United States Department of Agriculture
Natural Resources Conservation Service
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Combining Site Assessment (SA) Scores

Individual SA factor ratings are weighted (multiplied by the weight fractions) and added together to generate the total SA rating as shown in the table below.

Sample Table for Combining SA Scores
  Factor Factor Rating (0 to 100) times Factor Weight = Weighted Factor Rating Site/Area Rating
SA-1 Factor 1 80 times 0.0750 = 6.0  
Factor 2 75 times 0.0625 = 4.7  
Factor 3 60 times 0.0625 = 3.8  
SA-1 Subtotal 0.2000   14.5
SA-2 Factor 4 70 times 0.0750 = 5.2  
Factor 5 80 times 0.0750 = 6.0  
SA-2 Subtotal 0.1500   11.2
SA-3 Factor 6 0 times 0.0600 = 0  
Factor 7 100 times 0.0400 = 4.0  
Factor 8 50 times 0.0500 = 2.5  
SA-3 Subtotal 0.1500   6.5
SA Subtotal 0.5   32.2

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