ation with a significant event" for its cultural attri- 

 bute. The indicator's guideline has been specified 

 as "preservation of the site's sense of association." 

 If, for a given forecast date, the site's without-plans 

 condition shows that the association would be lost 

 as a result of planned residential development, but 

 its with-plan condition for Plan X shows that the as- 

 sociation would be preserved as a result of Federal 

 land acquisition included in the plan, the effect of 

 Plan X would be classified as beneficial. See Figure 

 3.4.14-1 for a graphic illustration of this example. 



(2) An effect is adverse if, for a given indicator, 

 the without-plans condition more closely ap- 

 proaches or attains the indicator's guideline than its 



with-plan condition. For example, the Gradey 

 Swamp habitat has been identified as an EQ re- 

 source with an indicator "habitat suitability" for its 

 ecological attribute. The indicator's guideline has 

 been specified as "habitat suitability index of 1.0." 

 An adverse effect would occur if, for a given fore- 

 cast date, the habitat's without-plans condition 

 showed a habitat suitability index of 0.7 and its 

 with-plan condition for Plan Y showed a habitat 

 suitability index of 0.5. See Figure 3.4.14-2 for a 

 graphic illustration of this example. 



120 



