evaluation of proposed guides (Table G-3) on 48 sites 97 



Figure G- 1 : Field guide for locating the edges of the SMZ 98 



Figure G-2: Montana "Risk" Matrix (3/91) 1(X) 



H. Application of the Sequoia Method for Determining Cumulative 

 Watershed Effects in the Flathead Basin (Potts) 



Table H- 1 : Runoff Coefficients and Recovery Rates 1 06 



Table H-2: Extent of Activities — Equivalent Acres 107 



Figure H- 1 : S wan Watershed Map 1 08 



Table H-3: Comparison of model results 1 10 



I. A Forest Management Nonpoint Source Risk Assessment 

 Geographic Information Systems Application (Potts) 



Figure I- 1 : Montana "Risk" Matrix (3/91) 117 



Figure 1-2: The Howard Creek Watershed, Montana 118 



Figure 1-3: Geology Map for Howard Creek 1 19 

 Figure 1-4: Checkerboaid Ownership in the Howard 



Creek Watershed 120 



Flathead Basin Cooperative Program Final Report Page v 



