Yes, it is possible for an archaeological site to be eligible under Criteria A, B, C, and D. The ACHP’s Section 106 regulations call for the federal agency to consider how all of the National Register qualifying characteristics of a historic property may be affected by the undertaking [36 CFR § 800.5(a)(1)].1 Accordingly, when conducting its evaluation, a federal agency should determine the full range of criteria that may apply to a property. National Register Bulletin No. 36, “Guidelines for Evaluating and Registering Archeological Properties” www.cr.nps.gov/nr/publications/bulletins/arch/), lays out a step-by-step process for evaluating sites under all of the criteria and provides useful examples.