ABSTRACT
An adverse effect is found when an undertaking may alter, directly or indirectly, any of the characteristics of a historic property that qualify the property for inclusion in the National Register in a manner that would diminish the integrity of the property's location, design, setting, materials, workmanship, feeling, or association. If a federal agency is going to get rid of a historic property through sale, lease, exchange, or other form of transfer, that's an adverse effect because the property will no longer have the protection of Section 106 and other federal laws. The responsible federal agency is supposed to apply the 'criteria' of adverse effect, in consultation with the State Historic Preservation Officer (SHPO) and other consulting parties. The responsible agency should be doing its National Environmental Policy Act (NEPA) review concurrently with its Section 106 review, and the effects that it's now found on historic properties should be factored into that review.
